diff --git a/llvm/include/llvm/Transforms/Coroutines/ABI.h b/llvm/include/llvm/Transforms/Coroutines/ABI.h
index 0b2d405f3caec..30d0e214d6195 100644
--- a/llvm/include/llvm/Transforms/Coroutines/ABI.h
+++ b/llvm/include/llvm/Transforms/Coroutines/ABI.h
@@ -16,6 +16,7 @@
 #define LLVM_TRANSFORMS_COROUTINES_ABI_H
 
 #include "llvm/Analysis/TargetTransformInfo.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Coroutines/CoroShape.h"
 #include "llvm/Transforms/Coroutines/MaterializationUtils.h"
 #include "llvm/Transforms/Coroutines/SuspendCrossingInfo.h"
@@ -37,7 +38,7 @@ namespace coro {
 // index of an ABI generator for the custom ABI object in a SmallVector passed
 // to CoroSplitPass ctor.
 
-class BaseABI {
+class LLVM_ABI BaseABI {
 public:
   BaseABI(Function &F, coro::Shape &S,
           std::function<bool(Instruction &)> IsMaterializable)
@@ -63,7 +64,7 @@ class BaseABI {
   std::function<bool(Instruction &I)> IsMaterializable;
 };
 
-class SwitchABI : public BaseABI {
+class LLVM_ABI SwitchABI : public BaseABI {
 public:
   SwitchABI(Function &F, coro::Shape &S,
             std::function<bool(Instruction &)> IsMaterializable)
@@ -76,7 +77,7 @@ class SwitchABI : public BaseABI {
                       TargetTransformInfo &TTI) override;
 };
 
-class AsyncABI : public BaseABI {
+class LLVM_ABI AsyncABI : public BaseABI {
 public:
   AsyncABI(Function &F, coro::Shape &S,
            std::function<bool(Instruction &)> IsMaterializable)
@@ -89,7 +90,7 @@ class AsyncABI : public BaseABI {
                       TargetTransformInfo &TTI) override;
 };
 
-class AnyRetconABI : public BaseABI {
+class LLVM_ABI AnyRetconABI : public BaseABI {
 public:
   AnyRetconABI(Function &F, coro::Shape &S,
                std::function<bool(Instruction &)> IsMaterializable)
diff --git a/llvm/include/llvm/Transforms/Coroutines/CoroInstr.h b/llvm/include/llvm/Transforms/Coroutines/CoroInstr.h
index b8c846596c994..0688068167ae6 100644
--- a/llvm/include/llvm/Transforms/Coroutines/CoroInstr.h
+++ b/llvm/include/llvm/Transforms/Coroutines/CoroInstr.h
@@ -27,6 +27,7 @@
 
 #include "llvm/IR/GlobalVariable.h"
 #include "llvm/IR/IntrinsicInst.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/raw_ostream.h"
 
 namespace llvm {
@@ -237,7 +238,7 @@ class AnyCoroIdRetconInst : public AnyCoroIdInst {
   enum { SizeArg, AlignArg, StorageArg, PrototypeArg, AllocArg, DeallocArg };
 
 public:
-  void checkWellFormed() const;
+  LLVM_ABI void checkWellFormed() const;
 
   uint64_t getStorageSize() const {
     return cast<ConstantInt>(getArgOperand(SizeArg))->getZExtValue();
@@ -306,7 +307,7 @@ class CoroIdAsyncInst : public AnyCoroIdInst {
   enum { SizeArg, AlignArg, StorageArg, AsyncFuncPtrArg };
 
 public:
-  void checkWellFormed() const;
+  LLVM_ABI void checkWellFormed() const;
 
   /// The initial async function context size. The fields of which are reserved
   /// for use by the frontend. The frame will be allocated as a tail of this
@@ -568,7 +569,7 @@ class CoroSuspendAsyncInst : public AnyCoroSuspendInst {
     MustTailCallFuncArg
   };
 
-  void checkWellFormed() const;
+  LLVM_ABI void checkWellFormed() const;
 
   unsigned getStorageArgumentIndex() const {
     auto *Arg = cast<ConstantInt>(getArgOperand(StorageArgNoArg));
@@ -722,7 +723,7 @@ class CoroAsyncEndInst : public AnyCoroEndInst {
   enum { FrameArg, UnwindArg, MustTailCallFuncArg };
 
 public:
-  void checkWellFormed() const;
+  LLVM_ABI void checkWellFormed() const;
 
   Function *getMustTailCallFunction() const {
     if (arg_size() < 3)
diff --git a/llvm/include/llvm/Transforms/Coroutines/CoroShape.h b/llvm/include/llvm/Transforms/Coroutines/CoroShape.h
index 891774b446571..c54081de2d9da 100644
--- a/llvm/include/llvm/Transforms/Coroutines/CoroShape.h
+++ b/llvm/include/llvm/Transforms/Coroutines/CoroShape.h
@@ -14,6 +14,7 @@
 
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Coroutines/CoroInstr.h"
 
 namespace llvm {
@@ -78,18 +79,20 @@ struct Shape {
   }
 
   // Scan the function and collect the above intrinsics for later processing
-  void analyze(Function &F, SmallVectorImpl<CoroFrameInst *> &CoroFrames,
-               SmallVectorImpl<CoroSaveInst *> &UnusedCoroSaves,
-               CoroPromiseInst *&CoroPromise);
+  LLVM_ABI void analyze(Function &F,
+                        SmallVectorImpl<CoroFrameInst *> &CoroFrames,
+                        SmallVectorImpl<CoroSaveInst *> &UnusedCoroSaves,
+                        CoroPromiseInst *&CoroPromise);
   // If for some reason, we were not able to find coro.begin, bailout.
-  void invalidateCoroutine(Function &F,
-                           SmallVectorImpl<CoroFrameInst *> &CoroFrames);
+  LLVM_ABI void
+  invalidateCoroutine(Function &F,
+                      SmallVectorImpl<CoroFrameInst *> &CoroFrames);
   // Perform ABI related initial transformation
-  void initABI();
+  LLVM_ABI void initABI();
   // Remove orphaned and unnecessary intrinsics
-  void cleanCoroutine(SmallVectorImpl<CoroFrameInst *> &CoroFrames,
-                      SmallVectorImpl<CoroSaveInst *> &UnusedCoroSaves,
-                      CoroPromiseInst *CoroPromise);
+  LLVM_ABI void cleanCoroutine(SmallVectorImpl<CoroFrameInst *> &CoroFrames,
+                               SmallVectorImpl<CoroSaveInst *> &UnusedCoroSaves,
+                               CoroPromiseInst *CoroPromise);
 
   // Field indexes for special fields in the switch lowering.
   struct SwitchFieldIndex {
@@ -256,12 +259,14 @@ struct Shape {
   /// Allocate memory according to the rules of the active lowering.
   ///
   /// \param CG - if non-null, will be updated for the new call
-  Value *emitAlloc(IRBuilder<> &Builder, Value *Size, CallGraph *CG) const;
+  LLVM_ABI Value *emitAlloc(IRBuilder<> &Builder, Value *Size,
+                            CallGraph *CG) const;
 
   /// Deallocate memory according to the rules of the active lowering.
   ///
   /// \param CG - if non-null, will be updated for the new call
-  void emitDealloc(IRBuilder<> &Builder, Value *Ptr, CallGraph *CG) const;
+  LLVM_ABI void emitDealloc(IRBuilder<> &Builder, Value *Ptr,
+                            CallGraph *CG) const;
 
   Shape() = default;
   explicit Shape(Function &F) {
diff --git a/llvm/include/llvm/Transforms/Coroutines/CoroSplit.h b/llvm/include/llvm/Transforms/Coroutines/CoroSplit.h
index 6c6a982e82805..f7cc6f29879f9 100644
--- a/llvm/include/llvm/Transforms/Coroutines/CoroSplit.h
+++ b/llvm/include/llvm/Transforms/Coroutines/CoroSplit.h
@@ -18,6 +18,7 @@
 #include "llvm/Analysis/CGSCCPassManager.h"
 #include "llvm/Analysis/LazyCallGraph.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Coroutines/ABI.h"
 
 namespace llvm {
@@ -31,20 +32,23 @@ struct CoroSplitPass : PassInfoMixin<CoroSplitPass> {
   using BaseABITy =
       std::function<std::unique_ptr<coro::BaseABI>(Function &, coro::Shape &)>;
 
-  CoroSplitPass(bool OptimizeFrame = false);
+  LLVM_ABI CoroSplitPass(bool OptimizeFrame = false);
 
-  CoroSplitPass(SmallVector<BaseABITy> GenCustomABIs,
-                bool OptimizeFrame = false);
+  LLVM_ABI CoroSplitPass(SmallVector<BaseABITy> GenCustomABIs,
+                         bool OptimizeFrame = false);
 
+  LLVM_ABI
   CoroSplitPass(std::function<bool(Instruction &)> MaterializableCallback,
                 bool OptimizeFrame = false);
 
+  LLVM_ABI
   CoroSplitPass(std::function<bool(Instruction &)> MaterializableCallback,
                 SmallVector<BaseABITy> GenCustomABIs,
                 bool OptimizeFrame = false);
 
-  PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
-                        LazyCallGraph &CG, CGSCCUpdateResult &UR);
+  LLVM_ABI PreservedAnalyses run(LazyCallGraph::SCC &C,
+                                 CGSCCAnalysisManager &AM, LazyCallGraph &CG,
+                                 CGSCCUpdateResult &UR);
 
   static bool isRequired() { return true; }
 
diff --git a/llvm/include/llvm/Transforms/Coroutines/MaterializationUtils.h b/llvm/include/llvm/Transforms/Coroutines/MaterializationUtils.h
index d8fc0c86a6fb5..558984fed0300 100644
--- a/llvm/include/llvm/Transforms/Coroutines/MaterializationUtils.h
+++ b/llvm/include/llvm/Transforms/Coroutines/MaterializationUtils.h
@@ -6,6 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Coroutines/SuspendCrossingInfo.h"
 
 #ifndef LLVM_TRANSFORMS_COROUTINES_MATERIALIZATIONUTILS_H
@@ -16,11 +17,12 @@ namespace llvm {
 namespace coro {
 
 // True if I is trivially rematerialzable, e.g. InsertElementInst
-bool isTriviallyMaterializable(Instruction &I);
+LLVM_ABI bool isTriviallyMaterializable(Instruction &I);
 
 // Performs rematerialization, invoked from buildCoroutineFrame.
-void doRematerializations(Function &F, SuspendCrossingInfo &Checker,
-                          std::function<bool(Instruction &)> IsMaterializable);
+LLVM_ABI void
+doRematerializations(Function &F, SuspendCrossingInfo &Checker,
+                     std::function<bool(Instruction &)> IsMaterializable);
 
 } // namespace coro
 
diff --git a/llvm/include/llvm/Transforms/Coroutines/SuspendCrossingInfo.h b/llvm/include/llvm/Transforms/Coroutines/SuspendCrossingInfo.h
index 88cbf88acc4cd..1e04f09ddc275 100644
--- a/llvm/include/llvm/Transforms/Coroutines/SuspendCrossingInfo.h
+++ b/llvm/include/llvm/Transforms/Coroutines/SuspendCrossingInfo.h
@@ -21,6 +21,7 @@
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/Instruction.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Coroutines/CoroInstr.h"
 
 namespace llvm {
@@ -102,19 +103,21 @@ class SuspendCrossingInfo {
             ModuleSlotTracker &MST) const;
 #endif
 
+  LLVM_ABI
   SuspendCrossingInfo(Function &F,
                       const SmallVectorImpl<AnyCoroSuspendInst *> &CoroSuspends,
                       const SmallVectorImpl<AnyCoroEndInst *> &CoroEnds);
 
   /// Returns true if there is a path from \p From to \p To crossing a suspend
   /// point without crossing \p From a 2nd time.
-  bool hasPathCrossingSuspendPoint(BasicBlock *From, BasicBlock *To) const;
+  LLVM_ABI bool hasPathCrossingSuspendPoint(BasicBlock *From,
+                                            BasicBlock *To) const;
 
   /// Returns true if there is a path from \p From to \p To crossing a suspend
   /// point without crossing \p From a 2nd time. If \p From is the same as \p To
   /// this will also check if there is a looping path crossing a suspend point.
-  bool hasPathOrLoopCrossingSuspendPoint(BasicBlock *From,
-                                         BasicBlock *To) const;
+  LLVM_ABI bool hasPathOrLoopCrossingSuspendPoint(BasicBlock *From,
+                                                  BasicBlock *To) const;
 
   bool isDefinitionAcrossSuspend(BasicBlock *DefBB, User *U) const {
     auto *I = cast<Instruction>(U);
diff --git a/llvm/include/llvm/Transforms/HipStdPar/HipStdPar.h b/llvm/include/llvm/Transforms/HipStdPar/HipStdPar.h
index 5ff38bdf04812..20850ba4c02d2 100644
--- a/llvm/include/llvm/Transforms/HipStdPar/HipStdPar.h
+++ b/llvm/include/llvm/Transforms/HipStdPar/HipStdPar.h
@@ -19,6 +19,7 @@
 #define LLVM_TRANSFORMS_HIPSTDPAR_HIPSTDPAR_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -27,7 +28,7 @@ class Module;
 class HipStdParAcceleratorCodeSelectionPass
   : public PassInfoMixin<HipStdParAcceleratorCodeSelectionPass> {
 public:
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
 
   static bool isRequired() { return true; }
 };
@@ -35,7 +36,7 @@ class HipStdParAcceleratorCodeSelectionPass
 class HipStdParAllocationInterpositionPass
   : public PassInfoMixin<HipStdParAllocationInterpositionPass> {
 public:
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
 
   static bool isRequired() { return true; }
 };
diff --git a/llvm/include/llvm/Transforms/IPO.h b/llvm/include/llvm/Transforms/IPO.h
index ee0e35aa61832..56b30968ffd77 100644
--- a/llvm/include/llvm/Transforms/IPO.h
+++ b/llvm/include/llvm/Transforms/IPO.h
@@ -24,29 +24,29 @@ class raw_ostream;
 /// createDeadArgEliminationPass - This pass removes arguments from functions
 /// which are not used by the body of the function.
 ///
-ModulePass *createDeadArgEliminationPass();
+LLVM_ABI ModulePass *createDeadArgEliminationPass();
 
 /// DeadArgHacking pass - Same as DAE, but delete arguments of external
 /// functions as well.  This is definitely not safe, and should only be used by
 /// bugpoint.
-ModulePass *createDeadArgHackingPass();
+LLVM_ABI ModulePass *createDeadArgHackingPass();
 
 //===----------------------------------------------------------------------===//
 //
 /// createLoopExtractorPass - This pass extracts all natural loops from the
 /// program into a function if it can.
 ///
-Pass *createLoopExtractorPass();
+LLVM_ABI Pass *createLoopExtractorPass();
 
 /// createSingleLoopExtractorPass - This pass extracts one natural loop from the
 /// program into a function if it can.  This is used by bugpoint.
 ///
-Pass *createSingleLoopExtractorPass();
+LLVM_ABI Pass *createSingleLoopExtractorPass();
 
 //===----------------------------------------------------------------------===//
 /// createBarrierNoopPass - This pass is purely a module pass barrier in a pass
 /// manager.
-ModulePass *createBarrierNoopPass();
+LLVM_ABI ModulePass *createBarrierNoopPass();
 
 /// What to do with the summary when running passes that operate on it.
 enum class PassSummaryAction {
diff --git a/llvm/include/llvm/Transforms/IPO/AlwaysInliner.h b/llvm/include/llvm/Transforms/IPO/AlwaysInliner.h
index 252cfd4dc5f37..679126b011d8e 100644
--- a/llvm/include/llvm/Transforms/IPO/AlwaysInliner.h
+++ b/llvm/include/llvm/Transforms/IPO/AlwaysInliner.h
@@ -15,6 +15,7 @@
 #define LLVM_TRANSFORMS_IPO_ALWAYSINLINER_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -36,14 +37,13 @@ class AlwaysInlinerPass : public PassInfoMixin<AlwaysInlinerPass> {
   AlwaysInlinerPass(bool InsertLifetime = true)
       : InsertLifetime(InsertLifetime) {}
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
   static bool isRequired() { return true; }
 };
 
 /// Create a legacy pass manager instance of a pass to inline and remove
 /// functions marked as "always_inline".
-Pass *createAlwaysInlinerLegacyPass(bool InsertLifetime = true);
-
+LLVM_ABI Pass *createAlwaysInlinerLegacyPass(bool InsertLifetime = true);
 }
 
 #endif // LLVM_TRANSFORMS_IPO_ALWAYSINLINER_H
diff --git a/llvm/include/llvm/Transforms/IPO/Attributor.h b/llvm/include/llvm/Transforms/IPO/Attributor.h
index c628bbb007230..e6eb756df987d 100644
--- a/llvm/include/llvm/Transforms/IPO/Attributor.h
+++ b/llvm/include/llvm/Transforms/IPO/Attributor.h
@@ -129,6 +129,7 @@
 #include "llvm/Support/Alignment.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/Casting.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/DOTGraphTraits.h"
 #include "llvm/Support/DebugCounter.h"
 #include "llvm/Support/ErrorHandling.h"
@@ -172,7 +173,7 @@ enum class GPUAddressSpace : unsigned {
 };
 
 /// Return true iff \p M target a GPU (and we can use GPU AS reasoning).
-bool isGPU(const Module &M);
+LLVM_ABI bool isGPU(const Module &M);
 
 /// Flags to distinguish intra-procedural queries from *potentially*
 /// inter-procedural queries. Not that information can be valid for both and
@@ -195,30 +196,32 @@ struct ValueAndContext : public std::pair<Value *, const Instruction *> {
 
 /// Return true if \p I is a `nosync` instruction. Use generic reasoning and
 /// potentially the corresponding AANoSync.
-bool isNoSyncInst(Attributor &A, const Instruction &I,
-                  const AbstractAttribute &QueryingAA);
+LLVM_ABI bool isNoSyncInst(Attributor &A, const Instruction &I,
+                           const AbstractAttribute &QueryingAA);
 
 /// Return true if \p V is dynamically unique, that is, there are no two
 /// "instances" of \p V at runtime with different values.
 /// Note: If \p ForAnalysisOnly is set we only check that the Attributor will
 /// never use \p V to represent two "instances" not that \p V could not
 /// technically represent them.
-bool isDynamicallyUnique(Attributor &A, const AbstractAttribute &QueryingAA,
-                         const Value &V, bool ForAnalysisOnly = true);
+LLVM_ABI bool isDynamicallyUnique(Attributor &A,
+                                  const AbstractAttribute &QueryingAA,
+                                  const Value &V, bool ForAnalysisOnly = true);
 
 /// Return true if \p V is a valid value in \p Scope, that is a constant or an
 /// instruction/argument of \p Scope.
-bool isValidInScope(const Value &V, const Function *Scope);
+LLVM_ABI bool isValidInScope(const Value &V, const Function *Scope);
 
 /// Return true if the value of \p VAC is a valid at the position of \p VAC,
 /// that is a constant, an argument of the same function, or an instruction in
 /// that function that dominates the position.
-bool isValidAtPosition(const ValueAndContext &VAC, InformationCache &InfoCache);
+LLVM_ABI bool isValidAtPosition(const ValueAndContext &VAC,
+                                InformationCache &InfoCache);
 
 /// Try to convert \p V to type \p Ty without introducing new instructions. If
 /// this is not possible return `nullptr`. Note: this function basically knows
 /// how to cast various constants.
-Value *getWithType(Value &V, Type &Ty);
+LLVM_ABI Value *getWithType(Value &V, Type &Ty);
 
 /// Return the combination of \p A and \p B such that the result is a possible
 /// value of both. \p B is potentially casted to match the type \p Ty or the
@@ -228,7 +231,7 @@ Value *getWithType(Value &V, Type &Ty);
 ///        X + none  => X
 /// not_none + undef => not_none
 ///          V1 + V2 => nullptr
-std::optional<Value *>
+LLVM_ABI std::optional<Value *>
 combineOptionalValuesInAAValueLatice(const std::optional<Value *> &A,
                                      const std::optional<Value *> &B, Type *Ty);
 
@@ -328,11 +331,10 @@ inline bool operator==(const RangeTy &A, const RangeTy &B) {
 inline bool operator!=(const RangeTy &A, const RangeTy &B) { return !(A == B); }
 
 /// Return the initial value of \p Obj with type \p Ty if that is a constant.
-Constant *getInitialValueForObj(Attributor &A,
-                                const AbstractAttribute &QueryingAA, Value &Obj,
-                                Type &Ty, const TargetLibraryInfo *TLI,
-                                const DataLayout &DL,
-                                RangeTy *RangePtr = nullptr);
+LLVM_ABI Constant *
+getInitialValueForObj(Attributor &A, const AbstractAttribute &QueryingAA,
+                      Value &Obj, Type &Ty, const TargetLibraryInfo *TLI,
+                      const DataLayout &DL, RangeTy *RangePtr = nullptr);
 
 /// Collect all potential values \p LI could read into \p PotentialValues. That
 /// is, the only values read by \p LI are assumed to be known and all are in
@@ -345,7 +347,7 @@ Constant *getInitialValueForObj(Attributor &A,
 /// \returns True if the assumed potential copies are all in \p PotentialValues,
 ///          false if something went wrong and the copies could not be
 ///          determined.
-bool getPotentiallyLoadedValues(
+LLVM_ABI bool getPotentiallyLoadedValues(
     Attributor &A, LoadInst &LI, SmallSetVector<Value *, 4> &PotentialValues,
     SmallSetVector<Instruction *, 4> &PotentialValueOrigins,
     const AbstractAttribute &QueryingAA, bool &UsedAssumedInformation,
@@ -360,20 +362,22 @@ bool getPotentiallyLoadedValues(
 /// \returns True if the assumed potential copies are all in \p PotentialCopies,
 ///          false if something went wrong and the copies could not be
 ///          determined.
-bool getPotentialCopiesOfStoredValue(
+LLVM_ABI bool getPotentialCopiesOfStoredValue(
     Attributor &A, StoreInst &SI, SmallSetVector<Value *, 4> &PotentialCopies,
     const AbstractAttribute &QueryingAA, bool &UsedAssumedInformation,
     bool OnlyExact = false);
 
 /// Return true if \p IRP is readonly. This will query respective AAs that
 /// deduce the information and introduce dependences for \p QueryingAA.
-bool isAssumedReadOnly(Attributor &A, const IRPosition &IRP,
-                       const AbstractAttribute &QueryingAA, bool &IsKnown);
+LLVM_ABI bool isAssumedReadOnly(Attributor &A, const IRPosition &IRP,
+                                const AbstractAttribute &QueryingAA,
+                                bool &IsKnown);
 
 /// Return true if \p IRP is readnone. This will query respective AAs that
 /// deduce the information and introduce dependences for \p QueryingAA.
-bool isAssumedReadNone(Attributor &A, const IRPosition &IRP,
-                       const AbstractAttribute &QueryingAA, bool &IsKnown);
+LLVM_ABI bool isAssumedReadNone(Attributor &A, const IRPosition &IRP,
+                                const AbstractAttribute &QueryingAA,
+                                bool &IsKnown);
 
 /// Return true if \p ToI is potentially reachable from \p FromI without running
 /// into any instruction in \p ExclusionSet The two instructions do not need to
@@ -383,29 +387,31 @@ bool isAssumedReadNone(Attributor &A, const IRPosition &IRP,
 /// reached. If the query is not interested in callers beyond a certain point,
 /// e.g., a GPU kernel entry or the function containing an alloca, the
 /// \p GoBackwardsCB should return false.
-bool isPotentiallyReachable(
+LLVM_ABI bool isPotentiallyReachable(
     Attributor &A, const Instruction &FromI, const Instruction &ToI,
     const AbstractAttribute &QueryingAA,
     const AA::InstExclusionSetTy *ExclusionSet = nullptr,
     std::function<bool(const Function &F)> GoBackwardsCB = nullptr);
 
 /// Same as above but it is sufficient to reach any instruction in \p ToFn.
-bool isPotentiallyReachable(
+LLVM_ABI bool isPotentiallyReachable(
     Attributor &A, const Instruction &FromI, const Function &ToFn,
     const AbstractAttribute &QueryingAA,
     const AA::InstExclusionSetTy *ExclusionSet = nullptr,
     std::function<bool(const Function &F)> GoBackwardsCB = nullptr);
 
 /// Return true if \p Obj is assumed to be a thread local object.
-bool isAssumedThreadLocalObject(Attributor &A, Value &Obj,
-                                const AbstractAttribute &QueryingAA);
+LLVM_ABI bool isAssumedThreadLocalObject(Attributor &A, Value &Obj,
+                                         const AbstractAttribute &QueryingAA);
 
 /// Return true if \p I is potentially affected by a barrier.
-bool isPotentiallyAffectedByBarrier(Attributor &A, const Instruction &I,
-                                    const AbstractAttribute &QueryingAA);
-bool isPotentiallyAffectedByBarrier(Attributor &A, ArrayRef<const Value *> Ptrs,
-                                    const AbstractAttribute &QueryingAA,
-                                    const Instruction *CtxI);
+LLVM_ABI bool
+isPotentiallyAffectedByBarrier(Attributor &A, const Instruction &I,
+                               const AbstractAttribute &QueryingAA);
+LLVM_ABI bool
+isPotentiallyAffectedByBarrier(Attributor &A, ArrayRef<const Value *> Ptrs,
+                               const AbstractAttribute &QueryingAA,
+                               const Instruction *CtxI);
 } // namespace AA
 
 template <>
@@ -483,7 +489,7 @@ struct DenseMapInfo<const AA::InstExclusionSetTy *>
 
 /// The value passed to the line option that defines the maximal initialization
 /// chain length.
-extern unsigned MaxInitializationChainLength;
+LLVM_ABI extern unsigned MaxInitializationChainLength;
 
 ///{
 enum class ChangeStatus {
@@ -491,10 +497,10 @@ enum class ChangeStatus {
   UNCHANGED,
 };
 
-ChangeStatus operator|(ChangeStatus l, ChangeStatus r);
-ChangeStatus &operator|=(ChangeStatus &l, ChangeStatus r);
-ChangeStatus operator&(ChangeStatus l, ChangeStatus r);
-ChangeStatus &operator&=(ChangeStatus &l, ChangeStatus r);
+LLVM_ABI ChangeStatus operator|(ChangeStatus l, ChangeStatus r);
+LLVM_ABI ChangeStatus &operator|=(ChangeStatus &l, ChangeStatus r);
+LLVM_ABI ChangeStatus operator&(ChangeStatus l, ChangeStatus r);
+LLVM_ABI ChangeStatus &operator&=(ChangeStatus &l, ChangeStatus r);
 
 enum class DepClassTy {
   REQUIRED, ///< The target cannot be valid if the source is not.
@@ -565,13 +571,13 @@ struct AADepGraph {
   iterator begin() { return SyntheticRoot.child_begin(); }
   iterator end() { return SyntheticRoot.child_end(); }
 
-  void viewGraph();
+  LLVM_ABI void viewGraph();
 
   /// Dump graph to file
-  void dumpGraph();
+  LLVM_ABI void dumpGraph();
 
   /// Print dependency graph
-  void print();
+  LLVM_ABI void print();
 };
 
 /// Helper to describe and deal with positions in the LLVM-IR.
@@ -728,7 +734,7 @@ struct IRPosition {
   }
 
   /// Return the associated argument, if any.
-  Argument *getAssociatedArgument() const;
+  LLVM_ABI Argument *getAssociatedArgument() const;
 
   /// Return true if the position refers to a function interface, that is the
   /// function scope, the function return, or an argument.
@@ -937,8 +943,8 @@ struct IRPosition {
   /// Special DenseMap key values.
   ///
   ///{
-  static const IRPosition EmptyKey;
-  static const IRPosition TombstoneKey;
+  LLVM_ABI static const IRPosition EmptyKey;
+  LLVM_ABI static const IRPosition TombstoneKey;
   ///}
 
   /// Conversion into a void * to allow reuse of pointer hashing.
@@ -1015,7 +1021,7 @@ struct IRPosition {
   }
 
   /// Verify internal invariants.
-  void verify();
+  LLVM_ABI void verify();
 
   /// Return the underlying pointer as Value *, valid for all positions but
   /// IRP_CALL_SITE_ARGUMENT.
@@ -1118,7 +1124,7 @@ class SubsumingPositionIterator {
   using iterator = decltype(IRPositions)::iterator;
 
 public:
-  SubsumingPositionIterator(const IRPosition &IRP);
+  LLVM_ABI SubsumingPositionIterator(const IRPosition &IRP);
   iterator begin() { return IRPositions.begin(); }
   iterator end() { return IRPositions.end(); }
 };
@@ -1343,14 +1349,15 @@ struct InformationCache {
 
   /// Return all functions that might be called indirectly, only valid for
   /// closed world modules (see isClosedWorldModule).
-  ArrayRef<Function *> getIndirectlyCallableFunctions(Attributor &A) const;
+  LLVM_ABI ArrayRef<Function *>
+  getIndirectlyCallableFunctions(Attributor &A) const;
 
   /// Return the flat address space if the associated target has.
-  std::optional<unsigned> getFlatAddressSpace() const;
+  LLVM_ABI std::optional<unsigned> getFlatAddressSpace() const;
 
 private:
   struct FunctionInfo {
-    ~FunctionInfo();
+    LLVM_ABI ~FunctionInfo();
 
     /// A nested map that remembers all instructions in a function with a
     /// certain instruction opcode (Instruction::getOpcode()).
@@ -1391,7 +1398,7 @@ struct InformationCache {
   ///
   /// This method needs to be called for all function that might be looked at
   /// through the information cache interface *prior* to looking at them.
-  void initializeInformationCache(const Function &F, FunctionInfo &FI);
+  LLVM_ABI void initializeInformationCache(const Function &F, FunctionInfo &FI);
 
   /// The datalayout used in the module.
   const DataLayout &DL;
@@ -1529,10 +1536,11 @@ struct Attributor {
   ///                  the abstract attributes.
   /// \param Configuration The Attributor configuration which determines what
   ///                      generic features to use.
-  Attributor(SetVector<Function *> &Functions, InformationCache &InfoCache,
-             AttributorConfig Configuration);
+  LLVM_ABI Attributor(SetVector<Function *> &Functions,
+                      InformationCache &InfoCache,
+                      AttributorConfig Configuration);
 
-  ~Attributor();
+  LLVM_ABI ~Attributor();
 
   /// Run the analyses until a fixpoint is reached or enforced (timeout).
   ///
@@ -1540,7 +1548,7 @@ struct Attributor {
   /// as the Attributor is not destroyed (it owns the attributes now).
   ///
   /// \Returns CHANGED if the IR was changed, otherwise UNCHANGED.
-  ChangeStatus run();
+  LLVM_ABI ChangeStatus run();
 
   /// Lookup an abstract attribute of type \p AAType at position \p IRP. While
   /// no abstract attribute is found equivalent positions are checked, see
@@ -1681,7 +1689,7 @@ struct Attributor {
   }
 
   /// Allows a query AA to request an update if a new query was received.
-  void registerForUpdate(AbstractAttribute &AA);
+  LLVM_ABI void registerForUpdate(AbstractAttribute &AA);
 
   /// Explicitly record a dependence from \p FromAA to \p ToAA, that is if
   /// \p FromAA changes \p ToAA should be updated as well.
@@ -1694,8 +1702,9 @@ struct Attributor {
   /// That means for required dependences, if \p FromAA changes to an invalid
   /// state, \p ToAA can be moved to a pessimistic fixpoint because it required
   /// information from \p FromAA but none are available anymore.
-  void recordDependence(const AbstractAttribute &FromAA,
-                        const AbstractAttribute &ToAA, DepClassTy DepClass);
+  LLVM_ABI void recordDependence(const AbstractAttribute &FromAA,
+                                 const AbstractAttribute &ToAA,
+                                 DepClassTy DepClass);
 
   /// Introduce a new abstract attribute into the fixpoint analysis.
   ///
@@ -1743,7 +1752,7 @@ struct Attributor {
 
   /// Return true if the module contains the whole world, thus, no outside
   /// functions exist.
-  bool isClosedWorldModule() const;
+  LLVM_ABI bool isClosedWorldModule() const;
 
   /// Return true if we derive attributes for \p Fn
   bool isRunOn(Function &Fn) const { return isRunOn(&Fn); }
@@ -1819,7 +1828,7 @@ struct Attributor {
   /// reason for this is the single interface, the one of the abstract attribute
   /// instance, which can be queried without the need to look at the IR in
   /// various places.
-  void identifyDefaultAbstractAttributes(Function &F);
+  LLVM_ABI void identifyDefaultAbstractAttributes(Function &F);
 
   /// Determine whether the function \p F is IPO amendable
   ///
@@ -1914,17 +1923,19 @@ struct Attributor {
 
   /// Return the attributes of kind \p AK existing in the IR as operand bundles
   /// of an llvm.assume.
-  bool getAttrsFromAssumes(const IRPosition &IRP, Attribute::AttrKind AK,
-                           SmallVectorImpl<Attribute> &Attrs);
+  LLVM_ABI bool getAttrsFromAssumes(const IRPosition &IRP,
+                                    Attribute::AttrKind AK,
+                                    SmallVectorImpl<Attribute> &Attrs);
 
   /// Return true if any kind in \p AKs existing in the IR at a position that
   /// will affect this one. See also getAttrs(...).
   /// \param IgnoreSubsumingPositions Flag to determine if subsuming positions,
   ///                                 e.g., the function position if this is an
   ///                                 argument position, should be ignored.
-  bool hasAttr(const IRPosition &IRP, ArrayRef<Attribute::AttrKind> AKs,
-               bool IgnoreSubsumingPositions = false,
-               Attribute::AttrKind ImpliedAttributeKind = Attribute::None);
+  LLVM_ABI bool
+  hasAttr(const IRPosition &IRP, ArrayRef<Attribute::AttrKind> AKs,
+          bool IgnoreSubsumingPositions = false,
+          Attribute::AttrKind ImpliedAttributeKind = Attribute::None);
 
   /// Return the attributes of any kind in \p AKs existing in the IR at a
   /// position that will affect this one. While each position can only have a
@@ -1934,20 +1945,22 @@ struct Attributor {
   /// \param IgnoreSubsumingPositions Flag to determine if subsuming positions,
   ///                                 e.g., the function position if this is an
   ///                                 argument position, should be ignored.
-  void getAttrs(const IRPosition &IRP, ArrayRef<Attribute::AttrKind> AKs,
-                SmallVectorImpl<Attribute> &Attrs,
-                bool IgnoreSubsumingPositions = false);
+  LLVM_ABI void getAttrs(const IRPosition &IRP,
+                         ArrayRef<Attribute::AttrKind> AKs,
+                         SmallVectorImpl<Attribute> &Attrs,
+                         bool IgnoreSubsumingPositions = false);
 
   /// Remove all \p AttrKinds attached to \p IRP.
-  ChangeStatus removeAttrs(const IRPosition &IRP,
-                           ArrayRef<Attribute::AttrKind> AttrKinds);
-  ChangeStatus removeAttrs(const IRPosition &IRP, ArrayRef<StringRef> Attrs);
+  LLVM_ABI ChangeStatus removeAttrs(const IRPosition &IRP,
+                                    ArrayRef<Attribute::AttrKind> AttrKinds);
+  LLVM_ABI ChangeStatus removeAttrs(const IRPosition &IRP,
+                                    ArrayRef<StringRef> Attrs);
 
   /// Attach \p DeducedAttrs to \p IRP, if \p ForceReplace is set we do this
   /// even if the same attribute kind was already present.
-  ChangeStatus manifestAttrs(const IRPosition &IRP,
-                             ArrayRef<Attribute> DeducedAttrs,
-                             bool ForceReplace = false);
+  LLVM_ABI ChangeStatus manifestAttrs(const IRPosition &IRP,
+                                      ArrayRef<Attribute> DeducedAttrs,
+                                      bool ForceReplace = false);
 
 private:
   /// Helper to check \p Attrs for \p AK, if not found, check if \p
@@ -1972,9 +1985,9 @@ struct Attributor {
 public:
   /// If \p IRP is assumed to be a constant, return it, if it is unclear yet,
   /// return std::nullopt, otherwise return `nullptr`.
-  std::optional<Constant *> getAssumedConstant(const IRPosition &IRP,
-                                               const AbstractAttribute &AA,
-                                               bool &UsedAssumedInformation);
+  LLVM_ABI std::optional<Constant *>
+  getAssumedConstant(const IRPosition &IRP, const AbstractAttribute &AA,
+                     bool &UsedAssumedInformation);
   std::optional<Constant *> getAssumedConstant(const Value &V,
                                                const AbstractAttribute &AA,
                                                bool &UsedAssumedInformation) {
@@ -2001,10 +2014,9 @@ struct Attributor {
   /// return std::nullopt, otherwise return `nullptr`. Same as the public
   /// version except that it can be used without recording dependences on any \p
   /// AA.
-  std::optional<Value *> getAssumedSimplified(const IRPosition &V,
-                                              const AbstractAttribute *AA,
-                                              bool &UsedAssumedInformation,
-                                              AA::ValueScope S);
+  LLVM_ABI std::optional<Value *>
+  getAssumedSimplified(const IRPosition &V, const AbstractAttribute *AA,
+                       bool &UsedAssumedInformation, AA::ValueScope S);
 
   /// Try to simplify \p IRP and in the scope \p S. If successful, true is
   /// returned and all potential values \p IRP can take are put into \p Values.
@@ -2012,12 +2024,11 @@ struct Attributor {
   /// those could not be simplified to a single value. Recursive calls with
   /// these instructions will yield their respective potential values. If false
   /// is returned no other information is valid.
-  bool getAssumedSimplifiedValues(const IRPosition &IRP,
-                                  const AbstractAttribute *AA,
-                                  SmallVectorImpl<AA::ValueAndContext> &Values,
-                                  AA::ValueScope S,
-                                  bool &UsedAssumedInformation,
-                                  bool RecurseForSelectAndPHI = true);
+  LLVM_ABI bool
+  getAssumedSimplifiedValues(const IRPosition &IRP, const AbstractAttribute *AA,
+                             SmallVectorImpl<AA::ValueAndContext> &Values,
+                             AA::ValueScope S, bool &UsedAssumedInformation,
+                             bool RecurseForSelectAndPHI = true);
 
   /// Register \p CB as a simplification callback.
   /// `Attributor::getAssumedSimplified` will use these callbacks before
@@ -2093,7 +2104,7 @@ struct Attributor {
 
 public:
   /// Translate \p V from the callee context into the call site context.
-  std::optional<Value *>
+  LLVM_ABI std::optional<Value *>
   translateArgumentToCallSiteContent(std::optional<Value *> V, CallBase &CB,
                                      const AbstractAttribute &AA,
                                      bool &UsedAssumedInformation);
@@ -2101,49 +2112,56 @@ struct Attributor {
   /// Return true if \p AA (or its context instruction) is assumed dead.
   ///
   /// If \p LivenessAA is not provided it is queried.
-  bool isAssumedDead(const AbstractAttribute &AA, const AAIsDead *LivenessAA,
-                     bool &UsedAssumedInformation,
-                     bool CheckBBLivenessOnly = false,
-                     DepClassTy DepClass = DepClassTy::OPTIONAL);
+  LLVM_ABI bool isAssumedDead(const AbstractAttribute &AA,
+                              const AAIsDead *LivenessAA,
+                              bool &UsedAssumedInformation,
+                              bool CheckBBLivenessOnly = false,
+                              DepClassTy DepClass = DepClassTy::OPTIONAL);
 
   /// Return true if \p I is assumed dead.
   ///
   /// If \p LivenessAA is not provided it is queried.
-  bool isAssumedDead(const Instruction &I, const AbstractAttribute *QueryingAA,
-                     const AAIsDead *LivenessAA, bool &UsedAssumedInformation,
-                     bool CheckBBLivenessOnly = false,
-                     DepClassTy DepClass = DepClassTy::OPTIONAL,
-                     bool CheckForDeadStore = false);
+  LLVM_ABI bool isAssumedDead(const Instruction &I,
+                              const AbstractAttribute *QueryingAA,
+                              const AAIsDead *LivenessAA,
+                              bool &UsedAssumedInformation,
+                              bool CheckBBLivenessOnly = false,
+                              DepClassTy DepClass = DepClassTy::OPTIONAL,
+                              bool CheckForDeadStore = false);
 
   /// Return true if \p U is assumed dead.
   ///
   /// If \p FnLivenessAA is not provided it is queried.
-  bool isAssumedDead(const Use &U, const AbstractAttribute *QueryingAA,
-                     const AAIsDead *FnLivenessAA, bool &UsedAssumedInformation,
-                     bool CheckBBLivenessOnly = false,
-                     DepClassTy DepClass = DepClassTy::OPTIONAL);
+  LLVM_ABI bool isAssumedDead(const Use &U, const AbstractAttribute *QueryingAA,
+                              const AAIsDead *FnLivenessAA,
+                              bool &UsedAssumedInformation,
+                              bool CheckBBLivenessOnly = false,
+                              DepClassTy DepClass = DepClassTy::OPTIONAL);
 
   /// Return true if \p IRP is assumed dead.
   ///
   /// If \p FnLivenessAA is not provided it is queried.
-  bool isAssumedDead(const IRPosition &IRP, const AbstractAttribute *QueryingAA,
-                     const AAIsDead *FnLivenessAA, bool &UsedAssumedInformation,
-                     bool CheckBBLivenessOnly = false,
-                     DepClassTy DepClass = DepClassTy::OPTIONAL);
+  LLVM_ABI bool isAssumedDead(const IRPosition &IRP,
+                              const AbstractAttribute *QueryingAA,
+                              const AAIsDead *FnLivenessAA,
+                              bool &UsedAssumedInformation,
+                              bool CheckBBLivenessOnly = false,
+                              DepClassTy DepClass = DepClassTy::OPTIONAL);
 
   /// Return true if \p BB is assumed dead.
   ///
   /// If \p LivenessAA is not provided it is queried.
-  bool isAssumedDead(const BasicBlock &BB, const AbstractAttribute *QueryingAA,
-                     const AAIsDead *FnLivenessAA,
-                     DepClassTy DepClass = DepClassTy::OPTIONAL);
+  LLVM_ABI bool isAssumedDead(const BasicBlock &BB,
+                              const AbstractAttribute *QueryingAA,
+                              const AAIsDead *FnLivenessAA,
+                              DepClassTy DepClass = DepClassTy::OPTIONAL);
 
   /// Check \p Pred on all potential Callees of \p CB.
   ///
   /// This method will evaluate \p Pred with all potential callees of \p CB as
   /// input and return true if \p Pred does. If some callees might be unknown
   /// this function will return false.
-  bool checkForAllCallees(
+  LLVM_ABI bool checkForAllCallees(
       function_ref<bool(ArrayRef<const Function *> Callees)> Pred,
       const AbstractAttribute &QueryingAA, const CallBase &CB);
 
@@ -2156,13 +2174,14 @@ struct Attributor {
   /// what original used was replaced by a new one (or new ones). The visit is
   /// cut short if \p EquivalentUseCB returns false and the function will return
   /// false as well.
-  bool checkForAllUses(function_ref<bool(const Use &, bool &)> Pred,
-                       const AbstractAttribute &QueryingAA, const Value &V,
-                       bool CheckBBLivenessOnly = false,
-                       DepClassTy LivenessDepClass = DepClassTy::OPTIONAL,
-                       bool IgnoreDroppableUses = true,
-                       function_ref<bool(const Use &OldU, const Use &NewU)>
-                           EquivalentUseCB = nullptr);
+  LLVM_ABI bool checkForAllUses(
+      function_ref<bool(const Use &, bool &)> Pred,
+      const AbstractAttribute &QueryingAA, const Value &V,
+      bool CheckBBLivenessOnly = false,
+      DepClassTy LivenessDepClass = DepClassTy::OPTIONAL,
+      bool IgnoreDroppableUses = true,
+      function_ref<bool(const Use &OldU, const Use &NewU)> EquivalentUseCB =
+          nullptr);
 
   /// Emit a remark generically.
   ///
@@ -2300,8 +2319,9 @@ struct Attributor {
   ///
   /// \returns True, if the replacement can be registered, via
   /// registerFunctionSignatureRewrite, false otherwise.
-  bool isValidFunctionSignatureRewrite(Argument &Arg,
-                                       ArrayRef<Type *> ReplacementTypes);
+  LLVM_ABI bool
+  isValidFunctionSignatureRewrite(Argument &Arg,
+                                  ArrayRef<Type *> ReplacementTypes);
 
   /// Register a rewrite for a function signature.
   ///
@@ -2311,7 +2331,7 @@ struct Attributor {
   /// \p CalleeRepairCB.
   ///
   /// \returns True, if the replacement was registered, false otherwise.
-  bool registerFunctionSignatureRewrite(
+  LLVM_ABI bool registerFunctionSignatureRewrite(
       Argument &Arg, ArrayRef<Type *> ReplacementTypes,
       ArgumentReplacementInfo::CalleeRepairCBTy &&CalleeRepairCB,
       ArgumentReplacementInfo::ACSRepairCBTy &&ACSRepairCB);
@@ -2323,10 +2343,10 @@ struct Attributor {
   /// all call sites are known, hence the function has internal linkage.
   /// If true is returned, \p UsedAssumedInformation is set if assumed
   /// information was used to skip or simplify potential call sites.
-  bool checkForAllCallSites(function_ref<bool(AbstractCallSite)> Pred,
-                            const AbstractAttribute &QueryingAA,
-                            bool RequireAllCallSites,
-                            bool &UsedAssumedInformation);
+  LLVM_ABI bool checkForAllCallSites(function_ref<bool(AbstractCallSite)> Pred,
+                                     const AbstractAttribute &QueryingAA,
+                                     bool RequireAllCallSites,
+                                     bool &UsedAssumedInformation);
 
   /// Check \p Pred on all call sites of \p Fn.
   ///
@@ -2335,17 +2355,18 @@ struct Attributor {
   /// all call sites are known, hence the function has internal linkage.
   /// If true is returned, \p UsedAssumedInformation is set if assumed
   /// information was used to skip or simplify potential call sites.
-  bool checkForAllCallSites(function_ref<bool(AbstractCallSite)> Pred,
-                            const Function &Fn, bool RequireAllCallSites,
-                            const AbstractAttribute *QueryingAA,
-                            bool &UsedAssumedInformation,
-                            bool CheckPotentiallyDead = false);
+  LLVM_ABI bool checkForAllCallSites(function_ref<bool(AbstractCallSite)> Pred,
+                                     const Function &Fn,
+                                     bool RequireAllCallSites,
+                                     const AbstractAttribute *QueryingAA,
+                                     bool &UsedAssumedInformation,
+                                     bool CheckPotentiallyDead = false);
 
   /// Check \p Pred on all values potentially returned by the function
   /// associated with \p QueryingAA.
   ///
   /// This is the context insensitive version of the method above.
-  bool
+  LLVM_ABI bool
   checkForAllReturnedValues(function_ref<bool(Value &)> Pred,
                             const AbstractAttribute &QueryingAA,
                             AA::ValueScope S = AA::ValueScope::Intraprocedural,
@@ -2356,24 +2377,24 @@ struct Attributor {
   ///
   /// This method will evaluate \p Pred on all instructions with an opcode
   /// present in \p Opcode and return true if \p Pred holds on all of them.
-  bool checkForAllInstructions(function_ref<bool(Instruction &)> Pred,
-                               const Function *Fn,
-                               const AbstractAttribute *QueryingAA,
-                               ArrayRef<unsigned> Opcodes,
-                               bool &UsedAssumedInformation,
-                               bool CheckBBLivenessOnly = false,
-                               bool CheckPotentiallyDead = false);
+  LLVM_ABI bool checkForAllInstructions(function_ref<bool(Instruction &)> Pred,
+                                        const Function *Fn,
+                                        const AbstractAttribute *QueryingAA,
+                                        ArrayRef<unsigned> Opcodes,
+                                        bool &UsedAssumedInformation,
+                                        bool CheckBBLivenessOnly = false,
+                                        bool CheckPotentiallyDead = false);
 
   /// Check \p Pred on all instructions with an opcode present in \p Opcodes.
   ///
   /// This method will evaluate \p Pred on all instructions with an opcode
   /// present in \p Opcode and return true if \p Pred holds on all of them.
-  bool checkForAllInstructions(function_ref<bool(Instruction &)> Pred,
-                               const AbstractAttribute &QueryingAA,
-                               ArrayRef<unsigned> Opcodes,
-                               bool &UsedAssumedInformation,
-                               bool CheckBBLivenessOnly = false,
-                               bool CheckPotentiallyDead = false);
+  LLVM_ABI bool checkForAllInstructions(function_ref<bool(Instruction &)> Pred,
+                                        const AbstractAttribute &QueryingAA,
+                                        ArrayRef<unsigned> Opcodes,
+                                        bool &UsedAssumedInformation,
+                                        bool CheckBBLivenessOnly = false,
+                                        bool CheckPotentiallyDead = false);
 
   /// Check \p Pred on all call-like instructions (=CallBased derived).
   ///
@@ -2395,9 +2416,10 @@ struct Attributor {
   /// This method will evaluate \p Pred on all instructions that read or write
   /// to memory present in the information cache and return true if \p Pred
   /// holds on all of them.
-  bool checkForAllReadWriteInstructions(function_ref<bool(Instruction &)> Pred,
-                                        AbstractAttribute &QueryingAA,
-                                        bool &UsedAssumedInformation);
+  LLVM_ABI bool
+  checkForAllReadWriteInstructions(function_ref<bool(Instruction &)> Pred,
+                                   AbstractAttribute &QueryingAA,
+                                   bool &UsedAssumedInformation);
 
   /// Create a shallow wrapper for \p F such that \p F has internal linkage
   /// afterwards. It also sets the original \p F 's name to anonymous
@@ -2413,11 +2435,11 @@ struct Attributor {
   ///     return F(arg0, ..., argN);
   ///   }
   ///
-  static void createShallowWrapper(Function &F);
+  LLVM_ABI static void createShallowWrapper(Function &F);
 
   /// Returns true if the function \p F can be internalized. i.e. it has a
   /// compatible linkage.
-  static bool isInternalizable(Function &F);
+  LLVM_ABI static bool isInternalizable(Function &F);
 
   /// Make another copy of the function \p F such that the copied version has
   /// internal linkage afterwards and can be analysed. Then we replace all uses
@@ -2432,7 +2454,8 @@ struct Attributor {
   ///
   /// If the function \p F failed to be internalized the return value will be a
   /// null pointer.
-  static Function *internalizeFunction(Function &F, bool Force = false);
+  LLVM_ABI static Function *internalizeFunction(Function &F,
+                                                bool Force = false);
 
   /// Make copies of each function in the set \p FnSet such that the copied
   /// version has internal linkage afterwards and can be analysed. Then we
@@ -2447,8 +2470,9 @@ struct Attributor {
   /// once and then replace the uses. This prevents internalized functions being
   /// called by external functions when there is an internalized version in the
   /// module.
-  static bool internalizeFunctions(SmallPtrSetImpl<Function *> &FnSet,
-                                   DenseMap<Function *, Function *> &FnMap);
+  LLVM_ABI static bool
+  internalizeFunctions(SmallPtrSetImpl<Function *> &FnSet,
+                       DenseMap<Function *, Function *> &FnMap);
 
   /// Return the data layout associated with the anchor scope.
   const DataLayout &getDataLayout() const { return InfoCache.DL; }
@@ -2483,14 +2507,14 @@ struct Attributor {
 
   /// Run `::update` on \p AA and track the dependences queried while doing so.
   /// Also adjust the state if we know further updates are not necessary.
-  ChangeStatus updateAA(AbstractAttribute &AA);
+  LLVM_ABI ChangeStatus updateAA(AbstractAttribute &AA);
 
   /// Remember the dependences on the top of the dependence stack such that they
   /// may trigger further updates. (\see DependenceStack)
   void rememberDependences();
 
   /// Determine if CallBase context in \p IRP should be propagated.
-  bool shouldPropagateCallBaseContext(const IRPosition &IRP);
+  LLVM_ABI bool shouldPropagateCallBaseContext(const IRPosition &IRP);
 
   /// Apply all requested function signature rewrites
   /// (\see registerFunctionSignatureRewrite) and return Changed if the module
@@ -2500,7 +2524,7 @@ struct Attributor {
 
   /// Check if the Attribute \p AA should be seeded.
   /// See getOrCreateAAFor.
-  bool shouldSeedAttribute(AbstractAttribute &AA);
+  LLVM_ABI bool shouldSeedAttribute(AbstractAttribute &AA);
 
   /// A nested map to lookup abstract attributes based on the argument position
   /// on the outer level, and the addresses of the static member (AAType::ID) on
@@ -3292,7 +3316,7 @@ struct IRAttribute : public BaseType {
 ///       both directions will be added in the future.
 /// NOTE: The mechanics of adding a new "concrete" abstract attribute are
 ///       described in the file comment.
-struct AbstractAttribute : public IRPosition, public AADepGraphNode {
+struct LLVM_ABI AbstractAttribute : public IRPosition, public AADepGraphNode {
   using StateType = AbstractState;
 
   AbstractAttribute(const IRPosition &IRP) : IRPosition(IRP) {}
@@ -3431,11 +3455,11 @@ struct AbstractAttribute : public IRPosition, public AADepGraphNode {
 /// Forward declarations of output streams for debug purposes.
 ///
 ///{
-raw_ostream &operator<<(raw_ostream &OS, const AbstractAttribute &AA);
-raw_ostream &operator<<(raw_ostream &OS, ChangeStatus S);
-raw_ostream &operator<<(raw_ostream &OS, IRPosition::Kind);
-raw_ostream &operator<<(raw_ostream &OS, const IRPosition &);
-raw_ostream &operator<<(raw_ostream &OS, const AbstractState &State);
+LLVM_ABI raw_ostream &operator<<(raw_ostream &OS, const AbstractAttribute &AA);
+LLVM_ABI raw_ostream &operator<<(raw_ostream &OS, ChangeStatus S);
+LLVM_ABI raw_ostream &operator<<(raw_ostream &OS, IRPosition::Kind);
+LLVM_ABI raw_ostream &operator<<(raw_ostream &OS, const IRPosition &);
+LLVM_ABI raw_ostream &operator<<(raw_ostream &OS, const AbstractState &State);
 template <typename base_ty, base_ty BestState, base_ty WorstState>
 raw_ostream &
 operator<<(raw_ostream &OS,
@@ -3443,29 +3467,32 @@ operator<<(raw_ostream &OS,
   return OS << "(" << S.getKnown() << "-" << S.getAssumed() << ")"
             << static_cast<const AbstractState &>(S);
 }
-raw_ostream &operator<<(raw_ostream &OS, const IntegerRangeState &State);
+LLVM_ABI raw_ostream &operator<<(raw_ostream &OS,
+                                 const IntegerRangeState &State);
 ///}
 
 struct AttributorPass : public PassInfoMixin<AttributorPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 struct AttributorCGSCCPass : public PassInfoMixin<AttributorCGSCCPass> {
-  PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
-                        LazyCallGraph &CG, CGSCCUpdateResult &UR);
+  LLVM_ABI PreservedAnalyses run(LazyCallGraph::SCC &C,
+                                 CGSCCAnalysisManager &AM, LazyCallGraph &CG,
+                                 CGSCCUpdateResult &UR);
 };
 
 /// A more lightweight version of the Attributor which only runs attribute
 /// inference but no simplifications.
 struct AttributorLightPass : public PassInfoMixin<AttributorLightPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 /// A more lightweight version of the Attributor which only runs attribute
 /// inference but no simplifications.
 struct AttributorLightCGSCCPass
     : public PassInfoMixin<AttributorLightCGSCCPass> {
-  PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
-                        LazyCallGraph &CG, CGSCCUpdateResult &UR);
+  LLVM_ABI PreservedAnalyses run(LazyCallGraph::SCC &C,
+                                 CGSCCAnalysisManager &AM, LazyCallGraph &CG,
+                                 CGSCCUpdateResult &UR);
 };
 
 /// Helper function to clamp a state \p S of type \p StateType with the
@@ -3496,7 +3523,8 @@ struct AANoUnwind
   bool isKnownNoUnwind() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANoUnwind &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AANoUnwind &createForPosition(const IRPosition &IRP,
+                                                Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AANoUnwind"; }
@@ -3510,7 +3538,7 @@ struct AANoUnwind
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 struct AANoSync
@@ -3566,20 +3594,22 @@ struct AANoSync
   /// Helper function used to determine whether an instruction is non-relaxed
   /// atomic. In other words, if an atomic instruction does not have unordered
   /// or monotonic ordering
-  static bool isNonRelaxedAtomic(const Instruction *I);
+  LLVM_ABI static bool isNonRelaxedAtomic(const Instruction *I);
 
   /// Helper function specific for intrinsics which are potentially volatile.
-  static bool isNoSyncIntrinsic(const Instruction *I);
+  LLVM_ABI static bool isNoSyncIntrinsic(const Instruction *I);
 
   /// Helper function to determine if \p CB is an aligned (GPU) barrier. Aligned
   /// barriers have to be executed by all threads. The flag \p ExecutedAligned
   /// indicates if the call is executed by all threads in a (thread) block in an
   /// aligned way. If that is the case, non-aligned barriers are effectively
   /// aligned barriers.
-  static bool isAlignedBarrier(const CallBase &CB, bool ExecutedAligned);
+  LLVM_ABI static bool isAlignedBarrier(const CallBase &CB,
+                                        bool ExecutedAligned);
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANoSync &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AANoSync &createForPosition(const IRPosition &IRP,
+                                              Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AANoSync"; }
@@ -3593,7 +3623,7 @@ struct AANoSync
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for all nonnull attributes.
@@ -3619,8 +3649,8 @@ struct AAMustProgress
   bool isKnownMustProgress() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAMustProgress &createForPosition(const IRPosition &IRP,
-                                           Attributor &A);
+  LLVM_ABI static AAMustProgress &createForPosition(const IRPosition &IRP,
+                                                    Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAMustProgress"; }
@@ -3635,7 +3665,7 @@ struct AAMustProgress
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for all nonnull attributes.
@@ -3661,9 +3691,9 @@ struct AANonNull
   }
 
   /// See AbstractAttribute::isImpliedByIR(...).
-  static bool isImpliedByIR(Attributor &A, const IRPosition &IRP,
-                            Attribute::AttrKind ImpliedAttributeKind,
-                            bool IgnoreSubsumingPositions = false);
+  LLVM_ABI static bool isImpliedByIR(Attributor &A, const IRPosition &IRP,
+                                     Attribute::AttrKind ImpliedAttributeKind,
+                                     bool IgnoreSubsumingPositions = false);
 
   /// Return true if we assume that the underlying value is nonnull.
   bool isAssumedNonNull() const { return getAssumed(); }
@@ -3672,7 +3702,8 @@ struct AANonNull
   bool isKnownNonNull() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANonNull &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AANonNull &createForPosition(const IRPosition &IRP,
+                                               Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AANonNull"; }
@@ -3686,7 +3717,7 @@ struct AANonNull
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract attribute for norecurse.
@@ -3703,7 +3734,8 @@ struct AANoRecurse
   bool isKnownNoRecurse() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANoRecurse &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AANoRecurse &createForPosition(const IRPosition &IRP,
+                                                 Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AANoRecurse"; }
@@ -3717,7 +3749,7 @@ struct AANoRecurse
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract attribute for willreturn.
@@ -3767,7 +3799,8 @@ struct AAWillReturn
   bool isKnownWillReturn() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAWillReturn &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AAWillReturn &createForPosition(const IRPosition &IRP,
+                                                  Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAWillReturn"; }
@@ -3781,7 +3814,7 @@ struct AAWillReturn
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract attribute for undefined behavior.
@@ -3803,8 +3836,8 @@ struct AAUndefinedBehavior
   virtual bool isKnownToCauseUB(Instruction *I) const = 0;
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAUndefinedBehavior &createForPosition(const IRPosition &IRP,
-                                                Attributor &A);
+  LLVM_ABI static AAUndefinedBehavior &createForPosition(const IRPosition &IRP,
+                                                         Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAUndefinedBehavior"; }
@@ -3819,7 +3852,7 @@ struct AAUndefinedBehavior
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface to determine reachability of point A to B.
@@ -3836,8 +3869,8 @@ struct AAIntraFnReachability
       const AA::InstExclusionSetTy *ExclusionSet = nullptr) const = 0;
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAIntraFnReachability &createForPosition(const IRPosition &IRP,
-                                                  Attributor &A);
+  LLVM_ABI static AAIntraFnReachability &
+  createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAIntraFnReachability"; }
@@ -3852,7 +3885,7 @@ struct AAIntraFnReachability
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for all noalias attributes.
@@ -3870,9 +3903,9 @@ struct AANoAlias
   }
 
   /// See IRAttribute::isImpliedByIR
-  static bool isImpliedByIR(Attributor &A, const IRPosition &IRP,
-                            Attribute::AttrKind ImpliedAttributeKind,
-                            bool IgnoreSubsumingPositions = false);
+  LLVM_ABI static bool isImpliedByIR(Attributor &A, const IRPosition &IRP,
+                                     Attribute::AttrKind ImpliedAttributeKind,
+                                     bool IgnoreSubsumingPositions = false);
 
   /// See AbstractAttribute::requiresCallersForArgOrFunction
   static bool requiresCallersForArgOrFunction() { return true; }
@@ -3884,7 +3917,8 @@ struct AANoAlias
   bool isKnownNoAlias() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANoAlias &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AANoAlias &createForPosition(const IRPosition &IRP,
+                                               Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AANoAlias"; }
@@ -3898,7 +3932,7 @@ struct AANoAlias
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An AbstractAttribute for nofree.
@@ -3934,7 +3968,8 @@ struct AANoFree
   bool isKnownNoFree() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANoFree &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AANoFree &createForPosition(const IRPosition &IRP,
+                                              Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AANoFree"; }
@@ -3948,7 +3983,7 @@ struct AANoFree
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An AbstractAttribute for noreturn.
@@ -3965,7 +4000,8 @@ struct AANoReturn
   bool isKnownNoReturn() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANoReturn &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AANoReturn &createForPosition(const IRPosition &IRP,
+                                                Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AANoReturn"; }
@@ -3979,7 +4015,7 @@ struct AANoReturn
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for liveness abstract attribute.
@@ -4046,7 +4082,8 @@ struct AAIsDead
 
 public:
   /// Create an abstract attribute view for the position \p IRP.
-  static AAIsDead &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AAIsDead &createForPosition(const IRPosition &IRP,
+                                              Attributor &A);
 
   /// Determine if \p F might catch asynchronous exceptions.
   static bool mayCatchAsynchronousExceptions(const Function &F) {
@@ -4074,7 +4111,7 @@ struct AAIsDead
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 
   friend struct Attributor;
 };
@@ -4255,8 +4292,8 @@ struct AADereferenceable
   }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AADereferenceable &createForPosition(const IRPosition &IRP,
-                                              Attributor &A);
+  LLVM_ABI static AADereferenceable &createForPosition(const IRPosition &IRP,
+                                                       Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AADereferenceable"; }
@@ -4271,7 +4308,7 @@ struct AADereferenceable
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 using AAAlignmentStateType =
@@ -4308,10 +4345,11 @@ struct AAAlign
   }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAAlign &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AAAlign &createForPosition(const IRPosition &IRP,
+                                             Attributor &A);
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface to track if a value leaves it's defining function
@@ -4335,8 +4373,8 @@ struct AAInstanceInfo : public StateWrapper<BooleanState, AbstractAttribute> {
   bool isAssumedUniqueForAnalysis() const { return isAssumed(); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAInstanceInfo &createForPosition(const IRPosition &IRP,
-                                           Attributor &A);
+  LLVM_ABI static AAInstanceInfo &createForPosition(const IRPosition &IRP,
+                                                    Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAInstanceInfo"; }
@@ -4351,7 +4389,7 @@ struct AAInstanceInfo : public StateWrapper<BooleanState, AbstractAttribute> {
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for all nocapture attributes.
@@ -4363,15 +4401,15 @@ struct AANoCapture
   AANoCapture(const IRPosition &IRP, Attributor &A) : IRAttribute(IRP) {}
 
   /// See IRAttribute::isImpliedByIR
-  static bool isImpliedByIR(Attributor &A, const IRPosition &IRP,
-                            Attribute::AttrKind ImpliedAttributeKind,
-                            bool IgnoreSubsumingPositions = false);
+  LLVM_ABI static bool isImpliedByIR(Attributor &A, const IRPosition &IRP,
+                                     Attribute::AttrKind ImpliedAttributeKind,
+                                     bool IgnoreSubsumingPositions = false);
 
   /// Update \p State according to the capture capabilities of \p F for position
   /// \p IRP.
-  static void determineFunctionCaptureCapabilities(const IRPosition &IRP,
-                                                   const Function &F,
-                                                   BitIntegerState &State);
+  LLVM_ABI static void
+  determineFunctionCaptureCapabilities(const IRPosition &IRP, const Function &F,
+                                       BitIntegerState &State);
 
   /// See AbstractAttribute::isValidIRPositionForInit
   static bool isValidIRPositionForInit(Attributor &A, const IRPosition &IRP) {
@@ -4418,7 +4456,8 @@ struct AANoCapture
   }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANoCapture &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AANoCapture &createForPosition(const IRPosition &IRP,
+                                                 Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AANoCapture"; }
@@ -4432,7 +4471,7 @@ struct AANoCapture
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 struct ValueSimplifyStateType : public AbstractState {
@@ -4497,7 +4536,7 @@ struct ValueSimplifyStateType : public AbstractState {
   Type *Ty;
 
   /// Merge \p Other into the currently assumed simplified value
-  bool unionAssumed(std::optional<Value *> Other);
+  LLVM_ABI bool unionAssumed(std::optional<Value *> Other);
 
   /// Helper to track validity and fixpoint
   BooleanState BS;
@@ -4517,8 +4556,8 @@ struct AAValueSimplify
       : Base(IRP, IRP.getAssociatedType()) {}
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAValueSimplify &createForPosition(const IRPosition &IRP,
-                                            Attributor &A);
+  LLVM_ABI static AAValueSimplify &createForPosition(const IRPosition &IRP,
+                                                     Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAValueSimplify"; }
@@ -4533,7 +4572,7 @@ struct AAValueSimplify
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 
 private:
   /// Return an assumed simplified value if a single candidate is found. If
@@ -4559,7 +4598,8 @@ struct AAHeapToStack : public StateWrapper<BooleanState, AbstractAttribute> {
   virtual bool isAssumedHeapToStackRemovedFree(CallBase &CB) const = 0;
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAHeapToStack &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AAHeapToStack &createForPosition(const IRPosition &IRP,
+                                                   Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAHeapToStack"; }
@@ -4573,7 +4613,7 @@ struct AAHeapToStack : public StateWrapper<BooleanState, AbstractAttribute> {
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for privatizability.
@@ -4613,8 +4653,8 @@ struct AAPrivatizablePtr
   virtual std::optional<Type *> getPrivatizableType() const = 0;
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAPrivatizablePtr &createForPosition(const IRPosition &IRP,
-                                              Attributor &A);
+  LLVM_ABI static AAPrivatizablePtr &createForPosition(const IRPosition &IRP,
+                                                       Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAPrivatizablePtr"; }
@@ -4629,7 +4669,7 @@ struct AAPrivatizablePtr
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for memory access kind related attributes
@@ -4687,8 +4727,8 @@ struct AAMemoryBehavior
   bool isAssumedWriteOnly() const { return isAssumed(NO_READS); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAMemoryBehavior &createForPosition(const IRPosition &IRP,
-                                             Attributor &A);
+  LLVM_ABI static AAMemoryBehavior &createForPosition(const IRPosition &IRP,
+                                                      Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAMemoryBehavior"; }
@@ -4703,7 +4743,7 @@ struct AAMemoryBehavior
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for all memory location attributes
@@ -4845,7 +4885,7 @@ struct AAMemoryLocation
   };
 
   /// Return the locations encoded by \p MLK as a readable string.
-  static std::string getMemoryLocationsAsStr(MemoryLocationsKind MLK);
+  LLVM_ABI static std::string getMemoryLocationsAsStr(MemoryLocationsKind MLK);
 
   /// Simple enum to distinguish read/write/read-write accesses.
   enum AccessKind {
@@ -4867,8 +4907,8 @@ struct AAMemoryLocation
       MemoryLocationsKind MLK) const = 0;
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAMemoryLocation &createForPosition(const IRPosition &IRP,
-                                             Attributor &A);
+  LLVM_ABI static AAMemoryLocation &createForPosition(const IRPosition &IRP,
+                                                      Attributor &A);
 
   /// See AbstractState::getAsStr(Attributor).
   const std::string getAsStr(Attributor *A) const override {
@@ -4888,7 +4928,7 @@ struct AAMemoryLocation
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for range value analysis.
@@ -4913,8 +4953,8 @@ struct AAValueConstantRange
   const IntegerRangeState &getState() const override { return *this; }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAValueConstantRange &createForPosition(const IRPosition &IRP,
-                                                 Attributor &A);
+  LLVM_ABI static AAValueConstantRange &createForPosition(const IRPosition &IRP,
+                                                          Attributor &A);
 
   /// Return an assumed range for the associated value a program point \p CtxI.
   /// If \p I is nullptr, simply return an assumed range.
@@ -4956,7 +4996,7 @@ struct AAValueConstantRange
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// A class for a set state.
@@ -5231,9 +5271,10 @@ using PotentialConstantIntValuesState = PotentialValuesState<APInt>;
 using PotentialLLVMValuesState =
     PotentialValuesState<std::pair<AA::ValueAndContext, AA::ValueScope>>;
 
-raw_ostream &operator<<(raw_ostream &OS,
-                        const PotentialConstantIntValuesState &R);
-raw_ostream &operator<<(raw_ostream &OS, const PotentialLLVMValuesState &R);
+LLVM_ABI raw_ostream &operator<<(raw_ostream &OS,
+                                 const PotentialConstantIntValuesState &R);
+LLVM_ABI raw_ostream &operator<<(raw_ostream &OS,
+                                 const PotentialLLVMValuesState &R);
 
 /// An abstract interface for potential values analysis.
 ///
@@ -5272,8 +5313,8 @@ struct AAPotentialConstantValues
   }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAPotentialConstantValues &createForPosition(const IRPosition &IRP,
-                                                      Attributor &A);
+  LLVM_ABI static AAPotentialConstantValues &
+  createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// Return assumed constant for the associated value
   std::optional<Constant *>
@@ -5308,7 +5349,7 @@ struct AAPotentialConstantValues
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 struct AAPotentialValues
@@ -5324,13 +5365,14 @@ struct AAPotentialValues
   const PotentialLLVMValuesState &getState() const override { return *this; }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAPotentialValues &createForPosition(const IRPosition &IRP,
-                                              Attributor &A);
+  LLVM_ABI static AAPotentialValues &createForPosition(const IRPosition &IRP,
+                                                       Attributor &A);
 
   /// Extract the single value in \p Values if any.
-  static Value *getSingleValue(Attributor &A, const AbstractAttribute &AA,
-                               const IRPosition &IRP,
-                               SmallVectorImpl<AA::ValueAndContext> &Values);
+  LLVM_ABI static Value *
+  getSingleValue(Attributor &A, const AbstractAttribute &AA,
+                 const IRPosition &IRP,
+                 SmallVectorImpl<AA::ValueAndContext> &Values);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAPotentialValues"; }
@@ -5345,7 +5387,7 @@ struct AAPotentialValues
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 
 private:
   virtual bool getAssumedSimplifiedValues(
@@ -5369,9 +5411,9 @@ struct AANoUndef
   static bool isImpliedByPoison() { return false; }
 
   /// See IRAttribute::isImpliedByIR
-  static bool isImpliedByIR(Attributor &A, const IRPosition &IRP,
-                            Attribute::AttrKind ImpliedAttributeKind,
-                            bool IgnoreSubsumingPositions = false);
+  LLVM_ABI static bool isImpliedByIR(Attributor &A, const IRPosition &IRP,
+                                     Attribute::AttrKind ImpliedAttributeKind,
+                                     bool IgnoreSubsumingPositions = false);
 
   /// Return true if we assume that the underlying value is noundef.
   bool isAssumedNoUndef() const { return getAssumed(); }
@@ -5380,7 +5422,8 @@ struct AANoUndef
   bool isKnownNoUndef() const { return getKnown(); }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANoUndef &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AANoUndef &createForPosition(const IRPosition &IRP,
+                                               Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AANoUndef"; }
@@ -5394,7 +5437,7 @@ struct AANoUndef
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 struct AANoFPClass
@@ -5431,7 +5474,8 @@ struct AANoFPClass
   }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANoFPClass &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AANoFPClass &createForPosition(const IRPosition &IRP,
+                                                 Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AANoFPClass"; }
@@ -5445,7 +5489,7 @@ struct AANoFPClass
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 struct AACallGraphNode;
@@ -5461,7 +5505,7 @@ class AACallEdgeIterator
       : iterator_adaptor_base(Begin), A(A) {}
 
 public:
-  AACallGraphNode *operator*() const;
+  LLVM_ABI AACallGraphNode *operator*() const;
 
 private:
   Attributor &A;
@@ -5520,7 +5564,8 @@ struct AACallEdges : public StateWrapper<BooleanState, AbstractAttribute>,
   }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AACallEdges &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AACallEdges &createForPosition(const IRPosition &IRP,
+                                                 Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AACallEdges"; }
@@ -5534,7 +5579,7 @@ struct AACallEdges : public StateWrapper<BooleanState, AbstractAttribute>,
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 // Synthetic root node for the Attributor's internal call graph.
@@ -5558,7 +5603,7 @@ struct AttributorCallGraph : public AACallGraphNode {
     }
   }
 
-  void print();
+  LLVM_ABI void print();
 };
 
 template <> struct GraphTraits<AACallGraphNode *> {
@@ -5641,8 +5686,8 @@ struct AAExecutionDomain
   };
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAExecutionDomain &createForPosition(const IRPosition &IRP,
-                                              Attributor &A);
+  LLVM_ABI static AAExecutionDomain &createForPosition(const IRPosition &IRP,
+                                                       Attributor &A);
 
   /// See AbstractAttribute::getName().
   StringRef getName() const override { return "AAExecutionDomain"; }
@@ -5682,7 +5727,7 @@ struct AAExecutionDomain
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract Attribute for computing reachability between functions.
@@ -5707,8 +5752,8 @@ struct AAInterFnReachability
       const AA::InstExclusionSetTy *ExclusionSet = nullptr) const = 0;
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAInterFnReachability &createForPosition(const IRPosition &IRP,
-                                                  Attributor &A);
+  LLVM_ABI static AAInterFnReachability &
+  createForPosition(const IRPosition &IRP, Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAInterFnReachability"; }
@@ -5722,7 +5767,7 @@ struct AAInterFnReachability
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract Attribute for determining the necessity of the convergent
@@ -5733,8 +5778,8 @@ struct AANonConvergent : public StateWrapper<BooleanState, AbstractAttribute> {
   AANonConvergent(const IRPosition &IRP, Attributor &A) : Base(IRP) {}
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AANonConvergent &createForPosition(const IRPosition &IRP,
-                                            Attributor &A);
+  LLVM_ABI static AANonConvergent &createForPosition(const IRPosition &IRP,
+                                                     Attributor &A);
 
   /// Return true if "non-convergent" is assumed.
   bool isAssumedNotConvergent() const { return getAssumed(); }
@@ -5755,7 +5800,7 @@ struct AANonConvergent : public StateWrapper<BooleanState, AbstractAttribute> {
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for struct information.
@@ -6163,7 +6208,8 @@ struct AAPointerInfo : public AbstractAttribute {
   };
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAPointerInfo &createForPosition(const IRPosition &IRP, Attributor &A);
+  LLVM_ABI static AAPointerInfo &createForPosition(const IRPosition &IRP,
+                                                   Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAPointerInfo"; }
@@ -6208,10 +6254,10 @@ struct AAPointerInfo : public AbstractAttribute {
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
-raw_ostream &operator<<(raw_ostream &, const AAPointerInfo::Access &);
+LLVM_ABI raw_ostream &operator<<(raw_ostream &, const AAPointerInfo::Access &);
 
 /// An abstract attribute for getting assumption information.
 struct AAAssumptionInfo
@@ -6228,8 +6274,8 @@ struct AAAssumptionInfo
   virtual bool hasAssumption(const StringRef Assumption) const = 0;
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAAssumptionInfo &createForPosition(const IRPosition &IRP,
-                                             Attributor &A);
+  LLVM_ABI static AAAssumptionInfo &createForPosition(const IRPosition &IRP,
+                                                      Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAAssumptionInfo"; }
@@ -6244,7 +6290,7 @@ struct AAAssumptionInfo
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract attribute for getting all assumption underlying objects.
@@ -6262,8 +6308,8 @@ struct AAUnderlyingObjects : AbstractAttribute {
   static bool requiresCallersForArgOrFunction() { return true; }
 
   /// Create an abstract attribute biew for the position \p IRP.
-  static AAUnderlyingObjects &createForPosition(const IRPosition &IRP,
-                                                Attributor &A);
+  LLVM_ABI static AAUnderlyingObjects &createForPosition(const IRPosition &IRP,
+                                                         Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAUnderlyingObjects"; }
@@ -6278,7 +6324,7 @@ struct AAUnderlyingObjects : AbstractAttribute {
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 
   /// Check \p Pred on all underlying objects in \p Scope collected so far.
   ///
@@ -6310,8 +6356,8 @@ struct AAAddressSpace : public StateWrapper<BooleanState, AbstractAttribute> {
   virtual uint32_t getAddressSpace() const = 0;
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAAddressSpace &createForPosition(const IRPosition &IRP,
-                                           Attributor &A);
+  LLVM_ABI static AAAddressSpace &createForPosition(const IRPosition &IRP,
+                                                    Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AAAddressSpace"; }
@@ -6326,7 +6372,7 @@ struct AAAddressSpace : public StateWrapper<BooleanState, AbstractAttribute> {
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 
 protected:
   // Invalid address space which indicates the associated value is dead.
@@ -6345,8 +6391,8 @@ struct AAAllocationInfo : public StateWrapper<BooleanState, AbstractAttribute> {
   }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAAllocationInfo &createForPosition(const IRPosition &IRP,
-                                             Attributor &A);
+  LLVM_ABI static AAAllocationInfo &createForPosition(const IRPosition &IRP,
+                                                      Attributor &A);
 
   virtual std::optional<TypeSize> getAllocatedSize() const = 0;
 
@@ -6365,7 +6411,7 @@ struct AAAllocationInfo : public StateWrapper<BooleanState, AbstractAttribute> {
   constexpr static const std::optional<TypeSize> HasNoAllocationSize =
       std::optional<TypeSize>(TypeSize(-1, true));
 
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for llvm::GlobalValue information interference.
@@ -6385,8 +6431,8 @@ struct AAGlobalValueInfo
   }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAGlobalValueInfo &createForPosition(const IRPosition &IRP,
-                                              Attributor &A);
+  LLVM_ABI static AAGlobalValueInfo &createForPosition(const IRPosition &IRP,
+                                                       Attributor &A);
 
   /// Return true iff \p U is a potential use of the associated global value.
   virtual bool isPotentialUse(const Use &U) const = 0;
@@ -6404,7 +6450,7 @@ struct AAGlobalValueInfo
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract interface for indirect call information interference.
@@ -6423,8 +6469,8 @@ struct AAIndirectCallInfo
   }
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AAIndirectCallInfo &createForPosition(const IRPosition &IRP,
-                                               Attributor &A);
+  LLVM_ABI static AAIndirectCallInfo &createForPosition(const IRPosition &IRP,
+                                                        Attributor &A);
 
   /// Call \CB on each potential callee value and return true if all were known
   /// and \p CB returned true on all of them. Otherwise, return false.
@@ -6445,7 +6491,7 @@ struct AAIndirectCallInfo
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
 /// An abstract Attribute for specializing "dynamic" components of
@@ -6457,8 +6503,8 @@ struct AADenormalFPMath
   AADenormalFPMath(const IRPosition &IRP, Attributor &A) : Base(IRP) {}
 
   /// Create an abstract attribute view for the position \p IRP.
-  static AADenormalFPMath &createForPosition(const IRPosition &IRP,
-                                             Attributor &A);
+  LLVM_ABI static AADenormalFPMath &createForPosition(const IRPosition &IRP,
+                                                      Attributor &A);
 
   /// See AbstractAttribute::getName()
   StringRef getName() const override { return "AADenormalFPMath"; }
@@ -6473,11 +6519,9 @@ struct AADenormalFPMath
   }
 
   /// Unique ID (due to the unique address)
-  static const char ID;
+  LLVM_ABI static const char ID;
 };
 
-raw_ostream &operator<<(raw_ostream &, const AAPointerInfo::Access &);
-
 /// Run options, used by the pass manager.
 enum AttributorRunOption {
   NONE = 0,
diff --git a/llvm/include/llvm/Transforms/IPO/BlockExtractor.h b/llvm/include/llvm/Transforms/IPO/BlockExtractor.h
index cf6b1666b4fc6..2f8db6f32818c 100644
--- a/llvm/include/llvm/Transforms/IPO/BlockExtractor.h
+++ b/llvm/include/llvm/Transforms/IPO/BlockExtractor.h
@@ -14,6 +14,7 @@
 #ifndef LLVM_TRANSFORMS_IPO_BLOCKEXTRACTOR_H
 #define LLVM_TRANSFORMS_IPO_BLOCKEXTRACTOR_H
 
+#include "llvm/Support/Compiler.h"
 #include <vector>
 
 #include "llvm/IR/PassManager.h"
@@ -22,9 +23,10 @@ namespace llvm {
 class BasicBlock;
 
 struct BlockExtractorPass : PassInfoMixin<BlockExtractorPass> {
+  LLVM_ABI
   BlockExtractorPass(std::vector<std::vector<BasicBlock *>> &&GroupsOfBlocks,
                      bool EraseFunctions);
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 
 private:
   std::vector<std::vector<BasicBlock *>> GroupsOfBlocks;
diff --git a/llvm/include/llvm/Transforms/IPO/EmbedBitcodePass.h b/llvm/include/llvm/Transforms/IPO/EmbedBitcodePass.h
index 12bf0dd6581ce..dcd6d5f446c03 100644
--- a/llvm/include/llvm/Transforms/IPO/EmbedBitcodePass.h
+++ b/llvm/include/llvm/Transforms/IPO/EmbedBitcodePass.h
@@ -19,6 +19,7 @@
 #define LLVM_TRANSFORMS_IPO_EMBEDBITCODEPASS_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class Module;
@@ -44,7 +45,7 @@ class EmbedBitcodePass : public PassInfoMixin<EmbedBitcodePass> {
   EmbedBitcodePass(bool IsThinLTO, bool EmitLTOSummary)
       : IsThinLTO(IsThinLTO), EmitLTOSummary(EmitLTOSummary) {}
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
 
   static bool isRequired() { return true; }
 };
diff --git a/llvm/include/llvm/Transforms/IPO/ExtractGV.h b/llvm/include/llvm/Transforms/IPO/ExtractGV.h
index 1c2e7d9465fd6..eed7dfb8b6a14 100644
--- a/llvm/include/llvm/Transforms/IPO/ExtractGV.h
+++ b/llvm/include/llvm/Transforms/IPO/ExtractGV.h
@@ -11,6 +11,7 @@
 
 #include "llvm/ADT/SetVector.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class GlobalValue;
@@ -22,9 +23,9 @@ class ExtractGVPass : public PassInfoMixin<ExtractGVPass> {
   bool keepConstInit;
 
 public:
-  ExtractGVPass(std::vector<GlobalValue *> &GVs, bool deleteS = true,
-                bool keepConstInit = false);
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
+  LLVM_ABI ExtractGVPass(std::vector<GlobalValue *> &GVs, bool deleteS = true,
+                         bool keepConstInit = false);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
 };
 } // namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/IPO/FunctionAttrs.h b/llvm/include/llvm/Transforms/IPO/FunctionAttrs.h
index 6a21ff616d506..754714dceb7a6 100644
--- a/llvm/include/llvm/Transforms/IPO/FunctionAttrs.h
+++ b/llvm/include/llvm/Transforms/IPO/FunctionAttrs.h
@@ -19,6 +19,7 @@
 #include "llvm/Analysis/CGSCCPassManager.h"
 #include "llvm/Analysis/LazyCallGraph.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -28,11 +29,12 @@ class Function;
 class Module;
 
 /// Returns the memory access properties of this copy of the function.
-MemoryEffects computeFunctionBodyMemoryAccess(Function &F, AAResults &AAR);
+LLVM_ABI MemoryEffects computeFunctionBodyMemoryAccess(Function &F,
+                                                       AAResults &AAR);
 
 /// Propagate function attributes for function summaries along the index's
 /// callgraph during thinlink
-bool thinLTOPropagateFunctionAttrs(
+LLVM_ABI bool thinLTOPropagateFunctionAttrs(
     ModuleSummaryIndex &Index,
     function_ref<bool(GlobalValue::GUID, const GlobalValueSummary *)>
         isPrevailing);
@@ -49,11 +51,13 @@ bool thinLTOPropagateFunctionAttrs(
 struct PostOrderFunctionAttrsPass : PassInfoMixin<PostOrderFunctionAttrsPass> {
   PostOrderFunctionAttrsPass(bool SkipNonRecursive = false)
       : SkipNonRecursive(SkipNonRecursive) {}
-  PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
-                        LazyCallGraph &CG, CGSCCUpdateResult &UR);
+  LLVM_ABI PreservedAnalyses run(LazyCallGraph::SCC &C,
+                                 CGSCCAnalysisManager &AM, LazyCallGraph &CG,
+                                 CGSCCUpdateResult &UR);
 
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
 private:
   bool SkipNonRecursive;
@@ -72,7 +76,7 @@ struct PostOrderFunctionAttrsPass : PassInfoMixin<PostOrderFunctionAttrsPass> {
 class ReversePostOrderFunctionAttrsPass
     : public PassInfoMixin<ReversePostOrderFunctionAttrsPass> {
 public:
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/Transforms/IPO/FunctionImport.h b/llvm/include/llvm/Transforms/IPO/FunctionImport.h
index 5e4116834b7f2..65228bb65ba8b 100644
--- a/llvm/include/llvm/Transforms/IPO/FunctionImport.h
+++ b/llvm/include/llvm/Transforms/IPO/FunctionImport.h
@@ -15,6 +15,7 @@
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/IR/ModuleSummaryIndex.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Error.h"
 #include <functional>
 #include <memory>
@@ -199,13 +200,14 @@ class FunctionImporter {
 
     // Add the given GUID to ImportList as a definition.  If the same GUID has
     // been added as a declaration previously, that entry is overridden.
-    AddDefinitionStatus addDefinition(StringRef FromModule,
-                                      GlobalValue::GUID GUID);
+    LLVM_ABI AddDefinitionStatus addDefinition(StringRef FromModule,
+                                               GlobalValue::GUID GUID);
 
     // Add the given GUID to ImportList as a declaration.  If the same GUID has
     // been added as a definition previously, that entry takes precedence, and
     // no change is made.
-    void maybeAddDeclaration(StringRef FromModule, GlobalValue::GUID GUID);
+    LLVM_ABI void maybeAddDeclaration(StringRef FromModule,
+                                      GlobalValue::GUID GUID);
 
     void addGUID(StringRef FromModule, GlobalValue::GUID GUID,
                  GlobalValueSummary::ImportKind ImportKind) {
@@ -217,9 +219,9 @@ class FunctionImporter {
 
     // Return the list of source modules sorted in the ascending alphabetical
     // order.
-    SmallVector<StringRef, 0> getSourceModules() const;
+    LLVM_ABI SmallVector<StringRef, 0> getSourceModules() const;
 
-    std::optional<GlobalValueSummary::ImportKind>
+    LLVM_ABI std::optional<GlobalValueSummary::ImportKind>
     getImportType(StringRef FromModule, GlobalValue::GUID GUID) const;
 
     // Iterate over the import list.  The caller gets tuples of FromModule,
@@ -312,7 +314,8 @@ class FunctionImporter {
         ClearDSOLocalOnDeclarations(ClearDSOLocalOnDeclarations) {}
 
   /// Import functions in Module \p M based on the supplied import list.
-  Expected<bool> importFunctions(Module &M, const ImportMapTy &ImportList);
+  LLVM_ABI Expected<bool> importFunctions(Module &M,
+                                          const ImportMapTy &ImportList);
 
 private:
   /// The summaries index used to trigger importing.
@@ -329,7 +332,7 @@ class FunctionImporter {
 /// The function importing pass
 class FunctionImportPass : public PassInfoMixin<FunctionImportPass> {
 public:
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 /// Compute all the imports and exports for every module in the Index.
@@ -353,7 +356,7 @@ class FunctionImportPass : public PassInfoMixin<FunctionImportPass> {
 /// are owned by the in-memory ModuleSummaryIndex the importing decisions
 /// are made from (the module path for each summary is owned by the index's
 /// module path string table).
-void ComputeCrossModuleImport(
+LLVM_ABI void ComputeCrossModuleImport(
     const ModuleSummaryIndex &Index,
     const DenseMap<StringRef, GVSummaryMapTy> &ModuleToDefinedGVSummaries,
     function_ref<bool(GlobalValue::GUID, const GlobalValueSummary *)>
@@ -370,7 +373,7 @@ enum class PrevailingType { Yes, No, Unknown };
 /// SamplePGO when needed. Normally this is done during
 /// computeDeadSymbolsAndUpdateIndirectCalls, but can be called standalone
 /// when that is not called (e.g. during testing).
-void updateIndirectCalls(ModuleSummaryIndex &Index);
+LLVM_ABI void updateIndirectCalls(ModuleSummaryIndex &Index);
 
 /// Compute all the symbols that are "dead": i.e these that can't be reached
 /// in the graph from any of the given symbols listed in
@@ -379,14 +382,14 @@ void updateIndirectCalls(ModuleSummaryIndex &Index);
 /// predicate returns status of symbol.
 /// Also update call edges for indirect calls to local functions added from
 /// SamplePGO when needed.
-void computeDeadSymbolsAndUpdateIndirectCalls(
+LLVM_ABI void computeDeadSymbolsAndUpdateIndirectCalls(
     ModuleSummaryIndex &Index,
     const DenseSet<GlobalValue::GUID> &GUIDPreservedSymbols,
     function_ref<PrevailingType(GlobalValue::GUID)> isPrevailing);
 
 /// Compute dead symbols and run constant propagation in combined index
 /// after that.
-void computeDeadSymbolsWithConstProp(
+LLVM_ABI void computeDeadSymbolsWithConstProp(
     ModuleSummaryIndex &Index,
     const DenseSet<GlobalValue::GUID> &GUIDPreservedSymbols,
     function_ref<PrevailingType(GlobalValue::GUID)> isPrevailing,
@@ -394,7 +397,7 @@ void computeDeadSymbolsWithConstProp(
 
 /// Converts value \p GV to declaration, or replaces with a declaration if
 /// it is an alias. Returns true if converted, false if replaced.
-bool convertToDeclaration(GlobalValue &GV);
+LLVM_ABI bool convertToDeclaration(GlobalValue &GV);
 
 /// Compute the set of summaries needed for a ThinLTO backend compilation of
 /// \p ModulePath.
@@ -409,7 +412,7 @@ bool convertToDeclaration(GlobalValue &GV);
 ///
 /// \p DecSummaries will be popluated with the subset of of summary pointers
 /// that have 'declaration' import type among all summaries the module need.
-void gatherImportedSummariesForModule(
+LLVM_ABI void gatherImportedSummariesForModule(
     StringRef ModulePath,
     const DenseMap<StringRef, GVSummaryMapTy> &ModuleToDefinedGVSummaries,
     const FunctionImporter::ImportMapTy &ImportList,
@@ -417,12 +420,12 @@ void gatherImportedSummariesForModule(
     GVSummaryPtrSet &DecSummaries);
 
 /// Emit into \p OutputFilename the files module \p ModulePath will import from.
-Error EmitImportsFiles(
-    StringRef ModulePath, StringRef OutputFilename,
-    const ModuleToSummariesForIndexTy &ModuleToSummariesForIndex);
+LLVM_ABI Error
+EmitImportsFiles(StringRef ModulePath, StringRef OutputFilename,
+                 const ModuleToSummariesForIndexTy &ModuleToSummariesForIndex);
 
 /// Call \p F passing each of the files module \p ModulePath will import from.
-void processImportsFiles(
+LLVM_ABI void processImportsFiles(
     StringRef ModulePath,
     const ModuleToSummariesForIndexTy &ModuleToSummariesForIndex,
     function_ref<void(const std::string &)> F);
@@ -433,14 +436,14 @@ void processImportsFiles(
 ///    and consider visibility from other definitions for ELF) in \p TheModule
 /// 2. (optional) Apply propagated function attributes to \p TheModule if
 ///    PropagateAttrs is true
-void thinLTOFinalizeInModule(Module &TheModule,
-                             const GVSummaryMapTy &DefinedGlobals,
-                             bool PropagateAttrs);
+LLVM_ABI void thinLTOFinalizeInModule(Module &TheModule,
+                                      const GVSummaryMapTy &DefinedGlobals,
+                                      bool PropagateAttrs);
 
 /// Internalize \p TheModule based on the information recorded in the summaries
 /// during global summary-based analysis.
-void thinLTOInternalizeModule(Module &TheModule,
-                              const GVSummaryMapTy &DefinedGlobals);
+LLVM_ABI void thinLTOInternalizeModule(Module &TheModule,
+                                       const GVSummaryMapTy &DefinedGlobals);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/IPO/FunctionSpecialization.h b/llvm/include/llvm/Transforms/IPO/FunctionSpecialization.h
index d15a3d777ab0e..1575afa50e198 100644
--- a/llvm/include/llvm/Transforms/IPO/FunctionSpecialization.h
+++ b/llvm/include/llvm/Transforms/IPO/FunctionSpecialization.h
@@ -86,6 +86,7 @@
 #include "llvm/Analysis/InlineCost.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/IR/InstVisitor.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Scalar/SCCP.h"
 #include "llvm/Transforms/Utils/Cloning.h"
 #include "llvm/Transforms/Utils/SCCPSolver.h"
@@ -179,11 +180,11 @@ class InstCostVisitor : public InstVisitor<InstCostVisitor, Constant *> {
     return Solver.isBlockExecutable(BB) && !DeadBlocks.contains(BB);
   }
 
-  Cost getCodeSizeSavingsForArg(Argument *A, Constant *C);
+  LLVM_ABI Cost getCodeSizeSavingsForArg(Argument *A, Constant *C);
 
-  Cost getCodeSizeSavingsFromPendingPHIs();
+  LLVM_ABI Cost getCodeSizeSavingsFromPendingPHIs();
 
-  Cost getLatencySavingsForKnownConstants();
+  LLVM_ABI Cost getLatencySavingsForKnownConstants();
 
 private:
   friend class InstVisitor<InstCostVisitor, Constant *>;
@@ -260,9 +261,9 @@ class FunctionSpecializer {
       : Solver(Solver), M(M), FAM(FAM), GetBFI(GetBFI), GetTLI(GetTLI),
         GetTTI(GetTTI), GetAC(GetAC) {}
 
-  ~FunctionSpecializer();
+  LLVM_ABI ~FunctionSpecializer();
 
-  bool run();
+  LLVM_ABI bool run();
 
   InstCostVisitor getInstCostVisitorFor(Function *F) {
     auto &TTI = GetTTI(*F);
diff --git a/llvm/include/llvm/Transforms/IPO/GlobalDCE.h b/llvm/include/llvm/Transforms/IPO/GlobalDCE.h
index 92c30d4b54a26..f8f775b8ea96e 100644
--- a/llvm/include/llvm/Transforms/IPO/GlobalDCE.h
+++ b/llvm/include/llvm/Transforms/IPO/GlobalDCE.h
@@ -21,6 +21,7 @@
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include <unordered_map>
 
 namespace llvm {
@@ -37,10 +38,11 @@ class GlobalDCEPass : public PassInfoMixin<GlobalDCEPass> {
 public:
   GlobalDCEPass(bool InLTOPostLink = false) : InLTOPostLink(InLTOPostLink) {}
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
 
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
 private:
   bool InLTOPostLink = false;
diff --git a/llvm/include/llvm/Transforms/IPO/Inliner.h b/llvm/include/llvm/Transforms/IPO/Inliner.h
index 401aa2d3a0cc6..dd877b5cdc724 100644
--- a/llvm/include/llvm/Transforms/IPO/Inliner.h
+++ b/llvm/include/llvm/Transforms/IPO/Inliner.h
@@ -15,6 +15,7 @@
 #include "llvm/Analysis/LazyCallGraph.h"
 #include "llvm/Analysis/Utils/ImportedFunctionsInliningStatistics.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -39,11 +40,13 @@ class InlinerPass : public PassInfoMixin<InlinerPass> {
       : OnlyMandatory(OnlyMandatory), LTOPhase(LTOPhase) {}
   InlinerPass(InlinerPass &&Arg) = default;
 
-  PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
-                        LazyCallGraph &CG, CGSCCUpdateResult &UR);
+  LLVM_ABI PreservedAnalyses run(LazyCallGraph::SCC &C,
+                                 CGSCCAnalysisManager &AM, LazyCallGraph &CG,
+                                 CGSCCUpdateResult &UR);
 
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
 private:
   InlineAdvisor &getAdvisor(const ModuleAnalysisManagerCGSCCProxy::Result &MAM,
@@ -61,14 +64,14 @@ class InlinerPass : public PassInfoMixin<InlinerPass> {
 class ModuleInlinerWrapperPass
     : public PassInfoMixin<ModuleInlinerWrapperPass> {
 public:
-  ModuleInlinerWrapperPass(
+  LLVM_ABI ModuleInlinerWrapperPass(
       InlineParams Params = getInlineParams(), bool MandatoryFirst = true,
       InlineContext IC = {},
       InliningAdvisorMode Mode = InliningAdvisorMode::Default,
       unsigned MaxDevirtIterations = 0);
   ModuleInlinerWrapperPass(ModuleInlinerWrapperPass &&Arg) = default;
 
-  PreservedAnalyses run(Module &, ModuleAnalysisManager &);
+  LLVM_ABI PreservedAnalyses run(Module &, ModuleAnalysisManager &);
 
   /// Allow adding more CGSCC passes, besides inlining. This should be called
   /// before run is called, as part of pass pipeline building.
@@ -84,8 +87,9 @@ class ModuleInlinerWrapperPass
     AfterCGMPM.addPass(std::move(Pass));
   }
 
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
 private:
   const InlineParams Params;
diff --git a/llvm/include/llvm/Transforms/IPO/Internalize.h b/llvm/include/llvm/Transforms/IPO/Internalize.h
index c9b2d3ba2d71a..9d13f09d7d81d 100644
--- a/llvm/include/llvm/Transforms/IPO/Internalize.h
+++ b/llvm/include/llvm/Transforms/IPO/Internalize.h
@@ -24,6 +24,7 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/StringSet.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include <functional>
 
 namespace llvm {
@@ -61,15 +62,15 @@ class InternalizePass : public PassInfoMixin<InternalizePass> {
                    DenseMap<const Comdat *, ComdatInfo> &ComdatMap);
 
 public:
-  InternalizePass();
+  LLVM_ABI InternalizePass();
   InternalizePass(std::function<bool(const GlobalValue &)> MustPreserveGV)
       : MustPreserveGV(std::move(MustPreserveGV)) {}
 
   /// Run the internalizer on \p TheModule, returns true if any changes was
   /// made.
-  bool internalizeModule(Module &TheModule);
+  LLVM_ABI bool internalizeModule(Module &TheModule);
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 /// Helper function to internalize functions and variables in a Module.
diff --git a/llvm/include/llvm/Transforms/IPO/LowerTypeTests.h b/llvm/include/llvm/Transforms/IPO/LowerTypeTests.h
index 40f2d2c4fadf7..253d13f81857b 100644
--- a/llvm/include/llvm/Transforms/IPO/LowerTypeTests.h
+++ b/llvm/include/llvm/Transforms/IPO/LowerTypeTests.h
@@ -16,6 +16,7 @@
 
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include <cstdint>
 #include <cstring>
 #include <limits>
@@ -53,9 +54,9 @@ struct BitSetInfo {
     return Bits.size() == BitSize;
   }
 
-  bool containsGlobalOffset(uint64_t Offset) const;
+  LLVM_ABI bool containsGlobalOffset(uint64_t Offset) const;
 
-  void print(raw_ostream &OS) const;
+  LLVM_ABI void print(raw_ostream &OS) const;
 };
 
 struct BitSetBuilder {
@@ -74,7 +75,7 @@ struct BitSetBuilder {
     Offsets.push_back(Offset);
   }
 
-  BitSetInfo build();
+  LLVM_ABI BitSetInfo build();
 };
 
 /// This class implements a layout algorithm for globals referenced by bit sets
@@ -137,7 +138,7 @@ struct GlobalLayoutBuilder {
   /// Add F to the layout while trying to keep its indices contiguous.
   /// If a previously seen fragment uses any of F's indices, that
   /// fragment will be laid out inside F.
-  void addFragment(const std::set<uint64_t> &F);
+  LLVM_ABI void addFragment(const std::set<uint64_t> &F);
 };
 
 /// This class is used to build a byte array containing overlapping bit sets. By
@@ -189,11 +190,11 @@ struct ByteArrayBuilder {
   /// AllocMask is set to the bitmask for those bits. This uses the LPT (Longest
   /// Processing Time) multiprocessor scheduling algorithm to lay out the bits
   /// efficiently; the pass allocates bit sets in decreasing size order.
-  void allocate(const std::set<uint64_t> &Bits, uint64_t BitSize,
-                uint64_t &AllocByteOffset, uint8_t &AllocMask);
+  LLVM_ABI void allocate(const std::set<uint64_t> &Bits, uint64_t BitSize,
+                         uint64_t &AllocByteOffset, uint8_t &AllocMask);
 };
 
-bool isJumpTableCanonical(Function *F);
+LLVM_ABI bool isJumpTableCanonical(Function *F);
 
 /// Specifies how to drop type tests.
 enum class DropTestKind {
@@ -220,12 +221,12 @@ class LowerTypeTestsPass : public PassInfoMixin<LowerTypeTestsPass> {
                          lowertypetests::DropTestKind::None)
       : ExportSummary(ExportSummary), ImportSummary(ImportSummary),
         DropTypeTests(DropTypeTests) {}
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 class SimplifyTypeTestsPass : public PassInfoMixin<SimplifyTypeTestsPass> {
 public:
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/Transforms/IPO/MergeFunctions.h b/llvm/include/llvm/Transforms/IPO/MergeFunctions.h
index 71f175c6472b4..559d5a77618ad 100644
--- a/llvm/include/llvm/Transforms/IPO/MergeFunctions.h
+++ b/llvm/include/llvm/Transforms/IPO/MergeFunctions.h
@@ -16,6 +16,7 @@
 #define LLVM_TRANSFORMS_IPO_MERGEFUNCTIONS_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -25,10 +26,10 @@ class Function;
 /// Merge identical functions.
 class MergeFunctionsPass : public PassInfoMixin<MergeFunctionsPass> {
 public:
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 
-  static bool runOnModule(Module &M);
-  static DenseMap<Function *, Function *>
+  LLVM_ABI static bool runOnModule(Module &M);
+  LLVM_ABI static DenseMap<Function *, Function *>
   runOnFunctions(ArrayRef<Function *> F);
 };
 
diff --git a/llvm/include/llvm/Transforms/IPO/ModuleInliner.h b/llvm/include/llvm/Transforms/IPO/ModuleInliner.h
index 24cfff6083ffb..6b09d18ee81c1 100644
--- a/llvm/include/llvm/Transforms/IPO/ModuleInliner.h
+++ b/llvm/include/llvm/Transforms/IPO/ModuleInliner.h
@@ -12,6 +12,7 @@
 #include "llvm/Analysis/InlineAdvisor.h"
 #include "llvm/Analysis/InlineCost.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -32,7 +33,7 @@ class ModuleInlinerPass : public PassInfoMixin<ModuleInlinerPass> {
       : Params(Params), Mode(Mode), LTOPhase(LTOPhase){};
   ModuleInlinerPass(ModuleInlinerPass &&Arg) = default;
 
-  PreservedAnalyses run(Module &, ModuleAnalysisManager &);
+  LLVM_ABI PreservedAnalyses run(Module &, ModuleAnalysisManager &);
 
 private:
   InlineAdvisor &getAdvisor(const ModuleAnalysisManager &MAM,
diff --git a/llvm/include/llvm/Transforms/IPO/SampleContextTracker.h b/llvm/include/llvm/Transforms/IPO/SampleContextTracker.h
index 626a7a09084e4..1fececbef2adc 100644
--- a/llvm/include/llvm/Transforms/IPO/SampleContextTracker.h
+++ b/llvm/include/llvm/Transforms/IPO/SampleContextTracker.h
@@ -18,6 +18,7 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/iterator.h"
 #include "llvm/ProfileData/SampleProf.h"
+#include "llvm/Support/Compiler.h"
 #include <map>
 #include <queue>
 #include <vector>
@@ -39,25 +40,27 @@ class ContextTrieNode {
                   LineLocation CallLoc = {0, 0})
       : ParentContext(Parent), FuncName(FName), FuncSamples(FSamples),
         CallSiteLoc(CallLoc){};
-  ContextTrieNode *getChildContext(const LineLocation &CallSite,
+  LLVM_ABI ContextTrieNode *getChildContext(const LineLocation &CallSite,
+                                            FunctionId ChildName);
+  LLVM_ABI ContextTrieNode *
+  getHottestChildContext(const LineLocation &CallSite);
+  LLVM_ABI ContextTrieNode *
+  getOrCreateChildContext(const LineLocation &CallSite, FunctionId ChildName,
+                          bool AllowCreate = true);
+  LLVM_ABI void removeChildContext(const LineLocation &CallSite,
                                    FunctionId ChildName);
-  ContextTrieNode *getHottestChildContext(const LineLocation &CallSite);
-  ContextTrieNode *getOrCreateChildContext(const LineLocation &CallSite,
-                                           FunctionId ChildName,
-                                           bool AllowCreate = true);
-  void removeChildContext(const LineLocation &CallSite, FunctionId ChildName);
-  std::map<uint64_t, ContextTrieNode> &getAllChildContext();
-  FunctionId getFuncName() const;
-  FunctionSamples *getFunctionSamples() const;
-  void setFunctionSamples(FunctionSamples *FSamples);
-  std::optional<uint32_t> getFunctionSize() const;
-  void addFunctionSize(uint32_t FSize);
-  LineLocation getCallSiteLoc() const;
-  ContextTrieNode *getParentContext() const;
-  void setParentContext(ContextTrieNode *Parent);
-  void setCallSiteLoc(const LineLocation &Loc);
-  void dumpNode();
-  void dumpTree();
+  LLVM_ABI std::map<uint64_t, ContextTrieNode> &getAllChildContext();
+  LLVM_ABI FunctionId getFuncName() const;
+  LLVM_ABI FunctionSamples *getFunctionSamples() const;
+  LLVM_ABI void setFunctionSamples(FunctionSamples *FSamples);
+  LLVM_ABI std::optional<uint32_t> getFunctionSize() const;
+  LLVM_ABI void addFunctionSize(uint32_t FSize);
+  LLVM_ABI LineLocation getCallSiteLoc() const;
+  LLVM_ABI ContextTrieNode *getParentContext() const;
+  LLVM_ABI void setParentContext(ContextTrieNode *Parent);
+  LLVM_ABI void setCallSiteLoc(const LineLocation &Loc);
+  LLVM_ABI void dumpNode();
+  LLVM_ABI void dumpTree();
 
 private:
   // Map line+discriminator location to child context
@@ -91,48 +94,51 @@ class SampleContextTracker {
   using ContextSamplesTy = std::vector<FunctionSamples *>;
 
   SampleContextTracker() = default;
+  LLVM_ABI
   SampleContextTracker(SampleProfileMap &Profiles,
                        const DenseMap<uint64_t, StringRef> *GUIDToFuncNameMap);
   // Populate the FuncToCtxtProfiles map after the trie is built.
-  void populateFuncToCtxtMap();
+  LLVM_ABI void populateFuncToCtxtMap();
   // Query context profile for a specific callee with given name at a given
   // call-site. The full context is identified by location of call instruction.
-  FunctionSamples *getCalleeContextSamplesFor(const CallBase &Inst,
-                                              StringRef CalleeName);
+  LLVM_ABI FunctionSamples *getCalleeContextSamplesFor(const CallBase &Inst,
+                                                       StringRef CalleeName);
   // Get samples for indirect call targets for call site at given location.
-  std::vector<const FunctionSamples *>
+  LLVM_ABI std::vector<const FunctionSamples *>
   getIndirectCalleeContextSamplesFor(const DILocation *DIL);
   // Query context profile for a given location. The full context
   // is identified by input DILocation.
-  FunctionSamples *getContextSamplesFor(const DILocation *DIL);
+  LLVM_ABI FunctionSamples *getContextSamplesFor(const DILocation *DIL);
   // Query context profile for a given sample contxt of a function.
-  FunctionSamples *getContextSamplesFor(const SampleContext &Context);
+  LLVM_ABI FunctionSamples *getContextSamplesFor(const SampleContext &Context);
   // Get all context profile for given function.
-  ContextSamplesTy &getAllContextSamplesFor(const Function &Func);
-  ContextSamplesTy &getAllContextSamplesFor(StringRef Name);
-  ContextTrieNode *getOrCreateContextPath(const SampleContext &Context,
-                                          bool AllowCreate);
+  LLVM_ABI ContextSamplesTy &getAllContextSamplesFor(const Function &Func);
+  LLVM_ABI ContextSamplesTy &getAllContextSamplesFor(StringRef Name);
+  LLVM_ABI ContextTrieNode *getOrCreateContextPath(const SampleContext &Context,
+                                                   bool AllowCreate);
   // Query base profile for a given function. A base profile is a merged view
   // of all context profiles for contexts that are not inlined.
-  FunctionSamples *getBaseSamplesFor(const Function &Func,
-                                     bool MergeContext = true);
+  LLVM_ABI FunctionSamples *getBaseSamplesFor(const Function &Func,
+                                              bool MergeContext = true);
   // Query base profile for a given function by name.
-  FunctionSamples *getBaseSamplesFor(FunctionId Name,
-                                     bool MergeContext = true);
+  LLVM_ABI FunctionSamples *getBaseSamplesFor(FunctionId Name,
+                                              bool MergeContext = true);
   // Retrieve the context trie node for given profile context
-  ContextTrieNode *getContextFor(const SampleContext &Context);
+  LLVM_ABI ContextTrieNode *getContextFor(const SampleContext &Context);
   // Get real function name for a given trie node.
-  StringRef getFuncNameFor(ContextTrieNode *Node) const;
+  LLVM_ABI StringRef getFuncNameFor(ContextTrieNode *Node) const;
   // Mark a context profile as inlined when function is inlined.
   // This makes sure that inlined context profile will be excluded in
   // function's base profile.
-  void markContextSamplesInlined(const FunctionSamples *InlinedSamples);
-  ContextTrieNode &getRootContext();
-  void promoteMergeContextSamplesTree(const Instruction &Inst,
-                                      FunctionId CalleeName);
+  LLVM_ABI void
+  markContextSamplesInlined(const FunctionSamples *InlinedSamples);
+  LLVM_ABI ContextTrieNode &getRootContext();
+  LLVM_ABI void promoteMergeContextSamplesTree(const Instruction &Inst,
+                                               FunctionId CalleeName);
 
   // Create a merged conext-less profile map.
-  void createContextLessProfileMap(SampleProfileMap &ContextLessProfiles);
+  LLVM_ABI void
+  createContextLessProfileMap(SampleProfileMap &ContextLessProfiles);
   ContextTrieNode *
   getContextNodeForProfile(const FunctionSamples *FSamples) const {
     auto I = ProfileToNodeMap.find(FSamples);
@@ -185,7 +191,7 @@ class SampleContextTracker {
   std::string getContextString(ContextTrieNode *Node) const;
 #endif
   // Dump the internal context profile trie.
-  void dump();
+  LLVM_ABI void dump();
 
 private:
   ContextTrieNode *getContextFor(const DILocation *DIL);
diff --git a/llvm/include/llvm/Transforms/IPO/SampleProfile.h b/llvm/include/llvm/Transforms/IPO/SampleProfile.h
index 6f4f9701bae93..5cb57f5b109da 100644
--- a/llvm/include/llvm/Transforms/IPO/SampleProfile.h
+++ b/llvm/include/llvm/Transforms/IPO/SampleProfile.h
@@ -18,18 +18,19 @@
 #include "llvm/IR/PassManager.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
 #include <string>
 
 namespace llvm {
 
 class Module;
 
-extern cl::opt<int> SampleHotCallSiteThreshold;
-extern cl::opt<int> SampleColdCallSiteThreshold;
-extern cl::opt<int> ProfileInlineGrowthLimit;
-extern cl::opt<int> ProfileInlineLimitMin;
-extern cl::opt<int> ProfileInlineLimitMax;
-extern cl::opt<bool> SortProfiledSCC;
+LLVM_ABI extern cl::opt<int> SampleHotCallSiteThreshold;
+LLVM_ABI extern cl::opt<int> SampleColdCallSiteThreshold;
+LLVM_ABI extern cl::opt<int> ProfileInlineGrowthLimit;
+LLVM_ABI extern cl::opt<int> ProfileInlineLimitMin;
+LLVM_ABI extern cl::opt<int> ProfileInlineLimitMax;
+LLVM_ABI extern cl::opt<bool> SortProfiledSCC;
 
 namespace vfs {
 class FileSystem;
@@ -38,14 +39,14 @@ class FileSystem;
 /// The sample profiler data loader pass.
 class SampleProfileLoaderPass : public PassInfoMixin<SampleProfileLoaderPass> {
 public:
-  SampleProfileLoaderPass(
+  LLVM_ABI SampleProfileLoaderPass(
       std::string File = "", std::string RemappingFile = "",
       ThinOrFullLTOPhase LTOPhase = ThinOrFullLTOPhase::None,
       IntrusiveRefCntPtr<vfs::FileSystem> FS = nullptr,
       bool DisableSampleProfileInlining = false,
       bool UseFlattenedProfile = false);
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 
 private:
   std::string ProfileFileName;
diff --git a/llvm/include/llvm/Transforms/IPO/SampleProfileProbe.h b/llvm/include/llvm/Transforms/IPO/SampleProfileProbe.h
index 2a47581f1ad9f..f05d0c532aa74 100644
--- a/llvm/include/llvm/Transforms/IPO/SampleProfileProbe.h
+++ b/llvm/include/llvm/Transforms/IPO/SampleProfileProbe.h
@@ -16,9 +16,10 @@
 #define LLVM_TRANSFORMS_IPO_SAMPLEPROFILEPROBE_H
 
 #include "llvm/Analysis/LazyCallGraph.h"
-#include "llvm/IR/PassManager.h"
 #include "llvm/IR/PassInstrumentation.h"
+#include "llvm/IR/PassManager.h"
 #include "llvm/ProfileData/SampleProf.h"
+#include "llvm/Support/Compiler.h"
 #include <unordered_map>
 
 namespace llvm {
@@ -47,10 +48,10 @@ using FuncProbeFactorMap = StringMap<ProbeFactorMap>;
 // function pass, the factor sum for a probe would be typically 100%.
 class PseudoProbeVerifier {
 public:
-  void registerCallbacks(PassInstrumentationCallbacks &PIC);
+  LLVM_ABI void registerCallbacks(PassInstrumentationCallbacks &PIC);
 
   // Implementation of pass instrumentation callbacks for new pass manager.
-  void runAfterPass(StringRef PassID, Any IR);
+  LLVM_ABI void runAfterPass(StringRef PassID, Any IR);
 
 private:
   // Allow a little bias due the rounding to integral factors.
@@ -74,8 +75,8 @@ class PseudoProbeVerifier {
 class SampleProfileProber {
 public:
   // Give an empty module id when the prober is not used for instrumentation.
-  SampleProfileProber(Function &F);
-  void instrumentOneFunc(Function &F, TargetMachine *TM);
+  LLVM_ABI SampleProfileProber(Function &F);
+  LLVM_ABI void instrumentOneFunc(Function &F, TargetMachine *TM);
 
 private:
   Function *getFunction() const { return F; }
@@ -117,7 +118,7 @@ class SampleProfileProbePass : public PassInfoMixin<SampleProfileProbePass> {
 
 public:
   SampleProfileProbePass(TargetMachine *TM) : TM(TM) {}
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 // Pseudo probe distribution factor updater.
@@ -137,7 +138,7 @@ class PseudoProbeUpdatePass : public PassInfoMixin<PseudoProbeUpdatePass> {
 
 public:
   PseudoProbeUpdatePass() = default;
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/Transforms/IPO/StripDeadPrototypes.h b/llvm/include/llvm/Transforms/IPO/StripDeadPrototypes.h
index 4a2eaad63113e..f307da31bbb2c 100644
--- a/llvm/include/llvm/Transforms/IPO/StripDeadPrototypes.h
+++ b/llvm/include/llvm/Transforms/IPO/StripDeadPrototypes.h
@@ -17,6 +17,7 @@
 #define LLVM_TRANSFORMS_IPO_STRIPDEADPROTOTYPES_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -24,7 +25,7 @@ class Module;
 
 /// Pass to remove unused function declarations.
 struct StripDeadPrototypesPass : PassInfoMixin<StripDeadPrototypesPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
 };
 
 }
diff --git a/llvm/include/llvm/Transforms/IPO/StripSymbols.h b/llvm/include/llvm/Transforms/IPO/StripSymbols.h
index bd5cdde290dde..7843c2ebc38f1 100644
--- a/llvm/include/llvm/Transforms/IPO/StripSymbols.h
+++ b/llvm/include/llvm/Transforms/IPO/StripSymbols.h
@@ -23,27 +23,28 @@
 #define LLVM_TRANSFORMS_IPO_STRIPSYMBOLS_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
 struct StripSymbolsPass : PassInfoMixin<StripSymbolsPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 struct StripNonDebugSymbolsPass : PassInfoMixin<StripNonDebugSymbolsPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 struct StripDebugDeclarePass : PassInfoMixin<StripDebugDeclarePass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 struct StripDeadDebugInfoPass : PassInfoMixin<StripDeadDebugInfoPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 struct StripDeadCGProfilePass : PassInfoMixin<StripDeadCGProfilePass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/Transforms/IPO/ThinLTOBitcodeWriter.h b/llvm/include/llvm/Transforms/IPO/ThinLTOBitcodeWriter.h
index b8fed10404dfa..a21db26f1edbc 100644
--- a/llvm/include/llvm/Transforms/IPO/ThinLTOBitcodeWriter.h
+++ b/llvm/include/llvm/Transforms/IPO/ThinLTOBitcodeWriter.h
@@ -16,6 +16,7 @@
 #ifndef LLVM_TRANSFORMS_IPO_THINLTOBITCODEWRITER_H
 #define LLVM_TRANSFORMS_IPO_THINLTOBITCODEWRITER_H
 
+#include "llvm/Support/Compiler.h"
 #include <llvm/IR/PassManager.h>
 
 namespace llvm {
@@ -36,7 +37,7 @@ class ThinLTOBitcodeWriterPass
       : OS(OS), ThinLinkOS(ThinLinkOS),
         ShouldPreserveUseListOrder(ShouldPreserveUseListOrder) {}
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 
   static bool isRequired() { return true; }
 };
diff --git a/llvm/include/llvm/Transforms/IPO/WholeProgramDevirt.h b/llvm/include/llvm/Transforms/IPO/WholeProgramDevirt.h
index 415bb65352da3..d34473f03c8de 100644
--- a/llvm/include/llvm/Transforms/IPO/WholeProgramDevirt.h
+++ b/llvm/include/llvm/Transforms/IPO/WholeProgramDevirt.h
@@ -17,6 +17,7 @@
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include <cassert>
 #include <cstdint>
 #include <map>
@@ -118,7 +119,7 @@ struct TypeMemberInfo {
 
 // A virtual call target, i.e. an entry in a particular vtable.
 struct VirtualCallTarget {
-  VirtualCallTarget(GlobalValue *Fn, const TypeMemberInfo *TM);
+  LLVM_ABI VirtualCallTarget(GlobalValue *Fn, const TypeMemberInfo *TM);
 
   // For testing only.
   VirtualCallTarget(const TypeMemberInfo *TM, bool IsBigEndian)
@@ -202,22 +203,22 @@ struct VirtualCallTarget {
 // Find the minimum offset that we may store a value of size Size bits at. If
 // IsAfter is set, look for an offset before the object, otherwise look for an
 // offset after the object.
-uint64_t findLowestOffset(ArrayRef<VirtualCallTarget> Targets, bool IsAfter,
-                          uint64_t Size);
+LLVM_ABI uint64_t findLowestOffset(ArrayRef<VirtualCallTarget> Targets,
+                                   bool IsAfter, uint64_t Size);
 
 // Set the stored value in each of Targets to VirtualCallTarget::RetVal at the
 // given allocation offset before the vtable address. Stores the computed
 // byte/bit offset to OffsetByte/OffsetBit.
-void setBeforeReturnValues(MutableArrayRef<VirtualCallTarget> Targets,
-                           uint64_t AllocBefore, unsigned BitWidth,
-                           int64_t &OffsetByte, uint64_t &OffsetBit);
+LLVM_ABI void setBeforeReturnValues(MutableArrayRef<VirtualCallTarget> Targets,
+                                    uint64_t AllocBefore, unsigned BitWidth,
+                                    int64_t &OffsetByte, uint64_t &OffsetBit);
 
 // Set the stored value in each of Targets to VirtualCallTarget::RetVal at the
 // given allocation offset after the vtable address. Stores the computed
 // byte/bit offset to OffsetByte/OffsetBit.
-void setAfterReturnValues(MutableArrayRef<VirtualCallTarget> Targets,
-                          uint64_t AllocAfter, unsigned BitWidth,
-                          int64_t &OffsetByte, uint64_t &OffsetBit);
+LLVM_ABI void setAfterReturnValues(MutableArrayRef<VirtualCallTarget> Targets,
+                                   uint64_t AllocAfter, unsigned BitWidth,
+                                   int64_t &OffsetByte, uint64_t &OffsetBit);
 
 } // end namespace wholeprogramdevirt
 
@@ -232,27 +233,28 @@ struct WholeProgramDevirtPass : public PassInfoMixin<WholeProgramDevirtPass> {
       : ExportSummary(ExportSummary), ImportSummary(ImportSummary) {
     assert(!(ExportSummary && ImportSummary));
   }
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
 };
 
 struct VTableSlotSummary {
   StringRef TypeID;
   uint64_t ByteOffset;
 };
-bool hasWholeProgramVisibility(bool WholeProgramVisibilityEnabledInLTO);
-void updatePublicTypeTestCalls(Module &M,
-                               bool WholeProgramVisibilityEnabledInLTO);
-void updateVCallVisibilityInModule(
+LLVM_ABI bool
+hasWholeProgramVisibility(bool WholeProgramVisibilityEnabledInLTO);
+LLVM_ABI void
+updatePublicTypeTestCalls(Module &M, bool WholeProgramVisibilityEnabledInLTO);
+LLVM_ABI void updateVCallVisibilityInModule(
     Module &M, bool WholeProgramVisibilityEnabledInLTO,
     const DenseSet<GlobalValue::GUID> &DynamicExportSymbols,
     bool ValidateAllVtablesHaveTypeInfos,
     function_ref<bool(StringRef)> IsVisibleToRegularObj);
-void updateVCallVisibilityInIndex(
+LLVM_ABI void updateVCallVisibilityInIndex(
     ModuleSummaryIndex &Index, bool WholeProgramVisibilityEnabledInLTO,
     const DenseSet<GlobalValue::GUID> &DynamicExportSymbols,
     const DenseSet<GlobalValue::GUID> &VisibleToRegularObjSymbols);
 
-void getVisibleToRegularObjVtableGUIDs(
+LLVM_ABI void getVisibleToRegularObjVtableGUIDs(
     ModuleSummaryIndex &Index,
     DenseSet<GlobalValue::GUID> &VisibleToRegularObjSymbols,
     function_ref<bool(StringRef)> IsVisibleToRegularObj);
@@ -264,13 +266,13 @@ void getVisibleToRegularObjVtableGUIDs(
 /// locating the corresponding WPD resolution is recorded for the ValueInfo
 /// in case it is exported by cross module importing (in which case the
 /// devirtualized target name will need adjustment).
-void runWholeProgramDevirtOnIndex(
+LLVM_ABI void runWholeProgramDevirtOnIndex(
     ModuleSummaryIndex &Summary, std::set<GlobalValue::GUID> &ExportedGUIDs,
     std::map<ValueInfo, std::vector<VTableSlotSummary>> &LocalWPDTargetsMap);
 
 /// Call after cross-module importing to update the recorded single impl
 /// devirt target names for any locals that were exported.
-void updateIndexWPDForExports(
+LLVM_ABI void updateIndexWPDForExports(
     ModuleSummaryIndex &Summary,
     function_ref<bool(StringRef, ValueInfo)> isExported,
     std::map<ValueInfo, std::vector<VTableSlotSummary>> &LocalWPDTargetsMap);
diff --git a/llvm/include/llvm/Transforms/InstCombine/InstCombine.h b/llvm/include/llvm/Transforms/InstCombine/InstCombine.h
index c12d749709cd2..1f758b8015efc 100644
--- a/llvm/include/llvm/Transforms/InstCombine/InstCombine.h
+++ b/llvm/include/llvm/Transforms/InstCombine/InstCombine.h
@@ -19,6 +19,7 @@
 #include "llvm/IR/Function.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/Pass.h"
+#include "llvm/Support/Compiler.h"
 
 #define DEBUG_TYPE "instcombine"
 #include "llvm/Transforms/Utils/InstructionWorklist.h"
@@ -52,18 +53,19 @@ class InstCombinePass : public PassInfoMixin<InstCombinePass> {
   static char ID;
 
 public:
-  explicit InstCombinePass(InstCombineOptions Opts = {});
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI explicit InstCombinePass(InstCombineOptions Opts = {});
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 /// The legacy pass manager's instcombine pass.
 ///
 /// This is a basic whole-function wrapper around the instcombine utility. It
 /// will try to combine all instructions in the function.
-class InstructionCombiningPass : public FunctionPass {
+class LLVM_ABI InstructionCombiningPass : public FunctionPass {
   InstructionWorklist Worklist;
 
 public:
@@ -87,7 +89,7 @@ class InstructionCombiningPass : public FunctionPass {
 // into:
 //    %Z = add int 2, %X
 //
-FunctionPass *createInstructionCombiningPass();
+LLVM_ABI FunctionPass *createInstructionCombiningPass();
 }
 
 #undef DEBUG_TYPE
diff --git a/llvm/include/llvm/Transforms/Instrumentation/AddressSanitizer.h b/llvm/include/llvm/Transforms/Instrumentation/AddressSanitizer.h
index 1b85766f6cb7c..2a9fe91b32f3c 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/AddressSanitizer.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/AddressSanitizer.h
@@ -14,6 +14,7 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_ADDRESSSANITIZER_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Instrumentation/AddressSanitizerOptions.h"
 
 namespace llvm {
@@ -38,13 +39,15 @@ struct AddressSanitizerOptions {
 /// run intependently of the function address sanitizer.
 class AddressSanitizerPass : public PassInfoMixin<AddressSanitizerPass> {
 public:
+  LLVM_ABI
   AddressSanitizerPass(const AddressSanitizerOptions &Options,
                        bool UseGlobalGC = true, bool UseOdrIndicator = true,
                        AsanDtorKind DestructorKind = AsanDtorKind::Global,
                        AsanCtorKind ConstructorKind = AsanCtorKind::Global);
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
   static bool isRequired() { return true; }
 
 private:
@@ -61,8 +64,9 @@ struct ASanAccessInfo {
   const bool IsWrite;
   const bool CompileKernel;
 
-  explicit ASanAccessInfo(int32_t Packed);
-  ASanAccessInfo(bool IsWrite, bool CompileKernel, uint8_t AccessSizeIndex);
+  LLVM_ABI explicit ASanAccessInfo(int32_t Packed);
+  LLVM_ABI ASanAccessInfo(bool IsWrite, bool CompileKernel,
+                          uint8_t AccessSizeIndex);
 };
 
 } // namespace llvm
diff --git a/llvm/include/llvm/Transforms/Instrumentation/BoundsChecking.h b/llvm/include/llvm/Transforms/Instrumentation/BoundsChecking.h
index ab2dcee06551e..8e7df5e6b10f0 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/BoundsChecking.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/BoundsChecking.h
@@ -10,6 +10,7 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_BOUNDSCHECKING_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include <optional>
 
 namespace llvm {
@@ -33,10 +34,11 @@ class BoundsCheckingPass : public PassInfoMixin<BoundsCheckingPass> {
   };
 
   BoundsCheckingPass(Options Opts) : Opts(Opts) {}
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
   static bool isRequired() { return true; }
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
 private:
   Options Opts;
diff --git a/llvm/include/llvm/Transforms/Instrumentation/DataFlowSanitizer.h b/llvm/include/llvm/Transforms/Instrumentation/DataFlowSanitizer.h
index 3256dddd12b38..af3662e4a6565 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/DataFlowSanitizer.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/DataFlowSanitizer.h
@@ -9,6 +9,7 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_DATAFLOWSANITIZER_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include <string>
 #include <vector>
 
@@ -23,7 +24,7 @@ class DataFlowSanitizerPass : public PassInfoMixin<DataFlowSanitizerPass> {
   DataFlowSanitizerPass(
       const std::vector<std::string> &ABIListFiles = std::vector<std::string>())
       : ABIListFiles(ABIListFiles) {}
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
   static bool isRequired() { return true; }
 };
 
diff --git a/llvm/include/llvm/Transforms/Instrumentation/GCOVProfiler.h b/llvm/include/llvm/Transforms/Instrumentation/GCOVProfiler.h
index f933332cee0cf..4d3ead29af0d2 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/GCOVProfiler.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/GCOVProfiler.h
@@ -13,6 +13,7 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_GCOVPROFILER_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/Instrumentation.h"
 
 namespace llvm {
@@ -20,7 +21,7 @@ namespace llvm {
 class GCOVProfilerPass : public PassInfoMixin<GCOVProfilerPass> {
 public:
   GCOVProfilerPass(const GCOVOptions &Options = GCOVOptions::getDefault()) : GCOVOpts(Options) { }
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 
 private:
   GCOVOptions GCOVOpts;
diff --git a/llvm/include/llvm/Transforms/Instrumentation/HWAddressSanitizer.h b/llvm/include/llvm/Transforms/Instrumentation/HWAddressSanitizer.h
index 11ea66780d8c5..d9292ea7d1613 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/HWAddressSanitizer.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/HWAddressSanitizer.h
@@ -15,6 +15,7 @@
 
 #include "llvm/ADT/STLFunctionalExtras.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class Module;
@@ -40,10 +41,11 @@ class HWAddressSanitizerPass : public PassInfoMixin<HWAddressSanitizerPass> {
 public:
   explicit HWAddressSanitizerPass(HWAddressSanitizerOptions Options)
       : Options(Options){};
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
   static bool isRequired() { return true; }
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
 private:
   HWAddressSanitizerOptions Options;
diff --git a/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h b/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h
index 2042700ad6b6a..469c12ee69652 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h
@@ -14,6 +14,7 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_INSTRPROFILING_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/Instrumentation.h"
 
 namespace llvm {
@@ -33,7 +34,7 @@ class InstrProfilingLoweringPass
   InstrProfilingLoweringPass(const InstrProfOptions &Options, bool IsCS = false)
       : Options(Options), IsCS(IsCS) {}
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Instrumentation/KCFI.h b/llvm/include/llvm/Transforms/Instrumentation/KCFI.h
index 9caa644f4747e..2711930a20b5b 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/KCFI.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/KCFI.h
@@ -15,12 +15,13 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_KCFI_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class KCFIPass : public PassInfoMixin<KCFIPass> {
 public:
   static bool isRequired() { return true; }
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 } // namespace llvm
 #endif // LLVM_TRANSFORMS_INSTRUMENTATION_KCFI_H
diff --git a/llvm/include/llvm/Transforms/Instrumentation/LowerAllowCheckPass.h b/llvm/include/llvm/Transforms/Instrumentation/LowerAllowCheckPass.h
index 2c6e60138f2aa..7b095ea24b4b0 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/LowerAllowCheckPass.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/LowerAllowCheckPass.h
@@ -17,6 +17,7 @@
 #include "llvm/IR/Function.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/Pass.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -30,11 +31,12 @@ class LowerAllowCheckPass : public PassInfoMixin<LowerAllowCheckPass> {
 
   explicit LowerAllowCheckPass(LowerAllowCheckPass::Options Opts)
       : Opts(std::move(Opts)) {};
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 
-  static bool IsRequested();
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI static bool IsRequested();
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
 private:
   LowerAllowCheckPass::Options Opts;
diff --git a/llvm/include/llvm/Transforms/Instrumentation/MemProfInstrumentation.h b/llvm/include/llvm/Transforms/Instrumentation/MemProfInstrumentation.h
index 31a1fe1202ba7..521491b87a1e5 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/MemProfInstrumentation.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/MemProfInstrumentation.h
@@ -14,6 +14,7 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_MEMPROF_INSTRUMENTATION_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class Function;
@@ -28,8 +29,8 @@ class Module;
 /// record data about the allocations.
 class MemProfilerPass : public PassInfoMixin<MemProfilerPass> {
 public:
-  explicit MemProfilerPass();
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI explicit MemProfilerPass();
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
   static bool isRequired() { return true; }
 };
 
@@ -37,8 +38,8 @@ class MemProfilerPass : public PassInfoMixin<MemProfilerPass> {
 /// to profile memory allocations and accesses.
 class ModuleMemProfilerPass : public PassInfoMixin<ModuleMemProfilerPass> {
 public:
-  explicit ModuleMemProfilerPass();
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI explicit ModuleMemProfilerPass();
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
   static bool isRequired() { return true; }
 };
 
diff --git a/llvm/include/llvm/Transforms/Instrumentation/MemProfUse.h b/llvm/include/llvm/Transforms/Instrumentation/MemProfUse.h
index 3657845b036cf..6170bf48e4695 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/MemProfUse.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/MemProfUse.h
@@ -15,6 +15,7 @@
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/ProfileData/MemProf.h"
+#include "llvm/Support/Compiler.h"
 
 #include <unordered_map>
 
@@ -29,9 +30,10 @@ class FileSystem;
 
 class MemProfUsePass : public PassInfoMixin<MemProfUsePass> {
 public:
-  explicit MemProfUsePass(std::string MemoryProfileFile,
-                          IntrusiveRefCntPtr<vfs::FileSystem> FS = nullptr);
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI explicit MemProfUsePass(
+      std::string MemoryProfileFile,
+      IntrusiveRefCntPtr<vfs::FileSystem> FS = nullptr);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 
 private:
   std::string MemoryProfileFileName;
@@ -42,7 +44,7 @@ namespace memprof {
 
 // Extract all calls from the IR.  Arrange them in a map from caller GUIDs to a
 // list of call sites, each of the form {LineLocation, CalleeGUID}.
-DenseMap<uint64_t, SmallVector<CallEdgeTy, 0>> extractCallsFromIR(
+LLVM_ABI DenseMap<uint64_t, SmallVector<CallEdgeTy, 0>> extractCallsFromIR(
     Module &M, const TargetLibraryInfo &TLI,
     function_ref<bool(uint64_t)> IsPresentInProfile = [](uint64_t) {
       return true;
@@ -59,7 +61,7 @@ using LocToLocMap =
 
 // Compute an undrifting map.  The result is a map from caller GUIDs to an inner
 // map that maps source locations in the profile to those in the current IR.
-DenseMap<uint64_t, LocToLocMap>
+LLVM_ABI DenseMap<uint64_t, LocToLocMap>
 computeUndriftMap(Module &M, IndexedInstrProfReader *MemProfReader,
                   const TargetLibraryInfo &TLI);
 
diff --git a/llvm/include/llvm/Transforms/Instrumentation/MemorySanitizer.h b/llvm/include/llvm/Transforms/Instrumentation/MemorySanitizer.h
index f88d832351118..1095e9d76d048 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/MemorySanitizer.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/MemorySanitizer.h
@@ -15,6 +15,7 @@
 
 #include "llvm/ADT/STLFunctionalExtras.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class Module;
@@ -25,8 +26,8 @@ struct MemorySanitizerOptions {
   MemorySanitizerOptions() : MemorySanitizerOptions(0, false, false, false){};
   MemorySanitizerOptions(int TrackOrigins, bool Recover, bool Kernel)
       : MemorySanitizerOptions(TrackOrigins, Recover, Kernel, false) {}
-  MemorySanitizerOptions(int TrackOrigins, bool Recover, bool Kernel,
-                         bool EagerChecks);
+  LLVM_ABI MemorySanitizerOptions(int TrackOrigins, bool Recover, bool Kernel,
+                                  bool EagerChecks);
   bool Kernel;
   int TrackOrigins;
   bool Recover;
@@ -42,9 +43,10 @@ struct MemorySanitizerOptions {
 struct MemorySanitizerPass : public PassInfoMixin<MemorySanitizerPass> {
   MemorySanitizerPass(MemorySanitizerOptions Options) : Options(Options) {}
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
   static bool isRequired() { return true; }
 
 private:
diff --git a/llvm/include/llvm/Transforms/Instrumentation/NumericalStabilitySanitizer.h b/llvm/include/llvm/Transforms/Instrumentation/NumericalStabilitySanitizer.h
index 9aafe6cc48f87..7ba938e01d819 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/NumericalStabilitySanitizer.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/NumericalStabilitySanitizer.h
@@ -16,6 +16,7 @@
 
 #include "llvm/IR/PassManager.h"
 #include "llvm/Pass.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -27,7 +28,7 @@ namespace llvm {
 /// functions aren't declared yet, the pass inserts the declarations.
 struct NumericalStabilitySanitizerPass
     : public PassInfoMixin<NumericalStabilitySanitizerPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
   static bool isRequired() { return true; }
 };
 
diff --git a/llvm/include/llvm/Transforms/Instrumentation/PGOInstrumentation.h b/llvm/include/llvm/Transforms/Instrumentation/PGOInstrumentation.h
index 1d0af87e965af..5084e53b24397 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/PGOInstrumentation.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/PGOInstrumentation.h
@@ -19,21 +19,19 @@
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/VirtualFileSystem.h"
 #include <cstdint>
 #include <string>
 
 namespace llvm {
 
-extern cl::opt<bool> DebugInfoCorrelate;
+LLVM_ABI extern cl::opt<bool> DebugInfoCorrelate;
 
 class Function;
 class Instruction;
 class Module;
 
-namespace vfs {
-class FileSystem;
-} // namespace vfs
-
 /// The instrumentation (profile-instr-gen) pass for IR based PGO.
 // We use this pass to create COMDAT profile variables for context
 // sensitive PGO (CSPGO). The reason to have a pass for this is CSPGO
@@ -46,7 +44,7 @@ class PGOInstrumentationGenCreateVar
   PGOInstrumentationGenCreateVar(std::string CSInstrName = "",
                                  bool Sampling = false)
       : CSInstrName(CSInstrName), ProfileSampling(Sampling) {}
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
 
 private:
   std::string CSInstrName;
@@ -60,7 +58,7 @@ class PGOInstrumentationGen : public PassInfoMixin<PGOInstrumentationGen> {
   PGOInstrumentationGen(
       PGOInstrumentationType InstrumentationType = PGOInstrumentationType ::FDO)
       : InstrumentationType(InstrumentationType) {}
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
 
 private:
   // If this is a context sensitive instrumentation.
@@ -70,11 +68,12 @@ class PGOInstrumentationGen : public PassInfoMixin<PGOInstrumentationGen> {
 /// The profile annotation (profile-instr-use) pass for IR based PGO.
 class PGOInstrumentationUse : public PassInfoMixin<PGOInstrumentationUse> {
 public:
+  LLVM_ABI
   PGOInstrumentationUse(std::string Filename = "",
                         std::string RemappingFilename = "", bool IsCS = false,
                         IntrusiveRefCntPtr<vfs::FileSystem> FS = nullptr);
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
 
 private:
   std::string ProfileFileName;
@@ -90,7 +89,7 @@ class PGOIndirectCallPromotion : public PassInfoMixin<PGOIndirectCallPromotion>
   PGOIndirectCallPromotion(bool IsInLTO = false, bool SamplePGO = false)
       : InLTO(IsInLTO), SamplePGO(SamplePGO) {}
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
 
 private:
   bool InLTO;
@@ -102,13 +101,14 @@ class PGOMemOPSizeOpt : public PassInfoMixin<PGOMemOPSizeOpt> {
 public:
   PGOMemOPSizeOpt() = default;
 
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &MAM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &MAM);
 };
 
-void setProfMetadata(Module *M, Instruction *TI, ArrayRef<uint64_t> EdgeCounts,
-                     uint64_t MaxCount);
+LLVM_ABI void setProfMetadata(Module *M, Instruction *TI,
+                              ArrayRef<uint64_t> EdgeCounts, uint64_t MaxCount);
 
-void setIrrLoopHeaderMetadata(Module *M, Instruction *TI, uint64_t Count);
+LLVM_ABI void setIrrLoopHeaderMetadata(Module *M, Instruction *TI,
+                                       uint64_t Count);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Instrumentation/RealtimeSanitizer.h b/llvm/include/llvm/Transforms/Instrumentation/RealtimeSanitizer.h
index 5ee1cb0443932..67697c695f1a4 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/RealtimeSanitizer.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/RealtimeSanitizer.h
@@ -20,12 +20,13 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_REALTIMESANITIZER_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
 /// Create ctor and init functions.
 struct RealtimeSanitizerPass : public PassInfoMixin<RealtimeSanitizerPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
   static bool isRequired() { return true; }
 };
 
diff --git a/llvm/include/llvm/Transforms/Instrumentation/SanitizerBinaryMetadata.h b/llvm/include/llvm/Transforms/Instrumentation/SanitizerBinaryMetadata.h
index 9efa23108d6a3..054016622a577 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/SanitizerBinaryMetadata.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/SanitizerBinaryMetadata.h
@@ -16,6 +16,7 @@
 #include "llvm/IR/Function.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/Instrumentation.h"
 
 namespace llvm {
@@ -50,10 +51,10 @@ inline constexpr char kSanitizerBinaryMetadataAtomicsSection[] =
 class SanitizerBinaryMetadataPass
     : public PassInfoMixin<SanitizerBinaryMetadataPass> {
 public:
-  explicit SanitizerBinaryMetadataPass(
+  LLVM_ABI explicit SanitizerBinaryMetadataPass(
       SanitizerBinaryMetadataOptions Opts = {},
       ArrayRef<std::string> IgnorelistFiles = {});
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
   static bool isRequired() { return true; }
 
 private:
diff --git a/llvm/include/llvm/Transforms/Instrumentation/SanitizerCoverage.h b/llvm/include/llvm/Transforms/Instrumentation/SanitizerCoverage.h
index a49a8cb282393..f14f5b90a5cc9 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/SanitizerCoverage.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/SanitizerCoverage.h
@@ -16,6 +16,7 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_SANITIZERCOVERAGE_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/SpecialCaseList.h"
 #include "llvm/Support/VirtualFileSystem.h"
 #include "llvm/Transforms/Utils/Instrumentation.h"
@@ -43,7 +44,7 @@ class SanitizerCoveragePass : public PassInfoMixin<SanitizerCoveragePass> {
       Blocklist = SpecialCaseList::createOrDie(BlocklistFiles,
                                                *vfs::getRealFileSystem());
   }
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
   static bool isRequired() { return true; }
 
 private:
diff --git a/llvm/include/llvm/Transforms/Instrumentation/ThreadSanitizer.h b/llvm/include/llvm/Transforms/Instrumentation/ThreadSanitizer.h
index 346951febf735..dea3b6b754b66 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/ThreadSanitizer.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/ThreadSanitizer.h
@@ -14,6 +14,7 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_THREADSANITIZER_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class Function;
@@ -25,7 +26,7 @@ class Module;
 /// inserts calls to runtime library functions. If the functions aren't declared
 /// yet, the pass inserts the declarations. Otherwise the existing globals are
 struct ThreadSanitizerPass : public PassInfoMixin<ThreadSanitizerPass> {
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &FAM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &FAM);
   static bool isRequired() { return true; }
 };
 
@@ -34,7 +35,7 @@ struct ThreadSanitizerPass : public PassInfoMixin<ThreadSanitizerPass> {
 /// Create ctor and init functions.
 struct ModuleThreadSanitizerPass
   : public PassInfoMixin<ModuleThreadSanitizerPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
   static bool isRequired() { return true; }
 };
 
diff --git a/llvm/include/llvm/Transforms/Instrumentation/TypeSanitizer.h b/llvm/include/llvm/Transforms/Instrumentation/TypeSanitizer.h
index 20f08b6790855..61a1c3e01c2c6 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/TypeSanitizer.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/TypeSanitizer.h
@@ -14,6 +14,7 @@
 #define LLVM_TRANSFORMS_INSTRUMENTATION_TYPESANITIZER_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class Function;
@@ -21,7 +22,7 @@ class FunctionPass;
 class Module;
 
 struct TypeSanitizerPass : public PassInfoMixin<TypeSanitizerPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
   static bool isRequired() { return true; }
 };
 
diff --git a/llvm/include/llvm/Transforms/ObjCARC.h b/llvm/include/llvm/Transforms/ObjCARC.h
index bd17c58e842ee..c927513469a35 100644
--- a/llvm/include/llvm/Transforms/ObjCARC.h
+++ b/llvm/include/llvm/Transforms/ObjCARC.h
@@ -15,6 +15,7 @@
 #define LLVM_TRANSFORMS_OBJCARC_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -24,26 +25,26 @@ class Pass;
 //
 // ObjCARCContract - Late ObjC ARC cleanups.
 //
-Pass *createObjCARCContractPass();
+LLVM_ABI Pass *createObjCARCContractPass();
 
 struct ObjCARCOptPass : public PassInfoMixin<ObjCARCOptPass> {
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 struct ObjCARCContractPass : public PassInfoMixin<ObjCARCContractPass> {
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 struct ObjCARCAPElimPass : public PassInfoMixin<ObjCARCAPElimPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 
 struct ObjCARCExpandPass : public PassInfoMixin<ObjCARCExpandPass> {
-  PreservedAnalyses run(Function &M, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &M, FunctionAnalysisManager &AM);
 };
 
 struct PAEvalPass : public PassInfoMixin<PAEvalPass> {
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 } // End llvm namespace
diff --git a/llvm/include/llvm/Transforms/Scalar.h b/llvm/include/llvm/Transforms/Scalar.h
index fc772a7639c47..1398f171b0f78 100644
--- a/llvm/include/llvm/Transforms/Scalar.h
+++ b/llvm/include/llvm/Transforms/Scalar.h
@@ -14,6 +14,7 @@
 #ifndef LLVM_TRANSFORMS_SCALAR_H
 #define LLVM_TRANSFORMS_SCALAR_H
 
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/SimplifyCFGOptions.h"
 #include <functional>
 
@@ -30,26 +31,26 @@ class Pass;
 // their other instructions become dead, to eliminate chains of dead
 // computations.
 //
-FunctionPass *createDeadCodeEliminationPass();
+LLVM_ABI FunctionPass *createDeadCodeEliminationPass();
 
 //===----------------------------------------------------------------------===//
 //
 // SROA - Replace aggregates or pieces of aggregates with scalar SSA values.
 //
-FunctionPass *createSROAPass(bool PreserveCFG = true);
+LLVM_ABI FunctionPass *createSROAPass(bool PreserveCFG = true);
 
 //===----------------------------------------------------------------------===//
 //
 // LICM - This pass is a loop invariant code motion and memory promotion pass.
 //
-Pass *createLICMPass();
+LLVM_ABI Pass *createLICMPass();
 
 //===----------------------------------------------------------------------===//
 //
 // LoopStrengthReduce - This pass is strength reduces GEP instructions that use
 // a loop's canonical induction variable as one of their indices.
 //
-Pass *createLoopStrengthReducePass();
+LLVM_ABI Pass *createLoopStrengthReducePass();
 
 //===----------------------------------------------------------------------===//
 //
@@ -57,17 +58,18 @@ Pass *createLoopStrengthReducePass();
 // a loop terminator instruction by rewriting it in terms of another IV.
 // Expected to be run immediately after LSR.
 //
-Pass *createLoopTermFoldPass();
+LLVM_ABI Pass *createLoopTermFoldPass();
 
 //===----------------------------------------------------------------------===//
 //
 // LoopUnroll - This pass is a simple loop unrolling pass.
 //
-Pass *createLoopUnrollPass(int OptLevel = 2, bool OnlyWhenForced = false,
-                           bool ForgetAllSCEV = false, int Threshold = -1,
-                           int Count = -1, int AllowPartial = -1,
-                           int Runtime = -1, int UpperBound = -1,
-                           int AllowPeeling = -1);
+LLVM_ABI Pass *createLoopUnrollPass(int OptLevel = 2,
+                                    bool OnlyWhenForced = false,
+                                    bool ForgetAllSCEV = false,
+                                    int Threshold = -1, int Count = -1,
+                                    int AllowPartial = -1, int Runtime = -1,
+                                    int UpperBound = -1, int AllowPeeling = -1);
 
 //===----------------------------------------------------------------------===//
 //
@@ -76,14 +78,14 @@ Pass *createLoopUnrollPass(int OptLevel = 2, bool OnlyWhenForced = false,
 //
 // For example:  4 + (x + 5)  ->  x + (4 + 5)
 //
-FunctionPass *createReassociatePass();
+LLVM_ABI FunctionPass *createReassociatePass();
 
 //===----------------------------------------------------------------------===//
 //
 // CFGSimplification - Merge basic blocks, eliminate unreachable blocks,
 // simplify terminator instructions, convert switches to lookup tables, etc.
 //
-FunctionPass *createCFGSimplificationPass(
+LLVM_ABI FunctionPass *createCFGSimplificationPass(
     SimplifyCFGOptions Options = SimplifyCFGOptions(),
     std::function<bool(const Function &)> Ftor = nullptr);
 
@@ -92,7 +94,7 @@ FunctionPass *createCFGSimplificationPass(
 // FlattenCFG - flatten CFG, reduce number of conditional branches by using
 // parallel-and and parallel-or mode, etc...
 //
-FunctionPass *createFlattenCFGPass();
+LLVM_ABI FunctionPass *createFlattenCFGPass();
 
 //===----------------------------------------------------------------------===//
 //
@@ -101,45 +103,45 @@ FunctionPass *createFlattenCFGPass();
 ///
 /// When \p SkipUniformRegions is true the structizer will not structurize
 /// regions that only contain uniform branches.
-Pass *createStructurizeCFGPass(bool SkipUniformRegions = false);
+LLVM_ABI Pass *createStructurizeCFGPass(bool SkipUniformRegions = false);
 
 //===----------------------------------------------------------------------===//
 //
 // TailCallElimination - This pass eliminates call instructions to the current
 // function which occur immediately before return instructions.
 //
-FunctionPass *createTailCallEliminationPass();
+LLVM_ABI FunctionPass *createTailCallEliminationPass();
 
 //===----------------------------------------------------------------------===//
 //
 // EarlyCSE - This pass performs a simple and fast CSE pass over the dominator
 // tree.
 //
-FunctionPass *createEarlyCSEPass(bool UseMemorySSA = false);
+LLVM_ABI FunctionPass *createEarlyCSEPass(bool UseMemorySSA = false);
 
 //===----------------------------------------------------------------------===//
 //
 // ConstantHoisting - This pass prepares a function for expensive constants.
 //
-FunctionPass *createConstantHoistingPass();
+LLVM_ABI FunctionPass *createConstantHoistingPass();
 
 //===----------------------------------------------------------------------===//
 //
 // Sink - Code Sinking
 //
-FunctionPass *createSinkingPass();
+LLVM_ABI FunctionPass *createSinkingPass();
 
 //===----------------------------------------------------------------------===//
 //
 // LowerAtomic - Lower atomic intrinsics to non-atomic form
 //
-Pass *createLowerAtomicPass();
+LLVM_ABI Pass *createLowerAtomicPass();
 
 //===----------------------------------------------------------------------===//
 //
 // MergeICmps - Merge integer comparison chains into a memcmp
 //
-Pass *createMergeICmpsLegacyPass();
+LLVM_ABI Pass *createMergeICmpsLegacyPass();
 
 //===----------------------------------------------------------------------===//
 //
@@ -148,66 +150,67 @@ Pass *createMergeICmpsLegacyPass();
 // on the target. If AddressSpace is left to its default value, it will be
 // obtained from the TargetTransformInfo.
 //
-FunctionPass *createInferAddressSpacesPass(unsigned AddressSpace = ~0u);
-extern char &InferAddressSpacesID;
+LLVM_ABI FunctionPass *
+createInferAddressSpacesPass(unsigned AddressSpace = ~0u);
+LLVM_ABI extern char &InferAddressSpacesID;
 
 //===----------------------------------------------------------------------===//
 //
 // PartiallyInlineLibCalls - Tries to inline the fast path of library
 // calls such as sqrt.
 //
-FunctionPass *createPartiallyInlineLibCallsPass();
+LLVM_ABI FunctionPass *createPartiallyInlineLibCallsPass();
 
 //===----------------------------------------------------------------------===//
 //
 // SeparateConstOffsetFromGEP - Split GEPs for better CSE
 //
-FunctionPass *createSeparateConstOffsetFromGEPPass(bool LowerGEP = false);
+LLVM_ABI FunctionPass *
+createSeparateConstOffsetFromGEPPass(bool LowerGEP = false);
 
 //===----------------------------------------------------------------------===//
 //
 // SpeculativeExecution - Aggressively hoist instructions to enable
 // speculative execution on targets where branches are expensive.
 //
-FunctionPass *createSpeculativeExecutionPass();
+LLVM_ABI FunctionPass *createSpeculativeExecutionPass();
 
 // Same as createSpeculativeExecutionPass, but does nothing unless
 // TargetTransformInfo::hasBranchDivergence() is true.
-FunctionPass *createSpeculativeExecutionIfHasBranchDivergencePass();
+LLVM_ABI FunctionPass *createSpeculativeExecutionIfHasBranchDivergencePass();
 
 //===----------------------------------------------------------------------===//
 //
 // StraightLineStrengthReduce - This pass strength-reduces some certain
 // instruction patterns in straight-line code.
 //
-FunctionPass *createStraightLineStrengthReducePass();
+LLVM_ABI FunctionPass *createStraightLineStrengthReducePass();
 
 //===----------------------------------------------------------------------===//
 //
 // NaryReassociate - Simplify n-ary operations by reassociation.
 //
-FunctionPass *createNaryReassociatePass();
+LLVM_ABI FunctionPass *createNaryReassociatePass();
 
 //===----------------------------------------------------------------------===//
 //
 // LoopDataPrefetch - Perform data prefetching in loops.
 //
-FunctionPass *createLoopDataPrefetchPass();
+LLVM_ABI FunctionPass *createLoopDataPrefetchPass();
 
 //===----------------------------------------------------------------------===//
 //
 // This pass does instruction simplification on each
 // instruction in a function.
 //
-FunctionPass *createInstSimplifyLegacyPass();
-
+LLVM_ABI FunctionPass *createInstSimplifyLegacyPass();
 
 //===----------------------------------------------------------------------===//
 //
 // createScalarizeMaskedMemIntrinPass - Replace masked load, store, gather
 // and scatter intrinsics with scalar code when target doesn't support them.
 //
-FunctionPass *createScalarizeMaskedMemIntrinLegacyPass();
+LLVM_ABI FunctionPass *createScalarizeMaskedMemIntrinLegacyPass();
 } // End llvm namespace
 
 #endif
diff --git a/llvm/include/llvm/Transforms/Scalar/EarlyCSE.h b/llvm/include/llvm/Transforms/Scalar/EarlyCSE.h
index 877d8145e746c..cbde7ff18ff79 100644
--- a/llvm/include/llvm/Transforms/Scalar/EarlyCSE.h
+++ b/llvm/include/llvm/Transforms/Scalar/EarlyCSE.h
@@ -15,6 +15,7 @@
 #define LLVM_TRANSFORMS_SCALAR_EARLYCSE_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -31,9 +32,10 @@ struct EarlyCSEPass : PassInfoMixin<EarlyCSEPass> {
   EarlyCSEPass(bool UseMemorySSA = false) : UseMemorySSA(UseMemorySSA) {}
 
   /// Run the pass over the function.
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
   bool UseMemorySSA;
 };
diff --git a/llvm/include/llvm/Transforms/Scalar/GVN.h b/llvm/include/llvm/Transforms/Scalar/GVN.h
index 25b042eebf664..e156ec469a14f 100644
--- a/llvm/include/llvm/Transforms/Scalar/GVN.h
+++ b/llvm/include/llvm/Transforms/Scalar/GVN.h
@@ -130,25 +130,26 @@ class GVNPass : public PassInfoMixin<GVNPass> {
   GVNPass(GVNOptions Options = {}) : Options(Options) {}
 
   /// Run the pass over the function.
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
   /// This removes the specified instruction from
   /// our various maps and marks it for deletion.
-  void salvageAndRemoveInstruction(Instruction *I);
+  LLVM_ABI void salvageAndRemoveInstruction(Instruction *I);
 
   DominatorTree &getDominatorTree() const { return *DT; }
   AAResults *getAliasAnalysis() const { return VN.getAliasAnalysis(); }
   MemoryDependenceResults &getMemDep() const { return *MD; }
 
-  bool isPREEnabled() const;
-  bool isLoadPREEnabled() const;
-  bool isLoadInLoopPREEnabled() const;
-  bool isLoadPRESplitBackedgeEnabled() const;
-  bool isMemDepEnabled() const;
-  bool isMemorySSAEnabled() const;
+  LLVM_ABI bool isPREEnabled() const;
+  LLVM_ABI bool isLoadPREEnabled() const;
+  LLVM_ABI bool isLoadInLoopPREEnabled() const;
+  LLVM_ABI bool isLoadPRESplitBackedgeEnabled() const;
+  LLVM_ABI bool isMemDepEnabled() const;
+  LLVM_ABI bool isMemorySSAEnabled() const;
 
   /// This class holds the mapping between values and value numbers.  It is used
   /// as an efficient mechanism to determine the expression-wise equivalence of
@@ -194,29 +195,31 @@ class GVNPass : public PassInfoMixin<GVNPass> {
     bool areAllValsInBB(uint32_t Num, const BasicBlock *BB, GVNPass &GVN);
 
   public:
-    ValueTable();
-    ValueTable(const ValueTable &Arg);
-    ValueTable(ValueTable &&Arg);
-    ~ValueTable();
-    ValueTable &operator=(const ValueTable &Arg);
-
-    uint32_t lookupOrAdd(Value *V);
-    uint32_t lookup(Value *V, bool Verify = true) const;
-    uint32_t lookupOrAddCmp(unsigned Opcode, CmpInst::Predicate Pred,
-                            Value *LHS, Value *RHS);
-    uint32_t phiTranslate(const BasicBlock *BB, const BasicBlock *PhiBlock,
-                          uint32_t Num, GVNPass &GVN);
-    void eraseTranslateCacheEntry(uint32_t Num, const BasicBlock &CurrBlock);
-    bool exists(Value *V) const;
-    void add(Value *V, uint32_t Num);
-    void clear();
-    void erase(Value *V);
+    LLVM_ABI ValueTable();
+    LLVM_ABI ValueTable(const ValueTable &Arg);
+    LLVM_ABI ValueTable(ValueTable &&Arg);
+    LLVM_ABI ~ValueTable();
+    LLVM_ABI ValueTable &operator=(const ValueTable &Arg);
+
+    LLVM_ABI uint32_t lookupOrAdd(Value *V);
+    LLVM_ABI uint32_t lookup(Value *V, bool Verify = true) const;
+    LLVM_ABI uint32_t lookupOrAddCmp(unsigned Opcode, CmpInst::Predicate Pred,
+                                     Value *LHS, Value *RHS);
+    LLVM_ABI uint32_t phiTranslate(const BasicBlock *BB,
+                                   const BasicBlock *PhiBlock, uint32_t Num,
+                                   GVNPass &GVN);
+    LLVM_ABI void eraseTranslateCacheEntry(uint32_t Num,
+                                           const BasicBlock &CurrBlock);
+    LLVM_ABI bool exists(Value *V) const;
+    LLVM_ABI void add(Value *V, uint32_t Num);
+    LLVM_ABI void clear();
+    LLVM_ABI void erase(Value *V);
     void setAliasAnalysis(AAResults *A) { AA = A; }
     AAResults *getAliasAnalysis() const { return AA; }
     void setMemDep(MemoryDependenceResults *M) { MD = M; }
     void setDomTree(DominatorTree *D) { DT = D; }
     uint32_t getNextUnusedValueNumber() { return NextValueNumber; }
-    void verifyRemoved(const Value *) const;
+    LLVM_ABI void verifyRemoved(const Value *) const;
   };
 
 private:
@@ -289,9 +292,9 @@ class GVNPass : public PassInfoMixin<GVNPass> {
                             leader_iterator(nullptr));
     }
 
-    void insert(uint32_t N, Value *V, const BasicBlock *BB);
-    void erase(uint32_t N, Instruction *I, const BasicBlock *BB);
-    void verifyRemoved(const Value *Inst) const;
+    LLVM_ABI void insert(uint32_t N, Value *V, const BasicBlock *BB);
+    LLVM_ABI void erase(uint32_t N, Instruction *I, const BasicBlock *BB);
+    LLVM_ABI void verifyRemoved(const Value *Inst) const;
     void clear() {
       NumToLeaders.clear();
       TableAllocator.Reset();
@@ -388,20 +391,20 @@ class GVNPass : public PassInfoMixin<GVNPass> {
 };
 
 /// Create a legacy GVN pass.
-FunctionPass *createGVNPass();
+LLVM_ABI FunctionPass *createGVNPass();
 
 /// A simple and fast domtree-based GVN pass to hoist common expressions
 /// from sibling branches.
 struct GVNHoistPass : PassInfoMixin<GVNHoistPass> {
   /// Run the pass over the function.
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 /// Uses an "inverted" value numbering to decide the similarity of
 /// expressions and sinks similar expressions into successors.
 struct GVNSinkPass : PassInfoMixin<GVNSinkPass> {
   /// Run the pass over the function.
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/Transforms/Scalar/JumpThreading.h b/llvm/include/llvm/Transforms/Scalar/JumpThreading.h
index 182cab02e640c..75b5cf2371fda 100644
--- a/llvm/include/llvm/Transforms/Scalar/JumpThreading.h
+++ b/llvm/include/llvm/Transforms/Scalar/JumpThreading.h
@@ -22,6 +22,7 @@
 #include "llvm/Analysis/BranchProbabilityInfo.h"
 #include "llvm/Analysis/DomTreeUpdater.h"
 #include "llvm/IR/ValueHandle.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/ValueMapper.h"
 #include <optional>
 #include <utility>
@@ -102,36 +103,38 @@ class JumpThreadingPass : public PassInfoMixin<JumpThreadingPass> {
   unsigned DefaultBBDupThreshold;
 
 public:
-  JumpThreadingPass(int T = -1);
+  LLVM_ABI JumpThreadingPass(int T = -1);
 
   // Glue for old PM.
-  bool runImpl(Function &F, FunctionAnalysisManager *FAM,
-               TargetLibraryInfo *TLI, TargetTransformInfo *TTI,
-               LazyValueInfo *LVI, AAResults *AA,
-               std::unique_ptr<DomTreeUpdater> DTU,
-               std::optional<BlockFrequencyInfo *> BFI,
-               std::optional<BranchProbabilityInfo *> BPI);
+  LLVM_ABI bool runImpl(Function &F, FunctionAnalysisManager *FAM,
+                        TargetLibraryInfo *TLI, TargetTransformInfo *TTI,
+                        LazyValueInfo *LVI, AAResults *AA,
+                        std::unique_ptr<DomTreeUpdater> DTU,
+                        std::optional<BlockFrequencyInfo *> BFI,
+                        std::optional<BranchProbabilityInfo *> BPI);
 
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 
   DomTreeUpdater *getDomTreeUpdater() const { return DTU.get(); }
-  void findLoopHeaders(Function &F);
-  bool processBlock(BasicBlock *BB);
-  bool maybeMergeBasicBlockIntoOnlyPred(BasicBlock *BB);
-  void updateSSA(BasicBlock *BB, BasicBlock *NewBB,
-                 ValueToValueMapTy &ValueMapping);
-  void cloneInstructions(ValueToValueMapTy &ValueMapping,
-                         BasicBlock::iterator BI, BasicBlock::iterator BE,
-                         BasicBlock *NewBB, BasicBlock *PredBB);
-  bool tryThreadEdge(BasicBlock *BB,
-                     const SmallVectorImpl<BasicBlock *> &PredBBs,
-                     BasicBlock *SuccBB);
-  void threadEdge(BasicBlock *BB, const SmallVectorImpl<BasicBlock *> &PredBBs,
-                  BasicBlock *SuccBB);
-  bool duplicateCondBranchOnPHIIntoPred(
+  LLVM_ABI void findLoopHeaders(Function &F);
+  LLVM_ABI bool processBlock(BasicBlock *BB);
+  LLVM_ABI bool maybeMergeBasicBlockIntoOnlyPred(BasicBlock *BB);
+  LLVM_ABI void updateSSA(BasicBlock *BB, BasicBlock *NewBB,
+                          ValueToValueMapTy &ValueMapping);
+  LLVM_ABI void cloneInstructions(ValueToValueMapTy &ValueMapping,
+                                  BasicBlock::iterator BI,
+                                  BasicBlock::iterator BE, BasicBlock *NewBB,
+                                  BasicBlock *PredBB);
+  LLVM_ABI bool tryThreadEdge(BasicBlock *BB,
+                              const SmallVectorImpl<BasicBlock *> &PredBBs,
+                              BasicBlock *SuccBB);
+  LLVM_ABI void threadEdge(BasicBlock *BB,
+                           const SmallVectorImpl<BasicBlock *> &PredBBs,
+                           BasicBlock *SuccBB);
+  LLVM_ABI bool duplicateCondBranchOnPHIIntoPred(
       BasicBlock *BB, const SmallVectorImpl<BasicBlock *> &PredBBs);
 
-  bool computeValueKnownInPredecessorsImpl(
+  LLVM_ABI bool computeValueKnownInPredecessorsImpl(
       Value *V, BasicBlock *BB, jumpthreading::PredValueInfo &Result,
       jumpthreading::ConstantPreference Preference,
       SmallPtrSet<Value *, 4> &RecursionSet, Instruction *CxtI = nullptr);
@@ -145,29 +148,34 @@ class JumpThreadingPass : public PassInfoMixin<JumpThreadingPass> {
                                                RecursionSet, CxtI);
   }
 
-  Constant *evaluateOnPredecessorEdge(BasicBlock *BB, BasicBlock *PredPredBB,
-                                      Value *cond, const DataLayout &DL);
-  bool maybethreadThroughTwoBasicBlocks(BasicBlock *BB, Value *Cond);
-  void threadThroughTwoBasicBlocks(BasicBlock *PredPredBB, BasicBlock *PredBB,
-                                   BasicBlock *BB, BasicBlock *SuccBB);
-  bool processThreadableEdges(Value *Cond, BasicBlock *BB,
-                              jumpthreading::ConstantPreference Preference,
-                              Instruction *CxtI = nullptr);
-
-  bool processBranchOnPHI(PHINode *PN);
-  bool processBranchOnXOR(BinaryOperator *BO);
-  bool processImpliedCondition(BasicBlock *BB);
-
-  bool simplifyPartiallyRedundantLoad(LoadInst *LI);
-  void unfoldSelectInstr(BasicBlock *Pred, BasicBlock *BB, SelectInst *SI,
-                         PHINode *SIUse, unsigned Idx);
-
-  bool tryToUnfoldSelect(CmpInst *CondCmp, BasicBlock *BB);
-  bool tryToUnfoldSelect(SwitchInst *SI, BasicBlock *BB);
-  bool tryToUnfoldSelectInCurrBB(BasicBlock *BB);
-
-  bool processGuards(BasicBlock *BB);
-  bool threadGuard(BasicBlock *BB, IntrinsicInst *Guard, BranchInst *BI);
+  LLVM_ABI Constant *evaluateOnPredecessorEdge(BasicBlock *BB,
+                                               BasicBlock *PredPredBB,
+                                               Value *cond,
+                                               const DataLayout &DL);
+  LLVM_ABI bool maybethreadThroughTwoBasicBlocks(BasicBlock *BB, Value *Cond);
+  LLVM_ABI void threadThroughTwoBasicBlocks(BasicBlock *PredPredBB,
+                                            BasicBlock *PredBB, BasicBlock *BB,
+                                            BasicBlock *SuccBB);
+  LLVM_ABI bool
+  processThreadableEdges(Value *Cond, BasicBlock *BB,
+                         jumpthreading::ConstantPreference Preference,
+                         Instruction *CxtI = nullptr);
+
+  LLVM_ABI bool processBranchOnPHI(PHINode *PN);
+  LLVM_ABI bool processBranchOnXOR(BinaryOperator *BO);
+  LLVM_ABI bool processImpliedCondition(BasicBlock *BB);
+
+  LLVM_ABI bool simplifyPartiallyRedundantLoad(LoadInst *LI);
+  LLVM_ABI void unfoldSelectInstr(BasicBlock *Pred, BasicBlock *BB,
+                                  SelectInst *SI, PHINode *SIUse, unsigned Idx);
+
+  LLVM_ABI bool tryToUnfoldSelect(CmpInst *CondCmp, BasicBlock *BB);
+  LLVM_ABI bool tryToUnfoldSelect(SwitchInst *SI, BasicBlock *BB);
+  LLVM_ABI bool tryToUnfoldSelectInCurrBB(BasicBlock *BB);
+
+  LLVM_ABI bool processGuards(BasicBlock *BB);
+  LLVM_ABI bool threadGuard(BasicBlock *BB, IntrinsicInst *Guard,
+                            BranchInst *BI);
 
 private:
   BasicBlock *splitBlockPreds(BasicBlock *BB, ArrayRef<BasicBlock *> Preds,
diff --git a/llvm/include/llvm/Transforms/Scalar/LoopPassManager.h b/llvm/include/llvm/Transforms/Scalar/LoopPassManager.h
index e1e1cbfdbf7a4..79ccd63fd834c 100644
--- a/llvm/include/llvm/Transforms/Scalar/LoopPassManager.h
+++ b/llvm/include/llvm/Transforms/Scalar/LoopPassManager.h
@@ -40,8 +40,9 @@
 #include "llvm/Analysis/LoopAnalysisManager.h"
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Analysis/LoopNestAnalysis.h"
-#include "llvm/IR/PassManager.h"
 #include "llvm/IR/PassInstrumentation.h"
+#include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/LCSSA.h"
 #include "llvm/Transforms/Utils/LoopSimplify.h"
 #include "llvm/Transforms/Utils/LoopUtils.h"
@@ -91,11 +92,13 @@ class PassManager<Loop, LoopAnalysisManager, LoopStandardAnalysisResults &,
     return *this;
   }
 
-  PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM,
-                        LoopStandardAnalysisResults &AR, LPMUpdater &U);
+  LLVM_ABI PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM,
+                                 LoopStandardAnalysisResults &AR,
+                                 LPMUpdater &U);
 
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
   /// Add either a loop pass or a loop-nest pass to the pass manager. Append \p
   /// Pass to the list of loop passes if it has a dedicated \fn run() method for
   /// loops and to the list of loop-nest passes if the \fn run() method is for
@@ -154,12 +157,12 @@ class PassManager<Loop, LoopAnalysisManager, LoopStandardAnalysisResults &,
                 LoopStandardAnalysisResults &AR, LPMUpdater &U,
                 PassInstrumentation &PI);
 
-  PreservedAnalyses runWithLoopNestPasses(Loop &L, LoopAnalysisManager &AM,
-                                          LoopStandardAnalysisResults &AR,
-                                          LPMUpdater &U);
-  PreservedAnalyses runWithoutLoopNestPasses(Loop &L, LoopAnalysisManager &AM,
-                                             LoopStandardAnalysisResults &AR,
-                                             LPMUpdater &U);
+  LLVM_ABI PreservedAnalyses
+  runWithLoopNestPasses(Loop &L, LoopAnalysisManager &AM,
+                        LoopStandardAnalysisResults &AR, LPMUpdater &U);
+  LLVM_ABI PreservedAnalyses
+  runWithoutLoopNestPasses(Loop &L, LoopAnalysisManager &AM,
+                           LoopStandardAnalysisResults &AR, LPMUpdater &U);
 
 private:
   static const Loop &getLoopFromIR(Loop &L) { return L; }
@@ -413,9 +416,10 @@ class FunctionToLoopPassAdaptor
   }
 
   /// Runs the loop passes across every loop in the function.
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
   static bool isRequired() { return true; }
 
@@ -497,11 +501,11 @@ class PrintLoopPass : public PassInfoMixin<PrintLoopPass> {
   std::string Banner;
 
 public:
-  PrintLoopPass();
-  PrintLoopPass(raw_ostream &OS, const std::string &Banner = "");
+  LLVM_ABI PrintLoopPass();
+  LLVM_ABI PrintLoopPass(raw_ostream &OS, const std::string &Banner = "");
 
-  PreservedAnalyses run(Loop &L, LoopAnalysisManager &,
-                        LoopStandardAnalysisResults &, LPMUpdater &);
+  LLVM_ABI PreservedAnalyses run(Loop &L, LoopAnalysisManager &,
+                                 LoopStandardAnalysisResults &, LPMUpdater &);
 };
 }
 
diff --git a/llvm/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h b/llvm/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h
index 95ef0f73e8af5..7df903f15e4ec 100644
--- a/llvm/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h
+++ b/llvm/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h
@@ -16,6 +16,7 @@
 #define LLVM_TRANSFORMS_SCALAR_LOWEREXPECTINTRINSIC_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -29,7 +30,7 @@ struct LowerExpectIntrinsicPass : PassInfoMixin<LowerExpectIntrinsicPass> {
   /// of the probabilities and frequencies of the CFG. After running this pass,
   /// no more expect intrinsics remain, allowing the rest of the optimizer to
   /// ignore them.
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &);
 };
 
 }
diff --git a/llvm/include/llvm/Transforms/Scalar/SCCP.h b/llvm/include/llvm/Transforms/Scalar/SCCP.h
index 7803f008c618b..d45dca97d12d6 100644
--- a/llvm/include/llvm/Transforms/Scalar/SCCP.h
+++ b/llvm/include/llvm/Transforms/Scalar/SCCP.h
@@ -21,6 +21,7 @@
 #define LLVM_TRANSFORMS_SCALAR_SCCP_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class Function;
@@ -28,7 +29,7 @@ class Function;
 /// This pass performs function-level constant propagation and merging.
 class SCCPPass : public PassInfoMixin<SCCPPass> {
 public:
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/Transforms/Scalar/Scalarizer.h b/llvm/include/llvm/Transforms/Scalar/Scalarizer.h
index 401ca4d995348..12513c2a704f2 100644
--- a/llvm/include/llvm/Transforms/Scalar/Scalarizer.h
+++ b/llvm/include/llvm/Transforms/Scalar/Scalarizer.h
@@ -19,6 +19,7 @@
 #define LLVM_TRANSFORMS_SCALAR_SCALARIZER_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include <optional>
 
 namespace llvm {
@@ -55,7 +56,7 @@ class ScalarizerPass : public PassInfoMixin<ScalarizerPass> {
   ScalarizerPass() = default;
   ScalarizerPass(const ScalarizerPassOptions &Options) : Options(Options) {}
 
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 
   void setScalarizeVariableInsertExtract(bool Value) {
     Options.ScalarizeVariableInsertExtract = Value;
@@ -65,7 +66,7 @@ class ScalarizerPass : public PassInfoMixin<ScalarizerPass> {
 };
 
 /// Create a legacy pass manager instance of the Scalarizer pass
-FunctionPass *createScalarizerPass(
+LLVM_ABI FunctionPass *createScalarizerPass(
     const ScalarizerPassOptions &Options = ScalarizerPassOptions());
 }
 
diff --git a/llvm/include/llvm/Transforms/Scalar/SimplifyCFG.h b/llvm/include/llvm/Transforms/Scalar/SimplifyCFG.h
index 67db5031a4438..b2b7f4619da82 100644
--- a/llvm/include/llvm/Transforms/Scalar/SimplifyCFG.h
+++ b/llvm/include/llvm/Transforms/Scalar/SimplifyCFG.h
@@ -16,6 +16,7 @@
 
 #include "llvm/IR/Function.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/SimplifyCFGOptions.h"
 
 namespace llvm {
@@ -34,16 +35,17 @@ class SimplifyCFGPass : public PassInfoMixin<SimplifyCFGPass> {
   /// rather than optimal IR. That is, by default we bypass transformations that
   /// are likely to improve performance but make analysis for other passes more
   /// difficult.
-  SimplifyCFGPass();
+  LLVM_ABI SimplifyCFGPass();
 
   /// Construct a pass with optional optimizations.
-  SimplifyCFGPass(const SimplifyCFGOptions &PassOptions);
+  LLVM_ABI SimplifyCFGPass(const SimplifyCFGOptions &PassOptions);
 
   /// Run the pass over the function.
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 };
 
 }
diff --git a/llvm/include/llvm/Transforms/Utils.h b/llvm/include/llvm/Transforms/Utils.h
index ff306dbe35803..840e085379a1d 100644
--- a/llvm/include/llvm/Transforms/Utils.h
+++ b/llvm/include/llvm/Transforms/Utils.h
@@ -14,6 +14,8 @@
 #ifndef LLVM_TRANSFORMS_UTILS_H
 #define LLVM_TRANSFORMS_UTILS_H
 
+#include "llvm/Support/Compiler.h"
+
 namespace llvm {
 
 class ModulePass;
@@ -25,16 +27,16 @@ class Pass;
 // LowerInvoke - This pass removes invoke instructions, converting them to call
 // instructions.
 //
-FunctionPass *createLowerInvokePass();
-extern char &LowerInvokePassID;
+LLVM_ABI FunctionPass *createLowerInvokePass();
+LLVM_ABI extern char &LowerInvokePassID;
 
 //===----------------------------------------------------------------------===//
 //
 // LowerSwitch - This pass converts SwitchInst instructions into a sequence of
 // chained binary branch instructions.
 //
-FunctionPass *createLowerSwitchPass();
-extern char &LowerSwitchID;
+LLVM_ABI FunctionPass *createLowerSwitchPass();
+LLVM_ABI extern char &LowerSwitchID;
 
 //===----------------------------------------------------------------------===//
 //
@@ -43,7 +45,7 @@ extern char &LowerSwitchID;
 // variants, intended to run pre- and post-inlining, respectively. Only the
 // post-inlining variant is used with the legacy pass manager.
 //
-FunctionPass *createPostInlineEntryExitInstrumenterPass();
+LLVM_ABI FunctionPass *createPostInlineEntryExitInstrumenterPass();
 
 //===----------------------------------------------------------------------===//
 //
@@ -56,16 +58,16 @@ FunctionPass *createPostInlineEntryExitInstrumenterPass();
 // This pass obviously invalidates the CFG, but can update forward dominator
 // (set, immediate dominators, tree, and frontier) information.
 //
-FunctionPass *createBreakCriticalEdgesPass();
-extern char &BreakCriticalEdgesID;
+LLVM_ABI FunctionPass *createBreakCriticalEdgesPass();
+LLVM_ABI extern char &BreakCriticalEdgesID;
 
 //===----------------------------------------------------------------------===//
 //
 // LCSSA - This pass inserts phi nodes at loop boundaries to simplify other loop
 // optimizations.
 //
-Pass *createLCSSAPass();
-extern char &LCSSAID;
+LLVM_ABI Pass *createLCSSAPass();
+LLVM_ABI extern char &LCSSAID;
 
 //===----------------------------------------------------------------------===//
 //
@@ -79,7 +81,7 @@ extern char &LCSSAID;
 //   %Y = load i32* %X
 //   ret i32 %Y
 //
-FunctionPass *createPromoteMemoryToRegisterPass();
+LLVM_ABI FunctionPass *createPromoteMemoryToRegisterPass();
 
 //===----------------------------------------------------------------------===//
 //
@@ -87,7 +89,7 @@ FunctionPass *createPromoteMemoryToRegisterPass();
 // references. In basically undoes the PromoteMemoryToRegister pass to make cfg
 // hacking easier.
 //
-FunctionPass *createRegToMemWrapperPass();
+LLVM_ABI FunctionPass *createRegToMemWrapperPass();
 
 //===----------------------------------------------------------------------===//
 //
@@ -97,8 +99,8 @@ FunctionPass *createRegToMemWrapperPass();
 //
 //   AU.addRequiredID(LoopSimplifyID);
 //
-Pass *createLoopSimplifyPass();
-extern char &LoopSimplifyID;
+LLVM_ABI Pass *createLoopSimplifyPass();
+LLVM_ABI extern char &LoopSimplifyID;
 
 //===----------------------------------------------------------------------===//
 //
@@ -106,27 +108,27 @@ extern char &LoopSimplifyID;
 // blocks branch to N, and then N distributes control flow to all the original
 // exit blocks.
 //
-FunctionPass *createUnifyLoopExitsPass();
+LLVM_ABI FunctionPass *createUnifyLoopExitsPass();
 
 //===----------------------------------------------------------------------===//
 //
 // FixIrreducible - Convert each SCC with irreducible control-flow
 // into a natural loop.
 //
-FunctionPass *createFixIrreduciblePass();
+LLVM_ABI FunctionPass *createFixIrreduciblePass();
 
 //===----------------------------------------------------------------------===//
 //
 // CanonicalizeFreezeInLoops - Canonicalize freeze instructions in loops so they
 // don't block SCEV.
 //
-Pass *createCanonicalizeFreezeInLoopsPass();
+LLVM_ABI Pass *createCanonicalizeFreezeInLoopsPass();
 
 //===----------------------------------------------------------------------===//
 // LowerGlobalDtorsLegacy - Lower @llvm.global_dtors by creating wrapper
 // functions that are registered in @llvm.global_ctors and which contain a call
 // to `__cxa_atexit` to register their destructor functions.
-ModulePass *createLowerGlobalDtorsLegacyPass();
+LLVM_ABI ModulePass *createLowerGlobalDtorsLegacyPass();
 } // namespace llvm
 
 #endif
diff --git a/llvm/include/llvm/Transforms/Utils/AMDGPUEmitPrintf.h b/llvm/include/llvm/Transforms/Utils/AMDGPUEmitPrintf.h
index 55e92c37a1676..e7adf91b3f569 100644
--- a/llvm/include/llvm/Transforms/Utils/AMDGPUEmitPrintf.h
+++ b/llvm/include/llvm/Transforms/Utils/AMDGPUEmitPrintf.h
@@ -15,11 +15,12 @@
 #define LLVM_TRANSFORMS_UTILS_AMDGPUEMITPRINTF_H
 
 #include "llvm/IR/IRBuilder.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
-Value *emitAMDGPUPrintfCall(IRBuilder<> &Builder, ArrayRef<Value *> Args,
-                            bool isBuffered);
+LLVM_ABI Value *emitAMDGPUPrintfCall(IRBuilder<> &Builder,
+                                     ArrayRef<Value *> Args, bool isBuffered);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/ASanStackFrameLayout.h b/llvm/include/llvm/Transforms/Utils/ASanStackFrameLayout.h
index f87588db4ee2a..1360879b8b6c8 100644
--- a/llvm/include/llvm/Transforms/Utils/ASanStackFrameLayout.h
+++ b/llvm/include/llvm/Transforms/Utils/ASanStackFrameLayout.h
@@ -13,6 +13,7 @@
 #define LLVM_TRANSFORMS_UTILS_ASANSTACKFRAMELAYOUT_H
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -47,7 +48,7 @@ struct ASanStackFrameLayout {
   uint64_t FrameSize;       // Size of the frame in bytes.
 };
 
-ASanStackFrameLayout ComputeASanStackFrameLayout(
+LLVM_ABI ASanStackFrameLayout ComputeASanStackFrameLayout(
     // The array of stack variables. The elements may get reordered and changed.
     SmallVectorImpl<ASanStackVariableDescription> &Vars,
     // AddressSanitizer's shadow granularity. Usually 8, may also be 16, 32, 64.
@@ -58,19 +59,19 @@ ASanStackFrameLayout ComputeASanStackFrameLayout(
     uint64_t MinHeaderSize);
 
 // Compute frame description, see DescribeAddressIfStack in ASan runtime.
-SmallString<64> ComputeASanStackFrameDescription(
+LLVM_ABI SmallString<64> ComputeASanStackFrameDescription(
     const SmallVectorImpl<ASanStackVariableDescription> &Vars);
 
 // Returns shadow bytes with marked red zones. This shadow represents the state
 // if the stack frame when all local variables are inside of the own scope.
-SmallVector<uint8_t, 64>
+LLVM_ABI SmallVector<uint8_t, 64>
 GetShadowBytes(const SmallVectorImpl<ASanStackVariableDescription> &Vars,
                const ASanStackFrameLayout &Layout);
 
 // Returns shadow bytes with marked red zones and after scope. This shadow
 // represents the state if the stack frame when all local variables are outside
 // of the own scope.
-SmallVector<uint8_t, 64> GetShadowBytesAfterScope(
+LLVM_ABI SmallVector<uint8_t, 64> GetShadowBytesAfterScope(
     // The array of stack variables. The elements may get reordered and changed.
     const SmallVectorImpl<ASanStackVariableDescription> &Vars,
     const ASanStackFrameLayout &Layout);
diff --git a/llvm/include/llvm/Transforms/Utils/AssumeBundleBuilder.h b/llvm/include/llvm/Transforms/Utils/AssumeBundleBuilder.h
index 85c49d39098bc..eb91367dfdce0 100644
--- a/llvm/include/llvm/Transforms/Utils/AssumeBundleBuilder.h
+++ b/llvm/include/llvm/Transforms/Utils/AssumeBundleBuilder.h
@@ -19,6 +19,7 @@
 #include "llvm/Analysis/AssumeBundleQueries.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class AssumeInst;
@@ -27,13 +28,13 @@ class Instruction;
 class AssumptionCache;
 class DominatorTree;
 
-extern cl::opt<bool> EnableKnowledgeRetention;
+LLVM_ABI extern cl::opt<bool> EnableKnowledgeRetention;
 
 /// Build a call to llvm.assume to preserve informations that can be derived
 /// from the given instruction.
 /// If no information derived from \p I, this call returns null.
 /// The returned instruction is not inserted anywhere.
-AssumeInst *buildAssumeFromInst(Instruction *I);
+LLVM_ABI AssumeInst *buildAssumeFromInst(Instruction *I);
 
 /// Calls BuildAssumeFromInst and if the resulting llvm.assume is valid insert
 /// if before I. This is usually what need to be done to salvage the knowledge
@@ -43,35 +44,35 @@ AssumeInst *buildAssumeFromInst(Instruction *I);
 /// The DominatorTree can optionally be provided to enable cross-block
 /// reasoning.
 /// This returns if a change was made.
-bool salvageKnowledge(Instruction *I, AssumptionCache *AC = nullptr,
-                      DominatorTree *DT = nullptr);
+LLVM_ABI bool salvageKnowledge(Instruction *I, AssumptionCache *AC = nullptr,
+                               DominatorTree *DT = nullptr);
 
 /// Build and return a new assume created from the provided knowledge
 /// if the knowledge in the assume is fully redundant this will return nullptr
-AssumeInst *buildAssumeFromKnowledge(ArrayRef<RetainedKnowledge> Knowledge,
-                                     Instruction *CtxI,
-                                     AssumptionCache *AC = nullptr,
-                                     DominatorTree *DT = nullptr);
+LLVM_ABI AssumeInst *
+buildAssumeFromKnowledge(ArrayRef<RetainedKnowledge> Knowledge,
+                         Instruction *CtxI, AssumptionCache *AC = nullptr,
+                         DominatorTree *DT = nullptr);
 
 /// This pass attempts to minimize the number of assume without loosing any
 /// information.
 struct AssumeSimplifyPass : public PassInfoMixin<AssumeSimplifyPass> {
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 /// This pass will try to build an llvm.assume for every instruction in the
 /// function. Its main purpose is testing.
 struct AssumeBuilderPass : public PassInfoMixin<AssumeBuilderPass> {
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 /// canonicalize the RetainedKnowledge RK. it is assumed that RK is part of
 /// Assume. This will return an empty RetainedKnowledge if the knowledge is
 /// useless.
-RetainedKnowledge simplifyRetainedKnowledge(AssumeInst *Assume,
-                                            RetainedKnowledge RK,
-                                            AssumptionCache *AC,
-                                            DominatorTree *DT);
+LLVM_ABI RetainedKnowledge simplifyRetainedKnowledge(AssumeInst *Assume,
+                                                     RetainedKnowledge RK,
+                                                     AssumptionCache *AC,
+                                                     DominatorTree *DT);
 
 } // namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/BasicBlockUtils.h b/llvm/include/llvm/Transforms/Utils/BasicBlockUtils.h
index adc1851c2ec2f..979f3b3eb72ff 100644
--- a/llvm/include/llvm/Transforms/Utils/BasicBlockUtils.h
+++ b/llvm/include/llvm/Transforms/Utils/BasicBlockUtils.h
@@ -20,6 +20,7 @@
 #include "llvm/ADT/SetVector.h"
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/Dominators.h"
+#include "llvm/Support/Compiler.h"
 #include <cassert>
 
 namespace llvm {
@@ -46,13 +47,14 @@ class Value;
 /// instruction. If \p Updates is specified, collect all necessary DT updates
 /// into this vector. If \p KeepOneInputPHIs is true, one-input Phis in
 /// successors of blocks being deleted will be preserved.
-void detachDeadBlocks(ArrayRef <BasicBlock *> BBs,
-                      SmallVectorImpl<DominatorTree::UpdateType> *Updates,
-                      bool KeepOneInputPHIs = false);
+LLVM_ABI void
+detachDeadBlocks(ArrayRef<BasicBlock *> BBs,
+                 SmallVectorImpl<DominatorTree::UpdateType> *Updates,
+                 bool KeepOneInputPHIs = false);
 
 /// Delete the specified block, which must have no predecessors.
-void DeleteDeadBlock(BasicBlock *BB, DomTreeUpdater *DTU = nullptr,
-                     bool KeepOneInputPHIs = false);
+LLVM_ABI void DeleteDeadBlock(BasicBlock *BB, DomTreeUpdater *DTU = nullptr,
+                              bool KeepOneInputPHIs = false);
 
 /// Delete the specified blocks from \p BB. The set of deleted blocks must have
 /// no predecessors that are not being deleted themselves. \p BBs must have no
@@ -60,29 +62,32 @@ void DeleteDeadBlock(BasicBlock *BB, DomTreeUpdater *DTU = nullptr,
 /// relevant loop info updates should be done before this function is called.
 /// If \p KeepOneInputPHIs is true, one-input Phis in successors of blocks
 /// being deleted will be preserved.
-void DeleteDeadBlocks(ArrayRef <BasicBlock *> BBs,
-                      DomTreeUpdater *DTU = nullptr,
-                      bool KeepOneInputPHIs = false);
+LLVM_ABI void DeleteDeadBlocks(ArrayRef<BasicBlock *> BBs,
+                               DomTreeUpdater *DTU = nullptr,
+                               bool KeepOneInputPHIs = false);
 
 /// Delete all basic blocks from \p F that are not reachable from its entry
 /// node. If \p KeepOneInputPHIs is true, one-input Phis in successors of
 /// blocks being deleted will be preserved.
-bool EliminateUnreachableBlocks(Function &F, DomTreeUpdater *DTU = nullptr,
-                                bool KeepOneInputPHIs = false);
+LLVM_ABI bool EliminateUnreachableBlocks(Function &F,
+                                         DomTreeUpdater *DTU = nullptr,
+                                         bool KeepOneInputPHIs = false);
 
 /// We know that BB has one predecessor. If there are any single-entry PHI nodes
 /// in it, fold them away. This handles the case when all entries to the PHI
 /// nodes in a block are guaranteed equal, such as when the block has exactly
 /// one predecessor.
-bool FoldSingleEntryPHINodes(BasicBlock *BB,
-                             MemoryDependenceResults *MemDep = nullptr);
+LLVM_ABI bool
+FoldSingleEntryPHINodes(BasicBlock *BB,
+                        MemoryDependenceResults *MemDep = nullptr);
 
 /// Examine each PHI in the given block and delete it if it is dead. Also
 /// recursively delete any operands that become dead as a result. This includes
 /// tracing the def-use list from the PHI to see if it is ultimately unused or
 /// if it reaches an unused cycle. Return true if any PHIs were deleted.
-bool DeleteDeadPHIs(BasicBlock *BB, const TargetLibraryInfo *TLI = nullptr,
-                    MemorySSAUpdater *MSSAU = nullptr);
+LLVM_ABI bool DeleteDeadPHIs(BasicBlock *BB,
+                             const TargetLibraryInfo *TLI = nullptr,
+                             MemorySSAUpdater *MSSAU = nullptr);
 
 /// Attempts to merge a block into its predecessor, if possible. The return
 /// value indicates success or failure.
@@ -93,12 +98,11 @@ bool DeleteDeadPHIs(BasicBlock *BB, const TargetLibraryInfo *TLI = nullptr,
 /// BB, and BB will still be merged into its predecessor and removed.
 /// If \p DT is not nullptr, update it directly; in that case, DTU must be
 /// nullptr.
-bool MergeBlockIntoPredecessor(BasicBlock *BB, DomTreeUpdater *DTU = nullptr,
-                               LoopInfo *LI = nullptr,
-                               MemorySSAUpdater *MSSAU = nullptr,
-                               MemoryDependenceResults *MemDep = nullptr,
-                               bool PredecessorWithTwoSuccessors = false,
-                               DominatorTree *DT = nullptr);
+LLVM_ABI bool MergeBlockIntoPredecessor(
+    BasicBlock *BB, DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr,
+    MemorySSAUpdater *MSSAU = nullptr,
+    MemoryDependenceResults *MemDep = nullptr,
+    bool PredecessorWithTwoSuccessors = false, DominatorTree *DT = nullptr);
 
 /// Merge block(s) sucessors, if possible. Return true if at least two
 /// of the blocks were merged together.
@@ -107,36 +111,36 @@ bool MergeBlockIntoPredecessor(BasicBlock *BB, DomTreeUpdater *DTU = nullptr,
 /// must be in L. In addition, This utility calls on another utility:
 /// MergeBlockIntoPredecessor. Blocks are successfully merged when the call to
 /// MergeBlockIntoPredecessor returns true.
-bool MergeBlockSuccessorsIntoGivenBlocks(
+LLVM_ABI bool MergeBlockSuccessorsIntoGivenBlocks(
     SmallPtrSetImpl<BasicBlock *> &MergeBlocks, Loop *L = nullptr,
     DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr);
 
 /// Try to remove redundant dbg.value instructions from given basic block.
 /// Returns true if at least one instruction was removed. Remove redundant
 /// pseudo ops when RemovePseudoOp is true.
-bool RemoveRedundantDbgInstrs(BasicBlock *BB);
+LLVM_ABI bool RemoveRedundantDbgInstrs(BasicBlock *BB);
 
 /// Replace all uses of an instruction (specified by BI) with a value, then
 /// remove and delete the original instruction.
-void ReplaceInstWithValue(BasicBlock::iterator &BI, Value *V);
+LLVM_ABI void ReplaceInstWithValue(BasicBlock::iterator &BI, Value *V);
 
 /// Replace the instruction specified by BI with the instruction specified by I.
 /// Copies DebugLoc from BI to I, if I doesn't already have a DebugLoc. The
 /// original instruction is deleted and BI is updated to point to the new
 /// instruction.
-void ReplaceInstWithInst(BasicBlock *BB, BasicBlock::iterator &BI,
-                         Instruction *I);
+LLVM_ABI void ReplaceInstWithInst(BasicBlock *BB, BasicBlock::iterator &BI,
+                                  Instruction *I);
 
 /// Replace the instruction specified by From with the instruction specified by
 /// To. Copies DebugLoc from BI to I, if I doesn't already have a DebugLoc.
-void ReplaceInstWithInst(Instruction *From, Instruction *To);
+LLVM_ABI void ReplaceInstWithInst(Instruction *From, Instruction *To);
 
 /// Check if we can prove that all paths starting from this block converge
 /// to a block that either has a @llvm.experimental.deoptimize call
 /// prior to its terminating return instruction or is terminated by unreachable.
 /// All blocks in the traversed sequence must have an unique successor, maybe
 /// except for the last one.
-bool IsBlockFollowedByDeoptOrUnreachable(const BasicBlock *BB);
+LLVM_ABI bool IsBlockFollowedByDeoptOrUnreachable(const BasicBlock *BB);
 
 /// Option class for critical edge splitting.
 ///
@@ -192,8 +196,9 @@ struct CriticalEdgeSplittingOptions {
 /// exit block. This function inserts the new PHIs, as needed. Preds is a list
 /// of preds inside the loop, SplitBB is the new loop exit block, and DestBB is
 /// the old loop exit, now the successor of SplitBB.
-void createPHIsForSplitLoopExit(ArrayRef<BasicBlock *> Preds,
-                                BasicBlock *SplitBB, BasicBlock *DestBB);
+LLVM_ABI void createPHIsForSplitLoopExit(ArrayRef<BasicBlock *> Preds,
+                                         BasicBlock *SplitBB,
+                                         BasicBlock *DestBB);
 
 /// If this edge is a critical edge, insert a new node to split the critical
 /// edge. This will update the analyses passed in through the option struct.
@@ -211,17 +216,19 @@ void createPHIsForSplitLoopExit(ArrayRef<BasicBlock *> Preds,
 /// IndirectBrInst.  Splitting these edges will almost always create an invalid
 /// program because the address of the new block won't be the one that is jumped
 /// to.
-BasicBlock *SplitCriticalEdge(Instruction *TI, unsigned SuccNum,
-                              const CriticalEdgeSplittingOptions &Options =
-                                  CriticalEdgeSplittingOptions(),
-                              const Twine &BBName = "");
+LLVM_ABI BasicBlock *
+SplitCriticalEdge(Instruction *TI, unsigned SuccNum,
+                  const CriticalEdgeSplittingOptions &Options =
+                      CriticalEdgeSplittingOptions(),
+                  const Twine &BBName = "");
 
 /// If it is known that an edge is critical, SplitKnownCriticalEdge can be
 /// called directly, rather than calling SplitCriticalEdge first.
-BasicBlock *SplitKnownCriticalEdge(Instruction *TI, unsigned SuccNum,
-                                   const CriticalEdgeSplittingOptions &Options =
-                                       CriticalEdgeSplittingOptions(),
-                                   const Twine &BBName = "");
+LLVM_ABI BasicBlock *
+SplitKnownCriticalEdge(Instruction *TI, unsigned SuccNum,
+                       const CriticalEdgeSplittingOptions &Options =
+                           CriticalEdgeSplittingOptions(),
+                       const Twine &BBName = "");
 
 /// If an edge from Src to Dst is critical, split the edge and return true,
 /// otherwise return false. This method requires that there be an edge between
@@ -242,33 +249,35 @@ SplitCriticalEdge(BasicBlock *Src, BasicBlock *Dst,
 
 /// Loop over all of the edges in the CFG, breaking critical edges as they are
 /// found. Returns the number of broken edges.
-unsigned SplitAllCriticalEdges(Function &F,
-                               const CriticalEdgeSplittingOptions &Options =
-                                   CriticalEdgeSplittingOptions());
+LLVM_ABI unsigned
+SplitAllCriticalEdges(Function &F, const CriticalEdgeSplittingOptions &Options =
+                                       CriticalEdgeSplittingOptions());
 
 /// Split the edge connecting the specified blocks, and return the newly created
 /// basic block between \p From and \p To.
-BasicBlock *SplitEdge(BasicBlock *From, BasicBlock *To,
-                      DominatorTree *DT = nullptr, LoopInfo *LI = nullptr,
-                      MemorySSAUpdater *MSSAU = nullptr,
-                      const Twine &BBName = "");
+LLVM_ABI BasicBlock *SplitEdge(BasicBlock *From, BasicBlock *To,
+                               DominatorTree *DT = nullptr,
+                               LoopInfo *LI = nullptr,
+                               MemorySSAUpdater *MSSAU = nullptr,
+                               const Twine &BBName = "");
 
 /// Sets the unwind edge of an instruction to a particular successor.
-void setUnwindEdgeTo(Instruction *TI, BasicBlock *Succ);
+LLVM_ABI void setUnwindEdgeTo(Instruction *TI, BasicBlock *Succ);
 
 /// Replaces all uses of OldPred with the NewPred block in all PHINodes in a
 /// block.
-void updatePhiNodes(BasicBlock *DestBB, BasicBlock *OldPred,
-                    BasicBlock *NewPred, PHINode *Until = nullptr);
+LLVM_ABI void updatePhiNodes(BasicBlock *DestBB, BasicBlock *OldPred,
+                             BasicBlock *NewPred, PHINode *Until = nullptr);
 
 /// Split the edge connect the specficed blocks in the case that \p Succ is an
 /// Exception Handling Block
-BasicBlock *ehAwareSplitEdge(BasicBlock *BB, BasicBlock *Succ,
-                             LandingPadInst *OriginalPad = nullptr,
-                             PHINode *LandingPadReplacement = nullptr,
-                             const CriticalEdgeSplittingOptions &Options =
-                                 CriticalEdgeSplittingOptions(),
-                             const Twine &BBName = "");
+LLVM_ABI BasicBlock *
+ehAwareSplitEdge(BasicBlock *BB, BasicBlock *Succ,
+                 LandingPadInst *OriginalPad = nullptr,
+                 PHINode *LandingPadReplacement = nullptr,
+                 const CriticalEdgeSplittingOptions &Options =
+                     CriticalEdgeSplittingOptions(),
+                 const Twine &BBName = "");
 
 /// Split the specified block at the specified instruction.
 ///
@@ -280,10 +289,10 @@ BasicBlock *ehAwareSplitEdge(BasicBlock *BB, BasicBlock *Succ,
 /// branch. The new block with name \p BBName is returned.
 ///
 /// FIXME: deprecated, switch to the DomTreeUpdater-based one.
-BasicBlock *SplitBlock(BasicBlock *Old, BasicBlock::iterator SplitPt, DominatorTree *DT,
-                       LoopInfo *LI = nullptr,
-                       MemorySSAUpdater *MSSAU = nullptr,
-                       const Twine &BBName = "", bool Before = false);
+LLVM_ABI BasicBlock *SplitBlock(BasicBlock *Old, BasicBlock::iterator SplitPt,
+                                DominatorTree *DT, LoopInfo *LI = nullptr,
+                                MemorySSAUpdater *MSSAU = nullptr,
+                                const Twine &BBName = "", bool Before = false);
 inline BasicBlock *SplitBlock(BasicBlock *Old, Instruction *SplitPt, DominatorTree *DT,
                        LoopInfo *LI = nullptr,
                        MemorySSAUpdater *MSSAU = nullptr,
@@ -299,10 +308,11 @@ inline BasicBlock *SplitBlock(BasicBlock *Old, Instruction *SplitPt, DominatorTr
 /// Everything before \p SplitPt stays in \p Old and everything starting with \p
 /// SplitPt moves to a new block. The two blocks are joined by an unconditional
 /// branch. The new block with name \p BBName is returned.
-BasicBlock *SplitBlock(BasicBlock *Old, BasicBlock::iterator SplitPt,
-                       DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr,
-                       MemorySSAUpdater *MSSAU = nullptr,
-                       const Twine &BBName = "", bool Before = false);
+LLVM_ABI BasicBlock *SplitBlock(BasicBlock *Old, BasicBlock::iterator SplitPt,
+                                DomTreeUpdater *DTU = nullptr,
+                                LoopInfo *LI = nullptr,
+                                MemorySSAUpdater *MSSAU = nullptr,
+                                const Twine &BBName = "", bool Before = false);
 inline BasicBlock *SplitBlock(BasicBlock *Old, Instruction *SplitPt,
                        DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr,
                        MemorySSAUpdater *MSSAU = nullptr,
@@ -315,9 +325,11 @@ inline BasicBlock *SplitBlock(BasicBlock *Old, Instruction *SplitPt,
 /// instructions after \p SplitPt stay in the old block. The new block and the
 /// old block are joined by inserting an unconditional branch to the end of the
 /// new block. The new block with name \p BBName is returned.
-BasicBlock *splitBlockBefore(BasicBlock *Old, BasicBlock::iterator SplitPt,
-                             DomTreeUpdater *DTU, LoopInfo *LI,
-                             MemorySSAUpdater *MSSAU, const Twine &BBName = "");
+LLVM_ABI BasicBlock *splitBlockBefore(BasicBlock *Old,
+                                      BasicBlock::iterator SplitPt,
+                                      DomTreeUpdater *DTU, LoopInfo *LI,
+                                      MemorySSAUpdater *MSSAU,
+                                      const Twine &BBName = "");
 inline BasicBlock *splitBlockBefore(BasicBlock *Old, Instruction *SplitPt,
                              DomTreeUpdater *DTU, LoopInfo *LI,
                              MemorySSAUpdater *MSSAU, const Twine &BBName = "") {
@@ -340,11 +352,10 @@ inline BasicBlock *splitBlockBefore(BasicBlock *Old, Instruction *SplitPt,
 /// split is an exit of a loop with other exits).
 ///
 /// FIXME: deprecated, switch to the DomTreeUpdater-based one.
-BasicBlock *SplitBlockPredecessors(BasicBlock *BB, ArrayRef<BasicBlock *> Preds,
-                                   const char *Suffix, DominatorTree *DT,
-                                   LoopInfo *LI = nullptr,
-                                   MemorySSAUpdater *MSSAU = nullptr,
-                                   bool PreserveLCSSA = false);
+LLVM_ABI BasicBlock *SplitBlockPredecessors(
+    BasicBlock *BB, ArrayRef<BasicBlock *> Preds, const char *Suffix,
+    DominatorTree *DT, LoopInfo *LI = nullptr,
+    MemorySSAUpdater *MSSAU = nullptr, bool PreserveLCSSA = false);
 
 /// This method introduces at least one new basic block into the function and
 /// moves some of the predecessors of BB to be predecessors of the new block.
@@ -360,12 +371,10 @@ BasicBlock *SplitBlockPredecessors(BasicBlock *BB, ArrayRef<BasicBlock *> Preds,
 /// no other analyses. In particular, it does not preserve LoopSimplify
 /// (because it's complicated to handle the case where one of the edges being
 /// split is an exit of a loop with other exits).
-BasicBlock *SplitBlockPredecessors(BasicBlock *BB, ArrayRef<BasicBlock *> Preds,
-                                   const char *Suffix,
-                                   DomTreeUpdater *DTU = nullptr,
-                                   LoopInfo *LI = nullptr,
-                                   MemorySSAUpdater *MSSAU = nullptr,
-                                   bool PreserveLCSSA = false);
+LLVM_ABI BasicBlock *SplitBlockPredecessors(
+    BasicBlock *BB, ArrayRef<BasicBlock *> Preds, const char *Suffix,
+    DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr,
+    MemorySSAUpdater *MSSAU = nullptr, bool PreserveLCSSA = false);
 
 /// This method transforms the landing pad, OrigBB, by introducing two new basic
 /// blocks into the function. One of those new basic blocks gets the
@@ -378,7 +387,7 @@ BasicBlock *SplitBlockPredecessors(BasicBlock *BB, ArrayRef<BasicBlock *> Preds,
 /// no other analyses. In particular, it does not preserve LoopSimplify
 /// (because it's complicated to handle the case where one of the edges being
 /// split is an exit of a loop with other exits).
-void SplitLandingPadPredecessors(
+LLVM_ABI void SplitLandingPadPredecessors(
     BasicBlock *OrigBB, ArrayRef<BasicBlock *> Preds, const char *Suffix,
     const char *Suffix2, SmallVectorImpl<BasicBlock *> &NewBBs,
     DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr,
@@ -388,9 +397,9 @@ void SplitLandingPadPredecessors(
 /// which ends in an unconditional branch. If the return instruction returns a
 /// value defined by a PHI, propagate the right value into the return. It
 /// returns the new return instruction in the predecessor.
-ReturnInst *FoldReturnIntoUncondBranch(ReturnInst *RI, BasicBlock *BB,
-                                       BasicBlock *Pred,
-                                       DomTreeUpdater *DTU = nullptr);
+LLVM_ABI ReturnInst *FoldReturnIntoUncondBranch(ReturnInst *RI, BasicBlock *BB,
+                                                BasicBlock *Pred,
+                                                DomTreeUpdater *DTU = nullptr);
 
 /// Split the containing block at the specified instruction - everything before
 /// SplitBefore stays in the old basic block, and the rest of the instructions
@@ -413,12 +422,11 @@ ReturnInst *FoldReturnIntoUncondBranch(ReturnInst *RI, BasicBlock *BB,
 /// Returns the NewBasicBlock's terminator.
 ///
 /// Updates DTU and LI if given.
-Instruction *SplitBlockAndInsertIfThen(Value *Cond, BasicBlock::iterator SplitBefore,
-                                       bool Unreachable,
-                                       MDNode *BranchWeights = nullptr,
-                                       DomTreeUpdater *DTU = nullptr,
-                                       LoopInfo *LI = nullptr,
-                                       BasicBlock *ThenBlock = nullptr);
+LLVM_ABI Instruction *
+SplitBlockAndInsertIfThen(Value *Cond, BasicBlock::iterator SplitBefore,
+                          bool Unreachable, MDNode *BranchWeights = nullptr,
+                          DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr,
+                          BasicBlock *ThenBlock = nullptr);
 
 inline Instruction *SplitBlockAndInsertIfThen(Value *Cond, Instruction *SplitBefore,
                                        bool Unreachable,
@@ -433,12 +441,11 @@ inline Instruction *SplitBlockAndInsertIfThen(Value *Cond, Instruction *SplitBef
 
 /// Similar to SplitBlockAndInsertIfThen, but the inserted block is on the false
 /// path of the branch.
-Instruction *SplitBlockAndInsertIfElse(Value *Cond, BasicBlock::iterator SplitBefore,
-                                       bool Unreachable,
-                                       MDNode *BranchWeights = nullptr,
-                                       DomTreeUpdater *DTU = nullptr,
-                                       LoopInfo *LI = nullptr,
-                                       BasicBlock *ElseBlock = nullptr);
+LLVM_ABI Instruction *
+SplitBlockAndInsertIfElse(Value *Cond, BasicBlock::iterator SplitBefore,
+                          bool Unreachable, MDNode *BranchWeights = nullptr,
+                          DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr,
+                          BasicBlock *ElseBlock = nullptr);
 
 inline Instruction *SplitBlockAndInsertIfElse(Value *Cond, Instruction *SplitBefore,
                                        bool Unreachable,
@@ -467,13 +474,10 @@ inline Instruction *SplitBlockAndInsertIfElse(Value *Cond, Instruction *SplitBef
 ///   Tail
 ///
 /// Updates DT if given.
-void SplitBlockAndInsertIfThenElse(Value *Cond,
-                                   BasicBlock::iterator SplitBefore,
-                                   Instruction **ThenTerm,
-                                   Instruction **ElseTerm,
-                                   MDNode *BranchWeights = nullptr,
-                                   DomTreeUpdater *DTU = nullptr,
-                                   LoopInfo *LI = nullptr);
+LLVM_ABI void SplitBlockAndInsertIfThenElse(
+    Value *Cond, BasicBlock::iterator SplitBefore, Instruction **ThenTerm,
+    Instruction **ElseTerm, MDNode *BranchWeights = nullptr,
+    DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr);
 
 inline void SplitBlockAndInsertIfThenElse(Value *Cond, Instruction *SplitBefore,
                                    Instruction **ThenTerm,
@@ -513,15 +517,11 @@ inline void SplitBlockAndInsertIfThenElse(Value *Cond, Instruction *SplitBefore,
 /// caller must ensure that Tail is reachable from Head.
 /// Returns the newly created blocks in \p ThenBlock and \p ElseBlock.
 /// Updates DTU and LI if given.
-void SplitBlockAndInsertIfThenElse(Value *Cond,
-                                   BasicBlock::iterator SplitBefore,
-                                   BasicBlock **ThenBlock,
-                                   BasicBlock **ElseBlock,
-                                   bool UnreachableThen = false,
-                                   bool UnreachableElse = false,
-                                   MDNode *BranchWeights = nullptr,
-                                   DomTreeUpdater *DTU = nullptr,
-                                   LoopInfo *LI = nullptr);
+LLVM_ABI void SplitBlockAndInsertIfThenElse(
+    Value *Cond, BasicBlock::iterator SplitBefore, BasicBlock **ThenBlock,
+    BasicBlock **ElseBlock, bool UnreachableThen = false,
+    bool UnreachableElse = false, MDNode *BranchWeights = nullptr,
+    DomTreeUpdater *DTU = nullptr, LoopInfo *LI = nullptr);
 
 inline void SplitBlockAndInsertIfThenElse(Value *Cond, Instruction *SplitBefore,
                                    BasicBlock **ThenBlock,
@@ -539,7 +539,7 @@ inline void SplitBlockAndInsertIfThenElse(Value *Cond, Instruction *SplitBefore,
 /// that \p End is assumed > 0, and thus not checked on entry) at \p
 /// SplitBefore.  Returns the first insert point in the loop body, and the
 /// PHINode for the induction variable (i.e. "i" above).
-std::pair<Instruction*, Value*>
+LLVM_ABI std::pair<Instruction *, Value *>
 SplitBlockAndInsertSimpleForLoop(Value *End, BasicBlock::iterator SplitBefore);
 
 /// Utility function for performing a given action on each lane of a vector
@@ -550,7 +550,7 @@ SplitBlockAndInsertSimpleForLoop(Value *End, BasicBlock::iterator SplitBefore);
 /// IRBuilder whose insert point is correctly set for instantiating the
 /// given index, and a value which is (at runtime) the index to access.
 /// This index *may* be a constant.
-void SplitBlockAndInsertForEachLane(
+LLVM_ABI void SplitBlockAndInsertForEachLane(
     ElementCount EC, Type *IndexTy, BasicBlock::iterator InsertBefore,
     std::function<void(IRBuilderBase &, Value *)> Func);
 
@@ -562,7 +562,7 @@ void SplitBlockAndInsertForEachLane(
 /// arguments an IRBuilder whose insert point is correctly set for instantiating
 /// the given index, and a value which is (at runtime) the index to access. This
 /// index *may* be a constant.
-void SplitBlockAndInsertForEachLane(
+LLVM_ABI void SplitBlockAndInsertForEachLane(
     Value *End, BasicBlock::iterator InsertBefore,
     std::function<void(IRBuilderBase &, Value *)> Func);
 
@@ -574,8 +574,8 @@ void SplitBlockAndInsertForEachLane(
 ///
 /// This does no checking to see if the true/false blocks have large or unsavory
 /// instructions in them.
-BranchInst *GetIfCondition(BasicBlock *BB, BasicBlock *&IfTrue,
-                           BasicBlock *&IfFalse);
+LLVM_ABI BranchInst *GetIfCondition(BasicBlock *BB, BasicBlock *&IfTrue,
+                                    BasicBlock *&IfFalse);
 
 // Split critical edges where the source of the edge is an indirectbr
 // instruction. This isn't always possible, but we can handle some easy cases.
@@ -598,17 +598,18 @@ BranchInst *GetIfCondition(BasicBlock *BB, BasicBlock *&IfTrue,
 // If BPI and BFI aren't non-null, BPI/BFI will be updated accordingly.
 // When `IgnoreBlocksWithoutPHI` is set to `true` critical edges leading to a
 // block without phi-instructions will not be split.
-bool SplitIndirectBrCriticalEdges(Function &F, bool IgnoreBlocksWithoutPHI,
-                                  BranchProbabilityInfo *BPI = nullptr,
-                                  BlockFrequencyInfo *BFI = nullptr);
+LLVM_ABI bool SplitIndirectBrCriticalEdges(Function &F,
+                                           bool IgnoreBlocksWithoutPHI,
+                                           BranchProbabilityInfo *BPI = nullptr,
+                                           BlockFrequencyInfo *BFI = nullptr);
 
 // Utility function for inverting branch condition and for swapping its
 // successors
-void InvertBranch(BranchInst *PBI, IRBuilderBase &Builder);
+LLVM_ABI void InvertBranch(BranchInst *PBI, IRBuilderBase &Builder);
 
 // Check whether the function only has simple terminator:
 // br/brcond/unreachable/ret
-bool hasOnlySimpleTerminator(const Function &F);
+LLVM_ABI bool hasOnlySimpleTerminator(const Function &F);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/BuildLibCalls.h b/llvm/include/llvm/Transforms/Utils/BuildLibCalls.h
index 50f695dbe6c07..f53e7d056ca9f 100644
--- a/llvm/include/llvm/Transforms/Utils/BuildLibCalls.h
+++ b/llvm/include/llvm/Transforms/Utils/BuildLibCalls.h
@@ -15,6 +15,7 @@
 #define LLVM_TRANSFORMS_UTILS_BUILDLIBCALLS_H
 
 #include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
   class Value;
@@ -28,17 +29,22 @@ namespace llvm {
   /// If the library function is unavailable, this doesn't modify it.
   ///
   /// Returns true if any attributes were set and false otherwise.
-  bool inferNonMandatoryLibFuncAttrs(Module *M, StringRef Name,
-                                     const TargetLibraryInfo &TLI);
-  bool inferNonMandatoryLibFuncAttrs(Function &F, const TargetLibraryInfo &TLI);
+  LLVM_ABI bool inferNonMandatoryLibFuncAttrs(Module *M, StringRef Name,
+                                              const TargetLibraryInfo &TLI);
+  LLVM_ABI bool inferNonMandatoryLibFuncAttrs(Function &F,
+                                              const TargetLibraryInfo &TLI);
 
   /// Calls getOrInsertFunction() and then makes sure to add mandatory
   /// argument attributes.
-  FunctionCallee getOrInsertLibFunc(Module *M, const TargetLibraryInfo &TLI,
-                                    LibFunc TheLibFunc, FunctionType *T,
-                                    AttributeList AttributeList);
-  FunctionCallee getOrInsertLibFunc(Module *M, const TargetLibraryInfo &TLI,
-                                    LibFunc TheLibFunc, FunctionType *T);
+  LLVM_ABI FunctionCallee getOrInsertLibFunc(Module *M,
+                                             const TargetLibraryInfo &TLI,
+                                             LibFunc TheLibFunc,
+                                             FunctionType *T,
+                                             AttributeList AttributeList);
+  LLVM_ABI FunctionCallee getOrInsertLibFunc(Module *M,
+                                             const TargetLibraryInfo &TLI,
+                                             LibFunc TheLibFunc,
+                                             FunctionType *T);
   template <typename... ArgsTy>
   FunctionCallee getOrInsertLibFunc(Module *M, const TargetLibraryInfo &TLI,
                                LibFunc TheLibFunc, AttributeList AttributeList,
@@ -67,219 +73,238 @@ namespace llvm {
   // function signatures; it does not apply other relevant attributes for
   // function signatures, including sign/zero-extension for arguments and return
   // values.
-  void markRegisterParameterAttributes(Function *F);
+  LLVM_ABI void markRegisterParameterAttributes(Function *F);
 
   /// Check whether the library function is available on target and also that
   /// it in the current Module is a Function with the right type.
-  bool isLibFuncEmittable(const Module *M, const TargetLibraryInfo *TLI,
-                          LibFunc TheLibFunc);
-  bool isLibFuncEmittable(const Module *M, const TargetLibraryInfo *TLI,
-                          StringRef Name);
+  LLVM_ABI bool isLibFuncEmittable(const Module *M,
+                                   const TargetLibraryInfo *TLI,
+                                   LibFunc TheLibFunc);
+  LLVM_ABI bool isLibFuncEmittable(const Module *M,
+                                   const TargetLibraryInfo *TLI,
+                                   StringRef Name);
 
   /// Check whether the overloaded floating point function
   /// corresponding to \a Ty is available.
-  bool hasFloatFn(const Module *M, const TargetLibraryInfo *TLI, Type *Ty,
-                  LibFunc DoubleFn, LibFunc FloatFn, LibFunc LongDoubleFn);
+  LLVM_ABI bool hasFloatFn(const Module *M, const TargetLibraryInfo *TLI,
+                           Type *Ty, LibFunc DoubleFn, LibFunc FloatFn,
+                           LibFunc LongDoubleFn);
 
   /// Get the name of the overloaded floating point function
   /// corresponding to \a Ty. Return the LibFunc in \a TheLibFunc.
-  StringRef getFloatFn(const Module *M, const TargetLibraryInfo *TLI, Type *Ty,
-                       LibFunc DoubleFn, LibFunc FloatFn, LibFunc LongDoubleFn,
-                       LibFunc &TheLibFunc);
+  LLVM_ABI StringRef getFloatFn(const Module *M, const TargetLibraryInfo *TLI,
+                                Type *Ty, LibFunc DoubleFn, LibFunc FloatFn,
+                                LibFunc LongDoubleFn, LibFunc &TheLibFunc);
 
   /// Emit a call to the strlen function to the builder, for the specified
   /// pointer. Ptr is required to be some pointer type, and the return value has
   /// 'size_t' type.
-  Value *emitStrLen(Value *Ptr, IRBuilderBase &B, const DataLayout &DL,
-                    const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStrLen(Value *Ptr, IRBuilderBase &B, const DataLayout &DL,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the wcslen function to the builder, for the specified
   /// pointer. Ptr is required to be some pointer type, and the return value has
   /// 'size_t' type.
-  Value *emitWcsLen(Value *Ptr, IRBuilderBase &B, const DataLayout &DL,
-                    const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitWcsLen(Value *Ptr, IRBuilderBase &B, const DataLayout &DL,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the strdup function to the builder, for the specified
   /// pointer. Ptr is required to be some pointer type, and the return value has
   /// 'i8*' type.
-  Value *emitStrDup(Value *Ptr, IRBuilderBase &B, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStrDup(Value *Ptr, IRBuilderBase &B,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the strchr function to the builder, for the specified
   /// pointer and character. Ptr is required to be some pointer type, and the
   /// return value has 'i8*' type.
-  Value *emitStrChr(Value *Ptr, char C, IRBuilderBase &B,
-                    const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStrChr(Value *Ptr, char C, IRBuilderBase &B,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the strncmp function to the builder.
-  Value *emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B,
-                     const DataLayout &DL, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len,
+                              IRBuilderBase &B, const DataLayout &DL,
+                              const TargetLibraryInfo *TLI);
 
   /// Emit a call to the strcpy function to the builder, for the specified
   /// pointer arguments.
-  Value *emitStrCpy(Value *Dst, Value *Src, IRBuilderBase &B,
-                    const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStrCpy(Value *Dst, Value *Src, IRBuilderBase &B,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the stpcpy function to the builder, for the specified
   /// pointer arguments.
-  Value *emitStpCpy(Value *Dst, Value *Src, IRBuilderBase &B,
-                    const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStpCpy(Value *Dst, Value *Src, IRBuilderBase &B,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the strncpy function to the builder, for the specified
   /// pointer arguments and length.
-  Value *emitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B,
-                     const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStrNCpy(Value *Dst, Value *Src, Value *Len,
+                              IRBuilderBase &B, const TargetLibraryInfo *TLI);
 
   /// Emit a call to the stpncpy function to the builder, for the specified
   /// pointer arguments and length.
-  Value *emitStpNCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B,
-                     const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStpNCpy(Value *Dst, Value *Src, Value *Len,
+                              IRBuilderBase &B, const TargetLibraryInfo *TLI);
 
   /// Emit a call to the __memcpy_chk function to the builder. This expects that
   /// the Len and ObjSize have type 'size_t' and Dst/Src are pointers.
-  Value *emitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
-                       IRBuilderBase &B, const DataLayout &DL,
-                       const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitMemCpyChk(Value *Dst, Value *Src, Value *Len,
+                                Value *ObjSize, IRBuilderBase &B,
+                                const DataLayout &DL,
+                                const TargetLibraryInfo *TLI);
 
   /// Emit a call to the mempcpy function.
-  Value *emitMemPCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B,
-                     const DataLayout &DL, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitMemPCpy(Value *Dst, Value *Src, Value *Len,
+                              IRBuilderBase &B, const DataLayout &DL,
+                              const TargetLibraryInfo *TLI);
 
   /// Emit a call to the memchr function. This assumes that Ptr is a pointer,
   /// Val is an 'int' value, and Len is an 'size_t' value.
-  Value *emitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilderBase &B,
-                    const DataLayout &DL, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitMemChr(Value *Ptr, Value *Val, Value *Len,
+                             IRBuilderBase &B, const DataLayout &DL,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the memrchr function, analogously to emitMemChr.
-  Value *emitMemRChr(Value *Ptr, Value *Val, Value *Len, IRBuilderBase &B,
-                    const DataLayout &DL, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitMemRChr(Value *Ptr, Value *Val, Value *Len,
+                              IRBuilderBase &B, const DataLayout &DL,
+                              const TargetLibraryInfo *TLI);
 
   /// Emit a call to the memcmp function.
-  Value *emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B,
-                    const DataLayout &DL, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len,
+                             IRBuilderBase &B, const DataLayout &DL,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the bcmp function.
-  Value *emitBCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B,
-                  const DataLayout &DL, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitBCmp(Value *Ptr1, Value *Ptr2, Value *Len,
+                           IRBuilderBase &B, const DataLayout &DL,
+                           const TargetLibraryInfo *TLI);
 
   /// Emit a call to the memccpy function.
-  Value *emitMemCCpy(Value *Ptr1, Value *Ptr2, Value *Val, Value *Len,
-                     IRBuilderBase &B, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitMemCCpy(Value *Ptr1, Value *Ptr2, Value *Val, Value *Len,
+                              IRBuilderBase &B, const TargetLibraryInfo *TLI);
 
   /// Emit a call to the snprintf function.
-  Value *emitSNPrintf(Value *Dest, Value *Size, Value *Fmt,
-                      ArrayRef<Value *> Args, IRBuilderBase &B,
-                      const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitSNPrintf(Value *Dest, Value *Size, Value *Fmt,
+                               ArrayRef<Value *> Args, IRBuilderBase &B,
+                               const TargetLibraryInfo *TLI);
 
   /// Emit a call to the sprintf function.
-  Value *emitSPrintf(Value *Dest, Value *Fmt, ArrayRef<Value *> VariadicArgs,
-                     IRBuilderBase &B, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitSPrintf(Value *Dest, Value *Fmt,
+                              ArrayRef<Value *> VariadicArgs, IRBuilderBase &B,
+                              const TargetLibraryInfo *TLI);
 
   /// Emit a call to the strcat function.
-  Value *emitStrCat(Value *Dest, Value *Src, IRBuilderBase &B,
-                    const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStrCat(Value *Dest, Value *Src, IRBuilderBase &B,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the strlcpy function.
-  Value *emitStrLCpy(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B,
-                     const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStrLCpy(Value *Dest, Value *Src, Value *Size,
+                              IRBuilderBase &B, const TargetLibraryInfo *TLI);
 
   /// Emit a call to the strlcat function.
-  Value *emitStrLCat(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B,
-                     const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStrLCat(Value *Dest, Value *Src, Value *Size,
+                              IRBuilderBase &B, const TargetLibraryInfo *TLI);
 
   /// Emit a call to the strncat function.
-  Value *emitStrNCat(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B,
-                     const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitStrNCat(Value *Dest, Value *Src, Value *Size,
+                              IRBuilderBase &B, const TargetLibraryInfo *TLI);
 
   /// Emit a call to the vsnprintf function.
-  Value *emitVSNPrintf(Value *Dest, Value *Size, Value *Fmt, Value *VAList,
-                       IRBuilderBase &B, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitVSNPrintf(Value *Dest, Value *Size, Value *Fmt,
+                                Value *VAList, IRBuilderBase &B,
+                                const TargetLibraryInfo *TLI);
 
   /// Emit a call to the vsprintf function.
-  Value *emitVSPrintf(Value *Dest, Value *Fmt, Value *VAList, IRBuilderBase &B,
-                      const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitVSPrintf(Value *Dest, Value *Fmt, Value *VAList,
+                               IRBuilderBase &B, const TargetLibraryInfo *TLI);
 
   /// Emit a call to the unary function named 'Name' (e.g.  'floor'). This
   /// function is known to take a single of type matching 'Op' and returns one
   /// value with the same type. If 'Op' is a long double, 'l' is added as the
   /// suffix of name, if 'Op' is a float, we add a 'f' suffix.
-  Value *emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI,
-                              StringRef Name, IRBuilderBase &B,
-                              const AttributeList &Attrs);
+  LLVM_ABI Value *emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI,
+                                       StringRef Name, IRBuilderBase &B,
+                                       const AttributeList &Attrs);
 
   /// Emit a call to the unary function DoubleFn, FloatFn or LongDoubleFn,
   /// depending of the type of Op.
-  Value *emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI,
-                              LibFunc DoubleFn, LibFunc FloatFn,
-                              LibFunc LongDoubleFn, IRBuilderBase &B,
-                              const AttributeList &Attrs);
+  LLVM_ABI Value *emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI,
+                                       LibFunc DoubleFn, LibFunc FloatFn,
+                                       LibFunc LongDoubleFn, IRBuilderBase &B,
+                                       const AttributeList &Attrs);
 
   /// Emit a call to the binary function named 'Name' (e.g. 'fmin'). This
   /// function is known to take type matching 'Op1' and 'Op2' and return one
   /// value with the same type. If 'Op1/Op2' are long double, 'l' is added as
   /// the suffix of name, if 'Op1/Op2' are float, we add a 'f' suffix.
-  Value *emitBinaryFloatFnCall(Value *Op1, Value *Op2,
-                               const TargetLibraryInfo *TLI,
-                               StringRef Name, IRBuilderBase &B,
-                               const AttributeList &Attrs);
+  LLVM_ABI Value *emitBinaryFloatFnCall(Value *Op1, Value *Op2,
+                                        const TargetLibraryInfo *TLI,
+                                        StringRef Name, IRBuilderBase &B,
+                                        const AttributeList &Attrs);
 
   /// Emit a call to the binary function DoubleFn, FloatFn or LongDoubleFn,
   /// depending of the type of Op1.
-  Value *emitBinaryFloatFnCall(Value *Op1, Value *Op2,
-                               const TargetLibraryInfo *TLI, LibFunc DoubleFn,
-                               LibFunc FloatFn, LibFunc LongDoubleFn,
-                               IRBuilderBase &B, const AttributeList &Attrs);
+  LLVM_ABI Value *emitBinaryFloatFnCall(Value *Op1, Value *Op2,
+                                        const TargetLibraryInfo *TLI,
+                                        LibFunc DoubleFn, LibFunc FloatFn,
+                                        LibFunc LongDoubleFn, IRBuilderBase &B,
+                                        const AttributeList &Attrs);
 
   /// Emit a call to the putchar function. This assumes that Char is an 'int'.
-  Value *emitPutChar(Value *Char, IRBuilderBase &B,
-                     const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitPutChar(Value *Char, IRBuilderBase &B,
+                              const TargetLibraryInfo *TLI);
 
   /// Emit a call to the puts function. This assumes that Str is some pointer.
-  Value *emitPutS(Value *Str, IRBuilderBase &B, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitPutS(Value *Str, IRBuilderBase &B,
+                           const TargetLibraryInfo *TLI);
 
   /// Emit a call to the fputc function. This assumes that Char is an 'int', and
   /// File is a pointer to FILE.
-  Value *emitFPutC(Value *Char, Value *File, IRBuilderBase &B,
-                   const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitFPutC(Value *Char, Value *File, IRBuilderBase &B,
+                            const TargetLibraryInfo *TLI);
 
   /// Emit a call to the fputs function. Str is required to be a pointer and
   /// File is a pointer to FILE.
-  Value *emitFPutS(Value *Str, Value *File, IRBuilderBase &B,
-                   const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitFPutS(Value *Str, Value *File, IRBuilderBase &B,
+                            const TargetLibraryInfo *TLI);
 
   /// Emit a call to the fwrite function. This assumes that Ptr is a pointer,
   /// Size is an 'size_t', and File is a pointer to FILE.
-  Value *emitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilderBase &B,
-                    const DataLayout &DL, const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitFWrite(Value *Ptr, Value *Size, Value *File,
+                             IRBuilderBase &B, const DataLayout &DL,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the malloc function.
-  Value *emitMalloc(Value *Num, IRBuilderBase &B, const DataLayout &DL,
-                    const TargetLibraryInfo *TLI);
+  LLVM_ABI Value *emitMalloc(Value *Num, IRBuilderBase &B, const DataLayout &DL,
+                             const TargetLibraryInfo *TLI);
 
   /// Emit a call to the calloc function.
-  Value *emitCalloc(Value *Num, Value *Size, IRBuilderBase &B,
-                    const TargetLibraryInfo &TLI, unsigned AddrSpace);
+  LLVM_ABI Value *emitCalloc(Value *Num, Value *Size, IRBuilderBase &B,
+                             const TargetLibraryInfo &TLI, unsigned AddrSpace);
 
   /// Emit a call to the hot/cold operator new function.
-  Value *emitHotColdNew(Value *Num, IRBuilderBase &B,
-                        const TargetLibraryInfo *TLI, LibFunc NewFunc,
-                        uint8_t HotCold);
-  Value *emitHotColdNewNoThrow(Value *Num, Value *NoThrow, IRBuilderBase &B,
-                               const TargetLibraryInfo *TLI, LibFunc NewFunc,
-                               uint8_t HotCold);
-  Value *emitHotColdNewAligned(Value *Num, Value *Align, IRBuilderBase &B,
-                               const TargetLibraryInfo *TLI, LibFunc NewFunc,
-                               uint8_t HotCold);
-  Value *emitHotColdNewAlignedNoThrow(Value *Num, Value *Align, Value *NoThrow,
-                                      IRBuilderBase &B,
-                                      const TargetLibraryInfo *TLI,
-                                      LibFunc NewFunc, uint8_t HotCold);
-  Value *emitHotColdSizeReturningNew(Value *Num, IRBuilderBase &B,
+  LLVM_ABI Value *emitHotColdNew(Value *Num, IRBuilderBase &B,
+                                 const TargetLibraryInfo *TLI, LibFunc NewFunc,
+                                 uint8_t HotCold);
+  LLVM_ABI Value *emitHotColdNewNoThrow(Value *Num, Value *NoThrow,
+                                        IRBuilderBase &B,
+                                        const TargetLibraryInfo *TLI,
+                                        LibFunc NewFunc, uint8_t HotCold);
+  LLVM_ABI Value *emitHotColdNewAligned(Value *Num, Value *Align,
+                                        IRBuilderBase &B,
+                                        const TargetLibraryInfo *TLI,
+                                        LibFunc NewFunc, uint8_t HotCold);
+  LLVM_ABI Value *emitHotColdNewAlignedNoThrow(Value *Num, Value *Align,
+                                               Value *NoThrow, IRBuilderBase &B,
+                                               const TargetLibraryInfo *TLI,
+                                               LibFunc NewFunc,
+                                               uint8_t HotCold);
+  LLVM_ABI Value *emitHotColdSizeReturningNew(Value *Num, IRBuilderBase &B,
+                                              const TargetLibraryInfo *TLI,
+                                              LibFunc NewFunc, uint8_t HotCold);
+  LLVM_ABI Value *
+  emitHotColdSizeReturningNewAligned(Value *Num, Value *Align, IRBuilderBase &B,
                                      const TargetLibraryInfo *TLI,
                                      LibFunc NewFunc, uint8_t HotCold);
-  Value *emitHotColdSizeReturningNewAligned(Value *Num, Value *Align,
-                                            IRBuilderBase &B,
-                                            const TargetLibraryInfo *TLI,
-                                            LibFunc NewFunc, uint8_t HotCold);
 }
 
 #endif
diff --git a/llvm/include/llvm/Transforms/Utils/CallGraphUpdater.h b/llvm/include/llvm/Transforms/Utils/CallGraphUpdater.h
index 8dc9648059feb..11122b12d0c6e 100644
--- a/llvm/include/llvm/Transforms/Utils/CallGraphUpdater.h
+++ b/llvm/include/llvm/Transforms/Utils/CallGraphUpdater.h
@@ -17,6 +17,7 @@
 
 #include "llvm/Analysis/CGSCCPassManager.h"
 #include "llvm/Analysis/LazyCallGraph.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -66,25 +67,25 @@ class CallGraphUpdater {
   ///}
 
   /// Finalizer that will trigger actions like function removal from the CG.
-  bool finalize();
+  LLVM_ABI bool finalize();
 
   /// Remove \p Fn from the call graph.
-  void removeFunction(Function &Fn);
+  LLVM_ABI void removeFunction(Function &Fn);
 
   /// After an CGSCC pass changes a function in ways that affect the call
   /// graph, this method can be called to update it.
-  void reanalyzeFunction(Function &Fn);
+  LLVM_ABI void reanalyzeFunction(Function &Fn);
 
   /// If a new function was created by outlining, this method can be called
   /// to update the call graph for the new function. Note that the old one
   /// still needs to be re-analyzed or manually updated.
-  void registerOutlinedFunction(Function &OriginalFn, Function &NewFn);
+  LLVM_ABI void registerOutlinedFunction(Function &OriginalFn, Function &NewFn);
 
   /// Replace \p OldFn in the call graph (and SCC) with \p NewFn. The uses
   /// outside the call graph and the function \p OldFn are not modified.
   /// Note that \p OldFn is also removed from the call graph
   /// (\see removeFunction).
-  void replaceFunctionWith(Function &OldFn, Function &NewFn);
+  LLVM_ABI void replaceFunctionWith(Function &OldFn, Function &NewFn);
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/Transforms/Utils/CallPromotionUtils.h b/llvm/include/llvm/Transforms/Utils/CallPromotionUtils.h
index 58af26f31417b..e9660ac25bc89 100644
--- a/llvm/include/llvm/Transforms/Utils/CallPromotionUtils.h
+++ b/llvm/include/llvm/Transforms/Utils/CallPromotionUtils.h
@@ -15,6 +15,7 @@
 #define LLVM_TRANSFORMS_UTILS_CALLPROMOTIONUTILS_H
 
 #include "llvm/Analysis/CtxProfAnalysis.h"
+#include "llvm/Support/Compiler.h"
 namespace llvm {
 template <typename T> class ArrayRef;
 class Constant;
@@ -32,8 +33,8 @@ class Value;
 /// match exactly, they must at least be bitcast compatible. If \p FailureReason
 /// is non-null and the indirect call cannot be promoted, the failure reason
 /// will be stored in it.
-bool isLegalToPromote(const CallBase &CB, Function *Callee,
-                      const char **FailureReason = nullptr);
+LLVM_ABI bool isLegalToPromote(const CallBase &CB, Function *Callee,
+                               const char **FailureReason = nullptr);
 
 /// Promote the given indirect call site to unconditionally call \p Callee.
 ///
@@ -42,8 +43,8 @@ bool isLegalToPromote(const CallBase &CB, Function *Callee,
 /// of the callee, bitcast instructions are inserted where appropriate. If \p
 /// RetBitCast is non-null, it will be used to store the return value bitcast,
 /// if created.
-CallBase &promoteCall(CallBase &CB, Function *Callee,
-                      CastInst **RetBitCast = nullptr);
+LLVM_ABI CallBase &promoteCall(CallBase &CB, Function *Callee,
+                               CastInst **RetBitCast = nullptr);
 
 /// Promote the given indirect call site to conditionally call \p Callee. The
 /// promoted direct call instruction is predicated on `CB.getCalledOperand() ==
@@ -54,11 +55,11 @@ CallBase &promoteCall(CallBase &CB, Function *Callee,
 /// indirect call site is promoted, placed in the "then" block, and returned. If
 /// \p BranchWeights is non-null, it will be used to set !prof metadata on the
 /// new conditional branch.
-CallBase &promoteCallWithIfThenElse(CallBase &CB, Function *Callee,
-                                    MDNode *BranchWeights = nullptr);
+LLVM_ABI CallBase &promoteCallWithIfThenElse(CallBase &CB, Function *Callee,
+                                             MDNode *BranchWeights = nullptr);
 
-CallBase *promoteCallWithIfThenElse(CallBase &CB, Function &Callee,
-                                    PGOContextualProfile &CtxProf);
+LLVM_ABI CallBase *promoteCallWithIfThenElse(CallBase &CB, Function &Callee,
+                                             PGOContextualProfile &CtxProf);
 
 /// This is similar to `promoteCallWithIfThenElse` except that the condition to
 /// promote a virtual call is that \p VPtr is the same as any of \p
@@ -71,10 +72,10 @@ CallBase *promoteCallWithIfThenElse(CallBase &CB, Function &Callee,
 ///
 /// TODO: sink the address-calculation instructions of indirect callee to the
 /// indirect call fallback after transformation.
-CallBase &promoteCallWithVTableCmp(CallBase &CB, Instruction *VPtr,
-                                   Function *Callee,
-                                   ArrayRef<Constant *> AddressPoints,
-                                   MDNode *BranchWeights);
+LLVM_ABI CallBase &promoteCallWithVTableCmp(CallBase &CB, Instruction *VPtr,
+                                            Function *Callee,
+                                            ArrayRef<Constant *> AddressPoints,
+                                            MDNode *BranchWeights);
 
 /// Try to promote (devirtualize) a virtual call on an Alloca. Return true on
 /// success.
@@ -97,7 +98,7 @@ CallBase &promoteCallWithVTableCmp(CallBase &CB, Instruction *VPtr,
 ///     [i8* null, i8* bitcast ({ i8*, i8*, i8* }* @_ZTI4Impl to i8*),
 ///     i8* bitcast (void (%class.Impl*)* @_ZN4Impl3RunEv to i8*)] }
 ///
-bool tryPromoteCall(CallBase &CB);
+LLVM_ABI bool tryPromoteCall(CallBase &CB);
 
 /// Predicate and clone the given call site.
 ///
@@ -106,7 +107,8 @@ bool tryPromoteCall(CallBase &CB);
 /// the given callee. The original call site is moved into the "else" block,
 /// and a clone of the call site is placed in the "then" block. The cloned
 /// instruction is returned.
-CallBase &versionCallSite(CallBase &CB, Value *Callee, MDNode *BranchWeights);
+LLVM_ABI CallBase &versionCallSite(CallBase &CB, Value *Callee,
+                                   MDNode *BranchWeights);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/Cloning.h b/llvm/include/llvm/Transforms/Utils/Cloning.h
index 58a5faf57a361..6b56230a6e1d4 100644
--- a/llvm/include/llvm/Transforms/Utils/Cloning.h
+++ b/llvm/include/llvm/Transforms/Utils/Cloning.h
@@ -24,6 +24,7 @@
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/DebugLoc.h"
 #include "llvm/IR/ValueHandle.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/ValueMapper.h"
 #include <functional>
 #include <memory>
@@ -49,14 +50,15 @@ class ReturnInst;
 class DomTreeUpdater;
 
 /// Return an exact copy of the specified module
-std::unique_ptr<Module> CloneModule(const Module &M);
-std::unique_ptr<Module> CloneModule(const Module &M, ValueToValueMapTy &VMap);
+LLVM_ABI std::unique_ptr<Module> CloneModule(const Module &M);
+LLVM_ABI std::unique_ptr<Module> CloneModule(const Module &M,
+                                             ValueToValueMapTy &VMap);
 
 /// Return a copy of the specified module. The ShouldCloneDefinition function
 /// controls whether a specific GlobalValue's definition is cloned. If the
 /// function returns false, the module copy will contain an external reference
 /// in place of the global definition.
-std::unique_ptr<Module>
+LLVM_ABI std::unique_ptr<Module>
 CloneModule(const Module &M, ValueToValueMapTy &VMap,
             function_ref<bool(const GlobalValue *)> ShouldCloneDefinition);
 
@@ -127,14 +129,14 @@ struct ClonedCodeInfo {
 /// Setting true (default) is always safe (won't produce incorrect debug info)
 /// but is sometimes unnecessary, causing extra work that could be avoided by
 /// setting the parameter to false.
-BasicBlock *CloneBasicBlock(const BasicBlock *BB, ValueToValueMapTy &VMap,
-                            const Twine &NameSuffix = "", Function *F = nullptr,
-                            ClonedCodeInfo *CodeInfo = nullptr,
-                            bool MapAtoms = true);
+LLVM_ABI BasicBlock *
+CloneBasicBlock(const BasicBlock *BB, ValueToValueMapTy &VMap,
+                const Twine &NameSuffix = "", Function *F = nullptr,
+                ClonedCodeInfo *CodeInfo = nullptr, bool MapAtoms = true);
 
 /// Mark a cloned instruction as a new instance so that its source loc can
 /// be updated when remapped.
-void mapAtomInstance(const DebugLoc &DL, ValueToValueMapTy &VMap);
+LLVM_ABI void mapAtomInstance(const DebugLoc &DL, ValueToValueMapTy &VMap);
 
 /// Return a copy of the specified function and add it to that
 /// function's module.  Also, any references specified in the VMap are changed
@@ -147,8 +149,8 @@ void mapAtomInstance(const DebugLoc &DL, ValueToValueMapTy &VMap);
 ///
 /// \pre VMap contains no non-identity GlobalValue mappings.
 ///
-Function *CloneFunction(Function *F, ValueToValueMapTy &VMap,
-                        ClonedCodeInfo *CodeInfo = nullptr);
+LLVM_ABI Function *CloneFunction(Function *F, ValueToValueMapTy &VMap,
+                                 ClonedCodeInfo *CodeInfo = nullptr);
 
 enum class CloneFunctionChangeType {
   LocalChangesOnly,
@@ -181,21 +183,22 @@ enum class CloneFunctionChangeType {
 /// FIXME: Consider simplifying this function by splitting out \a
 /// CloneFunctionMetadataInto() and expecting / updating callers to call it
 /// first when / how it's needed.
-void CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
-                       ValueToValueMapTy &VMap, CloneFunctionChangeType Changes,
-                       SmallVectorImpl<ReturnInst *> &Returns,
-                       const char *NameSuffix = "",
-                       ClonedCodeInfo *CodeInfo = nullptr,
-                       ValueMapTypeRemapper *TypeMapper = nullptr,
-                       ValueMaterializer *Materializer = nullptr);
+LLVM_ABI void CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
+                                ValueToValueMapTy &VMap,
+                                CloneFunctionChangeType Changes,
+                                SmallVectorImpl<ReturnInst *> &Returns,
+                                const char *NameSuffix = "",
+                                ClonedCodeInfo *CodeInfo = nullptr,
+                                ValueMapTypeRemapper *TypeMapper = nullptr,
+                                ValueMaterializer *Materializer = nullptr);
 
 /// Clone OldFunc's attributes into NewFunc, transforming values based on the
 /// mappings in VMap.
-void CloneFunctionAttributesInto(Function *NewFunc, const Function *OldFunc,
-                                 ValueToValueMapTy &VMap,
-                                 bool ModuleLevelChanges,
-                                 ValueMapTypeRemapper *TypeMapper = nullptr,
-                                 ValueMaterializer *Materializer = nullptr);
+LLVM_ABI void
+CloneFunctionAttributesInto(Function *NewFunc, const Function *OldFunc,
+                            ValueToValueMapTy &VMap, bool ModuleLevelChanges,
+                            ValueMapTypeRemapper *TypeMapper = nullptr,
+                            ValueMaterializer *Materializer = nullptr);
 
 /// Clone OldFunc's metadata into NewFunc.
 ///
@@ -205,28 +208,27 @@ void CloneFunctionAttributesInto(Function *NewFunc, const Function *OldFunc,
 ///
 /// NOTE: This function doesn't clone !llvm.dbg.cu when cloning into a different
 /// module. Use CloneFunctionInto for that behavior.
-void CloneFunctionMetadataInto(Function &NewFunc, const Function &OldFunc,
-                               ValueToValueMapTy &VMap, RemapFlags RemapFlag,
-                               ValueMapTypeRemapper *TypeMapper = nullptr,
-                               ValueMaterializer *Materializer = nullptr,
-                               const MetadataPredicate *IdentityMD = nullptr);
+LLVM_ABI void
+CloneFunctionMetadataInto(Function &NewFunc, const Function &OldFunc,
+                          ValueToValueMapTy &VMap, RemapFlags RemapFlag,
+                          ValueMapTypeRemapper *TypeMapper = nullptr,
+                          ValueMaterializer *Materializer = nullptr,
+                          const MetadataPredicate *IdentityMD = nullptr);
 
 /// Clone OldFunc's body into NewFunc.
-void CloneFunctionBodyInto(Function &NewFunc, const Function &OldFunc,
-                           ValueToValueMapTy &VMap, RemapFlags RemapFlag,
-                           SmallVectorImpl<ReturnInst *> &Returns,
-                           const char *NameSuffix = "",
-                           ClonedCodeInfo *CodeInfo = nullptr,
-                           ValueMapTypeRemapper *TypeMapper = nullptr,
-                           ValueMaterializer *Materializer = nullptr,
-                           const MetadataPredicate *IdentityMD = nullptr);
-
-void CloneAndPruneIntoFromInst(Function *NewFunc, const Function *OldFunc,
-                               const Instruction *StartingInst,
-                               ValueToValueMapTy &VMap, bool ModuleLevelChanges,
-                               SmallVectorImpl<ReturnInst *> &Returns,
-                               const char *NameSuffix = "",
-                               ClonedCodeInfo *CodeInfo = nullptr);
+LLVM_ABI void CloneFunctionBodyInto(
+    Function &NewFunc, const Function &OldFunc, ValueToValueMapTy &VMap,
+    RemapFlags RemapFlag, SmallVectorImpl<ReturnInst *> &Returns,
+    const char *NameSuffix = "", ClonedCodeInfo *CodeInfo = nullptr,
+    ValueMapTypeRemapper *TypeMapper = nullptr,
+    ValueMaterializer *Materializer = nullptr,
+    const MetadataPredicate *IdentityMD = nullptr);
+
+LLVM_ABI void CloneAndPruneIntoFromInst(
+    Function *NewFunc, const Function *OldFunc, const Instruction *StartingInst,
+    ValueToValueMapTy &VMap, bool ModuleLevelChanges,
+    SmallVectorImpl<ReturnInst *> &Returns, const char *NameSuffix = "",
+    ClonedCodeInfo *CodeInfo = nullptr);
 
 /// This works exactly like CloneFunctionInto,
 /// except that it does some simple constant prop and DCE on the fly.  The
@@ -239,11 +241,10 @@ void CloneAndPruneIntoFromInst(Function *NewFunc, const Function *OldFunc,
 /// If ModuleLevelChanges is false, VMap contains no non-identity GlobalValue
 /// mappings.
 ///
-void CloneAndPruneFunctionInto(Function *NewFunc, const Function *OldFunc,
-                               ValueToValueMapTy &VMap, bool ModuleLevelChanges,
-                               SmallVectorImpl<ReturnInst*> &Returns,
-                               const char *NameSuffix = "",
-                               ClonedCodeInfo *CodeInfo = nullptr);
+LLVM_ABI void CloneAndPruneFunctionInto(
+    Function *NewFunc, const Function *OldFunc, ValueToValueMapTy &VMap,
+    bool ModuleLevelChanges, SmallVectorImpl<ReturnInst *> &Returns,
+    const char *NameSuffix = "", ClonedCodeInfo *CodeInfo = nullptr);
 
 /// This class captures the data input to the InlineFunction call, and records
 /// the auxiliary results produced by it.
@@ -311,23 +312,23 @@ class InlineFunctionInfo {
 ///
 /// The callee's function attributes are merged into the callers' if
 /// MergeAttributes is set to true.
-InlineResult InlineFunction(CallBase &CB, InlineFunctionInfo &IFI,
-                            bool MergeAttributes = false,
-                            AAResults *CalleeAAR = nullptr,
-                            bool InsertLifetime = true,
-                            Function *ForwardVarArgsTo = nullptr,
-                            OptimizationRemarkEmitter *ORE = nullptr);
+LLVM_ABI InlineResult InlineFunction(CallBase &CB, InlineFunctionInfo &IFI,
+                                     bool MergeAttributes = false,
+                                     AAResults *CalleeAAR = nullptr,
+                                     bool InsertLifetime = true,
+                                     Function *ForwardVarArgsTo = nullptr,
+                                     OptimizationRemarkEmitter *ORE = nullptr);
 
 /// Same as above, but it will update the contextual profile. If the contextual
 /// profile is invalid (i.e. not loaded because it is not present), it defaults
 /// to the behavior of the non-contextual profile updating variant above. This
 /// makes it easy to drop-in replace uses of the non-contextual overload.
-InlineResult InlineFunction(CallBase &CB, InlineFunctionInfo &IFI,
-                            PGOContextualProfile &CtxProf,
-                            bool MergeAttributes = false,
-                            AAResults *CalleeAAR = nullptr,
-                            bool InsertLifetime = true,
-                            Function *ForwardVarArgsTo = nullptr);
+LLVM_ABI InlineResult InlineFunction(CallBase &CB, InlineFunctionInfo &IFI,
+                                     PGOContextualProfile &CtxProf,
+                                     bool MergeAttributes = false,
+                                     AAResults *CalleeAAR = nullptr,
+                                     bool InsertLifetime = true,
+                                     Function *ForwardVarArgsTo = nullptr);
 
 /// Clones a loop \p OrigLoop.  Returns the loop and the blocks in \p
 /// Blocks.
@@ -335,15 +336,15 @@ InlineResult InlineFunction(CallBase &CB, InlineFunctionInfo &IFI,
 /// Updates LoopInfo and DominatorTree assuming the loop is dominated by block
 /// \p LoopDomBB.  Insert the new blocks before block specified in \p Before.
 /// Note: Only innermost loops are supported.
-Loop *cloneLoopWithPreheader(BasicBlock *Before, BasicBlock *LoopDomBB,
-                             Loop *OrigLoop, ValueToValueMapTy &VMap,
-                             const Twine &NameSuffix, LoopInfo *LI,
-                             DominatorTree *DT,
-                             SmallVectorImpl<BasicBlock *> &Blocks);
+LLVM_ABI Loop *cloneLoopWithPreheader(BasicBlock *Before, BasicBlock *LoopDomBB,
+                                      Loop *OrigLoop, ValueToValueMapTy &VMap,
+                                      const Twine &NameSuffix, LoopInfo *LI,
+                                      DominatorTree *DT,
+                                      SmallVectorImpl<BasicBlock *> &Blocks);
 
 /// Remaps instructions in \p Blocks using the mapping in \p VMap.
-void remapInstructionsInBlocks(ArrayRef<BasicBlock *> Blocks,
-                               ValueToValueMapTy &VMap);
+LLVM_ABI void remapInstructionsInBlocks(ArrayRef<BasicBlock *> Blocks,
+                                        ValueToValueMapTy &VMap);
 
 /// Split edge between BB and PredBB and duplicate all non-Phi instructions
 /// from BB between its beginning and the StopAt instruction into the split
@@ -351,62 +352,62 @@ void remapInstructionsInBlocks(ArrayRef<BasicBlock *> Blocks,
 /// we replace them with the uses of corresponding Phi inputs. ValueMapping
 /// is used to map the original instructions from BB to their newly-created
 /// copies. Returns the split block.
-BasicBlock *DuplicateInstructionsInSplitBetween(BasicBlock *BB,
-                                                BasicBlock *PredBB,
-                                                Instruction *StopAt,
-                                                ValueToValueMapTy &ValueMapping,
-                                                DomTreeUpdater &DTU);
+LLVM_ABI BasicBlock *DuplicateInstructionsInSplitBetween(
+    BasicBlock *BB, BasicBlock *PredBB, Instruction *StopAt,
+    ValueToValueMapTy &ValueMapping, DomTreeUpdater &DTU);
 
 /// Updates profile information by adjusting the entry count by adding
 /// EntryDelta then scaling callsite information by the new count divided by the
 /// old count. VMap is used during inlinng to also update the new clone
-void updateProfileCallee(
+LLVM_ABI void updateProfileCallee(
     Function *Callee, int64_t EntryDelta,
     const ValueMap<const Value *, WeakTrackingVH> *VMap = nullptr);
 
 /// Find the 'llvm.experimental.noalias.scope.decl' intrinsics in the specified
 /// basic blocks and extract their scope. These are candidates for duplication
 /// when cloning.
-void identifyNoAliasScopesToClone(
-    ArrayRef<BasicBlock *> BBs, SmallVectorImpl<MDNode *> &NoAliasDeclScopes);
+LLVM_ABI void
+identifyNoAliasScopesToClone(ArrayRef<BasicBlock *> BBs,
+                             SmallVectorImpl<MDNode *> &NoAliasDeclScopes);
 
 /// Find the 'llvm.experimental.noalias.scope.decl' intrinsics in the specified
 /// instruction range and extract their scope. These are candidates for
 /// duplication when cloning.
-void identifyNoAliasScopesToClone(
-    BasicBlock::iterator Start, BasicBlock::iterator End,
-    SmallVectorImpl<MDNode *> &NoAliasDeclScopes);
+LLVM_ABI void
+identifyNoAliasScopesToClone(BasicBlock::iterator Start,
+                             BasicBlock::iterator End,
+                             SmallVectorImpl<MDNode *> &NoAliasDeclScopes);
 
 /// Duplicate the specified list of noalias decl scopes.
 /// The 'Ext' string is added as an extension to the name.
 /// Afterwards, the ClonedScopes contains the mapping of the original scope
 /// MDNode onto the cloned scope.
 /// Be aware that the cloned scopes are still part of the original scope domain.
-void cloneNoAliasScopes(
-    ArrayRef<MDNode *> NoAliasDeclScopes,
-    DenseMap<MDNode *, MDNode *> &ClonedScopes,
-    StringRef Ext, LLVMContext &Context);
+LLVM_ABI void cloneNoAliasScopes(ArrayRef<MDNode *> NoAliasDeclScopes,
+                                 DenseMap<MDNode *, MDNode *> &ClonedScopes,
+                                 StringRef Ext, LLVMContext &Context);
 
 /// Adapt the metadata for the specified instruction according to the
 /// provided mapping. This is normally used after cloning an instruction, when
 /// some noalias scopes needed to be cloned.
-void adaptNoAliasScopes(
-    llvm::Instruction *I, const DenseMap<MDNode *, MDNode *> &ClonedScopes,
-    LLVMContext &Context);
+LLVM_ABI void
+adaptNoAliasScopes(llvm::Instruction *I,
+                   const DenseMap<MDNode *, MDNode *> &ClonedScopes,
+                   LLVMContext &Context);
 
 /// Clone the specified noalias decl scopes. Then adapt all instructions in the
 /// NewBlocks basicblocks to the cloned versions.
 /// 'Ext' will be added to the duplicate scope names.
-void cloneAndAdaptNoAliasScopes(ArrayRef<MDNode *> NoAliasDeclScopes,
-                                ArrayRef<BasicBlock *> NewBlocks,
-                                LLVMContext &Context, StringRef Ext);
+LLVM_ABI void cloneAndAdaptNoAliasScopes(ArrayRef<MDNode *> NoAliasDeclScopes,
+                                         ArrayRef<BasicBlock *> NewBlocks,
+                                         LLVMContext &Context, StringRef Ext);
 
 /// Clone the specified noalias decl scopes. Then adapt all instructions in the
 /// [IStart, IEnd] (IEnd included !) range to the cloned versions. 'Ext' will be
 /// added to the duplicate scope names.
-void cloneAndAdaptNoAliasScopes(ArrayRef<MDNode *> NoAliasDeclScopes,
-                                Instruction *IStart, Instruction *IEnd,
-                                LLVMContext &Context, StringRef Ext);
+LLVM_ABI void cloneAndAdaptNoAliasScopes(ArrayRef<MDNode *> NoAliasDeclScopes,
+                                         Instruction *IStart, Instruction *IEnd,
+                                         LLVMContext &Context, StringRef Ext);
 } // end namespace llvm
 
 #endif // LLVM_TRANSFORMS_UTILS_CLONING_H
diff --git a/llvm/include/llvm/Transforms/Utils/CodeExtractor.h b/llvm/include/llvm/Transforms/Utils/CodeExtractor.h
index 08c2fe655ac7c..407eb50d2c7a3 100644
--- a/llvm/include/llvm/Transforms/Utils/CodeExtractor.h
+++ b/llvm/include/llvm/Transforms/Utils/CodeExtractor.h
@@ -17,6 +17,7 @@
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SetVector.h"
+#include "llvm/Support/Compiler.h"
 #include <limits>
 
 namespace llvm {
@@ -57,7 +58,7 @@ class CodeExtractorAnalysisCache {
   void findSideEffectInfoForBlock(BasicBlock &BB);
 
 public:
-  CodeExtractorAnalysisCache(Function &F);
+  LLVM_ABI CodeExtractorAnalysisCache(Function &F);
 
   /// Get the allocas in the function at the time the analysis was created.
   /// Note that some of these allocas may no longer be present in the function,
@@ -66,7 +67,8 @@ class CodeExtractorAnalysisCache {
 
   /// Check whether \p BB contains an instruction thought to load from, store
   /// to, or otherwise clobber the alloca \p Addr.
-  bool doesBlockContainClobberOfAddr(BasicBlock &BB, AllocaInst *Addr) const;
+  LLVM_ABI bool doesBlockContainClobberOfAddr(BasicBlock &BB,
+                                              AllocaInst *Addr) const;
 };
 
   /// Utility class for extracting code into a new function.
@@ -148,6 +150,7 @@ class CodeExtractorAnalysisCache {
     /// If ArgsInZeroAddressSpace param is set to true, then the aggregate
     /// param pointer of the outlined function is declared in zero address
     /// space.
+    LLVM_ABI
     CodeExtractor(ArrayRef<BasicBlock *> BBs, DominatorTree *DT = nullptr,
                   bool AggregateArgs = false, BlockFrequencyInfo *BFI = nullptr,
                   BranchProbabilityInfo *BPI = nullptr,
@@ -160,7 +163,8 @@ class CodeExtractorAnalysisCache {
     ///
     /// Returns zero when called on a CodeExtractor instance where isEligible
     /// returns false.
-    Function *extractCodeRegion(const CodeExtractorAnalysisCache &CEAC);
+    LLVM_ABI Function *
+    extractCodeRegion(const CodeExtractorAnalysisCache &CEAC);
 
     /// Perform the extraction, returning the new function and providing an
     /// interface to see what was categorized as inputs and outputs.
@@ -173,15 +177,15 @@ class CodeExtractorAnalysisCache {
     /// newly outlined function.
     /// \returns zero when called on a CodeExtractor instance where isEligible
     /// returns false.
-    Function *extractCodeRegion(const CodeExtractorAnalysisCache &CEAC,
-                                ValueSet &Inputs, ValueSet &Outputs);
+    LLVM_ABI Function *extractCodeRegion(const CodeExtractorAnalysisCache &CEAC,
+                                         ValueSet &Inputs, ValueSet &Outputs);
 
     /// Verify that assumption cache isn't stale after a region is extracted.
     /// Returns true when verifier finds errors. AssumptionCache is passed as
     /// parameter to make this function stateless.
-    static bool verifyAssumptionCache(const Function &OldFunc,
-                                      const Function &NewFunc,
-                                      AssumptionCache *AC);
+    LLVM_ABI static bool verifyAssumptionCache(const Function &OldFunc,
+                                               const Function &NewFunc,
+                                               AssumptionCache *AC);
 
     /// Test whether this code extractor is eligible.
     ///
@@ -190,7 +194,7 @@ class CodeExtractorAnalysisCache {
     ///
     /// Checks that varargs handling (with vastart and vaend) is only done in
     /// the outlined blocks.
-    bool isEligible() const;
+    LLVM_ABI bool isEligible() const;
 
     /// Compute the set of input values and output values for the code.
     ///
@@ -200,15 +204,15 @@ class CodeExtractorAnalysisCache {
     /// a code sequence, that sequence is modified, including changing these
     /// sets, before extraction occurs. These modifications won't have any
     /// significant impact on the cost however.
-    void findInputsOutputs(ValueSet &Inputs, ValueSet &Outputs,
-                           const ValueSet &Allocas,
-                           bool CollectGlobalInputs = false) const;
+    LLVM_ABI void findInputsOutputs(ValueSet &Inputs, ValueSet &Outputs,
+                                    const ValueSet &Allocas,
+                                    bool CollectGlobalInputs = false) const;
 
     /// Check if life time marker nodes can be hoisted/sunk into the outline
     /// region.
     ///
     /// Returns true if it is safe to do the code motion.
-    bool
+    LLVM_ABI bool
     isLegalToShrinkwrapLifetimeMarkers(const CodeExtractorAnalysisCache &CEAC,
                                        Instruction *AllocaAddr) const;
 
@@ -220,9 +224,9 @@ class CodeExtractorAnalysisCache {
     /// are used by the lifetime markers are also candidates for shrink-
     /// wrapping. The instructions that need to be sunk are collected in
     /// 'Allocas'.
-    void findAllocas(const CodeExtractorAnalysisCache &CEAC,
-                     ValueSet &SinkCands, ValueSet &HoistCands,
-                     BasicBlock *&ExitBlock) const;
+    LLVM_ABI void findAllocas(const CodeExtractorAnalysisCache &CEAC,
+                              ValueSet &SinkCands, ValueSet &HoistCands,
+                              BasicBlock *&ExitBlock) const;
 
     /// Find or create a block within the outline region for placing hoisted
     /// code.
@@ -232,11 +236,12 @@ class CodeExtractorAnalysisCache {
     /// inside the region that is the predecessor of CommonExitBlock, that block
     /// will be returned. Otherwise CommonExitBlock will be split and the
     /// original block will be added to the outline region.
-    BasicBlock *findOrCreateBlockForHoisting(BasicBlock *CommonExitBlock);
+    LLVM_ABI BasicBlock *
+    findOrCreateBlockForHoisting(BasicBlock *CommonExitBlock);
 
     /// Exclude a value from aggregate argument passing when extracting a code
     /// region, passing it instead as a scalar.
-    void excludeArgFromAggregate(Value *Arg);
+    LLVM_ABI void excludeArgFromAggregate(Value *Arg);
 
   private:
     struct LifetimeMarkerInfo {
diff --git a/llvm/include/llvm/Transforms/Utils/CodeLayout.h b/llvm/include/llvm/Transforms/Utils/CodeLayout.h
index c737643ee1014..c4b12a5e0e701 100644
--- a/llvm/include/llvm/Transforms/Utils/CodeLayout.h
+++ b/llvm/include/llvm/Transforms/Utils/CodeLayout.h
@@ -15,6 +15,7 @@
 #define LLVM_TRANSFORMS_UTILS_CODELAYOUT_H
 
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/Support/Compiler.h"
 
 #include <utility>
 #include <vector>
@@ -40,20 +41,21 @@ struct EdgeCount {
 /// \p EdgeCounts: The execution counts of every edge (jump) in the profile. The
 ///    map also defines the edges in CFG and should include 0-count edges.
 /// \returns The best block order found.
-std::vector<uint64_t> computeExtTspLayout(ArrayRef<uint64_t> NodeSizes,
-                                          ArrayRef<uint64_t> NodeCounts,
-                                          ArrayRef<EdgeCount> EdgeCounts);
+LLVM_ABI std::vector<uint64_t>
+computeExtTspLayout(ArrayRef<uint64_t> NodeSizes, ArrayRef<uint64_t> NodeCounts,
+                    ArrayRef<EdgeCount> EdgeCounts);
 
 /// Estimate the "quality" of a given node order in CFG. The higher the score,
 /// the better the order is. The score is designed to reflect the locality of
 /// the given order, which is anti-correlated with the number of I-cache misses
 /// in a typical execution of the function.
-double calcExtTspScore(ArrayRef<uint64_t> Order, ArrayRef<uint64_t> NodeSizes,
-                       ArrayRef<EdgeCount> EdgeCounts);
+LLVM_ABI double calcExtTspScore(ArrayRef<uint64_t> Order,
+                                ArrayRef<uint64_t> NodeSizes,
+                                ArrayRef<EdgeCount> EdgeCounts);
 
 /// Estimate the "quality" of the current node order in CFG.
-double calcExtTspScore(ArrayRef<uint64_t> NodeSizes,
-                       ArrayRef<EdgeCount> EdgeCounts);
+LLVM_ABI double calcExtTspScore(ArrayRef<uint64_t> NodeSizes,
+                                ArrayRef<EdgeCount> EdgeCounts);
 
 /// Algorithm-specific params for Cache-Directed Sort. The values are tuned for
 /// the best performance of large-scale front-end bound binaries.
@@ -79,12 +81,12 @@ struct CDSortConfig {
 ///    map also defines the edges in CFG and should include 0-count edges.
 /// \p CallOffsets: The offsets of the calls from their source nodes.
 /// \returns The best function order found.
-std::vector<uint64_t> computeCacheDirectedLayout(
+LLVM_ABI std::vector<uint64_t> computeCacheDirectedLayout(
     ArrayRef<uint64_t> FuncSizes, ArrayRef<uint64_t> FuncCounts,
     ArrayRef<EdgeCount> CallCounts, ArrayRef<uint64_t> CallOffsets);
 
 /// Apply a Cache-Directed Sort with a custom config.
-std::vector<uint64_t> computeCacheDirectedLayout(
+LLVM_ABI std::vector<uint64_t> computeCacheDirectedLayout(
     const CDSortConfig &Config, ArrayRef<uint64_t> FuncSizes,
     ArrayRef<uint64_t> FuncCounts, ArrayRef<EdgeCount> CallCounts,
     ArrayRef<uint64_t> CallOffsets);
diff --git a/llvm/include/llvm/Transforms/Utils/CodeMoverUtils.h b/llvm/include/llvm/Transforms/Utils/CodeMoverUtils.h
index 4fd147a1f7b3b..877872485ab58 100644
--- a/llvm/include/llvm/Transforms/Utils/CodeMoverUtils.h
+++ b/llvm/include/llvm/Transforms/Utils/CodeMoverUtils.h
@@ -17,6 +17,8 @@
 #ifndef LLVM_TRANSFORMS_UTILS_CODEMOVERUTILS_H
 #define LLVM_TRANSFORMS_UTILS_CODEMOVERUTILS_H
 
+#include "llvm/Support/Compiler.h"
+
 namespace llvm {
 
 class BasicBlock;
@@ -28,56 +30,61 @@ class PostDominatorTree;
 /// Return true if \p I0 and \p I1 are control flow equivalent.
 /// Two instructions are control flow equivalent if their basic blocks are
 /// control flow equivalent.
-bool isControlFlowEquivalent(const Instruction &I0, const Instruction &I1,
-                             const DominatorTree &DT,
-                             const PostDominatorTree &PDT);
+LLVM_ABI bool isControlFlowEquivalent(const Instruction &I0,
+                                      const Instruction &I1,
+                                      const DominatorTree &DT,
+                                      const PostDominatorTree &PDT);
 
 /// Return true if \p BB0 and \p BB1 are control flow equivalent.
 /// Two basic blocks are control flow equivalent if when one executes, the other
 /// is guaranteed to execute.
-bool isControlFlowEquivalent(const BasicBlock &BB0, const BasicBlock &BB1,
-                             const DominatorTree &DT,
-                             const PostDominatorTree &PDT);
+LLVM_ABI bool isControlFlowEquivalent(const BasicBlock &BB0,
+                                      const BasicBlock &BB1,
+                                      const DominatorTree &DT,
+                                      const PostDominatorTree &PDT);
 
 /// Return true if \p I can be safely moved before \p InsertPoint.
-bool isSafeToMoveBefore(Instruction &I, Instruction &InsertPoint,
-                        DominatorTree &DT,
-                        const PostDominatorTree *PDT = nullptr,
-                        DependenceInfo *DI = nullptr,
-                        bool CheckForEntireBlock = false);
+LLVM_ABI bool isSafeToMoveBefore(Instruction &I, Instruction &InsertPoint,
+                                 DominatorTree &DT,
+                                 const PostDominatorTree *PDT = nullptr,
+                                 DependenceInfo *DI = nullptr,
+                                 bool CheckForEntireBlock = false);
 
 /// Return true if all instructions (except the terminator) in \p BB can be
 /// safely moved before \p InsertPoint.
-bool isSafeToMoveBefore(BasicBlock &BB, Instruction &InsertPoint,
-                        DominatorTree &DT,
-                        const PostDominatorTree *PDT = nullptr,
-                        DependenceInfo *DI = nullptr);
+LLVM_ABI bool isSafeToMoveBefore(BasicBlock &BB, Instruction &InsertPoint,
+                                 DominatorTree &DT,
+                                 const PostDominatorTree *PDT = nullptr,
+                                 DependenceInfo *DI = nullptr);
 
 /// Move instructions, in an order-preserving manner, from \p FromBB to the
 /// beginning of \p ToBB when proven safe.
-void moveInstructionsToTheBeginning(BasicBlock &FromBB, BasicBlock &ToBB,
-                                    DominatorTree &DT,
-                                    const PostDominatorTree &PDT,
-                                    DependenceInfo &DI);
+LLVM_ABI void moveInstructionsToTheBeginning(BasicBlock &FromBB,
+                                             BasicBlock &ToBB,
+                                             DominatorTree &DT,
+                                             const PostDominatorTree &PDT,
+                                             DependenceInfo &DI);
 
 /// Move instructions, in an order-preserving manner, from \p FromBB to the end
 /// of \p ToBB when proven safe.
-void moveInstructionsToTheEnd(BasicBlock &FromBB, BasicBlock &ToBB,
-                              DominatorTree &DT, const PostDominatorTree &PDT,
-                              DependenceInfo &DI);
+LLVM_ABI void moveInstructionsToTheEnd(BasicBlock &FromBB, BasicBlock &ToBB,
+                                       DominatorTree &DT,
+                                       const PostDominatorTree &PDT,
+                                       DependenceInfo &DI);
 
 /// In case that two BBs \p ThisBlock and \p OtherBlock are control flow
 /// equivalent but they do not strictly dominate and post-dominate each
 /// other, we determine if \p ThisBlock is reached after \p OtherBlock
 /// in the control flow.
-bool nonStrictlyPostDominate(const BasicBlock *ThisBlock,
-                             const BasicBlock *OtherBlock,
-                             const DominatorTree *DT,
-                             const PostDominatorTree *PDT);
+LLVM_ABI bool nonStrictlyPostDominate(const BasicBlock *ThisBlock,
+                                      const BasicBlock *OtherBlock,
+                                      const DominatorTree *DT,
+                                      const PostDominatorTree *PDT);
 
 // Check if I0 is reached before I1 in the control flow.
-bool isReachedBefore(const Instruction *I0, const Instruction *I1,
-                     const DominatorTree *DT, const PostDominatorTree *PDT);
+LLVM_ABI bool isReachedBefore(const Instruction *I0, const Instruction *I1,
+                              const DominatorTree *DT,
+                              const PostDominatorTree *PDT);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/Debugify.h b/llvm/include/llvm/Transforms/Utils/Debugify.h
index 10c8c5897b943..64404efabed1b 100644
--- a/llvm/include/llvm/Transforms/Utils/Debugify.h
+++ b/llvm/include/llvm/Transforms/Utils/Debugify.h
@@ -24,6 +24,7 @@
 #include "llvm/IR/PassManager.h"
 #include "llvm/IR/ValueHandle.h"
 #include "llvm/Pass.h"
+#include "llvm/Support/Compiler.h"
 
 using DebugFnMap =
     llvm::MapVector<const llvm::Function *, const llvm::DISubprogram *>;
@@ -56,14 +57,15 @@ class DIBuilder;
 /// \param ApplyToMF A call back that will add debug information to the
 ///                  MachineFunction for a Function. If nullptr, then the
 ///                  MachineFunction (if any) will not be modified.
-bool applyDebugifyMetadata(
-    Module &M, iterator_range<Module::iterator> Functions, StringRef Banner,
-    std::function<bool(DIBuilder &, Function &)> ApplyToMF);
+LLVM_ABI bool
+applyDebugifyMetadata(Module &M, iterator_range<Module::iterator> Functions,
+                      StringRef Banner,
+                      std::function<bool(DIBuilder &, Function &)> ApplyToMF);
 
 /// Strip out all of the metadata and debug info inserted by debugify. If no
 /// llvm.debugify module-level named metadata is present, this is a no-op.
 /// Returns true if any change was made.
-bool stripDebugifyMetadata(Module &M);
+LLVM_ABI bool stripDebugifyMetadata(Module &M);
 
 /// Collect original debug information before a pass.
 ///
@@ -72,10 +74,10 @@ bool stripDebugifyMetadata(Module &M);
 /// \param DebugInfoBeforePass DI metadata before a pass.
 /// \param Banner A prefix string to add to debug/error messages.
 /// \param NameOfWrappedPass A name of a pass to add to debug/error messages.
-bool collectDebugInfoMetadata(Module &M,
-                              iterator_range<Module::iterator> Functions,
-                              DebugInfoPerPass &DebugInfoBeforePass,
-                              StringRef Banner, StringRef NameOfWrappedPass);
+LLVM_ABI bool
+collectDebugInfoMetadata(Module &M, iterator_range<Module::iterator> Functions,
+                         DebugInfoPerPass &DebugInfoBeforePass,
+                         StringRef Banner, StringRef NameOfWrappedPass);
 
 /// Check original debug information after a pass.
 ///
@@ -84,21 +86,22 @@ bool collectDebugInfoMetadata(Module &M,
 /// \param DebugInfoBeforePass DI metadata before a pass.
 /// \param Banner A prefix string to add to debug/error messages.
 /// \param NameOfWrappedPass A name of a pass to add to debug/error messages.
-bool checkDebugInfoMetadata(Module &M,
-                            iterator_range<Module::iterator> Functions,
-                            DebugInfoPerPass &DebugInfoBeforePass,
-                            StringRef Banner, StringRef NameOfWrappedPass,
-                            StringRef OrigDIVerifyBugsReportFilePath);
+LLVM_ABI bool checkDebugInfoMetadata(Module &M,
+                                     iterator_range<Module::iterator> Functions,
+                                     DebugInfoPerPass &DebugInfoBeforePass,
+                                     StringRef Banner,
+                                     StringRef NameOfWrappedPass,
+                                     StringRef OrigDIVerifyBugsReportFilePath);
 } // namespace llvm
 
 /// Used to check whether we track synthetic or original debug info.
 enum class DebugifyMode { NoDebugify, SyntheticDebugInfo, OriginalDebugInfo };
 
-llvm::ModulePass *createDebugifyModulePass(
+LLVM_ABI llvm::ModulePass *createDebugifyModulePass(
     enum DebugifyMode Mode = DebugifyMode::SyntheticDebugInfo,
     llvm::StringRef NameOfWrappedPass = "",
     DebugInfoPerPass *DebugInfoBeforePass = nullptr);
-llvm::FunctionPass *createDebugifyFunctionPass(
+LLVM_ABI llvm::FunctionPass *createDebugifyFunctionPass(
     enum DebugifyMode Mode = DebugifyMode::SyntheticDebugInfo,
     llvm::StringRef NameOfWrappedPass = "",
     DebugInfoPerPass *DebugInfoBeforePass = nullptr);
@@ -115,7 +118,8 @@ class NewPMDebugifyPass : public llvm::PassInfoMixin<NewPMDebugifyPass> {
       : NameOfWrappedPass(NameOfWrappedPass),
         DebugInfoBeforePass(DebugInfoBeforePass), Mode(Mode) {}
 
-  llvm::PreservedAnalyses run(llvm::Module &M, llvm::ModuleAnalysisManager &AM);
+  LLVM_ABI llvm::PreservedAnalyses run(llvm::Module &M,
+                                       llvm::ModuleAnalysisManager &AM);
 };
 
 /// Track how much `debugify` information (in the `synthetic` mode only)
@@ -147,14 +151,14 @@ struct DebugifyStatistics {
 /// Map pass names to a per-pass DebugifyStatistics instance.
 using DebugifyStatsMap = llvm::MapVector<llvm::StringRef, DebugifyStatistics>;
 
-llvm::ModulePass *createCheckDebugifyModulePass(
+LLVM_ABI llvm::ModulePass *createCheckDebugifyModulePass(
     bool Strip = false, llvm::StringRef NameOfWrappedPass = "",
     DebugifyStatsMap *StatsMap = nullptr,
     enum DebugifyMode Mode = DebugifyMode::SyntheticDebugInfo,
     DebugInfoPerPass *DebugInfoBeforePass = nullptr,
     llvm::StringRef OrigDIVerifyBugsReportFilePath = "");
 
-llvm::FunctionPass *createCheckDebugifyFunctionPass(
+LLVM_ABI llvm::FunctionPass *createCheckDebugifyFunctionPass(
     bool Strip = false, llvm::StringRef NameOfWrappedPass = "",
     DebugifyStatsMap *StatsMap = nullptr,
     enum DebugifyMode Mode = DebugifyMode::SyntheticDebugInfo,
@@ -181,11 +185,12 @@ class NewPMCheckDebugifyPass
         StatsMap(StatsMap), DebugInfoBeforePass(DebugInfoBeforePass), Mode(Mode),
         Strip(Strip) {}
 
-  llvm::PreservedAnalyses run(llvm::Module &M, llvm::ModuleAnalysisManager &AM);
+  LLVM_ABI llvm::PreservedAnalyses run(llvm::Module &M,
+                                       llvm::ModuleAnalysisManager &AM);
 };
 
 namespace llvm {
-void exportDebugifyStats(StringRef Path, const DebugifyStatsMap &Map);
+LLVM_ABI void exportDebugifyStats(StringRef Path, const DebugifyStatsMap &Map);
 
 class DebugifyEachInstrumentation {
   llvm::StringRef OrigDIVerifyBugsReportFilePath = "";
@@ -194,8 +199,8 @@ class DebugifyEachInstrumentation {
   DebugifyStatsMap *DIStatsMap = nullptr;
 
 public:
-  void registerCallbacks(PassInstrumentationCallbacks &PIC,
-                         ModuleAnalysisManager &MAM);
+  LLVM_ABI void registerCallbacks(PassInstrumentationCallbacks &PIC,
+                                  ModuleAnalysisManager &MAM);
   // Used within DebugifyMode::SyntheticDebugInfo mode.
   void setDIStatsMap(DebugifyStatsMap &StatMap) { DIStatsMap = &StatMap; }
   const DebugifyStatsMap &getDebugifyStatsMap() const { return *DIStatsMap; }
diff --git a/llvm/include/llvm/Transforms/Utils/FunctionComparator.h b/llvm/include/llvm/Transforms/Utils/FunctionComparator.h
index 19c5f7449f23e..f3a83c2a04b5f 100644
--- a/llvm/include/llvm/Transforms/Utils/FunctionComparator.h
+++ b/llvm/include/llvm/Transforms/Utils/FunctionComparator.h
@@ -21,6 +21,7 @@
 #include "llvm/IR/ValueMap.h"
 #include "llvm/Support/AtomicOrdering.h"
 #include "llvm/Support/Casting.h"
+#include "llvm/Support/Compiler.h"
 #include <cstdint>
 #include <tuple>
 
@@ -97,7 +98,7 @@ class FunctionComparator {
       : FnL(F1), FnR(F2), GlobalNumbers(GN) {}
 
   /// Test whether the two functions have equivalent behaviour.
-  int compare();
+  LLVM_ABI int compare();
 
 protected:
   /// Start the comparison.
@@ -107,10 +108,11 @@ class FunctionComparator {
   }
 
   /// Compares the signature and other general attributes of the two functions.
-  int compareSignature() const;
+  LLVM_ABI int compareSignature() const;
 
   /// Test whether two basic blocks have equivalent behaviour.
-  int cmpBasicBlocks(const BasicBlock *BBL, const BasicBlock *BBR) const;
+  LLVM_ABI int cmpBasicBlocks(const BasicBlock *BBL,
+                              const BasicBlock *BBR) const;
 
   /// Constants comparison.
   /// Its analog to lexicographical comparison between hypothetical numbers
@@ -214,11 +216,11 @@ class FunctionComparator {
   /// look at their particular properties (bit-width for vectors, and
   /// address space for pointers).
   /// If these properties are equal - compare their contents.
-  int cmpConstants(const Constant *L, const Constant *R) const;
+  LLVM_ABI int cmpConstants(const Constant *L, const Constant *R) const;
 
   /// Compares two global values by number. Uses the GlobalNumbersState to
   /// identify the same gobals across function calls.
-  int cmpGlobalValues(GlobalValue *L, GlobalValue *R) const;
+  LLVM_ABI int cmpGlobalValues(GlobalValue *L, GlobalValue *R) const;
 
   /// Assign or look up previously assigned numbers for the two values, and
   /// return whether the numbers are equal. Numbers are assigned in the order
@@ -238,7 +240,7 @@ class FunctionComparator {
   ///          then left value is greater.
   ///          In another words, we compare serial numbers, for more details
   ///          see comments for sn_mapL and sn_mapR.
-  int cmpValues(const Value *L, const Value *R) const;
+  LLVM_ABI int cmpValues(const Value *L, const Value *R) const;
 
   /// Compare two Instructions for equivalence, similar to
   /// Instruction::isSameOperationAs.
@@ -269,8 +271,8 @@ class FunctionComparator {
   /// Sets \p needToCmpOperands to true if the operands of the instructions
   /// still must be compared afterwards. In this case it's already guaranteed
   /// that both instructions have the same number of operands.
-  int cmpOperations(const Instruction *L, const Instruction *R,
-                    bool &needToCmpOperands) const;
+  LLVM_ABI int cmpOperations(const Instruction *L, const Instruction *R,
+                             bool &needToCmpOperands) const;
 
   /// cmpType - compares two types,
   /// defines total ordering among the types set.
@@ -312,14 +314,15 @@ class FunctionComparator {
   /// be checked with the same way. If we get Res != 0 on some stage, return it.
   /// Otherwise return 0.
   /// 6. For all other cases put llvm_unreachable.
-  int cmpTypes(Type *TyL, Type *TyR) const;
+  LLVM_ABI int cmpTypes(Type *TyL, Type *TyR) const;
 
-  int cmpNumbers(uint64_t L, uint64_t R) const;
-  int cmpAligns(Align L, Align R) const;
-  int cmpAPInts(const APInt &L, const APInt &R) const;
-  int cmpConstantRanges(const ConstantRange &L, const ConstantRange &R) const;
-  int cmpAPFloats(const APFloat &L, const APFloat &R) const;
-  int cmpMem(StringRef L, StringRef R) const;
+  LLVM_ABI int cmpNumbers(uint64_t L, uint64_t R) const;
+  LLVM_ABI int cmpAligns(Align L, Align R) const;
+  LLVM_ABI int cmpAPInts(const APInt &L, const APInt &R) const;
+  LLVM_ABI int cmpConstantRanges(const ConstantRange &L,
+                                 const ConstantRange &R) const;
+  LLVM_ABI int cmpAPFloats(const APFloat &L, const APFloat &R) const;
+  LLVM_ABI int cmpMem(StringRef L, StringRef R) const;
 
   // The two functions undergoing comparison.
   const Function *FnL, *FnR;
@@ -341,7 +344,7 @@ class FunctionComparator {
   /// 3. Pointer operand type (using cmpType method).
   /// 4. Number of operands.
   /// 5. Compare operands, using cmpValues method.
-  int cmpGEPs(const GEPOperator *GEPL, const GEPOperator *GEPR) const;
+  LLVM_ABI int cmpGEPs(const GEPOperator *GEPL, const GEPOperator *GEPR) const;
   int cmpGEPs(const GetElementPtrInst *GEPL,
               const GetElementPtrInst *GEPR) const {
     return cmpGEPs(cast<GEPOperator>(GEPL), cast<GEPOperator>(GEPR));
diff --git a/llvm/include/llvm/Transforms/Utils/FunctionImportUtils.h b/llvm/include/llvm/Transforms/Utils/FunctionImportUtils.h
index 28ba20bc18cf9..c4c7b403bed86 100644
--- a/llvm/include/llvm/Transforms/Utils/FunctionImportUtils.h
+++ b/llvm/include/llvm/Transforms/Utils/FunctionImportUtils.h
@@ -16,6 +16,7 @@
 
 #include "llvm/ADT/SetVector.h"
 #include "llvm/IR/ModuleSummaryIndex.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class Module;
@@ -102,18 +103,19 @@ class FunctionImportGlobalProcessing {
   DenseSet<GlobalValue::GUID> SymbolsToMove;
 
 public:
+  LLVM_ABI
   FunctionImportGlobalProcessing(Module &M, const ModuleSummaryIndex &Index,
                                  SetVector<GlobalValue *> *GlobalsToImport,
                                  bool ClearDSOLocalOnDeclarations);
-  void run();
+  LLVM_ABI void run();
 };
 
 /// Perform in-place global value handling on the given Module for
 /// exported local functions renamed and promoted for ThinLTO.
-void renameModuleForThinLTO(
-    Module &M, const ModuleSummaryIndex &Index,
-    bool ClearDSOLocalOnDeclarations,
-    SetVector<GlobalValue *> *GlobalsToImport = nullptr);
+LLVM_ABI void
+renameModuleForThinLTO(Module &M, const ModuleSummaryIndex &Index,
+                       bool ClearDSOLocalOnDeclarations,
+                       SetVector<GlobalValue *> *GlobalsToImport = nullptr);
 
 } // End llvm namespace
 
diff --git a/llvm/include/llvm/Transforms/Utils/Instrumentation.h b/llvm/include/llvm/Transforms/Utils/Instrumentation.h
index e57083b2dc1b4..962d9e734a40a 100644
--- a/llvm/include/llvm/Transforms/Utils/Instrumentation.h
+++ b/llvm/include/llvm/Transforms/Utils/Instrumentation.h
@@ -19,6 +19,7 @@
 #include "llvm/IR/Function.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/Instruction.h"
+#include "llvm/Support/Compiler.h"
 #include <cassert>
 #include <cstdint>
 #include <limits>
@@ -33,35 +34,35 @@ class CallBase;
 class Module;
 
 /// Check if module has flag attached, if not add the flag.
-bool checkIfAlreadyInstrumented(Module &M, StringRef Flag);
+LLVM_ABI bool checkIfAlreadyInstrumented(Module &M, StringRef Flag);
 
 /// Instrumentation passes often insert conditional checks into entry blocks.
 /// Call this function before splitting the entry block to move instructions
 /// that must remain in the entry block up before the split point. Static
 /// allocas and llvm.localescape calls, for example, must remain in the entry
 /// block.
-BasicBlock::iterator PrepareToSplitEntryBlock(BasicBlock &BB,
-                                              BasicBlock::iterator IP);
+LLVM_ABI BasicBlock::iterator PrepareToSplitEntryBlock(BasicBlock &BB,
+                                                       BasicBlock::iterator IP);
 
 // Create a constant for Str so that we can pass it to the run-time lib.
-GlobalVariable *createPrivateGlobalForString(Module &M, StringRef Str,
-                                             bool AllowMerging,
-                                             Twine NamePrefix = "");
+LLVM_ABI GlobalVariable *createPrivateGlobalForString(Module &M, StringRef Str,
+                                                      bool AllowMerging,
+                                                      Twine NamePrefix = "");
 
 // Returns F.getComdat() if it exists.
 // Otherwise creates a new comdat, sets F's comdat, and returns it.
 // Returns nullptr on failure.
-Comdat *getOrCreateFunctionComdat(Function &F, Triple &T);
+LLVM_ABI Comdat *getOrCreateFunctionComdat(Function &F, Triple &T);
 
 // Place global in a large section for x86-64 ELF binaries to mitigate
 // relocation overflow pressure. This can be be used for metadata globals that
 // aren't directly accessed by code, which has no performance impact.
-void setGlobalVariableLargeSection(const Triple &TargetTriple,
-                                   GlobalVariable &GV);
+LLVM_ABI void setGlobalVariableLargeSection(const Triple &TargetTriple,
+                                            GlobalVariable &GV);
 
 // Insert GCOV profiling instrumentation
 struct GCOVOptions {
-  static GCOVOptions getDefault();
+  LLVM_ABI static GCOVOptions getDefault();
 
   // Specify whether to emit .gcno files.
   bool EmitNotes;
@@ -106,9 +107,10 @@ namespace pgo {
 // If \p AttachProfToDirectCall is true, a prof metadata is attached to the
 // new direct call to contain \p Count.
 // Returns the promoted direct call instruction.
-CallBase &promoteIndirectCall(CallBase &CB, Function *F, uint64_t Count,
-                              uint64_t TotalCount, bool AttachProfToDirectCall,
-                              OptimizationRemarkEmitter *ORE);
+LLVM_ABI CallBase &promoteIndirectCall(CallBase &CB, Function *F,
+                                       uint64_t Count, uint64_t TotalCount,
+                                       bool AttachProfToDirectCall,
+                                       OptimizationRemarkEmitter *ORE);
 } // namespace pgo
 
 /// Options for the frontend instrumentation based profiling pass.
@@ -135,7 +137,7 @@ struct InstrProfOptions {
 };
 
 // Create the variable for profile sampling.
-void createProfileSamplingVar(Module &M);
+LLVM_ABI void createProfileSamplingVar(Module &M);
 
 // Options for sanitizer coverage instrumentation.
 struct SanitizerCoverageOptions {
diff --git a/llvm/include/llvm/Transforms/Utils/IntegerDivision.h b/llvm/include/llvm/Transforms/Utils/IntegerDivision.h
index 35cae9aa2269e..020db95bd1e64 100644
--- a/llvm/include/llvm/Transforms/Utils/IntegerDivision.h
+++ b/llvm/include/llvm/Transforms/Utils/IntegerDivision.h
@@ -16,6 +16,8 @@
 #ifndef LLVM_TRANSFORMS_UTILS_INTEGERDIVISION_H
 #define LLVM_TRANSFORMS_UTILS_INTEGERDIVISION_H
 
+#include "llvm/Support/Compiler.h"
+
 namespace llvm {
   class BinaryOperator;
 }
@@ -29,43 +31,43 @@ namespace llvm {
   /// 32bit and 64bit scalar division.
   ///
   /// Replace Rem with generated code.
-  bool expandRemainder(BinaryOperator *Rem);
+LLVM_ABI bool expandRemainder(BinaryOperator *Rem);
 
-  /// Generate code to divide two integers, replacing Div with the generated
-  /// code. This currently generates code similarly to compiler-rt's
-  /// implementations, but future work includes generating more specialized code
-  /// when more information about the operands are known. Implements both
-  /// 32bit and 64bit scalar division.
-  ///
-  /// Replace Div with generated code.
-  bool expandDivision(BinaryOperator* Div);
+/// Generate code to divide two integers, replacing Div with the generated
+/// code. This currently generates code similarly to compiler-rt's
+/// implementations, but future work includes generating more specialized code
+/// when more information about the operands are known. Implements both
+/// 32bit and 64bit scalar division.
+///
+/// Replace Div with generated code.
+LLVM_ABI bool expandDivision(BinaryOperator *Div);
 
-  /// Generate code to calculate the remainder of two integers, replacing Rem
-  /// with the generated code. Uses ExpandReminder with a 32bit Rem which
-  /// makes it useful for targets with little or no support for less than
-  /// 32 bit arithmetic.
-  ///
-  /// Replace Rem with generated code.
-  bool expandRemainderUpTo32Bits(BinaryOperator *Rem);
+/// Generate code to calculate the remainder of two integers, replacing Rem
+/// with the generated code. Uses ExpandReminder with a 32bit Rem which
+/// makes it useful for targets with little or no support for less than
+/// 32 bit arithmetic.
+///
+/// Replace Rem with generated code.
+LLVM_ABI bool expandRemainderUpTo32Bits(BinaryOperator *Rem);
 
-  /// Generate code to calculate the remainder of two integers, replacing Rem
-  /// with the generated code. Uses ExpandReminder with a 64bit Rem.
-  ///
-  /// Replace Rem with generated code.
-  bool expandRemainderUpTo64Bits(BinaryOperator *Rem);
+/// Generate code to calculate the remainder of two integers, replacing Rem
+/// with the generated code. Uses ExpandReminder with a 64bit Rem.
+///
+/// Replace Rem with generated code.
+LLVM_ABI bool expandRemainderUpTo64Bits(BinaryOperator *Rem);
 
-  /// Generate code to divide two integers, replacing Div with the generated
-  /// code. Uses ExpandDivision with a 32bit Div which makes it useful for
-  /// targets with little or no support for less than 32 bit arithmetic.
-  ///
-  /// Replace Rem with generated code.
-  bool expandDivisionUpTo32Bits(BinaryOperator *Div);
+/// Generate code to divide two integers, replacing Div with the generated
+/// code. Uses ExpandDivision with a 32bit Div which makes it useful for
+/// targets with little or no support for less than 32 bit arithmetic.
+///
+/// Replace Rem with generated code.
+LLVM_ABI bool expandDivisionUpTo32Bits(BinaryOperator *Div);
 
-  /// Generate code to divide two integers, replacing Div with the generated
-  /// code. Uses ExpandDivision with a 64bit Div.
-  ///
-  /// Replace Rem with generated code.
-  bool expandDivisionUpTo64Bits(BinaryOperator *Div);
+/// Generate code to divide two integers, replacing Div with the generated
+/// code. Uses ExpandDivision with a 64bit Div.
+///
+/// Replace Rem with generated code.
+LLVM_ABI bool expandDivisionUpTo64Bits(BinaryOperator *Div);
 
 } // End llvm namespace
 
diff --git a/llvm/include/llvm/Transforms/Utils/LCSSA.h b/llvm/include/llvm/Transforms/Utils/LCSSA.h
index b01c8022a65bc..2ea4b193f33cb 100644
--- a/llvm/include/llvm/Transforms/Utils/LCSSA.h
+++ b/llvm/include/llvm/Transforms/Utils/LCSSA.h
@@ -30,13 +30,14 @@
 #define LLVM_TRANSFORMS_UTILS_LCSSA_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
 /// Converts loops into loop-closed SSA form.
 class LCSSAPass : public PassInfoMixin<LCSSAPass> {
 public:
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/Local.h b/llvm/include/llvm/Transforms/Utils/Local.h
index 6162557496405..55e153f289590 100644
--- a/llvm/include/llvm/Transforms/Utils/Local.h
+++ b/llvm/include/llvm/Transforms/Utils/Local.h
@@ -17,6 +17,7 @@
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/IR/Dominators.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/SimplifyCFGOptions.h"
 #include "llvm/Transforms/Utils/ValueMapper.h"
 #include <cstdint>
@@ -60,9 +61,10 @@ class TargetTransformInfo;
 /// Also calls RecursivelyDeleteTriviallyDeadInstructions() on any branch/switch
 /// conditions and indirectbr addresses this might make dead if
 /// DeleteDeadConditions is true.
-bool ConstantFoldTerminator(BasicBlock *BB, bool DeleteDeadConditions = false,
-                            const TargetLibraryInfo *TLI = nullptr,
-                            DomTreeUpdater *DTU = nullptr);
+LLVM_ABI bool ConstantFoldTerminator(BasicBlock *BB,
+                                     bool DeleteDeadConditions = false,
+                                     const TargetLibraryInfo *TLI = nullptr,
+                                     DomTreeUpdater *DTU = nullptr);
 
 //===----------------------------------------------------------------------===//
 //  Local dead code elimination.
@@ -71,27 +73,29 @@ bool ConstantFoldTerminator(BasicBlock *BB, bool DeleteDeadConditions = false,
 /// Return true if the result produced by the instruction is not used, and the
 /// instruction will return. Certain side-effecting instructions are also
 /// considered dead if there are no uses of the instruction.
-bool isInstructionTriviallyDead(Instruction *I,
-                                const TargetLibraryInfo *TLI = nullptr);
+LLVM_ABI bool
+isInstructionTriviallyDead(Instruction *I,
+                           const TargetLibraryInfo *TLI = nullptr);
 
 /// Return true if the result produced by the instruction would have no side
 /// effects if it was not used. This is equivalent to checking whether
 /// isInstructionTriviallyDead would be true if the use count was 0.
-bool wouldInstructionBeTriviallyDead(const Instruction *I,
-                                     const TargetLibraryInfo *TLI = nullptr);
+LLVM_ABI bool
+wouldInstructionBeTriviallyDead(const Instruction *I,
+                                const TargetLibraryInfo *TLI = nullptr);
 
 /// Return true if the result produced by the instruction has no side effects on
 /// any paths other than where it is used. This is less conservative than
 /// wouldInstructionBeTriviallyDead which is based on the assumption
 /// that the use count will be 0. An example usage of this API is for
 /// identifying instructions that can be sunk down to use(s).
-bool wouldInstructionBeTriviallyDeadOnUnusedPaths(
+LLVM_ABI bool wouldInstructionBeTriviallyDeadOnUnusedPaths(
     Instruction *I, const TargetLibraryInfo *TLI = nullptr);
 
 /// If the specified value is a trivially dead instruction, delete it.
 /// If that makes any of its operands trivially dead, delete them too,
 /// recursively. Return true if any instructions were deleted.
-bool RecursivelyDeleteTriviallyDeadInstructions(
+LLVM_ABI bool RecursivelyDeleteTriviallyDeadInstructions(
     Value *V, const TargetLibraryInfo *TLI = nullptr,
     MemorySSAUpdater *MSSAU = nullptr,
     std::function<void(Value *)> AboutToDeleteCallback =
@@ -105,7 +109,7 @@ bool RecursivelyDeleteTriviallyDeadInstructions(
 ///
 /// `DeadInsts` will be used as scratch storage for this routine and will be
 /// empty afterward.
-void RecursivelyDeleteTriviallyDeadInstructions(
+LLVM_ABI void RecursivelyDeleteTriviallyDeadInstructions(
     SmallVectorImpl<WeakTrackingVH> &DeadInsts,
     const TargetLibraryInfo *TLI = nullptr, MemorySSAUpdater *MSSAU = nullptr,
     std::function<void(Value *)> AboutToDeleteCallback =
@@ -115,7 +119,7 @@ void RecursivelyDeleteTriviallyDeadInstructions(
 /// instructions that are not trivially dead. These will be ignored.
 /// Returns true if any changes were made, i.e. any instructions trivially dead
 /// were found and deleted.
-bool RecursivelyDeleteTriviallyDeadInstructionsPermissive(
+LLVM_ABI bool RecursivelyDeleteTriviallyDeadInstructionsPermissive(
     SmallVectorImpl<WeakTrackingVH> &DeadInsts,
     const TargetLibraryInfo *TLI = nullptr, MemorySSAUpdater *MSSAU = nullptr,
     std::function<void(Value *)> AboutToDeleteCallback =
@@ -126,23 +130,25 @@ bool RecursivelyDeleteTriviallyDeadInstructionsPermissive(
 /// by a trivially dead instruction, delete it. If that makes any of its
 /// operands trivially dead, delete them too, recursively. Return true if a
 /// change was made.
-bool RecursivelyDeleteDeadPHINode(PHINode *PN,
-                                  const TargetLibraryInfo *TLI = nullptr,
-                                  MemorySSAUpdater *MSSAU = nullptr);
+LLVM_ABI bool
+RecursivelyDeleteDeadPHINode(PHINode *PN,
+                             const TargetLibraryInfo *TLI = nullptr,
+                             MemorySSAUpdater *MSSAU = nullptr);
 
 /// Scan the specified basic block and try to simplify any instructions in it
 /// and recursively delete dead instructions.
 ///
 /// This returns true if it changed the code, note that it can delete
 /// instructions in other blocks as well in this block.
-bool SimplifyInstructionsInBlock(BasicBlock *BB,
-                                 const TargetLibraryInfo *TLI = nullptr);
+LLVM_ABI bool
+SimplifyInstructionsInBlock(BasicBlock *BB,
+                            const TargetLibraryInfo *TLI = nullptr);
 
 /// Replace all the uses of an SSA value in @llvm.dbg intrinsics with
 /// undef. This is useful for signaling that a variable, e.g. has been
 /// found dead and hence it's unavailable at a given program point.
 /// Returns true if the dbg values have been changed.
-bool replaceDbgUsesWithUndef(Instruction *I);
+LLVM_ABI bool replaceDbgUsesWithUndef(Instruction *I);
 
 //===----------------------------------------------------------------------===//
 //  Control Flow Graph Restructuring.
@@ -151,29 +157,31 @@ bool replaceDbgUsesWithUndef(Instruction *I);
 /// BB is a block with one predecessor and its predecessor is known to have one
 /// successor (BB!). Eliminate the edge between them, moving the instructions in
 /// the predecessor into BB. This deletes the predecessor block.
-void MergeBasicBlockIntoOnlyPred(BasicBlock *BB, DomTreeUpdater *DTU = nullptr);
+LLVM_ABI void MergeBasicBlockIntoOnlyPred(BasicBlock *BB,
+                                          DomTreeUpdater *DTU = nullptr);
 
 /// BB is known to contain an unconditional branch, and contains no instructions
 /// other than PHI nodes, potential debug intrinsics and the branch. If
 /// possible, eliminate BB by rewriting all the predecessors to branch to the
 /// successor block and return true. If we can't transform, return false.
-bool TryToSimplifyUncondBranchFromEmptyBlock(BasicBlock *BB,
-                                             DomTreeUpdater *DTU = nullptr);
+LLVM_ABI bool
+TryToSimplifyUncondBranchFromEmptyBlock(BasicBlock *BB,
+                                        DomTreeUpdater *DTU = nullptr);
 
 /// Check for and eliminate duplicate PHI nodes in this block. This doesn't try
 /// to be clever about PHI nodes which differ only in the order of the incoming
 /// values, but instcombine orders them so it usually won't matter.
 ///
 /// This overload removes the duplicate PHI nodes directly.
-bool EliminateDuplicatePHINodes(BasicBlock *BB);
+LLVM_ABI bool EliminateDuplicatePHINodes(BasicBlock *BB);
 
 /// Check for and eliminate duplicate PHI nodes in this block. This doesn't try
 /// to be clever about PHI nodes which differ only in the order of the incoming
 /// values, but instcombine orders them so it usually won't matter.
 ///
 /// This overload collects the PHI nodes to be removed into the ToRemove set.
-bool EliminateDuplicatePHINodes(BasicBlock *BB,
-                                SmallPtrSetImpl<PHINode *> &ToRemove);
+LLVM_ABI bool EliminateDuplicatePHINodes(BasicBlock *BB,
+                                         SmallPtrSetImpl<PHINode *> &ToRemove);
 
 /// This function is used to do simplification of a CFG.  For example, it
 /// adjusts branches to branches to eliminate the extra hop, it eliminates
@@ -181,38 +189,40 @@ bool EliminateDuplicatePHINodes(BasicBlock *BB,
 /// It returns true if a modification was made, possibly deleting the basic
 /// block that was pointed to. LoopHeaders is an optional input parameter
 /// providing the set of loop headers that SimplifyCFG should not eliminate.
-extern cl::opt<bool> RequireAndPreserveDomTree;
-bool simplifyCFG(BasicBlock *BB, const TargetTransformInfo &TTI,
-                 DomTreeUpdater *DTU = nullptr,
-                 const SimplifyCFGOptions &Options = {},
-                 ArrayRef<WeakVH> LoopHeaders = {});
+LLVM_ABI extern cl::opt<bool> RequireAndPreserveDomTree;
+LLVM_ABI bool simplifyCFG(BasicBlock *BB, const TargetTransformInfo &TTI,
+                          DomTreeUpdater *DTU = nullptr,
+                          const SimplifyCFGOptions &Options = {},
+                          ArrayRef<WeakVH> LoopHeaders = {});
 
 /// This function is used to flatten a CFG. For example, it uses parallel-and
 /// and parallel-or mode to collapse if-conditions and merge if-regions with
 /// identical statements.
-bool FlattenCFG(BasicBlock *BB, AAResults *AA = nullptr);
+LLVM_ABI bool FlattenCFG(BasicBlock *BB, AAResults *AA = nullptr);
 
 /// If this basic block is ONLY a setcc and a branch, and if a predecessor
 /// branches to us and one of our successors, fold the setcc into the
 /// predecessor and use logical operations to pick the right destination.
-bool foldBranchToCommonDest(BranchInst *BI, llvm::DomTreeUpdater *DTU = nullptr,
-                            MemorySSAUpdater *MSSAU = nullptr,
-                            const TargetTransformInfo *TTI = nullptr,
-                            unsigned BonusInstThreshold = 1);
+LLVM_ABI bool foldBranchToCommonDest(BranchInst *BI,
+                                     llvm::DomTreeUpdater *DTU = nullptr,
+                                     MemorySSAUpdater *MSSAU = nullptr,
+                                     const TargetTransformInfo *TTI = nullptr,
+                                     unsigned BonusInstThreshold = 1);
 
 /// This function takes a virtual register computed by an Instruction and
 /// replaces it with a slot in the stack frame, allocated via alloca.
 /// This allows the CFG to be changed around without fear of invalidating the
 /// SSA information for the value. It returns the pointer to the alloca inserted
 /// to create a stack slot for X.
-AllocaInst *DemoteRegToStack(Instruction &X,
-                             bool VolatileLoads = false,
-                             std::optional<BasicBlock::iterator> AllocaPoint = std::nullopt);
+LLVM_ABI AllocaInst *DemoteRegToStack(
+    Instruction &X, bool VolatileLoads = false,
+    std::optional<BasicBlock::iterator> AllocaPoint = std::nullopt);
 
 /// This function takes a virtual register computed by a phi node and replaces
 /// it with a slot in the stack frame, allocated via alloca. The phi node is
 /// deleted and it returns the pointer to the alloca inserted.
-AllocaInst *DemotePHIToStack(PHINode *P, std::optional<BasicBlock::iterator> AllocaPoint = std::nullopt);
+LLVM_ABI AllocaInst *DemotePHIToStack(
+    PHINode *P, std::optional<BasicBlock::iterator> AllocaPoint = std::nullopt);
 
 /// If the specified pointer points to an object that we control, try to modify
 /// the object's alignment to PrefAlign. Returns a minimum known alignment of
@@ -221,7 +231,8 @@ AllocaInst *DemotePHIToStack(PHINode *P, std::optional<BasicBlock::iterator> All
 /// Increating value alignment isn't often possible though. If alignment is
 /// important, a more reliable approach is to simply align all global variables
 /// and allocation instructions to their preferred alignment from the beginning.
-Align tryEnforceAlignment(Value *V, Align PrefAlign, const DataLayout &DL);
+LLVM_ABI Align tryEnforceAlignment(Value *V, Align PrefAlign,
+                                   const DataLayout &DL);
 
 /// Try to ensure that the alignment of \p V is at least \p PrefAlign bytes. If
 /// the owning object can be modified and has an alignment less than \p
@@ -232,11 +243,11 @@ Align tryEnforceAlignment(Value *V, Align PrefAlign, const DataLayout &DL);
 /// so if alignment is important, a more reliable approach is to simply align
 /// all global variables and allocation instructions to their preferred
 /// alignment from the beginning.
-Align getOrEnforceKnownAlignment(Value *V, MaybeAlign PrefAlign,
-                                 const DataLayout &DL,
-                                 const Instruction *CxtI = nullptr,
-                                 AssumptionCache *AC = nullptr,
-                                 const DominatorTree *DT = nullptr);
+LLVM_ABI Align getOrEnforceKnownAlignment(Value *V, MaybeAlign PrefAlign,
+                                          const DataLayout &DL,
+                                          const Instruction *CxtI = nullptr,
+                                          AssumptionCache *AC = nullptr,
+                                          const DominatorTree *DT = nullptr);
 
 /// Try to infer an alignment for the specified pointer.
 inline Align getKnownAlignment(Value *V, const DataLayout &DL,
@@ -250,10 +261,10 @@ inline Align getKnownAlignment(Value *V, const DataLayout &DL,
 /// attributes, debug information, etc. The call is not placed in a block and it
 /// will not have a name. The invoke instruction is not removed, nor are the
 /// uses replaced by the new call.
-CallInst *createCallMatchingInvoke(InvokeInst *II);
+LLVM_ABI CallInst *createCallMatchingInvoke(InvokeInst *II);
 
 /// This function converts the specified invoke into a normal call.
-CallInst *changeToCall(InvokeInst *II, DomTreeUpdater *DTU = nullptr);
+LLVM_ABI CallInst *changeToCall(InvokeInst *II, DomTreeUpdater *DTU = nullptr);
 
 ///===---------------------------------------------------------------------===//
 ///  Dbg Intrinsic utilities
@@ -261,70 +272,75 @@ CallInst *changeToCall(InvokeInst *II, DomTreeUpdater *DTU = nullptr);
 
 /// Creates and inserts a dbg_value record intrinsic before a store
 /// that has an associated llvm.dbg.value intrinsic.
-void InsertDebugValueAtStoreLoc(DbgVariableRecord *DVR, StoreInst *SI,
-                                DIBuilder &Builder);
+LLVM_ABI void InsertDebugValueAtStoreLoc(DbgVariableRecord *DVR, StoreInst *SI,
+                                         DIBuilder &Builder);
 
 /// Creates and inserts an llvm.dbg.value intrinsic before a store
 /// that has an associated llvm.dbg.value intrinsic.
-void InsertDebugValueAtStoreLoc(DbgVariableIntrinsic *DII, StoreInst *SI,
-                                DIBuilder &Builder);
+LLVM_ABI void InsertDebugValueAtStoreLoc(DbgVariableIntrinsic *DII,
+                                         StoreInst *SI, DIBuilder &Builder);
 
 /// Inserts a llvm.dbg.value intrinsic before a store to an alloca'd value
 /// that has an associated llvm.dbg.declare intrinsic.
-void ConvertDebugDeclareToDebugValue(DbgVariableIntrinsic *DII,
-                                     StoreInst *SI, DIBuilder &Builder);
-void ConvertDebugDeclareToDebugValue(DbgVariableRecord *DVR, StoreInst *SI,
-                                     DIBuilder &Builder);
+LLVM_ABI void ConvertDebugDeclareToDebugValue(DbgVariableIntrinsic *DII,
+                                              StoreInst *SI,
+                                              DIBuilder &Builder);
+LLVM_ABI void ConvertDebugDeclareToDebugValue(DbgVariableRecord *DVR,
+                                              StoreInst *SI,
+                                              DIBuilder &Builder);
 
 /// Inserts a llvm.dbg.value intrinsic before a load of an alloca'd value
 /// that has an associated llvm.dbg.declare intrinsic.
-void ConvertDebugDeclareToDebugValue(DbgVariableIntrinsic *DII,
-                                     LoadInst *LI, DIBuilder &Builder);
-void ConvertDebugDeclareToDebugValue(DbgVariableRecord *DVR, LoadInst *LI,
-                                     DIBuilder &Builder);
+LLVM_ABI void ConvertDebugDeclareToDebugValue(DbgVariableIntrinsic *DII,
+                                              LoadInst *LI, DIBuilder &Builder);
+LLVM_ABI void ConvertDebugDeclareToDebugValue(DbgVariableRecord *DVR,
+                                              LoadInst *LI, DIBuilder &Builder);
 
 /// Inserts a llvm.dbg.value intrinsic after a phi that has an associated
 /// llvm.dbg.declare intrinsic.
-void ConvertDebugDeclareToDebugValue(DbgVariableIntrinsic *DII,
-                                     PHINode *LI, DIBuilder &Builder);
-void ConvertDebugDeclareToDebugValue(DbgVariableRecord *DVR, PHINode *LI,
-                                     DIBuilder &Builder);
+LLVM_ABI void ConvertDebugDeclareToDebugValue(DbgVariableIntrinsic *DII,
+                                              PHINode *LI, DIBuilder &Builder);
+LLVM_ABI void ConvertDebugDeclareToDebugValue(DbgVariableRecord *DVR,
+                                              PHINode *LI, DIBuilder &Builder);
 
 /// Lowers llvm.dbg.declare intrinsics into appropriate set of
 /// llvm.dbg.value intrinsics.
-bool LowerDbgDeclare(Function &F);
+LLVM_ABI bool LowerDbgDeclare(Function &F);
 
 /// Propagate dbg.value intrinsics through the newly inserted PHIs.
-void insertDebugValuesForPHIs(BasicBlock *BB,
-                              SmallVectorImpl<PHINode *> &InsertedPHIs);
+LLVM_ABI void
+insertDebugValuesForPHIs(BasicBlock *BB,
+                         SmallVectorImpl<PHINode *> &InsertedPHIs);
 
 /// Replaces llvm.dbg.declare instruction when the address it
 /// describes is replaced with a new value. If Deref is true, an
 /// additional DW_OP_deref is prepended to the expression. If Offset
 /// is non-zero, a constant displacement is added to the expression
 /// (between the optional Deref operations). Offset can be negative.
-bool replaceDbgDeclare(Value *Address, Value *NewAddress, DIBuilder &Builder,
-                       uint8_t DIExprFlags, int Offset);
+LLVM_ABI bool replaceDbgDeclare(Value *Address, Value *NewAddress,
+                                DIBuilder &Builder, uint8_t DIExprFlags,
+                                int Offset);
 
 /// Replaces multiple llvm.dbg.value instructions when the alloca it describes
 /// is replaced with a new value. If Offset is non-zero, a constant displacement
 /// is added to the expression (after the mandatory Deref). Offset can be
 /// negative. New llvm.dbg.value instructions are inserted at the locations of
 /// the instructions they replace.
-void replaceDbgValueForAlloca(AllocaInst *AI, Value *NewAllocaAddress,
-                              DIBuilder &Builder, int Offset = 0);
+LLVM_ABI void replaceDbgValueForAlloca(AllocaInst *AI, Value *NewAllocaAddress,
+                                       DIBuilder &Builder, int Offset = 0);
 
 /// Assuming the instruction \p I is going to be deleted, attempt to salvage
 /// debug users of \p I by writing the effect of \p I in a DIExpression. If it
 /// cannot be salvaged changes its debug uses to undef.
-void salvageDebugInfo(Instruction &I);
+LLVM_ABI void salvageDebugInfo(Instruction &I);
 
 /// Implementation of salvageDebugInfo, applying only to instructions in
 /// \p Insns, rather than all debug users from findDbgUsers( \p I).
 /// Mark undef if salvaging cannot be completed.
-void salvageDebugInfoForDbgValues(Instruction &I,
-                                  ArrayRef<DbgVariableIntrinsic *> Insns,
-                                  ArrayRef<DbgVariableRecord *> DPInsns);
+LLVM_ABI void
+salvageDebugInfoForDbgValues(Instruction &I,
+                             ArrayRef<DbgVariableIntrinsic *> Insns,
+                             ArrayRef<DbgVariableRecord *> DPInsns);
 
 /// Given an instruction \p I and DIExpression \p DIExpr operating on
 /// it, append the effects of \p I to the DIExpression operand list
@@ -347,9 +363,10 @@ void salvageDebugInfoForDbgValues(Instruction &I,
 ///   Return = %a
 ///   Ops = llvm::dwarf::DW_OP_LLVM_arg0 llvm::dwarf::DW_OP_add
 ///   AdditionalValues = %b
-Value *salvageDebugInfoImpl(Instruction &I, uint64_t CurrentLocOps,
-                            SmallVectorImpl<uint64_t> &Ops,
-                            SmallVectorImpl<Value *> &AdditionalValues);
+LLVM_ABI Value *
+salvageDebugInfoImpl(Instruction &I, uint64_t CurrentLocOps,
+                     SmallVectorImpl<uint64_t> &Ops,
+                     SmallVectorImpl<Value *> &AdditionalValues);
 
 /// Point debug users of \p From to \p To or salvage them. Use this function
 /// only when replacing all uses of \p From with \p To, with a guarantee that
@@ -365,37 +382,39 @@ Value *salvageDebugInfoImpl(Instruction &I, uint64_t CurrentLocOps,
 /// If a debug user cannot be preserved without reordering variable updates or
 /// introducing a use-before-def, it is either salvaged (\ref salvageDebugInfo)
 /// or deleted. Returns true if any debug users were updated.
-bool replaceAllDbgUsesWith(Instruction &From, Value &To, Instruction &DomPoint,
-                           DominatorTree &DT);
+LLVM_ABI bool replaceAllDbgUsesWith(Instruction &From, Value &To,
+                                    Instruction &DomPoint, DominatorTree &DT);
 
 /// If a terminator in an unreachable basic block has an operand of type
 /// Instruction, transform it into poison. Return true if any operands
 /// are changed to poison. Original Values prior to being changed to poison
 /// are returned in \p PoisonedValues.
-bool handleUnreachableTerminator(Instruction *I,
-                                 SmallVectorImpl<Value *> &PoisonedValues);
+LLVM_ABI bool
+handleUnreachableTerminator(Instruction *I,
+                            SmallVectorImpl<Value *> &PoisonedValues);
 
 /// Remove all instructions from a basic block other than its terminator
 /// and any present EH pad instructions. Returns a pair where the first element
 /// is the number of instructions (excluding debug info intrinsics) that have
 /// been removed, and the second element is the number of debug info intrinsics
 /// that have been removed.
-std::pair<unsigned, unsigned>
+LLVM_ABI std::pair<unsigned, unsigned>
 removeAllNonTerminatorAndEHPadInstructions(BasicBlock *BB);
 
 /// Insert an unreachable instruction before the specified
 /// instruction, making it and the rest of the code in the block dead.
-unsigned changeToUnreachable(Instruction *I, bool PreserveLCSSA = false,
-                             DomTreeUpdater *DTU = nullptr,
-                             MemorySSAUpdater *MSSAU = nullptr);
+LLVM_ABI unsigned changeToUnreachable(Instruction *I,
+                                      bool PreserveLCSSA = false,
+                                      DomTreeUpdater *DTU = nullptr,
+                                      MemorySSAUpdater *MSSAU = nullptr);
 
 /// Convert the CallInst to InvokeInst with the specified unwind edge basic
 /// block.  This also splits the basic block where CI is located, because
 /// InvokeInst is a terminator instruction.  Returns the newly split basic
 /// block.
-BasicBlock *changeToInvokeAndSplitBasicBlock(CallInst *CI,
-                                             BasicBlock *UnwindEdge,
-                                             DomTreeUpdater *DTU = nullptr);
+LLVM_ABI BasicBlock *
+changeToInvokeAndSplitBasicBlock(CallInst *CI, BasicBlock *UnwindEdge,
+                                 DomTreeUpdater *DTU = nullptr);
 
 /// Replace 'BB's terminator with one that does not have an unwind successor
 /// block. Rewrites `invoke` to `call`, etc. Updates any PHIs in unwind
@@ -404,13 +423,15 @@ BasicBlock *changeToInvokeAndSplitBasicBlock(CallInst *CI,
 ///
 /// \param BB  Block whose terminator will be replaced.  Its terminator must
 ///            have an unwind successor.
-Instruction *removeUnwindEdge(BasicBlock *BB, DomTreeUpdater *DTU = nullptr);
+LLVM_ABI Instruction *removeUnwindEdge(BasicBlock *BB,
+                                       DomTreeUpdater *DTU = nullptr);
 
 /// Remove all blocks that can not be reached from the function's entry.
 ///
 /// Returns true if any basic block was removed.
-bool removeUnreachableBlocks(Function &F, DomTreeUpdater *DTU = nullptr,
-                             MemorySSAUpdater *MSSAU = nullptr);
+LLVM_ABI bool removeUnreachableBlocks(Function &F,
+                                      DomTreeUpdater *DTU = nullptr,
+                                      MemorySSAUpdater *MSSAU = nullptr);
 
 /// Combine the metadata of two instructions so that K can replace J. This
 /// specifically handles the case of CSE-like transformations. Some
@@ -418,45 +439,47 @@ bool removeUnreachableBlocks(Function &F, DomTreeUpdater *DTU = nullptr,
 /// K cannot be hoisted.
 ///
 /// Unknown metadata is removed.
-void combineMetadataForCSE(Instruction *K, const Instruction *J,
-                           bool DoesKMove);
+LLVM_ABI void combineMetadataForCSE(Instruction *K, const Instruction *J,
+                                    bool DoesKMove);
 
 /// Combine metadata of two instructions, where instruction J is a memory
 /// access that has been merged into K. This will intersect alias-analysis
 /// metadata, while preserving other known metadata.
-void combineAAMetadata(Instruction *K, const Instruction *J);
+LLVM_ABI void combineAAMetadata(Instruction *K, const Instruction *J);
 
 /// Copy the metadata from the source instruction to the destination (the
 /// replacement for the source instruction).
-void copyMetadataForLoad(LoadInst &Dest, const LoadInst &Source);
+LLVM_ABI void copyMetadataForLoad(LoadInst &Dest, const LoadInst &Source);
 
 /// Patch the replacement so that it is not more restrictive than the value
 /// being replaced. It assumes that the replacement does not get moved from
 /// its original position.
-void patchReplacementInstruction(Instruction *I, Value *Repl);
+LLVM_ABI void patchReplacementInstruction(Instruction *I, Value *Repl);
 
 // Replace each use of 'From' with 'To', if that use does not belong to basic
 // block where 'From' is defined. Returns the number of replacements made.
-unsigned replaceNonLocalUsesWith(Instruction *From, Value *To);
+LLVM_ABI unsigned replaceNonLocalUsesWith(Instruction *From, Value *To);
 
 /// Replace each use of 'From' with 'To' if that use is dominated by
 /// the given edge.  Returns the number of replacements made.
-unsigned replaceDominatedUsesWith(Value *From, Value *To, DominatorTree &DT,
-                                  const BasicBlockEdge &Edge);
+LLVM_ABI unsigned replaceDominatedUsesWith(Value *From, Value *To,
+                                           DominatorTree &DT,
+                                           const BasicBlockEdge &Edge);
 /// Replace each use of 'From' with 'To' if that use is dominated by
 /// the end of the given BasicBlock. Returns the number of replacements made.
-unsigned replaceDominatedUsesWith(Value *From, Value *To, DominatorTree &DT,
-                                  const BasicBlock *BB);
+LLVM_ABI unsigned replaceDominatedUsesWith(Value *From, Value *To,
+                                           DominatorTree &DT,
+                                           const BasicBlock *BB);
 /// Replace each use of 'From' with 'To' if that use is dominated by
 /// the given edge and the callback ShouldReplace returns true. Returns the
 /// number of replacements made.
-unsigned replaceDominatedUsesWithIf(
+LLVM_ABI unsigned replaceDominatedUsesWithIf(
     Value *From, Value *To, DominatorTree &DT, const BasicBlockEdge &Edge,
     function_ref<bool(const Use &U, const Value *To)> ShouldReplace);
 /// Replace each use of 'From' with 'To' if that use is dominated by
 /// the end of the given BasicBlock and the callback ShouldReplace returns true.
 /// Returns the number of replacements made.
-unsigned replaceDominatedUsesWithIf(
+LLVM_ABI unsigned replaceDominatedUsesWithIf(
     Value *From, Value *To, DominatorTree &DT, const BasicBlock *BB,
     function_ref<bool(const Use &U, const Value *To)> ShouldReplace);
 
@@ -468,39 +491,41 @@ unsigned replaceDominatedUsesWithIf(
 ///
 /// Most passes can and should ignore this information, and it is only used
 /// during lowering by the GC infrastructure.
-bool callsGCLeafFunction(const CallBase *Call, const TargetLibraryInfo &TLI);
+LLVM_ABI bool callsGCLeafFunction(const CallBase *Call,
+                                  const TargetLibraryInfo &TLI);
 
 /// Copy a nonnull metadata node to a new load instruction.
 ///
 /// This handles mapping it to range metadata if the new load is an integer
 /// load instead of a pointer load.
-void copyNonnullMetadata(const LoadInst &OldLI, MDNode *N, LoadInst &NewLI);
+LLVM_ABI void copyNonnullMetadata(const LoadInst &OldLI, MDNode *N,
+                                  LoadInst &NewLI);
 
 /// Copy a range metadata node to a new load instruction.
 ///
 /// This handles mapping it to nonnull metadata if the new load is a pointer
 /// load instead of an integer load and the range doesn't cover null.
-void copyRangeMetadata(const DataLayout &DL, const LoadInst &OldLI, MDNode *N,
-                       LoadInst &NewLI);
+LLVM_ABI void copyRangeMetadata(const DataLayout &DL, const LoadInst &OldLI,
+                                MDNode *N, LoadInst &NewLI);
 
 /// Remove the debug intrinsic instructions for the given instruction.
-void dropDebugUsers(Instruction &I);
+LLVM_ABI void dropDebugUsers(Instruction &I);
 
 /// Hoist all of the instructions in the \p IfBlock to the dominant block
 /// \p DomBlock, by moving its instructions to the insertion point \p InsertPt.
 ///
 /// The moved instructions receive the insertion point debug location values
 /// (DILocations) and their debug intrinsic instructions are removed.
-void hoistAllInstructionsInto(BasicBlock *DomBlock, Instruction *InsertPt,
-                              BasicBlock *BB);
+LLVM_ABI void hoistAllInstructionsInto(BasicBlock *DomBlock,
+                                       Instruction *InsertPt, BasicBlock *BB);
 
 /// Given a constant, create a debug information expression.
-DIExpression *getExpressionForConstant(DIBuilder &DIB, const Constant &C,
-                                       Type &Ty);
+LLVM_ABI DIExpression *getExpressionForConstant(DIBuilder &DIB,
+                                                const Constant &C, Type &Ty);
 
 /// Remap the operands of the debug records attached to \p Inst, and the
 /// operands of \p Inst itself if it's a debug intrinsic.
-void remapDebugVariable(ValueToValueMapTy &Mapping, Instruction *Inst);
+LLVM_ABI void remapDebugVariable(ValueToValueMapTy &Mapping, Instruction *Inst);
 
 //===----------------------------------------------------------------------===//
 //  Intrinsic pattern matching
@@ -517,9 +542,10 @@ void remapDebugVariable(ValueToValueMapTy &Mapping, Instruction *Inst);
 /// to BW / 4 nodes to be searched, so is significantly faster.
 ///
 /// This function returns true on a successful match or false otherwise.
-bool recognizeBSwapOrBitReverseIdiom(
-    Instruction *I, bool MatchBSwaps, bool MatchBitReversals,
-    SmallVectorImpl<Instruction *> &InsertedInsts);
+LLVM_ABI bool
+recognizeBSwapOrBitReverseIdiom(Instruction *I, bool MatchBSwaps,
+                                bool MatchBitReversals,
+                                SmallVectorImpl<Instruction *> &InsertedInsts);
 
 //===----------------------------------------------------------------------===//
 //  Sanitizer utilities
@@ -529,8 +555,9 @@ bool recognizeBSwapOrBitReverseIdiom(
 /// and mark it with NoBuiltin if so.  To be used by sanitizers that intend
 /// to intercept string functions and want to avoid converting them to target
 /// specific instructions.
-void maybeMarkSanitizerLibraryCallNoBuiltin(CallInst *CI,
-                                            const TargetLibraryInfo *TLI);
+LLVM_ABI void
+maybeMarkSanitizerLibraryCallNoBuiltin(CallInst *CI,
+                                       const TargetLibraryInfo *TLI);
 
 //===----------------------------------------------------------------------===//
 //  Transform predicates
@@ -538,15 +565,15 @@ void maybeMarkSanitizerLibraryCallNoBuiltin(CallInst *CI,
 
 /// Given an instruction, is it legal to set operand OpIdx to a non-constant
 /// value?
-bool canReplaceOperandWithVariable(const Instruction *I, unsigned OpIdx);
+LLVM_ABI bool canReplaceOperandWithVariable(const Instruction *I,
+                                            unsigned OpIdx);
 
 //===----------------------------------------------------------------------===//
 //  Value helper functions
 //
 
 /// Invert the given true/false value, possibly reusing an existing copy.
-Value *invertCondition(Value *Condition);
-
+LLVM_ABI Value *invertCondition(Value *Condition);
 
 //===----------------------------------------------------------------------===//
 //  Assorted
@@ -554,7 +581,7 @@ Value *invertCondition(Value *Condition);
 
 /// If we can infer one attribute from another on the declaration of a
 /// function, explicitly materialize the maximal set in the IR.
-bool inferAttributesFromOthers(Function &F);
+LLVM_ABI bool inferAttributesFromOthers(Function &F);
 
 //===----------------------------------------------------------------------===//
 //  Helpers to track and update flags on instructions.
@@ -581,10 +608,10 @@ struct OverflowTracking {
   OverflowTracking() = default;
 
   /// Merge in the no-wrap flags from \p I.
-  void mergeFlags(Instruction &I);
+  LLVM_ABI void mergeFlags(Instruction &I);
 
   /// Apply the no-wrap flags to \p I if applicable.
-  void applyFlags(Instruction &I);
+  LLVM_ABI void applyFlags(Instruction &I);
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/Transforms/Utils/LoopRotationUtils.h b/llvm/include/llvm/Transforms/Utils/LoopRotationUtils.h
index 61bf93b74a15a..c3643e0f27f94 100644
--- a/llvm/include/llvm/Transforms/Utils/LoopRotationUtils.h
+++ b/llvm/include/llvm/Transforms/Utils/LoopRotationUtils.h
@@ -13,6 +13,8 @@
 #ifndef LLVM_TRANSFORMS_UTILS_LOOPROTATIONUTILS_H
 #define LLVM_TRANSFORMS_UTILS_LOOPROTATIONUTILS_H
 
+#include "llvm/Support/Compiler.h"
+
 namespace llvm {
 
 class AssumptionCache;
@@ -30,11 +32,12 @@ class TargetTransformInfo;
 /// header. If the loop header's size exceeds the threshold, the loop rotation
 /// will give up. The flag IsUtilMode controls the heuristic used in the
 /// LoopRotation. If it is true, the profitability heuristic will be ignored.
-bool LoopRotation(Loop *L, LoopInfo *LI, const TargetTransformInfo *TTI,
-                  AssumptionCache *AC, DominatorTree *DT, ScalarEvolution *SE,
-                  MemorySSAUpdater *MSSAU, const SimplifyQuery &SQ,
-                  bool RotationOnly, unsigned Threshold, bool IsUtilMode,
-                  bool PrepareForLTO = false);
+LLVM_ABI bool LoopRotation(Loop *L, LoopInfo *LI,
+                           const TargetTransformInfo *TTI, AssumptionCache *AC,
+                           DominatorTree *DT, ScalarEvolution *SE,
+                           MemorySSAUpdater *MSSAU, const SimplifyQuery &SQ,
+                           bool RotationOnly, unsigned Threshold,
+                           bool IsUtilMode, bool PrepareForLTO = false);
 
 } // namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/LoopSimplify.h b/llvm/include/llvm/Transforms/Utils/LoopSimplify.h
index d017fd12026d6..8f3fa1f2b18ef 100644
--- a/llvm/include/llvm/Transforms/Utils/LoopSimplify.h
+++ b/llvm/include/llvm/Transforms/Utils/LoopSimplify.h
@@ -39,6 +39,7 @@
 #define LLVM_TRANSFORMS_UTILS_LOOPSIMPLIFY_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -52,7 +53,7 @@ class ScalarEvolution;
 /// This pass is responsible for loop canonicalization.
 class LoopSimplifyPass : public PassInfoMixin<LoopSimplifyPass> {
 public:
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 /// Simplify each loop in a loop nest recursively.
@@ -61,9 +62,9 @@ class LoopSimplifyPass : public PassInfoMixin<LoopSimplifyPass> {
 /// it into a simplified loop nest with preheaders and single backedges. It will
 /// update \c DominatorTree, \c LoopInfo, \c ScalarEvolution and \c MemorySSA
 /// analyses if they're non-null, and LCSSA if \c PreserveLCSSA is true.
-bool simplifyLoop(Loop *L, DominatorTree *DT, LoopInfo *LI, ScalarEvolution *SE,
-                  AssumptionCache *AC, MemorySSAUpdater *MSSAU,
-                  bool PreserveLCSSA);
+LLVM_ABI bool simplifyLoop(Loop *L, DominatorTree *DT, LoopInfo *LI,
+                           ScalarEvolution *SE, AssumptionCache *AC,
+                           MemorySSAUpdater *MSSAU, bool PreserveLCSSA);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/LoopUtils.h b/llvm/include/llvm/Transforms/Utils/LoopUtils.h
index 3ad1113ecacf7..e4bfd7659313b 100644
--- a/llvm/include/llvm/Transforms/Utils/LoopUtils.h
+++ b/llvm/include/llvm/Transforms/Utils/LoopUtils.h
@@ -17,6 +17,7 @@
 #include "llvm/Analysis/LoopAccessAnalysis.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/IR/VectorBuilder.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/ValueMapper.h"
 
 namespace llvm {
@@ -52,16 +53,19 @@ typedef std::pair<const RuntimeCheckingPtrGroup *,
 template <typename T, unsigned N> class SmallSetVector;
 template <typename T, unsigned N> class SmallPriorityWorklist;
 
-BasicBlock *InsertPreheaderForLoop(Loop *L, DominatorTree *DT, LoopInfo *LI,
-                                   MemorySSAUpdater *MSSAU, bool PreserveLCSSA);
+LLVM_ABI BasicBlock *InsertPreheaderForLoop(Loop *L, DominatorTree *DT,
+                                            LoopInfo *LI,
+                                            MemorySSAUpdater *MSSAU,
+                                            bool PreserveLCSSA);
 
 /// Ensure that all exit blocks of the loop are dedicated exits.
 ///
 /// For any loop exit block with non-loop predecessors, we split the loop
 /// predecessors to use a dedicated loop exit block. We update the dominator
 /// tree and loop info if provided, and will preserve LCSSA if requested.
-bool formDedicatedExitBlocks(Loop *L, DominatorTree *DT, LoopInfo *LI,
-                             MemorySSAUpdater *MSSAU, bool PreserveLCSSA);
+LLVM_ABI bool formDedicatedExitBlocks(Loop *L, DominatorTree *DT, LoopInfo *LI,
+                                      MemorySSAUpdater *MSSAU,
+                                      bool PreserveLCSSA);
 
 /// Ensures LCSSA form for every instruction from the Worklist in the scope of
 /// innermost containing loop.
@@ -81,11 +85,12 @@ bool formDedicatedExitBlocks(Loop *L, DominatorTree *DT, LoopInfo *LI,
 ///
 /// If \p InsertedPHIs is not nullptr, inserted phis will be added to this
 /// vector.
-bool formLCSSAForInstructions(
-    SmallVectorImpl<Instruction *> &Worklist, const DominatorTree &DT,
-    const LoopInfo &LI, ScalarEvolution *SE,
-    SmallVectorImpl<PHINode *> *PHIsToRemove = nullptr,
-    SmallVectorImpl<PHINode *> *InsertedPHIs = nullptr);
+LLVM_ABI bool
+formLCSSAForInstructions(SmallVectorImpl<Instruction *> &Worklist,
+                         const DominatorTree &DT, const LoopInfo &LI,
+                         ScalarEvolution *SE,
+                         SmallVectorImpl<PHINode *> *PHIsToRemove = nullptr,
+                         SmallVectorImpl<PHINode *> *InsertedPHIs = nullptr);
 
 /// Put loop into LCSSA form.
 ///
@@ -99,8 +104,8 @@ bool formLCSSAForInstructions(
 /// If ScalarEvolution is passed in, it will be preserved.
 ///
 /// Returns true if any modifications are made to the loop.
-bool formLCSSA(Loop &L, const DominatorTree &DT, const LoopInfo *LI,
-               ScalarEvolution *SE);
+LLVM_ABI bool formLCSSA(Loop &L, const DominatorTree &DT, const LoopInfo *LI,
+                        ScalarEvolution *SE);
 
 /// Put a loop nest into LCSSA form.
 ///
@@ -111,8 +116,8 @@ bool formLCSSA(Loop &L, const DominatorTree &DT, const LoopInfo *LI,
 /// If ScalarEvolution is passed in, it will be preserved.
 ///
 /// Returns true if any modifications are made to the loop.
-bool formLCSSARecursively(Loop &L, const DominatorTree &DT, const LoopInfo *LI,
-                          ScalarEvolution *SE);
+LLVM_ABI bool formLCSSARecursively(Loop &L, const DominatorTree &DT,
+                                   const LoopInfo *LI, ScalarEvolution *SE);
 
 /// Flags controlling how much is checked when sinking or hoisting
 /// instructions.  The number of memory access in the loop (and whether there
@@ -120,11 +125,11 @@ bool formLCSSARecursively(Loop &L, const DominatorTree &DT, const LoopInfo *LI,
 class SinkAndHoistLICMFlags {
 public:
   // Explicitly set limits.
-  SinkAndHoistLICMFlags(unsigned LicmMssaOptCap,
-                        unsigned LicmMssaNoAccForPromotionCap, bool IsSink,
-                        Loop &L, MemorySSA &MSSA);
+  LLVM_ABI SinkAndHoistLICMFlags(unsigned LicmMssaOptCap,
+                                 unsigned LicmMssaNoAccForPromotionCap,
+                                 bool IsSink, Loop &L, MemorySSA &MSSA);
   // Use default limits.
-  SinkAndHoistLICMFlags(bool IsSink, Loop &L, MemorySSA &MSSA);
+  LLVM_ABI SinkAndHoistLICMFlags(bool IsSink, Loop &L, MemorySSA &MSSA);
 
   void setIsSink(bool B) { IsSink = B; }
   bool getIsSink() { return IsSink; }
@@ -150,19 +155,21 @@ class SinkAndHoistLICMFlags {
 /// arguments. Diagnostics is emitted via \p ORE. It returns changed status.
 /// \p CurLoop is a loop to do sinking on. \p OutermostLoop is used only when
 /// this function is called by \p sinkRegionForLoopNest.
-bool sinkRegion(DomTreeNode *, AAResults *, LoopInfo *, DominatorTree *,
-                TargetLibraryInfo *, TargetTransformInfo *, Loop *CurLoop,
-                MemorySSAUpdater &, ICFLoopSafetyInfo *,
-                SinkAndHoistLICMFlags &, OptimizationRemarkEmitter *,
-                Loop *OutermostLoop = nullptr);
+LLVM_ABI bool sinkRegion(DomTreeNode *, AAResults *, LoopInfo *,
+                         DominatorTree *, TargetLibraryInfo *,
+                         TargetTransformInfo *, Loop *CurLoop,
+                         MemorySSAUpdater &, ICFLoopSafetyInfo *,
+                         SinkAndHoistLICMFlags &, OptimizationRemarkEmitter *,
+                         Loop *OutermostLoop = nullptr);
 
 /// Call sinkRegion on loops contained within the specified loop
 /// in order from innermost to outermost.
-bool sinkRegionForLoopNest(DomTreeNode *, AAResults *, LoopInfo *,
-                           DominatorTree *, TargetLibraryInfo *,
-                           TargetTransformInfo *, Loop *, MemorySSAUpdater &,
-                           ICFLoopSafetyInfo *, SinkAndHoistLICMFlags &,
-                           OptimizationRemarkEmitter *);
+LLVM_ABI bool sinkRegionForLoopNest(DomTreeNode *, AAResults *, LoopInfo *,
+                                    DominatorTree *, TargetLibraryInfo *,
+                                    TargetTransformInfo *, Loop *,
+                                    MemorySSAUpdater &, ICFLoopSafetyInfo *,
+                                    SinkAndHoistLICMFlags &,
+                                    OptimizationRemarkEmitter *);
 
 /// Walk the specified region of the CFG (defined by all blocks
 /// dominated by the specified block, and that are in the current loop) in depth
@@ -174,16 +181,17 @@ bool sinkRegionForLoopNest(DomTreeNode *, AAResults *, LoopInfo *,
 /// Diagnostics is emitted via \p ORE. It returns changed status.
 /// \p AllowSpeculation is whether values should be hoisted even if they are not
 /// guaranteed to execute in the loop, but are safe to speculatively execute.
-bool hoistRegion(DomTreeNode *, AAResults *, LoopInfo *, DominatorTree *,
-                 AssumptionCache *, TargetLibraryInfo *, Loop *,
-                 MemorySSAUpdater &, ScalarEvolution *, ICFLoopSafetyInfo *,
-                 SinkAndHoistLICMFlags &, OptimizationRemarkEmitter *, bool,
-                 bool AllowSpeculation);
+LLVM_ABI bool hoistRegion(DomTreeNode *, AAResults *, LoopInfo *,
+                          DominatorTree *, AssumptionCache *,
+                          TargetLibraryInfo *, Loop *, MemorySSAUpdater &,
+                          ScalarEvolution *, ICFLoopSafetyInfo *,
+                          SinkAndHoistLICMFlags &, OptimizationRemarkEmitter *,
+                          bool, bool AllowSpeculation);
 
 /// Return true if the induction variable \p IV in a Loop whose latch is
 /// \p LatchBlock would become dead if the exit test \p Cond were removed.
 /// Conservatively returns false if analysis is insufficient.
-bool isAlmostDeadIV(PHINode *IV, BasicBlock *LatchBlock, Value *Cond);
+LLVM_ABI bool isAlmostDeadIV(PHINode *IV, BasicBlock *LatchBlock, Value *Cond);
 
 /// This function deletes dead loops. The caller of this function needs to
 /// guarantee that the loop is infact dead.
@@ -196,14 +204,14 @@ bool isAlmostDeadIV(PHINode *IV, BasicBlock *LatchBlock, Value *Cond);
 /// and \p MSSA if pointers to those are provided.
 /// It also updates the loop PM if an updater struct is provided.
 
-void deleteDeadLoop(Loop *L, DominatorTree *DT, ScalarEvolution *SE,
-                    LoopInfo *LI, MemorySSA *MSSA = nullptr);
+LLVM_ABI void deleteDeadLoop(Loop *L, DominatorTree *DT, ScalarEvolution *SE,
+                             LoopInfo *LI, MemorySSA *MSSA = nullptr);
 
 /// Remove the backedge of the specified loop.  Handles loop nests and general
 /// loop structures subject to the precondition that the loop has no parent
 /// loop and has a single latch block.  Preserves all listed analyses.
-void breakLoopBackedge(Loop *L, DominatorTree &DT, ScalarEvolution &SE,
-                       LoopInfo &LI, MemorySSA *MSSA);
+LLVM_ABI void breakLoopBackedge(Loop *L, DominatorTree &DT, ScalarEvolution &SE,
+                                LoopInfo &LI, MemorySSA *MSSA);
 
 /// Try to promote memory values to scalars by sinking stores out of
 /// the loop and moving loads to before the loop.  We do this by looping over
@@ -215,7 +223,7 @@ void breakLoopBackedge(Loop *L, DominatorTree &DT, ScalarEvolution &SE,
 /// Diagnostics is emitted via \p ORE. It returns changed status.
 /// \p AllowSpeculation is whether values should be hoisted even if they are not
 /// guaranteed to execute in the loop, but are safe to speculatively execute.
-bool promoteLoopAccessesToScalars(
+LLVM_ABI bool promoteLoopAccessesToScalars(
     const SmallSetVector<Value *, 8> &, SmallVectorImpl<BasicBlock *> &,
     SmallVectorImpl<BasicBlock::iterator> &, SmallVectorImpl<MemoryAccess *> &,
     PredIteratorCache &, LoopInfo *, DominatorTree *, AssumptionCache *AC,
@@ -225,17 +233,17 @@ bool promoteLoopAccessesToScalars(
 
 /// Does a BFS from a given node to all of its children inside a given loop.
 /// The returned vector of basic blocks includes the starting point.
-SmallVector<BasicBlock *, 16>
+LLVM_ABI SmallVector<BasicBlock *, 16>
 collectChildrenInLoop(DominatorTree *DT, DomTreeNode *N, const Loop *CurLoop);
 
 /// Returns the instructions that use values defined in the loop.
-SmallVector<Instruction *, 8> findDefsUsedOutsideOfLoop(Loop *L);
+LLVM_ABI SmallVector<Instruction *, 8> findDefsUsedOutsideOfLoop(Loop *L);
 
 /// Find a combination of metadata ("llvm.loop.vectorize.width" and
 /// "llvm.loop.vectorize.scalable.enable") for a loop and use it to construct a
 /// ElementCount. If the metadata "llvm.loop.vectorize.width" cannot be found
 /// then std::nullopt is returned.
-std::optional<ElementCount>
+LLVM_ABI std::optional<ElementCount>
 getOptionalElementCountLoopAttribute(const Loop *TheLoop);
 
 /// Create a new loop identifier for a loop created from a loop transformation.
@@ -262,16 +270,16 @@ getOptionalElementCountLoopAttribute(const Loop *TheLoop);
 ///         @p OrigLoopID: The original identifier can be reused.
 ///         nullptr      : The new loop has no attributes.
 ///         MDNode*      : A new unique loop identifier.
-std::optional<MDNode *>
+LLVM_ABI std::optional<MDNode *>
 makeFollowupLoopID(MDNode *OrigLoopID, ArrayRef<StringRef> FollowupAttrs,
                    const char *InheritOptionsAttrsPrefix = "",
                    bool AlwaysNew = false);
 
 /// Look for the loop attribute that disables all transformation heuristic.
-bool hasDisableAllTransformsHint(const Loop *L);
+LLVM_ABI bool hasDisableAllTransformsHint(const Loop *L);
 
 /// Look for the loop attribute that disables the LICM transformation heuristics.
-bool hasDisableLICMTransformsHint(const Loop *L);
+LLVM_ABI bool hasDisableLICMTransformsHint(const Loop *L);
 
 /// The mode sets how eager a transformation should be applied.
 enum TransformationMode {
@@ -302,25 +310,25 @@ enum TransformationMode {
 
 /// @{
 /// Get the mode for LLVM's supported loop transformations.
-TransformationMode hasUnrollTransformation(const Loop *L);
-TransformationMode hasUnrollAndJamTransformation(const Loop *L);
-TransformationMode hasVectorizeTransformation(const Loop *L);
-TransformationMode hasDistributeTransformation(const Loop *L);
-TransformationMode hasLICMVersioningTransformation(const Loop *L);
+LLVM_ABI TransformationMode hasUnrollTransformation(const Loop *L);
+LLVM_ABI TransformationMode hasUnrollAndJamTransformation(const Loop *L);
+LLVM_ABI TransformationMode hasVectorizeTransformation(const Loop *L);
+LLVM_ABI TransformationMode hasDistributeTransformation(const Loop *L);
+LLVM_ABI TransformationMode hasLICMVersioningTransformation(const Loop *L);
 /// @}
 
 /// Set input string into loop metadata by keeping other values intact.
 /// If the string is already in loop metadata update value if it is
 /// different.
-void addStringMetadataToLoop(Loop *TheLoop, const char *MDString,
-                             unsigned V = 0);
+LLVM_ABI void addStringMetadataToLoop(Loop *TheLoop, const char *MDString,
+                                      unsigned V = 0);
 
 /// Returns a loop's estimated trip count based on branch weight metadata.
 /// In addition if \p EstimatedLoopInvocationWeight is not null it is
 /// initialized with weight of loop's latch leading to the exit.
 /// Returns a valid positive trip count, saturated at UINT_MAX, or std::nullopt
 /// when a meaningful estimate cannot be made.
-std::optional<unsigned>
+LLVM_ABI std::optional<unsigned>
 getLoopEstimatedTripCount(Loop *L,
                           unsigned *EstimatedLoopInvocationWeight = nullptr);
 
@@ -329,20 +337,20 @@ getLoopEstimatedTripCount(Loop *L,
 /// through latch. Returns true if metadata is successfully updated, false
 /// otherwise. Note that loop must have a latch block which controls loop exit
 /// in order to succeed.
-bool setLoopEstimatedTripCount(Loop *L, unsigned EstimatedTripCount,
-                               unsigned EstimatedLoopInvocationWeight);
+LLVM_ABI bool setLoopEstimatedTripCount(Loop *L, unsigned EstimatedTripCount,
+                                        unsigned EstimatedLoopInvocationWeight);
 
 /// Check inner loop (L) backedge count is known to be invariant on all
 /// iterations of its outer loop. If the loop has no parent, this is trivially
 /// true.
-bool hasIterationCountInvariantInParent(Loop *L, ScalarEvolution &SE);
+LLVM_ABI bool hasIterationCountInvariantInParent(Loop *L, ScalarEvolution &SE);
 
 /// Helper to consistently add the set of standard passes to a loop pass's \c
 /// AnalysisUsage.
 ///
 /// All loop passes should call this as part of implementing their \c
 /// getAnalysisUsage.
-void getLoopAnalysisUsage(AnalysisUsage &AU);
+LLVM_ABI void getLoopAnalysisUsage(AnalysisUsage &AU);
 
 /// Returns true if is legal to hoist or sink this instruction disregarding the
 /// possible introduction of faults.  Reasoning about potential faulting
@@ -353,84 +361,89 @@ void getLoopAnalysisUsage(AnalysisUsage &AU);
 /// to assess the legality of duplicating atomic loads.  Generally, this is
 /// true when moving out of loop and not true when moving into loops.
 /// If \p ORE is set use it to emit optimization remarks.
-bool canSinkOrHoistInst(Instruction &I, AAResults *AA, DominatorTree *DT,
-                        Loop *CurLoop, MemorySSAUpdater &MSSAU,
-                        bool TargetExecutesOncePerLoop,
-                        SinkAndHoistLICMFlags &LICMFlags,
-                        OptimizationRemarkEmitter *ORE = nullptr);
+LLVM_ABI bool canSinkOrHoistInst(Instruction &I, AAResults *AA,
+                                 DominatorTree *DT, Loop *CurLoop,
+                                 MemorySSAUpdater &MSSAU,
+                                 bool TargetExecutesOncePerLoop,
+                                 SinkAndHoistLICMFlags &LICMFlags,
+                                 OptimizationRemarkEmitter *ORE = nullptr);
 
 /// Returns the llvm.vector.reduce intrinsic that corresponds to the recurrence
 /// kind.
-constexpr Intrinsic::ID getReductionIntrinsicID(RecurKind RK);
+LLVM_ABI constexpr Intrinsic::ID getReductionIntrinsicID(RecurKind RK);
 
 /// Returns the arithmetic instruction opcode used when expanding a reduction.
-unsigned getArithmeticReductionInstruction(Intrinsic::ID RdxID);
+LLVM_ABI unsigned getArithmeticReductionInstruction(Intrinsic::ID RdxID);
 /// Returns the reduction intrinsic id corresponding to the binary operation.
-Intrinsic::ID getReductionForBinop(Instruction::BinaryOps Opc);
+LLVM_ABI Intrinsic::ID getReductionForBinop(Instruction::BinaryOps Opc);
 
 /// Returns the min/max intrinsic used when expanding a min/max reduction.
-Intrinsic::ID getMinMaxReductionIntrinsicOp(Intrinsic::ID RdxID);
+LLVM_ABI Intrinsic::ID getMinMaxReductionIntrinsicOp(Intrinsic::ID RdxID);
 
 /// Returns the min/max intrinsic used when expanding a min/max reduction.
-Intrinsic::ID getMinMaxReductionIntrinsicOp(RecurKind RK);
+LLVM_ABI Intrinsic::ID getMinMaxReductionIntrinsicOp(RecurKind RK);
 
 /// Returns the recurence kind used when expanding a min/max reduction.
-RecurKind getMinMaxReductionRecurKind(Intrinsic::ID RdxID);
+LLVM_ABI RecurKind getMinMaxReductionRecurKind(Intrinsic::ID RdxID);
 
 /// Returns the comparison predicate used when expanding a min/max reduction.
-CmpInst::Predicate getMinMaxReductionPredicate(RecurKind RK);
+LLVM_ABI CmpInst::Predicate getMinMaxReductionPredicate(RecurKind RK);
 
 /// Given information about an @llvm.vector.reduce.* intrinsic, return
 /// the identity value for the reduction.
-Value *getReductionIdentity(Intrinsic::ID RdxID, Type *Ty, FastMathFlags FMF);
+LLVM_ABI Value *getReductionIdentity(Intrinsic::ID RdxID, Type *Ty,
+                                     FastMathFlags FMF);
 
 /// Given information about an recurrence kind, return the identity
 /// for the @llvm.vector.reduce.* used to generate it.
-Value *getRecurrenceIdentity(RecurKind K, Type *Tp, FastMathFlags FMF);
+LLVM_ABI Value *getRecurrenceIdentity(RecurKind K, Type *Tp, FastMathFlags FMF);
 
 /// Returns a Min/Max operation corresponding to MinMaxRecurrenceKind.
 /// The Builder's fast-math-flags must be set to propagate the expected values.
-Value *createMinMaxOp(IRBuilderBase &Builder, RecurKind RK, Value *Left,
-                      Value *Right);
+LLVM_ABI Value *createMinMaxOp(IRBuilderBase &Builder, RecurKind RK,
+                               Value *Left, Value *Right);
 
 /// Generates an ordered vector reduction using extracts to reduce the value.
-Value *getOrderedReduction(IRBuilderBase &Builder, Value *Acc, Value *Src,
-                           unsigned Op, RecurKind MinMaxKind = RecurKind::None);
+LLVM_ABI Value *getOrderedReduction(IRBuilderBase &Builder, Value *Acc,
+                                    Value *Src, unsigned Op,
+                                    RecurKind MinMaxKind = RecurKind::None);
 
 /// Generates a vector reduction using shufflevectors to reduce the value.
 /// Fast-math-flags are propagated using the IRBuilder's setting.
-Value *getShuffleReduction(IRBuilderBase &Builder, Value *Src, unsigned Op,
-                           TargetTransformInfo::ReductionShuffle RS,
-                           RecurKind MinMaxKind = RecurKind::None);
+LLVM_ABI Value *getShuffleReduction(IRBuilderBase &Builder, Value *Src,
+                                    unsigned Op,
+                                    TargetTransformInfo::ReductionShuffle RS,
+                                    RecurKind MinMaxKind = RecurKind::None);
 
 /// Create a reduction of the given vector. The reduction operation
 /// is described by the \p Opcode parameter. min/max reductions require
 /// additional information supplied in \p RdxKind.
 /// Fast-math-flags are propagated using the IRBuilder's setting.
-Value *createSimpleReduction(IRBuilderBase &B, Value *Src,
-                             RecurKind RdxKind);
+LLVM_ABI Value *createSimpleReduction(IRBuilderBase &B, Value *Src,
+                                      RecurKind RdxKind);
 /// Overloaded function to generate vector-predication intrinsics for
 /// reduction.
-Value *createSimpleReduction(VectorBuilder &VB, Value *Src, RecurKind RdxKind);
+LLVM_ABI Value *createSimpleReduction(VectorBuilder &VB, Value *Src,
+                                      RecurKind RdxKind);
 
 /// Create a reduction of the given vector \p Src for a reduction of kind
 /// RecurKind::AnyOf. The start value of the reduction is \p InitVal.
-Value *createAnyOfReduction(IRBuilderBase &B, Value *Src, Value *InitVal,
-                            PHINode *OrigPhi);
+LLVM_ABI Value *createAnyOfReduction(IRBuilderBase &B, Value *Src,
+                                     Value *InitVal, PHINode *OrigPhi);
 
 /// Create a reduction of the given vector \p Src for a reduction of the
 /// kind RecurKind::FindLastIV.
-Value *createFindLastIVReduction(IRBuilderBase &B, Value *Src, Value *Start,
-                                 Value *Sentinel);
+LLVM_ABI Value *createFindLastIVReduction(IRBuilderBase &B, Value *Src,
+                                          Value *Start, Value *Sentinel);
 
 /// Create an ordered reduction intrinsic using the given recurrence
 /// kind \p RdxKind.
-Value *createOrderedReduction(IRBuilderBase &B, RecurKind RdxKind, Value *Src,
-                              Value *Start);
+LLVM_ABI Value *createOrderedReduction(IRBuilderBase &B, RecurKind RdxKind,
+                                       Value *Src, Value *Start);
 /// Overloaded function to generate vector-predication intrinsics for ordered
 /// reduction.
-Value *createOrderedReduction(VectorBuilder &VB, RecurKind RdxKind, Value *Src,
-                              Value *Start);
+LLVM_ABI Value *createOrderedReduction(VectorBuilder &VB, RecurKind RdxKind,
+                                       Value *Src, Value *Start);
 
 /// Get the intersection (logical and) of all of the potential IR flags
 /// of each scalar operation (VL) that will be converted into a vector (I).
@@ -438,33 +451,36 @@ Value *createOrderedReduction(VectorBuilder &VB, RecurKind RdxKind, Value *Src,
 /// when intersecting.
 /// Flag set: NSW, NUW (if IncludeWrapFlags is true), exact, and all of
 /// fast-math.
-void propagateIRFlags(Value *I, ArrayRef<Value *> VL, Value *OpValue = nullptr,
-                      bool IncludeWrapFlags = true);
+LLVM_ABI void propagateIRFlags(Value *I, ArrayRef<Value *> VL,
+                               Value *OpValue = nullptr,
+                               bool IncludeWrapFlags = true);
 
 /// Returns true if we can prove that \p S is defined and always negative in
 /// loop \p L.
-bool isKnownNegativeInLoop(const SCEV *S, const Loop *L, ScalarEvolution &SE);
+LLVM_ABI bool isKnownNegativeInLoop(const SCEV *S, const Loop *L,
+                                    ScalarEvolution &SE);
 
 /// Returns true if we can prove that \p S is defined and always non-negative in
 /// loop \p L.
-bool isKnownNonNegativeInLoop(const SCEV *S, const Loop *L,
-                              ScalarEvolution &SE);
+LLVM_ABI bool isKnownNonNegativeInLoop(const SCEV *S, const Loop *L,
+                                       ScalarEvolution &SE);
 /// Returns true if we can prove that \p S is defined and always positive in
 /// loop \p L.
-bool isKnownPositiveInLoop(const SCEV *S, const Loop *L, ScalarEvolution &SE);
+LLVM_ABI bool isKnownPositiveInLoop(const SCEV *S, const Loop *L,
+                                    ScalarEvolution &SE);
 
 /// Returns true if we can prove that \p S is defined and always non-positive in
 /// loop \p L.
-bool isKnownNonPositiveInLoop(const SCEV *S, const Loop *L,
-                              ScalarEvolution &SE);
+LLVM_ABI bool isKnownNonPositiveInLoop(const SCEV *S, const Loop *L,
+                                       ScalarEvolution &SE);
 
 /// Returns true if \p S is defined and never is equal to signed/unsigned max.
-bool cannotBeMaxInLoop(const SCEV *S, const Loop *L, ScalarEvolution &SE,
-                       bool Signed);
+LLVM_ABI bool cannotBeMaxInLoop(const SCEV *S, const Loop *L,
+                                ScalarEvolution &SE, bool Signed);
 
 /// Returns true if \p S is defined and never is equal to signed/unsigned min.
-bool cannotBeMinInLoop(const SCEV *S, const Loop *L, ScalarEvolution &SE,
-                       bool Signed);
+LLVM_ABI bool cannotBeMinInLoop(const SCEV *S, const Loop *L,
+                                ScalarEvolution &SE, bool Signed);
 
 enum ReplaceExitVal {
   NeverRepl,
@@ -479,11 +495,12 @@ enum ReplaceExitVal {
 /// outside of the loop that use the final values of the current expressions.
 /// Return the number of loop exit values that have been replaced, and the
 /// corresponding phi node will be added to DeadInsts.
-int rewriteLoopExitValues(Loop *L, LoopInfo *LI, TargetLibraryInfo *TLI,
-                          ScalarEvolution *SE, const TargetTransformInfo *TTI,
-                          SCEVExpander &Rewriter, DominatorTree *DT,
-                          ReplaceExitVal ReplaceExitValue,
-                          SmallVector<WeakTrackingVH, 16> &DeadInsts);
+LLVM_ABI int rewriteLoopExitValues(Loop *L, LoopInfo *LI,
+                                   TargetLibraryInfo *TLI, ScalarEvolution *SE,
+                                   const TargetTransformInfo *TTI,
+                                   SCEVExpander &Rewriter, DominatorTree *DT,
+                                   ReplaceExitVal ReplaceExitValue,
+                                   SmallVector<WeakTrackingVH, 16> &DeadInsts);
 
 /// Set weights for \p UnrolledLoop and \p RemainderLoop based on weights for
 /// \p OrigLoop and the following distribution of \p OrigLoop iteration among \p
@@ -499,8 +516,8 @@ int rewriteLoopExitValues(Loop *L, LoopInfo *LI, TargetLibraryInfo *TLI,
 ///
 /// This utility may be useful for such optimizations as unroller and
 /// vectorizer as it's typical transformation for them.
-void setProfileInfoAfterUnrolling(Loop *OrigLoop, Loop *UnrolledLoop,
-                                  Loop *RemainderLoop, uint64_t UF);
+LLVM_ABI void setProfileInfoAfterUnrolling(Loop *OrigLoop, Loop *UnrolledLoop,
+                                           Loop *RemainderLoop, uint64_t UF);
 
 /// Utility that implements appending of loops onto a worklist given a range.
 /// We want to process loops in postorder, but the worklist is a LIFO data
@@ -508,7 +525,8 @@ void setProfileInfoAfterUnrolling(Loop *OrigLoop, Loop *UnrolledLoop,
 /// For trees, a preorder traversal is a viable reverse postorder, so we
 /// actually append using a preorder walk algorithm.
 template <typename RangeT>
-void appendLoopsToWorklist(RangeT &&, SmallPriorityWorklist<Loop *, 4> &);
+LLVM_TEMPLATE_ABI void
+appendLoopsToWorklist(RangeT &&, SmallPriorityWorklist<Loop *, 4> &);
 /// Utility that implements appending of loops onto a worklist given a range.
 /// It has the same behavior as appendLoopsToWorklist, but assumes the range of
 /// loops has already been reversed, so it processes loops in the given order.
@@ -516,6 +534,14 @@ template <typename RangeT>
 void appendReversedLoopsToWorklist(RangeT &&,
                                    SmallPriorityWorklist<Loop *, 4> &);
 
+extern template LLVM_TEMPLATE_ABI void
+llvm::appendLoopsToWorklist<ArrayRef<Loop *> &>(
+    ArrayRef<Loop *> &Loops, SmallPriorityWorklist<Loop *, 4> &Worklist);
+
+extern template LLVM_TEMPLATE_ABI void
+llvm::appendLoopsToWorklist<Loop &>(Loop &L,
+                                    SmallPriorityWorklist<Loop *, 4> &Worklist);
+
 /// Utility that implements appending of loops onto a worklist given LoopInfo.
 /// Calls the templated utility taking a Range of loops, handing it the Loops
 /// in LoopInfo, iterated in reverse. This is because the loops are stored in
@@ -525,21 +551,22 @@ void appendReversedLoopsToWorklist(RangeT &&,
 /// loop nest into the next. Calls appendReversedLoopsToWorklist with the
 /// already reversed loops in LI.
 /// FIXME: Consider changing the order in LoopInfo.
-void appendLoopsToWorklist(LoopInfo &, SmallPriorityWorklist<Loop *, 4> &);
+LLVM_ABI void appendLoopsToWorklist(LoopInfo &,
+                                    SmallPriorityWorklist<Loop *, 4> &);
 
 /// Recursively clone the specified loop and all of its children,
 /// mapping the blocks with the specified map.
-Loop *cloneLoop(Loop *L, Loop *PL, ValueToValueMapTy &VM,
-                LoopInfo *LI, LPPassManager *LPM);
+LLVM_ABI Loop *cloneLoop(Loop *L, Loop *PL, ValueToValueMapTy &VM, LoopInfo *LI,
+                         LPPassManager *LPM);
 
 /// Add code that checks at runtime if the accessed arrays in \p PointerChecks
 /// overlap. Returns the final comparator value or NULL if no check is needed.
-Value *
+LLVM_ABI Value *
 addRuntimeChecks(Instruction *Loc, Loop *TheLoop,
                  const SmallVectorImpl<RuntimePointerCheck> &PointerChecks,
                  SCEVExpander &Expander, bool HoistRuntimeChecks = false);
 
-Value *addDiffRuntimeChecks(
+LLVM_ABI Value *addDiffRuntimeChecks(
     Instruction *Loc, ArrayRef<PointerDiffInfo> Checks, SCEVExpander &Expander,
     function_ref<Value *(IRBuilderBase &, unsigned)> GetVF, unsigned IC);
 
@@ -572,10 +599,9 @@ struct IVConditionInfo {
 /// If the branch condition of the header is partially invariant, return a pair
 /// containing the instructions to duplicate and a boolean Constant to update
 /// the condition in the loops created for the true or false successors.
-std::optional<IVConditionInfo> hasPartialIVCondition(const Loop &L,
-                                                     unsigned MSSAThreshold,
-                                                     const MemorySSA &MSSA,
-                                                     AAResults &AA);
+LLVM_ABI std::optional<IVConditionInfo>
+hasPartialIVCondition(const Loop &L, unsigned MSSAThreshold,
+                      const MemorySSA &MSSA, AAResults &AA);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/LowerMemIntrinsics.h b/llvm/include/llvm/Transforms/Utils/LowerMemIntrinsics.h
index 6a2c44a5ceb62..fe2625cb993ab 100644
--- a/llvm/include/llvm/Transforms/Utils/LowerMemIntrinsics.h
+++ b/llvm/include/llvm/Transforms/Utils/LowerMemIntrinsics.h
@@ -14,6 +14,7 @@
 #ifndef LLVM_TRANSFORMS_UTILS_LOWERMEMINTRINSICS_H
 #define LLVM_TRANSFORMS_UTILS_LOWERMEMINTRINSICS_H
 
+#include "llvm/Support/Compiler.h"
 #include <cstdint>
 #include <optional>
 
@@ -33,7 +34,7 @@ struct Align;
 
 /// Emit a loop implementing the semantics of llvm.memcpy where the size is not
 /// a compile-time constant. Loop will be insterted at \p InsertBefore.
-void createMemCpyLoopUnknownSize(
+LLVM_ABI void createMemCpyLoopUnknownSize(
     Instruction *InsertBefore, Value *SrcAddr, Value *DstAddr, Value *CopyLen,
     Align SrcAlign, Align DestAlign, bool SrcIsVolatile, bool DstIsVolatile,
     bool CanOverlap, const TargetTransformInfo &TTI,
@@ -41,30 +42,32 @@ void createMemCpyLoopUnknownSize(
 
 /// Emit a loop implementing the semantics of an llvm.memcpy whose size is a
 /// compile time constant. Loop is inserted at \p InsertBefore.
-void createMemCpyLoopKnownSize(
+LLVM_ABI void createMemCpyLoopKnownSize(
     Instruction *InsertBefore, Value *SrcAddr, Value *DstAddr,
     ConstantInt *CopyLen, Align SrcAlign, Align DestAlign, bool SrcIsVolatile,
     bool DstIsVolatile, bool CanOverlap, const TargetTransformInfo &TTI,
     std::optional<uint32_t> AtomicCpySize = std::nullopt);
 
 /// Expand \p MemCpy as a loop. \p MemCpy is not deleted.
-void expandMemCpyAsLoop(MemCpyInst *MemCpy, const TargetTransformInfo &TTI,
-                        ScalarEvolution *SE = nullptr);
+LLVM_ABI void expandMemCpyAsLoop(MemCpyInst *MemCpy,
+                                 const TargetTransformInfo &TTI,
+                                 ScalarEvolution *SE = nullptr);
 
 /// Expand \p MemMove as a loop. \p MemMove is not deleted. Returns true if the
 /// memmove was lowered.
-bool expandMemMoveAsLoop(MemMoveInst *MemMove, const TargetTransformInfo &TTI);
+LLVM_ABI bool expandMemMoveAsLoop(MemMoveInst *MemMove,
+                                  const TargetTransformInfo &TTI);
 
 /// Expand \p MemSet as a loop. \p MemSet is not deleted.
-void expandMemSetAsLoop(MemSetInst *MemSet);
+LLVM_ABI void expandMemSetAsLoop(MemSetInst *MemSet);
 
 /// Expand \p MemSetPattern as a loop. \p MemSet is not deleted.
-void expandMemSetPatternAsLoop(MemSetPatternInst *MemSet);
+LLVM_ABI void expandMemSetPatternAsLoop(MemSetPatternInst *MemSet);
 
 /// Expand \p AtomicMemCpy as a loop. \p AtomicMemCpy is not deleted.
-void expandAtomicMemCpyAsLoop(AnyMemCpyInst *AtomicMemCpy,
-                              const TargetTransformInfo &TTI,
-                              ScalarEvolution *SE);
+LLVM_ABI void expandAtomicMemCpyAsLoop(AnyMemCpyInst *AtomicMemCpy,
+                                       const TargetTransformInfo &TTI,
+                                       ScalarEvolution *SE);
 
 } // namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/ModuleUtils.h b/llvm/include/llvm/Transforms/Utils/ModuleUtils.h
index 2a52d3ed1431e..4036c4e947c75 100644
--- a/llvm/include/llvm/Transforms/Utils/ModuleUtils.h
+++ b/llvm/include/llvm/Transforms/Utils/ModuleUtils.h
@@ -17,6 +17,7 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/IR/GlobalIFunc.h"
 #include "llvm/Support/Alignment.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/MemoryBufferRef.h"
 #include <utility> // for std::pair
 
@@ -38,41 +39,44 @@ class Type;
 /// This wraps the function in the appropriate structure and stores it along
 /// side other global constructors. For details see
 /// https://llvm.org/docs/LangRef.html#the-llvm-global-ctors-global-variable
-void appendToGlobalCtors(Module &M, Function *F, int Priority,
-                         Constant *Data = nullptr);
+LLVM_ABI void appendToGlobalCtors(Module &M, Function *F, int Priority,
+                                  Constant *Data = nullptr);
 
 /// Same as appendToGlobalCtors(), but for global dtors.
-void appendToGlobalDtors(Module &M, Function *F, int Priority,
-                         Constant *Data = nullptr);
+LLVM_ABI void appendToGlobalDtors(Module &M, Function *F, int Priority,
+                                  Constant *Data = nullptr);
 
 /// Apply 'Fn' to the list of global ctors of module M and replace contructor
 /// record with the one returned by `Fn`. If `nullptr` was returned, the
 /// corresponding constructor will be removed from the array. For details see
 /// https://llvm.org/docs/LangRef.html#the-llvm-global-ctors-global-variable
 using GlobalCtorTransformFn = llvm::function_ref<Constant *(Constant *)>;
-void transformGlobalCtors(Module &M, const GlobalCtorTransformFn &Fn);
-void transformGlobalDtors(Module &M, const GlobalCtorTransformFn &Fn);
+LLVM_ABI void transformGlobalCtors(Module &M, const GlobalCtorTransformFn &Fn);
+LLVM_ABI void transformGlobalDtors(Module &M, const GlobalCtorTransformFn &Fn);
 
 /// Sets the KCFI type for the function. Used for compiler-generated functions
 /// that are indirectly called in instrumented code.
-void setKCFIType(Module &M, Function &F, StringRef MangledType);
+LLVM_ABI void setKCFIType(Module &M, Function &F, StringRef MangledType);
 
-FunctionCallee declareSanitizerInitFunction(Module &M, StringRef InitName,
-                                            ArrayRef<Type *> InitArgTypes,
-                                            bool Weak = false);
+LLVM_ABI FunctionCallee
+declareSanitizerInitFunction(Module &M, StringRef InitName,
+                             ArrayRef<Type *> InitArgTypes, bool Weak = false);
 
 /// Creates sanitizer constructor function.
 /// \return Returns pointer to constructor.
-Function *createSanitizerCtor(Module &M, StringRef CtorName);
+LLVM_ABI Function *createSanitizerCtor(Module &M, StringRef CtorName);
 
 /// Creates sanitizer constructor function, and calls sanitizer's init
 /// function from it.
 /// \return Returns pair of pointers to constructor, and init functions
 /// respectively.
-std::pair<Function *, FunctionCallee> createSanitizerCtorAndInitFunctions(
-    Module &M, StringRef CtorName, StringRef InitName,
-    ArrayRef<Type *> InitArgTypes, ArrayRef<Value *> InitArgs,
-    StringRef VersionCheckName = StringRef(), bool Weak = false);
+LLVM_ABI std::pair<Function *, FunctionCallee>
+createSanitizerCtorAndInitFunctions(Module &M, StringRef CtorName,
+                                    StringRef InitName,
+                                    ArrayRef<Type *> InitArgTypes,
+                                    ArrayRef<Value *> InitArgs,
+                                    StringRef VersionCheckName = StringRef(),
+                                    bool Weak = false);
 
 /// Creates sanitizer constructor function lazily. If a constructor and init
 /// function already exist, this function returns it. Otherwise it calls \c
@@ -81,7 +85,8 @@ std::pair<Function *, FunctionCallee> createSanitizerCtorAndInitFunctions(
 ///
 /// \return Returns pair of pointers to constructor, and init functions
 /// respectively.
-std::pair<Function *, FunctionCallee> getOrCreateSanitizerCtorAndInitFunctions(
+LLVM_ABI std::pair<Function *, FunctionCallee>
+getOrCreateSanitizerCtorAndInitFunctions(
     Module &M, StringRef CtorName, StringRef InitName,
     ArrayRef<Type *> InitArgTypes, ArrayRef<Value *> InitArgs,
     function_ref<void(Function *, FunctionCallee)> FunctionsCreatedCallback,
@@ -89,19 +94,19 @@ std::pair<Function *, FunctionCallee> getOrCreateSanitizerCtorAndInitFunctions(
 
 /// Rename all the anon globals in the module using a hash computed from
 /// the list of public globals in the module.
-bool nameUnamedGlobals(Module &M);
+LLVM_ABI bool nameUnamedGlobals(Module &M);
 
 /// Adds global values to the llvm.used list.
-void appendToUsed(Module &M, ArrayRef<GlobalValue *> Values);
+LLVM_ABI void appendToUsed(Module &M, ArrayRef<GlobalValue *> Values);
 
 /// Adds global values to the llvm.compiler.used list.
-void appendToCompilerUsed(Module &M, ArrayRef<GlobalValue *> Values);
+LLVM_ABI void appendToCompilerUsed(Module &M, ArrayRef<GlobalValue *> Values);
 
 /// Removes global values from the llvm.used and llvm.compiler.used arrays. \p
 /// ShouldRemove should return true for any initializer field that should not be
 /// included in the replacement global.
-void removeFromUsedLists(Module &M,
-                         function_ref<bool(Constant *)> ShouldRemove);
+LLVM_ABI void removeFromUsedLists(Module &M,
+                                  function_ref<bool(Constant *)> ShouldRemove);
 
 /// Filter out potentially dead comdat functions where other entries keep the
 /// entire comdat group alive.
@@ -116,8 +121,8 @@ void removeFromUsedLists(Module &M,
 /// After this routine finishes, the only remaining `Function`s in \p
 /// DeadComdatFunctions are those where every member of the comdat is listed
 /// and thus removing them is safe (provided *all* are removed).
-void filterDeadComdatFunctions(
-    SmallVectorImpl<Function *> &DeadComdatFunctions);
+LLVM_ABI void
+filterDeadComdatFunctions(SmallVectorImpl<Function *> &DeadComdatFunctions);
 
 /// Produce a unique identifier for this module by taking the MD5 sum of
 /// the names of the module's strong external symbols that are not comdat
@@ -129,13 +134,14 @@ void filterDeadComdatFunctions(
 /// If the module has no strong external symbols (such a module may still have a
 /// semantic effect if it performs global initialization), we cannot produce a
 /// unique identifier for this module, so we return the empty string.
-std::string getUniqueModuleId(Module *M);
+LLVM_ABI std::string getUniqueModuleId(Module *M);
 
 /// Embed the memory buffer \p Buf into the module \p M as a global using the
 /// specified section name. Also provide a metadata entry to identify it in the
 /// module using the same section name.
-void embedBufferInModule(Module &M, MemoryBufferRef Buf, StringRef SectionName,
-                         Align Alignment = Align(1));
+LLVM_ABI void embedBufferInModule(Module &M, MemoryBufferRef Buf,
+                                  StringRef SectionName,
+                                  Align Alignment = Align(1));
 
 /// Lower all calls to ifuncs by replacing uses with indirect calls loaded out
 /// of a global table initialized in a global constructor. This will introduce
@@ -149,8 +155,9 @@ void embedBufferInModule(Module &M, MemoryBufferRef Buf, StringRef SectionName,
 ///
 /// The processed ifuncs without remaining users will be removed from the
 /// module.
-bool lowerGlobalIFuncUsersAsGlobalCtor(
-    Module &M, ArrayRef<GlobalIFunc *> IFuncsToLower = {});
+LLVM_ABI bool
+lowerGlobalIFuncUsersAsGlobalCtor(Module &M,
+                                  ArrayRef<GlobalIFunc *> IFuncsToLower = {});
 
 } // End llvm namespace
 
diff --git a/llvm/include/llvm/Transforms/Utils/PredicateInfo.h b/llvm/include/llvm/Transforms/Utils/PredicateInfo.h
index 365b215c051fc..670bfaa5ad6fe 100644
--- a/llvm/include/llvm/Transforms/Utils/PredicateInfo.h
+++ b/llvm/include/llvm/Transforms/Utils/PredicateInfo.h
@@ -57,6 +57,7 @@
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/IR/ValueHandle.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -102,7 +103,7 @@ class PredicateBase : public ilist_node<PredicateBase> {
   }
 
   /// Fetch condition in the form of PredicateConstraint, if possible.
-  std::optional<PredicateConstraint> getConstraint() const;
+  LLVM_ABI std::optional<PredicateConstraint> getConstraint() const;
 
 protected:
   PredicateBase(PredicateType PT, Value *Op, Value *Condition)
@@ -176,13 +177,13 @@ class PredicateSwitch : public PredicateWithEdge {
 /// accesses.
 class PredicateInfo {
 public:
-  PredicateInfo(Function &, DominatorTree &, AssumptionCache &);
-  ~PredicateInfo();
+  LLVM_ABI PredicateInfo(Function &, DominatorTree &, AssumptionCache &);
+  LLVM_ABI ~PredicateInfo();
 
-  void verifyPredicateInfo() const;
+  LLVM_ABI void verifyPredicateInfo() const;
 
-  void dump() const;
-  void print(raw_ostream &) const;
+  LLVM_ABI void dump() const;
+  LLVM_ABI void print(raw_ostream &) const;
 
   const PredicateBase *getPredicateInfoFor(const Value *V) const {
     return PredicateMap.lookup(V);
@@ -214,13 +215,13 @@ class PredicateInfoPrinterPass
 
 public:
   explicit PredicateInfoPrinterPass(raw_ostream &OS) : OS(OS) {}
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
   static bool isRequired() { return true; }
 };
 
 /// Verifier pass for \c PredicateInfo.
 struct PredicateInfoVerifierPass : PassInfoMixin<PredicateInfoVerifierPass> {
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
   static bool isRequired() { return true; }
 };
 
diff --git a/llvm/include/llvm/Transforms/Utils/PromoteMemToReg.h b/llvm/include/llvm/Transforms/Utils/PromoteMemToReg.h
index f827ffd3e676a..ab0bd3a5a9962 100644
--- a/llvm/include/llvm/Transforms/Utils/PromoteMemToReg.h
+++ b/llvm/include/llvm/Transforms/Utils/PromoteMemToReg.h
@@ -27,7 +27,7 @@ class AssumptionCache;
 /// (transitively) using this alloca. This also enforces that there is only
 /// ever one layer of bitcasts or GEPs between the alloca and the lifetime
 /// markers.
-bool isAllocaPromotable(const AllocaInst *AI);
+LLVM_ABI bool isAllocaPromotable(const AllocaInst *AI);
 
 /// Promote the specified list of alloca instructions into scalar
 /// registers, inserting PHI nodes as appropriate.
@@ -36,8 +36,8 @@ bool isAllocaPromotable(const AllocaInst *AI);
 /// does not modify the CFG of the function at all.  All allocas must be from
 /// the same function.
 ///
-void PromoteMemToReg(ArrayRef<AllocaInst *> Allocas, DominatorTree &DT,
-                     AssumptionCache *AC = nullptr);
+LLVM_ABI void PromoteMemToReg(ArrayRef<AllocaInst *> Allocas, DominatorTree &DT,
+                              AssumptionCache *AC = nullptr);
 
 } // End llvm namespace
 
diff --git a/llvm/include/llvm/Transforms/Utils/SCCPSolver.h b/llvm/include/llvm/Transforms/Utils/SCCPSolver.h
index a5b56dcdc6290..c8fe4301b2b48 100644
--- a/llvm/include/llvm/Transforms/Utils/SCCPSolver.h
+++ b/llvm/include/llvm/Transforms/Utils/SCCPSolver.h
@@ -18,6 +18,7 @@
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Analysis/DomTreeUpdater.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/PredicateInfo.h"
 #include <vector>
 
@@ -66,149 +67,155 @@ class SCCPSolver {
   std::unique_ptr<SCCPInstVisitor> Visitor;
 
 public:
+  LLVM_ABI
   SCCPSolver(const DataLayout &DL,
              std::function<const TargetLibraryInfo &(Function &)> GetTLI,
              LLVMContext &Ctx);
 
-  ~SCCPSolver();
+  LLVM_ABI ~SCCPSolver();
 
-  void addPredicateInfo(Function &F, DominatorTree &DT, AssumptionCache &AC);
+  LLVM_ABI void addPredicateInfo(Function &F, DominatorTree &DT,
+                                 AssumptionCache &AC);
 
   /// markBlockExecutable - This method can be used by clients to mark all of
   /// the blocks that are known to be intrinsically live in the processed unit.
   /// This returns true if the block was not considered live before.
-  bool markBlockExecutable(BasicBlock *BB);
+  LLVM_ABI bool markBlockExecutable(BasicBlock *BB);
 
-  const PredicateBase *getPredicateInfoFor(Instruction *I);
+  LLVM_ABI const PredicateBase *getPredicateInfoFor(Instruction *I);
 
   /// trackValueOfGlobalVariable - Clients can use this method to
   /// inform the SCCPSolver that it should track loads and stores to the
   /// specified global variable if it can.  This is only legal to call if
   /// performing Interprocedural SCCP.
-  void trackValueOfGlobalVariable(GlobalVariable *GV);
+  LLVM_ABI void trackValueOfGlobalVariable(GlobalVariable *GV);
 
   /// addTrackedFunction - If the SCCP solver is supposed to track calls into
   /// and out of the specified function (which cannot have its address taken),
   /// this method must be called.
-  void addTrackedFunction(Function *F);
+  LLVM_ABI void addTrackedFunction(Function *F);
 
   /// Add function to the list of functions whose return cannot be modified.
-  void addToMustPreserveReturnsInFunctions(Function *F);
+  LLVM_ABI void addToMustPreserveReturnsInFunctions(Function *F);
 
   /// Returns true if the return of the given function cannot be modified.
-  bool mustPreserveReturn(Function *F);
+  LLVM_ABI bool mustPreserveReturn(Function *F);
 
-  void addArgumentTrackedFunction(Function *F);
+  LLVM_ABI void addArgumentTrackedFunction(Function *F);
 
   /// Returns true if the given function is in the solver's set of
   /// argument-tracked functions.
-  bool isArgumentTrackedFunction(Function *F);
+  LLVM_ABI bool isArgumentTrackedFunction(Function *F);
 
-  const SmallPtrSetImpl<Function *> &getArgumentTrackedFunctions() const;
+  LLVM_ABI const SmallPtrSetImpl<Function *> &
+  getArgumentTrackedFunctions() const;
 
   /// Solve - Solve for constants and executable blocks.
-  void solve();
+  LLVM_ABI void solve();
 
   /// resolvedUndefsIn - While solving the dataflow for a function, we assume
   /// that branches on undef values cannot reach any of their successors.
   /// However, this is not a safe assumption.  After we solve dataflow, this
   /// method should be use to handle this.  If this returns true, the solver
   /// should be rerun.
-  bool resolvedUndefsIn(Function &F);
+  LLVM_ABI bool resolvedUndefsIn(Function &F);
 
-  void solveWhileResolvedUndefsIn(Module &M);
+  LLVM_ABI void solveWhileResolvedUndefsIn(Module &M);
 
-  void solveWhileResolvedUndefsIn(SmallVectorImpl<Function *> &WorkList);
+  LLVM_ABI void
+  solveWhileResolvedUndefsIn(SmallVectorImpl<Function *> &WorkList);
 
-  void solveWhileResolvedUndefs();
+  LLVM_ABI void solveWhileResolvedUndefs();
 
-  bool isBlockExecutable(BasicBlock *BB) const;
+  LLVM_ABI bool isBlockExecutable(BasicBlock *BB) const;
 
   // isEdgeFeasible - Return true if the control flow edge from the 'From' basic
   // block to the 'To' basic block is currently feasible.
-  bool isEdgeFeasible(BasicBlock *From, BasicBlock *To) const;
+  LLVM_ABI bool isEdgeFeasible(BasicBlock *From, BasicBlock *To) const;
 
-  std::vector<ValueLatticeElement> getStructLatticeValueFor(Value *V) const;
+  LLVM_ABI std::vector<ValueLatticeElement>
+  getStructLatticeValueFor(Value *V) const;
 
-  void removeLatticeValueFor(Value *V);
+  LLVM_ABI void removeLatticeValueFor(Value *V);
 
   /// Invalidate the Lattice Value of \p Call and its users after specializing
   /// the call. Then recompute it.
-  void resetLatticeValueFor(CallBase *Call);
+  LLVM_ABI void resetLatticeValueFor(CallBase *Call);
 
-  const ValueLatticeElement &getLatticeValueFor(Value *V) const;
+  LLVM_ABI const ValueLatticeElement &getLatticeValueFor(Value *V) const;
 
   /// getTrackedRetVals - Get the inferred return value map.
-  const MapVector<Function *, ValueLatticeElement> &getTrackedRetVals() const;
+  LLVM_ABI const MapVector<Function *, ValueLatticeElement> &
+  getTrackedRetVals() const;
 
   /// getTrackedGlobals - Get and return the set of inferred initializers for
   /// global variables.
-  const DenseMap<GlobalVariable *, ValueLatticeElement> &
+  LLVM_ABI const DenseMap<GlobalVariable *, ValueLatticeElement> &
   getTrackedGlobals() const;
 
   /// getMRVFunctionsTracked - Get the set of functions which return multiple
   /// values tracked by the pass.
-  const SmallPtrSet<Function *, 16> &getMRVFunctionsTracked() const;
+  LLVM_ABI const SmallPtrSet<Function *, 16> &getMRVFunctionsTracked() const;
 
   /// markOverdefined - Mark the specified value overdefined.  This
   /// works with both scalars and structs.
-  void markOverdefined(Value *V);
+  LLVM_ABI void markOverdefined(Value *V);
 
   /// trackValueOfArgument - Mark the specified argument overdefined unless it
   /// have range attribute.  This works with both scalars and structs.
-  void trackValueOfArgument(Argument *V);
+  LLVM_ABI void trackValueOfArgument(Argument *V);
 
   // isStructLatticeConstant - Return true if all the lattice values
   // corresponding to elements of the structure are constants,
   // false otherwise.
-  bool isStructLatticeConstant(Function *F, StructType *STy);
+  LLVM_ABI bool isStructLatticeConstant(Function *F, StructType *STy);
 
   /// Helper to return a Constant if \p LV is either a constant or a constant
   /// range with a single element.
-  Constant *getConstant(const ValueLatticeElement &LV, Type *Ty) const;
+  LLVM_ABI Constant *getConstant(const ValueLatticeElement &LV, Type *Ty) const;
 
   /// Return either a Constant or nullptr for a given Value.
-  Constant *getConstantOrNull(Value *V) const;
+  LLVM_ABI Constant *getConstantOrNull(Value *V) const;
 
   /// Set the Lattice Value for the arguments of a specialization \p F.
   /// If an argument is Constant then its lattice value is marked with the
   /// corresponding actual argument in \p Args. Otherwise, its lattice value
   /// is inherited (copied) from the corresponding formal argument in \p Args.
-  void setLatticeValueForSpecializationArguments(Function *F,
-                                       const SmallVectorImpl<ArgInfo> &Args);
+  LLVM_ABI void setLatticeValueForSpecializationArguments(
+      Function *F, const SmallVectorImpl<ArgInfo> &Args);
 
   /// Mark all of the blocks in function \p F non-executable. Clients can used
   /// this method to erase a function from the module (e.g., if it has been
   /// completely specialized and is no longer needed).
-  void markFunctionUnreachable(Function *F);
+  LLVM_ABI void markFunctionUnreachable(Function *F);
 
-  void visit(Instruction *I);
-  void visitCall(CallInst &I);
+  LLVM_ABI void visit(Instruction *I);
+  LLVM_ABI void visitCall(CallInst &I);
 
-  bool simplifyInstsInBlock(BasicBlock &BB,
-                            SmallPtrSetImpl<Value *> &InsertedValues,
-                            Statistic &InstRemovedStat,
-                            Statistic &InstReplacedStat);
+  LLVM_ABI bool simplifyInstsInBlock(BasicBlock &BB,
+                                     SmallPtrSetImpl<Value *> &InsertedValues,
+                                     Statistic &InstRemovedStat,
+                                     Statistic &InstReplacedStat);
 
-  bool removeNonFeasibleEdges(BasicBlock *BB, DomTreeUpdater &DTU,
-                              BasicBlock *&NewUnreachableBB) const;
+  LLVM_ABI bool removeNonFeasibleEdges(BasicBlock *BB, DomTreeUpdater &DTU,
+                                       BasicBlock *&NewUnreachableBB) const;
 
-  void inferReturnAttributes() const;
-  void inferArgAttributes() const;
+  LLVM_ABI void inferReturnAttributes() const;
+  LLVM_ABI void inferArgAttributes() const;
 
-  bool tryToReplaceWithConstant(Value *V);
+  LLVM_ABI bool tryToReplaceWithConstant(Value *V);
 
   // Helper to check if \p LV is either a constant or a constant
   // range with a single element. This should cover exactly the same cases as
   // the old ValueLatticeElement::isConstant() and is intended to be used in the
   // transition to ValueLatticeElement.
-  static bool isConstant(const ValueLatticeElement &LV);
+  LLVM_ABI static bool isConstant(const ValueLatticeElement &LV);
 
   // Helper to check if \p LV is either overdefined or a constant range with
   // more than a single element. This should cover exactly the same cases as the
   // old ValueLatticeElement::isOverdefined() and is intended to be used in the
   // transition to ValueLatticeElement.
-  static bool isOverdefined(const ValueLatticeElement &LV);
+  LLVM_ABI static bool isOverdefined(const ValueLatticeElement &LV);
 };
 } // namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/SSAUpdaterBulk.h b/llvm/include/llvm/Transforms/Utils/SSAUpdaterBulk.h
index b2cf29608f58b..48e8c86f7d873 100644
--- a/llvm/include/llvm/Transforms/Utils/SSAUpdaterBulk.h
+++ b/llvm/include/llvm/Transforms/Utils/SSAUpdaterBulk.h
@@ -16,6 +16,7 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/IR/PredIteratorCache.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -58,15 +59,15 @@ class SSAUpdaterBulk {
   /// Add a new variable to the SSA rewriter. This needs to be called before
   /// AddAvailableValue or AddUse calls. The return value is the variable ID,
   /// which needs to be passed to AddAvailableValue and AddUse.
-  unsigned AddVariable(StringRef Name, Type *Ty);
+  LLVM_ABI unsigned AddVariable(StringRef Name, Type *Ty);
 
   /// Indicate that a rewritten value is available in the specified block with
   /// the specified value.
-  void AddAvailableValue(unsigned Var, BasicBlock *BB, Value *V);
+  LLVM_ABI void AddAvailableValue(unsigned Var, BasicBlock *BB, Value *V);
 
   /// Record a use of the symbolic value. This use will be updated with a
   /// rewritten value when RewriteAllUses is called.
-  void AddUse(unsigned Var, Use *U);
+  LLVM_ABI void AddUse(unsigned Var, Use *U);
 
   /// Perform all the necessary updates, including new PHI-nodes insertion and
   /// the requested uses update.
@@ -75,8 +76,9 @@ class SSAUpdaterBulk {
   /// locations for new phi-nodes insertions. If a nonnull pointer to a vector
   /// InsertedPHIs is passed, all the new phi-nodes will be added to this
   /// vector.
-  void RewriteAllUses(DominatorTree *DT,
-                      SmallVectorImpl<PHINode *> *InsertedPHIs = nullptr);
+  LLVM_ABI void
+  RewriteAllUses(DominatorTree *DT,
+                 SmallVectorImpl<PHINode *> *InsertedPHIs = nullptr);
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/Transforms/Utils/SanitizerStats.h b/llvm/include/llvm/Transforms/Utils/SanitizerStats.h
index 14e8ae045cddd..05539c724d3e1 100644
--- a/llvm/include/llvm/Transforms/Utils/SanitizerStats.h
+++ b/llvm/include/llvm/Transforms/Utils/SanitizerStats.h
@@ -14,6 +14,7 @@
 #define LLVM_TRANSFORMS_UTILS_SANITIZERSTATS_H
 
 #include "llvm/IR/IRBuilder.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -30,14 +31,14 @@ enum SanitizerStatKind {
 };
 
 struct SanitizerStatReport {
-  SanitizerStatReport(Module *M);
+  LLVM_ABI SanitizerStatReport(Module *M);
 
   /// Generates code into B that increments a location-specific counter tagged
   /// with the given sanitizer kind SK.
-  void create(IRBuilder<> &B, SanitizerStatKind SK);
+  LLVM_ABI void create(IRBuilder<> &B, SanitizerStatKind SK);
 
   /// Finalize module stats array and add global constructor to register it.
-  void finish();
+  LLVM_ABI void finish();
 
 private:
   Module *M;
diff --git a/llvm/include/llvm/Transforms/Utils/ScalarEvolutionExpander.h b/llvm/include/llvm/Transforms/Utils/ScalarEvolutionExpander.h
index 7dd754a2bc0de..a101151eed7cc 100644
--- a/llvm/include/llvm/Transforms/Utils/ScalarEvolutionExpander.h
+++ b/llvm/include/llvm/Transforms/Utils/ScalarEvolutionExpander.h
@@ -23,10 +23,11 @@
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/ValueHandle.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/InstructionCost.h"
 
 namespace llvm {
-extern cl::opt<unsigned> SCEVCheapExpansionBudget;
+LLVM_ABI extern cl::opt<unsigned> SCEVCheapExpansionBudget;
 
 /// struct for holding enough information to help calculate the cost of the
 /// given SCEV when expanded into IR.
@@ -50,8 +51,8 @@ struct PoisonFlags {
   unsigned SameSign : 1;
   GEPNoWrapFlags GEPNW;
 
-  PoisonFlags(const Instruction *I);
-  void apply(Instruction *I);
+  LLVM_ABI PoisonFlags(const Instruction *I);
+  LLVM_ABI void apply(Instruction *I);
 };
 
 /// This class uses information about analyze scalars to rewrite expressions
@@ -271,8 +272,8 @@ class SCEVExpander : public SCEVVisitor<SCEVExpander, Value *> {
   }
 
   /// Return the induction variable increment's IV operand.
-  Instruction *getIVIncOperand(Instruction *IncV, Instruction *InsertPos,
-                               bool allowScale);
+  LLVM_ABI Instruction *
+  getIVIncOperand(Instruction *IncV, Instruction *InsertPos, bool allowScale);
 
   /// Utility for hoisting \p IncV (with all subexpressions requried for its
   /// computation) before \p InsertPos. If \p RecomputePoisonFlags is set, drops
@@ -280,36 +281,40 @@ class SCEVExpander : public SCEVVisitor<SCEVExpander, Value *> {
   /// re-infer them in the new location. It should be used when we are going to
   /// introduce a new use in the new position that didn't exist before, and may
   /// trigger new UB in case of poison.
-  bool hoistIVInc(Instruction *IncV, Instruction *InsertPos,
-                  bool RecomputePoisonFlags = false);
+  LLVM_ABI bool hoistIVInc(Instruction *IncV, Instruction *InsertPos,
+                           bool RecomputePoisonFlags = false);
 
   /// Return true if both increments directly increment the corresponding IV PHI
   /// nodes and have the same opcode. It is not safe to re-use the flags from
   /// the original increment, if it is more complex and SCEV expansion may have
   /// yielded a more simplified wider increment.
-  static bool canReuseFlagsFromOriginalIVInc(PHINode *OrigPhi, PHINode *WidePhi,
-                                             Instruction *OrigInc,
-                                             Instruction *WideInc);
+  LLVM_ABI static bool canReuseFlagsFromOriginalIVInc(PHINode *OrigPhi,
+                                                      PHINode *WidePhi,
+                                                      Instruction *OrigInc,
+                                                      Instruction *WideInc);
 
   /// replace congruent phis with their most canonical representative. Return
   /// the number of phis eliminated.
-  unsigned replaceCongruentIVs(Loop *L, const DominatorTree *DT,
-                               SmallVectorImpl<WeakTrackingVH> &DeadInsts,
-                               const TargetTransformInfo *TTI = nullptr);
+  LLVM_ABI unsigned
+  replaceCongruentIVs(Loop *L, const DominatorTree *DT,
+                      SmallVectorImpl<WeakTrackingVH> &DeadInsts,
+                      const TargetTransformInfo *TTI = nullptr);
 
   /// Return true if the given expression is safe to expand in the sense that
   /// all materialized values are safe to speculate anywhere their operands are
   /// defined, and the expander is capable of expanding the expression.
-  bool isSafeToExpand(const SCEV *S) const;
+  LLVM_ABI bool isSafeToExpand(const SCEV *S) const;
 
   /// Return true if the given expression is safe to expand in the sense that
   /// all materialized values are defined and safe to speculate at the specified
   /// location and their operands are defined at this location.
-  bool isSafeToExpandAt(const SCEV *S, const Instruction *InsertionPoint) const;
+  LLVM_ABI bool isSafeToExpandAt(const SCEV *S,
+                                 const Instruction *InsertionPoint) const;
 
   /// Insert code to directly compute the specified SCEV expression into the
   /// program.  The code is inserted into the specified block.
-  Value *expandCodeFor(const SCEV *SH, Type *Ty, BasicBlock::iterator I);
+  LLVM_ABI Value *expandCodeFor(const SCEV *SH, Type *Ty,
+                                BasicBlock::iterator I);
   Value *expandCodeFor(const SCEV *SH, Type *Ty, Instruction *I) {
     return expandCodeFor(SH, Ty, I->getIterator());
   }
@@ -318,29 +323,32 @@ class SCEVExpander : public SCEVVisitor<SCEVExpander, Value *> {
   /// program.  The code is inserted into the SCEVExpander's current
   /// insertion point. If a type is specified, the result will be expanded to
   /// have that type, with a cast if necessary.
-  Value *expandCodeFor(const SCEV *SH, Type *Ty = nullptr);
+  LLVM_ABI Value *expandCodeFor(const SCEV *SH, Type *Ty = nullptr);
 
   /// Generates a code sequence that evaluates this predicate.  The inserted
   /// instructions will be at position \p Loc.  The result will be of type i1
   /// and will have a value of 0 when the predicate is false and 1 otherwise.
-  Value *expandCodeForPredicate(const SCEVPredicate *Pred, Instruction *Loc);
+  LLVM_ABI Value *expandCodeForPredicate(const SCEVPredicate *Pred,
+                                         Instruction *Loc);
 
   /// A specialized variant of expandCodeForPredicate, handling the case when
   /// we are expanding code for a SCEVComparePredicate.
-  Value *expandComparePredicate(const SCEVComparePredicate *Pred,
-                                Instruction *Loc);
+  LLVM_ABI Value *expandComparePredicate(const SCEVComparePredicate *Pred,
+                                         Instruction *Loc);
 
   /// Generates code that evaluates if the \p AR expression will overflow.
-  Value *generateOverflowCheck(const SCEVAddRecExpr *AR, Instruction *Loc,
-                               bool Signed);
+  LLVM_ABI Value *generateOverflowCheck(const SCEVAddRecExpr *AR,
+                                        Instruction *Loc, bool Signed);
 
   /// A specialized variant of expandCodeForPredicate, handling the case when
   /// we are expanding code for a SCEVWrapPredicate.
-  Value *expandWrapPredicate(const SCEVWrapPredicate *P, Instruction *Loc);
+  LLVM_ABI Value *expandWrapPredicate(const SCEVWrapPredicate *P,
+                                      Instruction *Loc);
 
   /// A specialized variant of expandCodeForPredicate, handling the case when
   /// we are expanding code for a SCEVUnionPredicate.
-  Value *expandUnionPredicate(const SCEVUnionPredicate *Pred, Instruction *Loc);
+  LLVM_ABI Value *expandUnionPredicate(const SCEVUnionPredicate *Pred,
+                                       Instruction *Loc);
 
   /// Set the current IV increment loop and position.
   void setIVIncInsertPos(const Loop *L, Instruction *Pos) {
@@ -417,24 +425,24 @@ class SCEVExpander : public SCEVVisitor<SCEVExpander, Value *> {
   ///
   /// Note that this function does not perform an exhaustive search. I.e if it
   /// didn't find any value it does not mean that there is no such value.
-  bool hasRelatedExistingExpansion(const SCEV *S, const Instruction *At,
-                                   Loop *L);
+  LLVM_ABI bool hasRelatedExistingExpansion(const SCEV *S,
+                                            const Instruction *At, Loop *L);
 
   /// Returns a suitable insert point after \p I, that dominates \p
   /// MustDominate. Skips instructions inserted by the expander.
-  BasicBlock::iterator findInsertPointAfter(Instruction *I,
-                                            Instruction *MustDominate) const;
+  LLVM_ABI BasicBlock::iterator
+  findInsertPointAfter(Instruction *I, Instruction *MustDominate) const;
 
 private:
   LLVMContext &getContext() const { return SE.getContext(); }
 
   /// Recursive helper function for isHighCostExpansion.
-  bool isHighCostExpansionHelper(const SCEVOperand &WorkItem, Loop *L,
-                                 const Instruction &At, InstructionCost &Cost,
-                                 unsigned Budget,
-                                 const TargetTransformInfo &TTI,
-                                 SmallPtrSetImpl<const SCEV *> &Processed,
-                                 SmallVectorImpl<SCEVOperand> &Worklist);
+  LLVM_ABI bool
+  isHighCostExpansionHelper(const SCEVOperand &WorkItem, Loop *L,
+                            const Instruction &At, InstructionCost &Cost,
+                            unsigned Budget, const TargetTransformInfo &TTI,
+                            SmallPtrSetImpl<const SCEV *> &Processed,
+                            SmallVectorImpl<SCEVOperand> &Worklist);
 
   /// Insert the specified binary operator, doing a small amount of work to
   /// avoid inserting an obviously redundant operation, and hoisting to an
@@ -466,7 +474,7 @@ class SCEVExpander : public SCEVVisitor<SCEVExpander, Value *> {
       const SCEV *S, const Instruction *InsertPt,
       SmallVectorImpl<Instruction *> &DropPoisonGeneratingInsts);
 
-  Value *expand(const SCEV *S);
+  LLVM_ABI Value *expand(const SCEV *S);
   Value *expand(const SCEV *S, BasicBlock::iterator I) {
     setInsertPoint(I);
     return expand(S);
@@ -514,7 +522,7 @@ class SCEVExpander : public SCEVVisitor<SCEVExpander, Value *> {
 
   Value *visitUnknown(const SCEVUnknown *S) { return S->getValue(); }
 
-  void rememberInstruction(Value *I);
+  LLVM_ABI void rememberInstruction(Value *I);
 
   void rememberFlags(Instruction *I);
 
@@ -561,7 +569,7 @@ class SCEVExpanderCleaner {
   /// Indicate that the result of the expansion is used.
   void markResultUsed() { ResultUsed = true; }
 
-  void cleanup();
+  LLVM_ABI void cleanup();
 };
 } // namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/SizeOpts.h b/llvm/include/llvm/Transforms/Utils/SizeOpts.h
index a9e72768f81e3..595ee91e5ff0c 100644
--- a/llvm/include/llvm/Transforms/Utils/SizeOpts.h
+++ b/llvm/include/llvm/Transforms/Utils/SizeOpts.h
@@ -15,17 +15,18 @@
 
 #include "llvm/Analysis/ProfileSummaryInfo.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
-extern cl::opt<bool> EnablePGSO;
-extern cl::opt<bool> PGSOLargeWorkingSetSizeOnly;
-extern cl::opt<bool> PGSOColdCodeOnly;
-extern cl::opt<bool> PGSOColdCodeOnlyForInstrPGO;
-extern cl::opt<bool> PGSOColdCodeOnlyForSamplePGO;
-extern cl::opt<bool> PGSOColdCodeOnlyForPartialSamplePGO;
-extern cl::opt<bool> ForcePGSO;
-extern cl::opt<int> PgsoCutoffInstrProf;
-extern cl::opt<int> PgsoCutoffSampleProf;
+LLVM_ABI extern cl::opt<bool> EnablePGSO;
+LLVM_ABI extern cl::opt<bool> PGSOLargeWorkingSetSizeOnly;
+LLVM_ABI extern cl::opt<bool> PGSOColdCodeOnly;
+LLVM_ABI extern cl::opt<bool> PGSOColdCodeOnlyForInstrPGO;
+LLVM_ABI extern cl::opt<bool> PGSOColdCodeOnlyForSamplePGO;
+LLVM_ABI extern cl::opt<bool> PGSOColdCodeOnlyForPartialSamplePGO;
+LLVM_ABI extern cl::opt<bool> ForcePGSO;
+LLVM_ABI extern cl::opt<int> PgsoCutoffInstrProf;
+LLVM_ABI extern cl::opt<int> PgsoCutoffSampleProf;
 
 class BasicBlock;
 class BlockFrequencyInfo;
@@ -90,15 +91,17 @@ bool shouldOptimizeForSizeImpl(BlockTOrBlockFreq BBOrBlockFreq,
 
 /// Returns true if function \p F is suggested to be size-optimized based on the
 /// profile.
-bool shouldOptimizeForSize(const Function *F, ProfileSummaryInfo *PSI,
-                           BlockFrequencyInfo *BFI,
-                           PGSOQueryType QueryType = PGSOQueryType::Other);
+LLVM_ABI bool
+shouldOptimizeForSize(const Function *F, ProfileSummaryInfo *PSI,
+                      BlockFrequencyInfo *BFI,
+                      PGSOQueryType QueryType = PGSOQueryType::Other);
 
 /// Returns true if basic block \p BB is suggested to be size-optimized based on
 /// the profile.
-bool shouldOptimizeForSize(const BasicBlock *BB, ProfileSummaryInfo *PSI,
-                           BlockFrequencyInfo *BFI,
-                           PGSOQueryType QueryType = PGSOQueryType::Other);
+LLVM_ABI bool
+shouldOptimizeForSize(const BasicBlock *BB, ProfileSummaryInfo *PSI,
+                      BlockFrequencyInfo *BFI,
+                      PGSOQueryType QueryType = PGSOQueryType::Other);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/SplitModule.h b/llvm/include/llvm/Transforms/Utils/SplitModule.h
index e7e8ee6279ace..74e8bf21294ae 100644
--- a/llvm/include/llvm/Transforms/Utils/SplitModule.h
+++ b/llvm/include/llvm/Transforms/Utils/SplitModule.h
@@ -16,6 +16,7 @@
 #define LLVM_TRANSFORMS_UTILS_SPLITMODULE_H
 
 #include "llvm/ADT/STLFunctionalExtras.h"
+#include "llvm/Support/Compiler.h"
 #include <memory>
 
 namespace llvm {
@@ -35,10 +36,10 @@ class Module;
 ///   module.
 /// - Internal symbols defined in module-level inline asm should be visible to
 ///   each partition.
-void SplitModule(
-    Module &M, unsigned N,
-    function_ref<void(std::unique_ptr<Module> MPart)> ModuleCallback,
-    bool PreserveLocals = false, bool RoundRobin = false);
+LLVM_ABI void
+SplitModule(Module &M, unsigned N,
+            function_ref<void(std::unique_ptr<Module> MPart)> ModuleCallback,
+            bool PreserveLocals = false, bool RoundRobin = false);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/SymbolRewriter.h b/llvm/include/llvm/Transforms/Utils/SymbolRewriter.h
index 6f05e95b2f5be..10c5c7c49771b 100644
--- a/llvm/include/llvm/Transforms/Utils/SymbolRewriter.h
+++ b/llvm/include/llvm/Transforms/Utils/SymbolRewriter.h
@@ -33,6 +33,7 @@
 #define LLVM_TRANSFORMS_UTILS_SYMBOLREWRITER_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 #include <list>
 #include <memory>
 #include <string>
@@ -92,7 +93,8 @@ using RewriteDescriptorList = std::list<std::unique_ptr<RewriteDescriptor>>;
 
 class RewriteMapParser {
 public:
-  bool parse(const std::string &MapFile, RewriteDescriptorList *Descriptors);
+  LLVM_ABI bool parse(const std::string &MapFile,
+                      RewriteDescriptorList *Descriptors);
 
 private:
   bool parse(std::unique_ptr<MemoryBuffer> &MapFile, RewriteDescriptorList *DL);
@@ -121,13 +123,13 @@ class RewriteSymbolPass : public PassInfoMixin<RewriteSymbolPass> {
     Descriptors.splice(Descriptors.begin(), DL);
   }
 
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 
   // Glue for old PM
-  bool runImpl(Module &M);
+  LLVM_ABI bool runImpl(Module &M);
 
 private:
-  void loadAndParseMapFiles();
+  LLVM_ABI void loadAndParseMapFiles();
 
   SymbolRewriter::RewriteDescriptorList Descriptors;
 };
diff --git a/llvm/include/llvm/Transforms/Utils/UnrollLoop.h b/llvm/include/llvm/Transforms/Utils/UnrollLoop.h
index 6759afd8077e9..765c613b04a44 100644
--- a/llvm/include/llvm/Transforms/Utils/UnrollLoop.h
+++ b/llvm/include/llvm/Transforms/Utils/UnrollLoop.h
@@ -18,6 +18,7 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/Analysis/CodeMetrics.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/InstructionCost.h"
 
 namespace llvm {
@@ -48,9 +49,10 @@ const char *const LLVMLoopUnrollFollowupRemainder =
     "llvm.loop.unroll.followup_remainder";
 /// @}
 
-const Loop* addClonedBlockToLoopInfo(BasicBlock *OriginalBB,
-                                     BasicBlock *ClonedBB, LoopInfo *LI,
-                                     NewLoopsMap &NewLoops);
+LLVM_ABI const Loop *addClonedBlockToLoopInfo(BasicBlock *OriginalBB,
+                                              BasicBlock *ClonedBB,
+                                              LoopInfo *LI,
+                                              NewLoopsMap &NewLoops);
 
 /// Represents the result of a \c UnrollLoop invocation.
 enum class LoopUnrollResult {
@@ -79,15 +81,16 @@ struct UnrollLoopOptions {
   bool RuntimeUnrollMultiExit = false;
 };
 
-LoopUnrollResult UnrollLoop(Loop *L, UnrollLoopOptions ULO, LoopInfo *LI,
-                            ScalarEvolution *SE, DominatorTree *DT,
-                            AssumptionCache *AC,
-                            const llvm::TargetTransformInfo *TTI,
-                            OptimizationRemarkEmitter *ORE, bool PreserveLCSSA,
-                            Loop **RemainderLoop = nullptr,
-                            AAResults *AA = nullptr);
+LLVM_ABI LoopUnrollResult UnrollLoop(Loop *L, UnrollLoopOptions ULO,
+                                     LoopInfo *LI, ScalarEvolution *SE,
+                                     DominatorTree *DT, AssumptionCache *AC,
+                                     const llvm::TargetTransformInfo *TTI,
+                                     OptimizationRemarkEmitter *ORE,
+                                     bool PreserveLCSSA,
+                                     Loop **RemainderLoop = nullptr,
+                                     AAResults *AA = nullptr);
 
-bool UnrollRuntimeLoopRemainder(
+LLVM_ABI bool UnrollRuntimeLoopRemainder(
     Loop *L, unsigned Count, bool AllowExpensiveTripCount,
     bool UseEpilogRemainder, bool UnrollRemainder, bool ForgetAllSCEV,
     LoopInfo *LI, ScalarEvolution *SE, DominatorTree *DT, AssumptionCache *AC,
@@ -95,26 +98,25 @@ bool UnrollRuntimeLoopRemainder(
     unsigned SCEVExpansionBudget, bool RuntimeUnrollMultiExit,
     Loop **ResultLoop = nullptr);
 
-LoopUnrollResult UnrollAndJamLoop(Loop *L, unsigned Count, unsigned TripCount,
-                                  unsigned TripMultiple, bool UnrollRemainder,
-                                  LoopInfo *LI, ScalarEvolution *SE,
-                                  DominatorTree *DT, AssumptionCache *AC,
-                                  const TargetTransformInfo *TTI,
-                                  OptimizationRemarkEmitter *ORE,
-                                  Loop **EpilogueLoop = nullptr);
+LLVM_ABI LoopUnrollResult UnrollAndJamLoop(
+    Loop *L, unsigned Count, unsigned TripCount, unsigned TripMultiple,
+    bool UnrollRemainder, LoopInfo *LI, ScalarEvolution *SE, DominatorTree *DT,
+    AssumptionCache *AC, const TargetTransformInfo *TTI,
+    OptimizationRemarkEmitter *ORE, Loop **EpilogueLoop = nullptr);
 
-bool isSafeToUnrollAndJam(Loop *L, ScalarEvolution &SE, DominatorTree &DT,
-                          DependenceInfo &DI, LoopInfo &LI);
+LLVM_ABI bool isSafeToUnrollAndJam(Loop *L, ScalarEvolution &SE,
+                                   DominatorTree &DT, DependenceInfo &DI,
+                                   LoopInfo &LI);
 
-void simplifyLoopAfterUnroll(Loop *L, bool SimplifyIVs, LoopInfo *LI,
-                             ScalarEvolution *SE, DominatorTree *DT,
-                             AssumptionCache *AC,
-                             const TargetTransformInfo *TTI,
-                             AAResults *AA = nullptr);
+LLVM_ABI void simplifyLoopAfterUnroll(Loop *L, bool SimplifyIVs, LoopInfo *LI,
+                                      ScalarEvolution *SE, DominatorTree *DT,
+                                      AssumptionCache *AC,
+                                      const TargetTransformInfo *TTI,
+                                      AAResults *AA = nullptr);
 
-MDNode *GetUnrollMetadata(MDNode *LoopID, StringRef Name);
+LLVM_ABI MDNode *GetUnrollMetadata(MDNode *LoopID, StringRef Name);
 
-TargetTransformInfo::UnrollingPreferences gatherUnrollingPreferences(
+LLVM_ABI TargetTransformInfo::UnrollingPreferences gatherUnrollingPreferences(
     Loop *L, ScalarEvolution &SE, const TargetTransformInfo &TTI,
     BlockFrequencyInfo *BFI, ProfileSummaryInfo *PSI,
     llvm::OptimizationRemarkEmitter &ORE, int OptLevel,
@@ -136,32 +138,30 @@ class UnrollCostEstimator {
   ConvergenceKind Convergence;
   bool ConvergenceAllowsRuntime;
 
-  UnrollCostEstimator(const Loop *L, const TargetTransformInfo &TTI,
-                      const SmallPtrSetImpl<const Value *> &EphValues,
-                      unsigned BEInsns);
+  LLVM_ABI UnrollCostEstimator(const Loop *L, const TargetTransformInfo &TTI,
+                               const SmallPtrSetImpl<const Value *> &EphValues,
+                               unsigned BEInsns);
 
   /// Whether it is legal to unroll this loop.
-  bool canUnroll() const;
+  LLVM_ABI bool canUnroll() const;
 
   uint64_t getRolledLoopSize() const { return LoopSize.getValue(); }
 
   /// Returns loop size estimation for unrolled loop, given the unrolling
   /// configuration specified by UP.
-  uint64_t
+  LLVM_ABI uint64_t
   getUnrolledLoopSize(const TargetTransformInfo::UnrollingPreferences &UP,
                       unsigned CountOverwrite = 0) const;
 };
 
-bool computeUnrollCount(Loop *L, const TargetTransformInfo &TTI,
-                        DominatorTree &DT, LoopInfo *LI, AssumptionCache *AC,
-                        ScalarEvolution &SE,
-                        const SmallPtrSetImpl<const Value *> &EphValues,
-                        OptimizationRemarkEmitter *ORE, unsigned TripCount,
-                        unsigned MaxTripCount, bool MaxOrZero,
-                        unsigned TripMultiple, const UnrollCostEstimator &UCE,
-                        TargetTransformInfo::UnrollingPreferences &UP,
-                        TargetTransformInfo::PeelingPreferences &PP,
-                        bool &UseUpperBound);
+LLVM_ABI bool computeUnrollCount(
+    Loop *L, const TargetTransformInfo &TTI, DominatorTree &DT, LoopInfo *LI,
+    AssumptionCache *AC, ScalarEvolution &SE,
+    const SmallPtrSetImpl<const Value *> &EphValues,
+    OptimizationRemarkEmitter *ORE, unsigned TripCount, unsigned MaxTripCount,
+    bool MaxOrZero, unsigned TripMultiple, const UnrollCostEstimator &UCE,
+    TargetTransformInfo::UnrollingPreferences &UP,
+    TargetTransformInfo::PeelingPreferences &PP, bool &UseUpperBound);
 
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Utils/ValueMapper.h b/llvm/include/llvm/Transforms/Utils/ValueMapper.h
index ac71996872277..17b5d4b891230 100644
--- a/llvm/include/llvm/Transforms/Utils/ValueMapper.h
+++ b/llvm/include/llvm/Transforms/Utils/ValueMapper.h
@@ -19,6 +19,7 @@
 #include "llvm/ADT/simple_ilist.h"
 #include "llvm/IR/ValueHandle.h"
 #include "llvm/IR/ValueMap.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 
@@ -41,7 +42,7 @@ using MetadataPredicate = std::function<bool(const Metadata *)>;
 
 /// This is a class that can be implemented by clients to remap types when
 /// cloning constants and instructions.
-class ValueMapTypeRemapper {
+class LLVM_ABI ValueMapTypeRemapper {
   virtual void anchor(); // Out of line method.
 
 public:
@@ -54,7 +55,7 @@ class ValueMapTypeRemapper {
 
 /// This is a class that can be implemented by clients to materialize Values on
 /// demand.
-class ValueMaterializer {
+class LLVM_ABI ValueMaterializer {
   virtual void anchor(); // Out of line method.
 
 protected:
@@ -163,21 +164,21 @@ class ValueMapper {
   void *pImpl;
 
 public:
-  ValueMapper(ValueToValueMapTy &VM, RemapFlags Flags = RF_None,
-              ValueMapTypeRemapper *TypeMapper = nullptr,
-              ValueMaterializer *Materializer = nullptr,
-              const MetadataPredicate *IdentityMD = nullptr);
+  LLVM_ABI ValueMapper(ValueToValueMapTy &VM, RemapFlags Flags = RF_None,
+                       ValueMapTypeRemapper *TypeMapper = nullptr,
+                       ValueMaterializer *Materializer = nullptr,
+                       const MetadataPredicate *IdentityMD = nullptr);
   ValueMapper(ValueMapper &&) = delete;
   ValueMapper(const ValueMapper &) = delete;
   ValueMapper &operator=(ValueMapper &&) = delete;
   ValueMapper &operator=(const ValueMapper &) = delete;
-  ~ValueMapper();
+  LLVM_ABI ~ValueMapper();
 
   /// Register an alternate mapping context.
   ///
   /// Returns a MappingContextID that can be used with the various schedule*()
   /// API to switch in a different value map on-the-fly.
-  unsigned
+  LLVM_ABI unsigned
   registerAlternateMappingContext(ValueToValueMapTy &VM,
                                   ValueMaterializer *Materializer = nullptr);
 
@@ -185,31 +186,34 @@ class ValueMapper {
   ///
   /// \note Like the top-level mapping functions, \a addFlags() must be called
   /// at the top level, not during a callback in a \a ValueMaterializer.
-  void addFlags(RemapFlags Flags);
-
-  Metadata *mapMetadata(const Metadata &MD);
-  MDNode *mapMDNode(const MDNode &N);
-
-  Value *mapValue(const Value &V);
-  Constant *mapConstant(const Constant &C);
-
-  void remapInstruction(Instruction &I);
-  void remapDbgRecord(Module *M, DbgRecord &V);
-  void remapDbgRecordRange(Module *M, iterator_range<DbgRecordIterator> Range);
-  void remapFunction(Function &F);
-  void remapGlobalObjectMetadata(GlobalObject &GO);
-
-  void scheduleMapGlobalInitializer(GlobalVariable &GV, Constant &Init,
-                                    unsigned MappingContextID = 0);
-  void scheduleMapAppendingVariable(GlobalVariable &GV, Constant *InitPrefix,
-                                    bool IsOldCtorDtor,
-                                    ArrayRef<Constant *> NewMembers,
-                                    unsigned MappingContextID = 0);
-  void scheduleMapGlobalAlias(GlobalAlias &GA, Constant &Aliasee,
-                              unsigned MappingContextID = 0);
-  void scheduleMapGlobalIFunc(GlobalIFunc &GI, Constant &Resolver,
-                              unsigned MappingContextID = 0);
-  void scheduleRemapFunction(Function &F, unsigned MappingContextID = 0);
+  LLVM_ABI void addFlags(RemapFlags Flags);
+
+  LLVM_ABI Metadata *mapMetadata(const Metadata &MD);
+  LLVM_ABI MDNode *mapMDNode(const MDNode &N);
+
+  LLVM_ABI Value *mapValue(const Value &V);
+  LLVM_ABI Constant *mapConstant(const Constant &C);
+
+  LLVM_ABI void remapInstruction(Instruction &I);
+  LLVM_ABI void remapDbgRecord(Module *M, DbgRecord &V);
+  LLVM_ABI void remapDbgRecordRange(Module *M,
+                                    iterator_range<DbgRecordIterator> Range);
+  LLVM_ABI void remapFunction(Function &F);
+  LLVM_ABI void remapGlobalObjectMetadata(GlobalObject &GO);
+
+  LLVM_ABI void scheduleMapGlobalInitializer(GlobalVariable &GV, Constant &Init,
+                                             unsigned MappingContextID = 0);
+  LLVM_ABI void scheduleMapAppendingVariable(GlobalVariable &GV,
+                                             Constant *InitPrefix,
+                                             bool IsOldCtorDtor,
+                                             ArrayRef<Constant *> NewMembers,
+                                             unsigned MappingContextID = 0);
+  LLVM_ABI void scheduleMapGlobalAlias(GlobalAlias &GA, Constant &Aliasee,
+                                       unsigned MappingContextID = 0);
+  LLVM_ABI void scheduleMapGlobalIFunc(GlobalIFunc &GI, Constant &Resolver,
+                                       unsigned MappingContextID = 0);
+  LLVM_ABI void scheduleRemapFunction(Function &F,
+                                      unsigned MappingContextID = 0);
 };
 
 /// Look up or compute a value in the value map.
@@ -295,7 +299,7 @@ inline void RemapInstruction(Instruction *I, ValueToValueMapTy &VM,
 /// instruction's atom group number if it has been mapped (e.g. with
 /// llvm::mapAtomInstance), which is necessary to distinguish source code
 /// atoms on duplicated code paths.
-void RemapSourceAtom(Instruction *I, ValueToValueMapTy &VM);
+LLVM_ABI void RemapSourceAtom(Instruction *I, ValueToValueMapTy &VM);
 
 /// Remap the Values used in the DbgRecord \a DR using the value map \a
 /// VM.
diff --git a/llvm/include/llvm/Transforms/Vectorize/LoadStoreVectorizer.h b/llvm/include/llvm/Transforms/Vectorize/LoadStoreVectorizer.h
index 15a46baa190d8..d8f52b3707d4b 100644
--- a/llvm/include/llvm/Transforms/Vectorize/LoadStoreVectorizer.h
+++ b/llvm/include/llvm/Transforms/Vectorize/LoadStoreVectorizer.h
@@ -10,6 +10,7 @@
 #define LLVM_TRANSFORMS_VECTORIZE_LOADSTOREVECTORIZER_H
 
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 class Pass;
@@ -17,12 +18,11 @@ class Function;
 
 class LoadStoreVectorizerPass : public PassInfoMixin<LoadStoreVectorizerPass> {
 public:
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 /// Create a legacy pass manager instance of the LoadStoreVectorizer pass
-Pass *createLoadStoreVectorizerPass();
-
+LLVM_ABI Pass *createLoadStoreVectorizerPass();
 }
 
 #endif /* LLVM_TRANSFORMS_VECTORIZE_LOADSTOREVECTORIZER_H */
diff --git a/llvm/include/llvm/Transforms/Vectorize/LoopVectorize.h b/llvm/include/llvm/Transforms/Vectorize/LoopVectorize.h
index b4e5735eb1439..db1971aca4bff 100644
--- a/llvm/include/llvm/Transforms/Vectorize/LoopVectorize.h
+++ b/llvm/include/llvm/Transforms/Vectorize/LoopVectorize.h
@@ -58,6 +58,7 @@
 
 #include "llvm/IR/PassManager.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Utils/ExtraPassManager.h"
 #include <functional>
 
@@ -78,8 +79,8 @@ class ScalarEvolution;
 class TargetLibraryInfo;
 class TargetTransformInfo;
 
-extern cl::opt<bool> EnableLoopInterleaving;
-extern cl::opt<bool> EnableLoopVectorization;
+LLVM_ABI extern cl::opt<bool> EnableLoopInterleaving;
+LLVM_ABI extern cl::opt<bool> EnableLoopVectorization;
 
 struct LoopVectorizeOptions {
   /// If false, consider all loops for interleaving.
@@ -138,7 +139,7 @@ struct LoopVectorizePass : public PassInfoMixin<LoopVectorizePass> {
   bool VectorizeOnlyWhenForced;
 
 public:
-  LoopVectorizePass(LoopVectorizeOptions Opts = {});
+  LLVM_ABI LoopVectorizePass(LoopVectorizeOptions Opts = {});
 
   ScalarEvolution *SE;
   LoopInfo *LI;
@@ -152,22 +153,23 @@ struct LoopVectorizePass : public PassInfoMixin<LoopVectorizePass> {
   OptimizationRemarkEmitter *ORE;
   ProfileSummaryInfo *PSI;
 
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
-  void printPipeline(raw_ostream &OS,
-                     function_ref<StringRef(StringRef)> MapClassName2PassName);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI void
+  printPipeline(raw_ostream &OS,
+                function_ref<StringRef(StringRef)> MapClassName2PassName);
 
   // Shim for old PM.
-  LoopVectorizeResult runImpl(Function &F);
+  LLVM_ABI LoopVectorizeResult runImpl(Function &F);
 
-  bool processLoop(Loop *L);
+  LLVM_ABI bool processLoop(Loop *L);
 };
 
 /// Reports a vectorization failure: print \p DebugMsg for debugging
 /// purposes along with the corresponding optimization remark \p RemarkName.
 /// If \p I is passed, it is an instruction that prevents vectorization.
 /// Otherwise, the loop \p TheLoop is used for the location of the remark.
-void reportVectorizationFailure(const StringRef DebugMsg,
-    const StringRef OREMsg, const StringRef ORETag,
+LLVM_ABI void reportVectorizationFailure(
+    const StringRef DebugMsg, const StringRef OREMsg, const StringRef ORETag,
     OptimizationRemarkEmitter *ORE, Loop *TheLoop, Instruction *I = nullptr);
 
 /// Same as above, but the debug message and optimization remark are identical
@@ -184,7 +186,7 @@ inline void reportVectorizationFailure(const StringRef DebugMsg,
 struct ShouldRunExtraVectorPasses
     : public ShouldRunExtraPasses<ShouldRunExtraVectorPasses>,
       public AnalysisInfoMixin<ShouldRunExtraVectorPasses> {
-  static AnalysisKey Key;
+  LLVM_ABI static AnalysisKey Key;
 };
 } // end namespace llvm
 
diff --git a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.h b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.h
index aff2068b28331..7d02d9a683100 100644
--- a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.h
+++ b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.h
@@ -27,6 +27,7 @@
 #include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/SandboxIR/Instruction.h"
 #include "llvm/SandboxIR/IntrinsicInst.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Vectorize/SandboxVectorizer/Interval.h"
 
 namespace llvm::sandboxir {
@@ -45,6 +46,9 @@ class DGNode;
 class MemDGNode;
 class DependencyGraph;
 
+// Defined in Transforms/Vectorize/SandboxVectorizer/Interval.cpp
+extern template class LLVM_TEMPLATE_ABI Interval<MemDGNode>;
+
 /// Iterate over both def-use and mem dependencies.
 class PredIterator {
   User::op_iterator OpIt;
@@ -65,9 +69,9 @@ class PredIterator {
 
   /// Skip iterators that don't point instructions or are outside \p DAG,
   /// starting from \p OpIt and ending before \p OpItE.n
-  static User::op_iterator skipBadIt(User::op_iterator OpIt,
-                                     User::op_iterator OpItE,
-                                     const DependencyGraph &DAG);
+  LLVM_ABI static User::op_iterator skipBadIt(User::op_iterator OpIt,
+                                              User::op_iterator OpItE,
+                                              const DependencyGraph &DAG);
 
 public:
   using difference_type = std::ptrdiff_t;
@@ -75,20 +79,20 @@ class PredIterator {
   using pointer = value_type *;
   using reference = value_type &;
   using iterator_category = std::input_iterator_tag;
-  value_type operator*();
-  PredIterator &operator++();
+  LLVM_ABI value_type operator*();
+  LLVM_ABI PredIterator &operator++();
   PredIterator operator++(int) {
     auto Copy = *this;
     ++(*this);
     return Copy;
   }
-  bool operator==(const PredIterator &Other) const;
+  LLVM_ABI bool operator==(const PredIterator &Other) const;
   bool operator!=(const PredIterator &Other) const { return !(*this == Other); }
 };
 
 /// A DependencyGraph Node that points to an Instruction and contains memory
 /// dependency edges.
-class DGNode {
+class LLVM_ABI DGNode {
 protected:
   Instruction *I;
   // TODO: Use a PointerIntPair for SubclassID and I.
@@ -310,17 +314,17 @@ class MemDGNodeIntervalBuilder {
 public:
   /// Scans the instruction chain in \p Intvl top-down, returning the top-most
   /// MemDGNode, or nullptr.
-  static MemDGNode *getTopMemDGNode(const Interval<Instruction> &Intvl,
-                                    const DependencyGraph &DAG);
+  LLVM_ABI static MemDGNode *getTopMemDGNode(const Interval<Instruction> &Intvl,
+                                             const DependencyGraph &DAG);
   /// Scans the instruction chain in \p Intvl bottom-up, returning the
   /// bottom-most MemDGNode, or nullptr.
-  static MemDGNode *getBotMemDGNode(const Interval<Instruction> &Intvl,
-                                    const DependencyGraph &DAG);
+  LLVM_ABI static MemDGNode *getBotMemDGNode(const Interval<Instruction> &Intvl,
+                                             const DependencyGraph &DAG);
   /// Given \p Instrs it finds their closest mem nodes in the interval and
   /// returns the corresponding mem range. Note: BotN (or its neighboring mem
   /// node) is included in the range.
-  static Interval<MemDGNode> make(const Interval<Instruction> &Instrs,
-                                  DependencyGraph &DAG);
+  LLVM_ABI static Interval<MemDGNode> make(const Interval<Instruction> &Instrs,
+                                           DependencyGraph &DAG);
   static Interval<MemDGNode> makeEmpty() { return {}; }
 };
 
@@ -383,15 +387,15 @@ class DependencyGraph {
                                MemDGNode *SkipN = nullptr) const;
 
   /// Called by the callbacks when a new instruction \p I has been created.
-  void notifyCreateInstr(Instruction *I);
+  LLVM_ABI void notifyCreateInstr(Instruction *I);
   /// Called by the callbacks when instruction \p I is about to get
   /// deleted.
-  void notifyEraseInstr(Instruction *I);
+  LLVM_ABI void notifyEraseInstr(Instruction *I);
   /// Called by the callbacks when instruction \p I is about to be moved to
   /// \p To.
-  void notifyMoveInstr(Instruction *I, const BBIterator &To);
+  LLVM_ABI void notifyMoveInstr(Instruction *I, const BBIterator &To);
   /// Called by the callbacks when \p U's source is about to be set to \p NewSrc
-  void notifySetUse(const Use &U, Value *NewSrc);
+  LLVM_ABI void notifySetUse(const Use &U, Value *NewSrc);
 
 public:
   /// This constructor also registers callbacks.
@@ -441,7 +445,7 @@ class DependencyGraph {
   }
   /// Build/extend the dependency graph such that it includes \p Instrs. Returns
   /// the range of instructions added to the DAG.
-  Interval<Instruction> extend(ArrayRef<Instruction *> Instrs);
+  LLVM_ABI Interval<Instruction> extend(ArrayRef<Instruction *> Instrs);
   /// \Returns the range of instructions included in the DAG.
   Interval<Instruction> getInterval() const { return DAGInterval; }
   void clear() {
@@ -460,7 +464,6 @@ class DependencyGraph {
   LLVM_DUMP_METHOD void dump() const;
 #endif // NDEBUG
 };
-
 } // namespace llvm::sandboxir
 
 #endif // LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_DEPENDENCYGRAPH_H
diff --git a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Interval.h b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Interval.h
index f6c5a20467337..2524ed6d98e74 100644
--- a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Interval.h
+++ b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Interval.h
@@ -22,6 +22,7 @@
 
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/SandboxIR/Instruction.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/raw_ostream.h"
 #include <iterator>
 #include <type_traits>
@@ -235,6 +236,9 @@ template <typename T> class Interval {
 #endif
 };
 
+// Defined in Transforms/Vectorize/SandboxVectorizer/Interval.cpp
+extern template class LLVM_TEMPLATE_ABI Interval<Instruction>;
+
 } // namespace llvm::sandboxir
 
 #endif // LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_INSTRINTERVAL_H
diff --git a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Legality.h b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Legality.h
index f74dcecb7e3e6..96a2348403932 100644
--- a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Legality.h
+++ b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Legality.h
@@ -16,6 +16,7 @@
 #include "llvm/Analysis/ScalarEvolution.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/Support/Casting.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Transforms/Vectorize/SandboxVectorizer/InstrMaps.h"
 #include "llvm/Transforms/Vectorize/SandboxVectorizer/Scheduler.h"
@@ -347,13 +348,13 @@ class LegalityAnalysis {
   /// \Returns a LegalityResult object owned by LegalityAnalysis.
   /// \p SkipScheduling skips the scheduler check and is only meant for testing.
   // TODO: Try to remove the SkipScheduling argument by refactoring the tests.
-  const LegalityResult &canVectorize(ArrayRef<Value *> Bndl,
-                                     bool SkipScheduling = false);
+  LLVM_ABI const LegalityResult &canVectorize(ArrayRef<Value *> Bndl,
+                                              bool SkipScheduling = false);
   /// \Returns a Pack with reason 'ForcePackForDebugging'.
   const LegalityResult &getForcedPackForDebugging() {
     return createLegalityResult<Pack>(ResultReason::ForcePackForDebugging);
   }
-  void clear();
+  LLVM_ABI void clear();
 };
 
 } // namespace llvm::sandboxir
diff --git a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SandboxVectorizer.h b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SandboxVectorizer.h
index fea53329719b9..fc8765217c0c2 100644
--- a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SandboxVectorizer.h
+++ b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SandboxVectorizer.h
@@ -8,6 +8,7 @@
 #ifndef LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_SANDBOXVECTORIZER_H
 #define LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_SANDBOXVECTORIZER_H
 
+#include "llvm/Support/Compiler.h"
 #include <memory>
 
 #include "llvm/Analysis/AliasAnalysis.h"
@@ -49,11 +50,11 @@ class SandboxVectorizerPass : public PassInfoMixin<SandboxVectorizerPass> {
   // Vectorizer component can't find the vtable for classes like
   // sandboxir::Pass. This way we don't have to make LLVMPasses add a direct
   // dependency on SandboxIR.
-  SandboxVectorizerPass();
-  SandboxVectorizerPass(SandboxVectorizerPass &&);
-  ~SandboxVectorizerPass();
+  LLVM_ABI SandboxVectorizerPass();
+  LLVM_ABI SandboxVectorizerPass(SandboxVectorizerPass &&);
+  LLVM_ABI ~SandboxVectorizerPass();
 
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+  LLVM_ABI PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 };
 
 } // namespace llvm
diff --git a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Scheduler.h b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Scheduler.h
index 681cf881bce0f..66ba91c58430d 100644
--- a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Scheduler.h
+++ b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Scheduler.h
@@ -22,6 +22,7 @@
 #define LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_SCHEDULER_H
 
 #include "llvm/SandboxIR/Instruction.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.h"
 #include <queue>
 
@@ -143,11 +144,11 @@ class SchedBundle {
   const_iterator begin() const { return Nodes.begin(); }
   const_iterator end() const { return Nodes.end(); }
   /// \Returns the bundle node that comes before the others in program order.
-  DGNode *getTop() const;
+  LLVM_ABI DGNode *getTop() const;
   /// \Returns the bundle node that comes after the others in program order.
-  DGNode *getBot() const;
+  LLVM_ABI DGNode *getBot() const;
   /// Move all bundle instructions to \p Where back-to-back.
-  void cluster(BasicBlock::iterator Where);
+  LLVM_ABI void cluster(BasicBlock::iterator Where);
   /// \Returns true if all nodes in the bundle are ready.
   bool ready() const {
     return all_of(Nodes, [](const auto *N) { return N->ready(); });
@@ -182,7 +183,7 @@ class Scheduler {
   /// Called by Sandbox IR's callback system, after \p I has been created.
   /// NOTE: This should run after DAG's callback has run.
   // TODO: Perhaps call DAG's notify function from within this one?
-  void notifyCreateInstr(Instruction *I);
+  LLVM_ABI void notifyCreateInstr(Instruction *I);
 
   /// \Returns a scheduling bundle containing \p Instrs.
   SchedBundle *createBundle(ArrayRef<Instruction *> Instrs);
@@ -206,7 +207,8 @@ class Scheduler {
                     /// were in the same SchedBundle.
   };
   /// \Returns whether none/some/all of \p Instrs have been scheduled.
-  BndlSchedState getBndlSchedState(ArrayRef<Instruction *> Instrs) const;
+  LLVM_ABI BndlSchedState
+  getBndlSchedState(ArrayRef<Instruction *> Instrs) const;
   /// Destroy the top-most part of the schedule that includes \p Instrs.
   void trimSchedule(ArrayRef<Instruction *> Instrs);
   /// Disable copies.
@@ -229,7 +231,7 @@ class Scheduler {
   /// dependencies among \p Instrs. This function may involve scheduling
   /// intermediate instructions or canceling and re-scheduling if needed.
   /// \Returns true on success, false otherwise.
-  bool trySchedule(ArrayRef<Instruction *> Instrs);
+  LLVM_ABI bool trySchedule(ArrayRef<Instruction *> Instrs);
   /// Clear the scheduler's state, including the DAG.
   void clear() {
     Bndls.clear();
diff --git a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SeedCollector.h b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SeedCollector.h
index 9c1374719298b..d4cb34647cf55 100644
--- a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SeedCollector.h
+++ b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SeedCollector.h
@@ -18,6 +18,7 @@
 #include "llvm/SandboxIR/Instruction.h"
 #include "llvm/SandboxIR/Utils.h"
 #include "llvm/SandboxIR/Value.h"
+#include "llvm/Support/Compiler.h"
 #include <iterator>
 #include <memory>
 
@@ -95,8 +96,8 @@ class SeedBundle {
   /// with a total size <= \p MaxVecRegBits, or an empty slice if the
   /// requirements cannot be met . If \p ForcePowOf2 is true, then the returned
   /// slice will have a total number of bits that is a power of 2.
-  ArrayRef<Instruction *> getSlice(unsigned StartIdx, unsigned MaxVecRegBits,
-                                   bool ForcePowOf2);
+  LLVM_ABI ArrayRef<Instruction *>
+  getSlice(unsigned StartIdx, unsigned MaxVecRegBits, bool ForcePowOf2);
 
   /// \Returns the number of seed elements in the bundle.
   std::size_t size() const { return Seeds.size(); }
@@ -269,7 +270,7 @@ class SeedContainer {
   template <typename LoadOrStoreT> void insert(LoadOrStoreT *LSI);
   // To support constant-time erase, these just mark the element used, rather
   // than actually removing them from the bundle.
-  bool erase(Instruction *I);
+  LLVM_ABI bool erase(Instruction *I);
   bool erase(const KeyT &Key) { return Bundles.erase(Key); }
   iterator begin() {
     if (Bundles.empty())
@@ -288,6 +289,12 @@ class SeedContainer {
 #endif // NDEBUG
 };
 
+// Explicit instantiations
+extern template LLVM_TEMPLATE_ABI void
+SeedContainer::insert<LoadInst>(LoadInst *);
+extern template LLVM_TEMPLATE_ABI void
+SeedContainer::insert<StoreInst>(StoreInst *);
+
 class SeedCollector {
   SeedContainer StoreSeeds;
   SeedContainer LoadSeeds;
@@ -300,8 +307,8 @@ class SeedCollector {
   }
 
 public:
-  SeedCollector(BasicBlock *BB, ScalarEvolution &SE);
-  ~SeedCollector();
+  LLVM_ABI SeedCollector(BasicBlock *BB, ScalarEvolution &SE);
+  LLVM_ABI ~SeedCollector();
 
   iterator_range<SeedContainer::iterator> getStoreSeeds() {
     return {StoreSeeds.begin(), StoreSeeds.end()};
diff --git a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/VecUtils.h b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/VecUtils.h
index 7765a4ab2ba98..d32bfbaf7a4c8 100644
--- a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/VecUtils.h
+++ b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/VecUtils.h
@@ -16,6 +16,7 @@
 #include "llvm/IR/DataLayout.h"
 #include "llvm/SandboxIR/Type.h"
 #include "llvm/SandboxIR/Utils.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
 /// Traits for DenseMap.
@@ -195,7 +196,7 @@ class VecUtils {
     return ScalarTy;
   }
   /// \Returns the first integer power of 2 that is <= Num.
-  static unsigned getFloorPowerOf2(unsigned Num);
+  LLVM_ABI static unsigned getFloorPowerOf2(unsigned Num);
 
   /// Helper struct for `matchPack()`. Describes the instructions and operands
   /// of a pack pattern.
diff --git a/llvm/lib/Transforms/Coroutines/CoroFrame.cpp b/llvm/lib/Transforms/Coroutines/CoroFrame.cpp
index eb528018aa386..1acd9139fe26e 100644
--- a/llvm/lib/Transforms/Coroutines/CoroFrame.cpp
+++ b/llvm/lib/Transforms/Coroutines/CoroFrame.cpp
@@ -26,6 +26,7 @@
 #include "llvm/IR/InstIterator.h"
 #include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/Module.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/OptimizedStructLayout.h"
 #include "llvm/Transforms/Coroutines/ABI.h"
diff --git a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
index 034678527950d..fe3b0da33a009 100644
--- a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
@@ -47,6 +47,7 @@
 #include "llvm/ProfileData/InstrProfCorrelator.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Error.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/TargetParser/Triple.h"
@@ -76,7 +77,7 @@ cl::opt<bool> DebugInfoCorrelate(
              "-profile-correlate=debug-info)"),
     cl::init(false));
 
-cl::opt<InstrProfCorrelator::ProfCorrelatorKind> ProfileCorrelate(
+LLVM_ABI cl::opt<InstrProfCorrelator::ProfCorrelatorKind> ProfileCorrelate(
     "profile-correlate",
     cl::desc("Use debug info or binary file to correlate profiles."),
     cl::init(InstrProfCorrelator::NONE),
diff --git a/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp b/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
index 3347f3d376c94..9c92a7feb6e61 100644
--- a/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
+++ b/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
@@ -100,6 +100,7 @@
 #include "llvm/Support/CRC.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/DOTGraphTraits.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Error.h"
@@ -359,7 +360,8 @@ extern cl::opt<std::string> ViewBlockFreqFuncName;
 // ProfileData/InstrProf.cpp: -enable-vtable-value-profiling=
 extern cl::opt<bool> EnableVTableValueProfiling;
 extern cl::opt<bool> EnableVTableProfileUse;
-extern cl::opt<InstrProfCorrelator::ProfCorrelatorKind> ProfileCorrelate;
+LLVM_ABI extern cl::opt<InstrProfCorrelator::ProfCorrelatorKind>
+    ProfileCorrelate;
 } // namespace llvm
 
 namespace {
diff --git a/llvm/lib/Transforms/Utils/AssumeBundleBuilder.cpp b/llvm/lib/Transforms/Utils/AssumeBundleBuilder.cpp
index 7210fee9c7b7c..4aebeeda7f262 100644
--- a/llvm/lib/Transforms/Utils/AssumeBundleBuilder.cpp
+++ b/llvm/lib/Transforms/Utils/AssumeBundleBuilder.cpp
@@ -20,13 +20,14 @@
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Operator.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/DebugCounter.h"
 #include "llvm/Transforms/Utils/Local.h"
 
 using namespace llvm;
 
 namespace llvm {
-cl::opt<bool> ShouldPreserveAllAttributes(
+LLVM_ABI cl::opt<bool> ShouldPreserveAllAttributes(
     "assume-preserve-all", cl::init(false), cl::Hidden,
     cl::desc("enable preservation of all attributes. even those that are "
              "unlikely to be useful"));
diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index c8ad01a592ff6..c67c575efe3a7 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -71,6 +71,7 @@
 #include "llvm/IR/ValueHandle.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/KnownBits.h"
diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
index 3621989424e83..0681ebc111cb2 100644
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -41,6 +41,7 @@
 #include "llvm/IR/ValueHandle.h"
 #include "llvm/InitializePasses.h"
 #include "llvm/Pass.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Transforms/Utils/BasicBlockUtils.h"
 #include "llvm/Transforms/Utils/Local.h"
@@ -1820,10 +1821,11 @@ void llvm::appendLoopsToWorklist(RangeT &&Loops,
   appendReversedLoopsToWorklist(reverse(Loops), Worklist);
 }
 
-template void llvm::appendLoopsToWorklist<ArrayRef<Loop *> &>(
+template LLVM_EXPORT_TEMPLATE void
+llvm::appendLoopsToWorklist<ArrayRef<Loop *> &>(
     ArrayRef<Loop *> &Loops, SmallPriorityWorklist<Loop *, 4> &Worklist);
 
-template void
+template LLVM_EXPORT_TEMPLATE void
 llvm::appendLoopsToWorklist<Loop &>(Loop &L,
                                     SmallPriorityWorklist<Loop *, 4> &Worklist);
 
diff --git a/llvm/lib/Transforms/Vectorize/SandboxVectorizer/Interval.cpp b/llvm/lib/Transforms/Vectorize/SandboxVectorizer/Interval.cpp
index b2bfbf5c2e8b9..e651e92f8b272 100644
--- a/llvm/lib/Transforms/Vectorize/SandboxVectorizer/Interval.cpp
+++ b/llvm/lib/Transforms/Vectorize/SandboxVectorizer/Interval.cpp
@@ -8,6 +8,7 @@
 
 #include "llvm/Transforms/Vectorize/SandboxVectorizer/Interval.h"
 #include "llvm/SandboxIR/Instruction.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.h"
 
@@ -42,7 +43,7 @@ template <typename T> void Interval<T>::print(raw_ostream &OS) const {
 template <typename T> void Interval<T>::dump() const { print(dbgs()); }
 #endif
 
-template class Interval<Instruction>;
-template class Interval<MemDGNode>;
+template class LLVM_EXPORT_TEMPLATE Interval<Instruction>;
+template class LLVM_EXPORT_TEMPLATE Interval<MemDGNode>;
 
 } // namespace llvm::sandboxir
diff --git a/llvm/lib/Transforms/Vectorize/SandboxVectorizer/SeedCollector.cpp b/llvm/lib/Transforms/Vectorize/SandboxVectorizer/SeedCollector.cpp
index ee7063437a8fc..008976ac9749d 100644
--- a/llvm/lib/Transforms/Vectorize/SandboxVectorizer/SeedCollector.cpp
+++ b/llvm/lib/Transforms/Vectorize/SandboxVectorizer/SeedCollector.cpp
@@ -12,6 +12,7 @@
 #include "llvm/IR/Type.h"
 #include "llvm/SandboxIR/Instruction.h"
 #include "llvm/SandboxIR/Utils.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/Debug.h"
 
 using namespace llvm;
@@ -119,8 +120,9 @@ template <typename LoadOrStoreT> void SeedContainer::insert(LoadOrStoreT *LSI) {
 }
 
 // Explicit instantiations
-template void SeedContainer::insert<LoadInst>(LoadInst *);
-template void SeedContainer::insert<StoreInst>(StoreInst *);
+template LLVM_EXPORT_TEMPLATE void SeedContainer::insert<LoadInst>(LoadInst *);
+template LLVM_EXPORT_TEMPLATE void
+SeedContainer::insert<StoreInst>(StoreInst *);
 
 #ifndef NDEBUG
 void SeedContainer::print(raw_ostream &OS) const {