[DataLayout] Remove constructor accepting a pointer to Module (#102841)

The constructor initializes `*this` with `M->getDataLayout()`, which
is effectively the same as calling the copy constructor.
There does not seem to be a case where a copy would be necessary.

Pull Request: #102841

Author: s-barannikov

clang/lib/CodeGen/CGObjCGNU.cpp

@@ -278,9 +278,9 @@ class CGObjCGNU : public CGObjCRuntime {
       Fields.addInt(IntTy, count);
       // int size; (only in GNUstep v2 ABI.
       if (isRuntime(ObjCRuntime::GNUstep, 2)) {
-        llvm::DataLayout td(&TheModule);
-        Fields.addInt(IntTy, td.getTypeSizeInBits(PropertyMetadataTy) /
-            CGM.getContext().getCharWidth());
+        const llvm::DataLayout &DL = TheModule.getDataLayout();
+        Fields.addInt(IntTy, DL.getTypeSizeInBits(PropertyMetadataTy) /
+                                 CGM.getContext().getCharWidth());
       }
       // struct objc_property_list *next;
       Fields.add(NULLPtr);
@@ -1190,9 +1190,9 @@ class CGObjCGNUstep2 : public CGObjCGNUstep {
     // int count;
     MethodList.addInt(IntTy, Methods.size());
     // int size; // sizeof(struct objc_method_description)
-    llvm::DataLayout td(&TheModule);
-    MethodList.addInt(IntTy, td.getTypeSizeInBits(ObjCMethodDescTy) /
-        CGM.getContext().getCharWidth());
+    const llvm::DataLayout &DL = TheModule.getDataLayout();
+    MethodList.addInt(IntTy, DL.getTypeSizeInBits(ObjCMethodDescTy) /
+                                 CGM.getContext().getCharWidth());
     // struct objc_method_description[]
     auto MethodArray = MethodList.beginArray(ObjCMethodDescTy);
     for (auto *M : Methods) {
@@ -1828,7 +1828,7 @@ class CGObjCGNUstep2 : public CGObjCGNUstep {
       int ivar_count = 0;
       for (const ObjCIvarDecl *IVD = classDecl->all_declared_ivar_begin(); IVD;
            IVD = IVD->getNextIvar()) ivar_count++;
-      llvm::DataLayout td(&TheModule);
+      const llvm::DataLayout &DL = TheModule.getDataLayout();
       // struct objc_ivar_list *ivars;
       ConstantInitBuilder b(CGM);
       auto ivarListBuilder = b.beginStruct();
@@ -1841,8 +1841,8 @@ class CGObjCGNUstep2 : public CGObjCGNUstep {
         PtrToInt8Ty,
         Int32Ty,
         Int32Ty);
-      ivarListBuilder.addInt(SizeTy, td.getTypeSizeInBits(ObjCIvarTy) /
-          CGM.getContext().getCharWidth());
+      ivarListBuilder.addInt(SizeTy, DL.getTypeSizeInBits(ObjCIvarTy) /
+                                         CGM.getContext().getCharWidth());
       // struct objc_ivar ivars[]
       auto ivarArrayBuilder = ivarListBuilder.beginArray();
       for (const ObjCIvarDecl *IVD = classDecl->all_declared_ivar_begin(); IVD;
@@ -3019,9 +3019,9 @@ GenerateMethodList(StringRef ClassName,
   bool isV2ABI = isRuntime(ObjCRuntime::GNUstep, 2);
   if (isV2ABI) {
     // size_t size;
-    llvm::DataLayout td(&TheModule);
-    MethodList.addInt(SizeTy, td.getTypeSizeInBits(ObjCMethodTy) /
-        CGM.getContext().getCharWidth());
+    const llvm::DataLayout &DL = TheModule.getDataLayout();
+    MethodList.addInt(SizeTy, DL.getTypeSizeInBits(ObjCMethodTy) /
+                                  CGM.getContext().getCharWidth());
     ObjCMethodTy =
       llvm::StructType::get(CGM.getLLVMContext(), {
         IMPTy,       // Method pointer
@@ -3161,10 +3161,9 @@ llvm::Constant *CGObjCGNU::GenerateClassStructure(
   Elements.addInt(LongTy, info);
   // instance_size
   if (isMeta) {
-    llvm::DataLayout td(&TheModule);
-    Elements.addInt(LongTy,
-                    td.getTypeSizeInBits(ClassTy) /
-                      CGM.getContext().getCharWidth());
+    const llvm::DataLayout &DL = TheModule.getDataLayout();
+    Elements.addInt(LongTy, DL.getTypeSizeInBits(ClassTy) /
+                                CGM.getContext().getCharWidth());
   } else
     Elements.add(InstanceSize);
   // ivars

clang/lib/CodeGen/CodeGenTBAA.cpp

@@ -318,7 +318,7 @@ TBAAAccessInfo CodeGenTBAA::getAccessInfo(QualType AccessType) {
 }
 
 TBAAAccessInfo CodeGenTBAA::getVTablePtrAccessInfo(llvm::Type *VTablePtrType) {
-  llvm::DataLayout DL(&Module);
+  const llvm::DataLayout &DL = Module.getDataLayout();
   unsigned Size = DL.getPointerTypeSize(VTablePtrType);
   return TBAAAccessInfo(createScalarTypeNode("vtable pointer", getRoot(), Size),
                         Size);

llvm/include/llvm/IR/DataLayout.h

@@ -45,7 +45,6 @@ namespace llvm {
 
 class GlobalVariable;
 class LLVMContext;
-class Module;
 class StructLayout;
 class Triple;
 class Value;
@@ -195,9 +194,6 @@ class DataLayout {
     reset(LayoutDescription);
   }
 
-  /// Initialize target data from properties stored in the module.
-  explicit DataLayout(const Module *M);
-
   DataLayout(const DataLayout &DL) { *this = DL; }
 
   ~DataLayout(); // Not virtual, do not subclass this class
@@ -207,8 +203,6 @@ class DataLayout {
   bool operator==(const DataLayout &Other) const;
   bool operator!=(const DataLayout &Other) const { return !(*this == Other); }
 
-  void init(const Module *M);
-
   /// Parse a data layout string (with fallback to default values).
   void reset(StringRef LayoutDescription);
 

llvm/lib/Analysis/InlineCost.cpp

@@ -3246,8 +3246,7 @@ InlineCostAnnotationPrinterPass::run(Function &F,
   };
   Module *M = F.getParent();
   ProfileSummaryInfo PSI(*M);
-  DataLayout DL(M);
-  TargetTransformInfo TTI(DL);
+  TargetTransformInfo TTI(M->getDataLayout());
   // FIXME: Redesign the usage of InlineParams to expand the scope of this pass.
   // In the current implementation, the type of InlineParams doesn't matter as
   // the pass serves only for verification of inliner's decisions.

llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp

@@ -2826,13 +2826,12 @@ bool AssignmentTrackingAnalysis::runOnFunction(Function &F) {
 
   LLVM_DEBUG(dbgs() << "AssignmentTrackingAnalysis run on " << F.getName()
                     << "\n");
-  auto DL = std::make_unique<DataLayout>(F.getParent());
 
   // Clear previous results.
   Results->clear();
 
   FunctionVarLocsBuilder Builder;
-  analyzeFunction(F, *DL.get(), &Builder);
+  analyzeFunction(F, F.getDataLayout(), &Builder);
 
   // Save these results.
   Results->init(Builder);

llvm/lib/FuzzMutate/RandomIRBuilder.cpp

@@ -67,7 +67,7 @@ AllocaInst *RandomIRBuilder::createStackMemory(Function *F, Type *Ty,
                                                Value *Init) {
   /// TODO: For all Allocas, maybe allocate an array.
   BasicBlock *EntryBB = &F->getEntryBlock();
-  DataLayout DL(F->getParent());
+  const DataLayout &DL = F->getDataLayout();
   AllocaInst *Alloca = new AllocaInst(Ty, DL.getAllocaAddrSpace(), "A",
                                       EntryBB->getFirstInsertionPt());
   if (Init)
@@ -423,7 +423,7 @@ Function *RandomIRBuilder::createFunctionDefinition(Module &M,
   // TODO: Some arguments and a return value would probably be more
   // interesting.
   LLVMContext &Context = M.getContext();
-  DataLayout DL(&M);
+  const DataLayout &DL = M.getDataLayout();
   BasicBlock *BB = BasicBlock::Create(Context, "BB", F);
   Type *RetTy = F->getReturnType();
   if (RetTy != Type::getVoidTy(Context)) {

llvm/lib/IR/DataLayout.cpp

@@ -22,7 +22,6 @@
 #include "llvm/IR/DerivedTypes.h"
 #include "llvm/IR/GetElementPtrTypeIterator.h"
 #include "llvm/IR/GlobalVariable.h"
-#include "llvm/IR/Module.h"
 #include "llvm/IR/Type.h"
 #include "llvm/IR/Value.h"
 #include "llvm/Support/Casting.h"
@@ -589,12 +588,6 @@ Error DataLayout::parseSpecifier(StringRef Desc) {
   return Error::success();
 }
 
-DataLayout::DataLayout(const Module *M) {
-  init(M);
-}
-
-void DataLayout::init(const Module *M) { *this = M->getDataLayout(); }
-
 static SmallVectorImpl<LayoutAlignElem>::const_iterator
 findAlignmentLowerBound(const SmallVectorImpl<LayoutAlignElem> &Alignments,
                         uint32_t BitWidth) {

llvm/lib/Target/NVPTX/NVPTXLowerArgs.cpp

@@ -328,7 +328,7 @@ static void adjustByValArgAlignment(Argument *Arg, Value *ArgInParamAS,
                                     const NVPTXTargetLowering *TLI) {
   Function *Func = Arg->getParent();
   Type *StructType = Arg->getParamByValType();
-  const DataLayout DL(Func->getParent());
+  const DataLayout &DL = Func->getDataLayout();
 
   uint64_t NewArgAlign =
       TLI->getFunctionParamOptimizedAlign(Func, StructType, DL).value();

llvm/lib/Transforms/Utils/InlineFunction.cpp

@@ -1896,8 +1896,8 @@ static void trackInlinedStores(Function::iterator Start, Function::iterator End,
   LLVM_DEBUG(errs() << "trackInlinedStores into "
                     << Start->getParent()->getName() << " from "
                     << CB.getCalledFunction()->getName() << "\n");
-  std::unique_ptr<DataLayout> DL = std::make_unique<DataLayout>(CB.getModule());
-  at::trackAssignments(Start, End, collectEscapedLocals(*DL, CB), *DL);
+  const DataLayout &DL = CB.getDataLayout();
+  at::trackAssignments(Start, End, collectEscapedLocals(DL, CB), DL);
 }
 
 /// Update inlined instructions' DIAssignID metadata. We need to do this

llvm/unittests/IR/IRBuilderTest.cpp

@@ -521,11 +521,10 @@ TEST_F(IRBuilderTest, GetIntTy) {
   IntegerType *Ty1 = Builder.getInt1Ty();
   EXPECT_EQ(Ty1, IntegerType::get(Ctx, 1));
 
-  DataLayout* DL = new DataLayout(M.get());
-  IntegerType *IntPtrTy = Builder.getIntPtrTy(*DL);
-  unsigned IntPtrBitSize =  DL->getPointerSizeInBits(0);
+  const DataLayout &DL = M->getDataLayout();
+  IntegerType *IntPtrTy = Builder.getIntPtrTy(DL);
+  unsigned IntPtrBitSize = DL.getPointerSizeInBits(0);
   EXPECT_EQ(IntPtrTy, IntegerType::get(Ctx, IntPtrBitSize));
-  delete DL;
 }
 
 TEST_F(IRBuilderTest, UnaryOperators) {