[NFC] OwnedValueCan: Typed pruneDebugMode.

Author: nate-chandler

include/swift/SILOptimizer/Utils/CanonicalizeOSSALifetime.h

@@ -180,6 +180,11 @@ class CanonicalOSSAConsumeInfo final {
   SWIFT_ASSERT_ONLY_DECL(void dump() const LLVM_ATTRIBUTE_USED);
 };
 
+enum PruneDebugInsts_t : bool {
+  DontPruneDebugInsts = false,
+  PruneDebugInsts = true,
+};
+
 /// Canonicalize OSSA lifetimes.
 ///
 /// Allows the allocation of analysis state to be reused across calls to
@@ -221,7 +226,7 @@ class CanonicalizeOSSALifetime final {
 private:
   /// If true, then debug_value instructions outside of non-debug
   /// liveness may be pruned during canonicalization.
-  bool pruneDebugMode;
+  const PruneDebugInsts_t pruneDebugMode;
 
   /// If true, lifetimes will not be shortened except when necessary to avoid
   /// copies.
@@ -312,8 +317,8 @@ class CanonicalizeOSSALifetime final {
     }
   };
 
-  CanonicalizeOSSALifetime(bool pruneDebugMode, bool maximizeLifetime,
-                           SILFunction *function,
+  CanonicalizeOSSALifetime(PruneDebugInsts_t pruneDebugMode,
+                           bool maximizeLifetime, SILFunction *function,
                            NonLocalAccessBlockAnalysis *accessBlockAnalysis,
                            DominanceInfo *domTree,
                            BasicCalleeAnalysis *calleeAnalysis,

lib/SILOptimizer/Mandatory/MoveOnlyObjectCheckerUtils.h

@@ -48,7 +48,7 @@ struct OSSACanonicalizer {
 
   OSSACanonicalizer(SILFunction *fn, DominanceInfo *domTree,
                     InstructionDeleter &deleter)
-      : canonicalizer(false /*pruneDebugMode*/,
+      : canonicalizer(DontPruneDebugInsts,
                       !fn->shouldOptimize() /*maximizeLifetime*/, fn,
                       nullptr /*accessBlockAnalysis*/, domTree,
                       nullptr /*calleeAnalysis*/, deleter) {}

lib/SILOptimizer/SILCombiner/SILCombine.cpp

@@ -351,7 +351,7 @@ void SILCombiner::canonicalizeOSSALifetimes(SILInstruction *currentInst) {
 
   DominanceInfo *domTree = DA->get(&Builder.getFunction());
   CanonicalizeOSSALifetime canonicalizer(
-      false /*prune debug*/,
+      DontPruneDebugInsts,
       !parentTransform->getFunction()->shouldOptimize() /*maximize lifetime*/,
       parentTransform->getFunction(), NLABA, domTree, CA, deleter);
   CanonicalizeBorrowScope borrowCanonicalizer(parentTransform->getFunction(),

lib/SILOptimizer/Transforms/CopyPropagation.cpp

@@ -425,15 +425,15 @@ namespace {
 
 class CopyPropagation : public SILFunctionTransform {
   /// If true, debug_value instructions should be pruned.
-  bool pruneDebug;
+  PruneDebugInsts_t pruneDebug;
   /// If true, all values will be canonicalized.
   bool canonicalizeAll;
   /// If true, then borrow scopes will be canonicalized, allowing copies of
   /// guaranteed values to be optimized. Does *not* shrink the borrow scope.
   bool canonicalizeBorrows;
 
 public:
-  CopyPropagation(bool pruneDebug, bool canonicalizeAll,
+  CopyPropagation(PruneDebugInsts_t pruneDebug, bool canonicalizeAll,
                   bool canonicalizeBorrows)
       : pruneDebug(pruneDebug), canonicalizeAll(canonicalizeAll),
         canonicalizeBorrows(canonicalizeBorrows) {}
@@ -645,11 +645,11 @@ void CopyPropagation::run() {
 // MandatoryCopyPropagation is not currently enabled in the -Onone pipeline
 // because it may negatively affect the debugging experience.
 SILTransform *swift::createMandatoryCopyPropagation() {
-  return new CopyPropagation(/*pruneDebug*/ true, /*canonicalizeAll*/ true,
+  return new CopyPropagation(PruneDebugInsts, /*canonicalizeAll*/ true,
                              /*canonicalizeBorrows*/ false);
 }
 
 SILTransform *swift::createCopyPropagation() {
-  return new CopyPropagation(/*pruneDebug*/ true, /*canonicalizeAll*/ true,
+  return new CopyPropagation(PruneDebugInsts, /*canonicalizeAll*/ true,
                              /*canonicalizeBorrows*/ EnableRewriteBorrows);
 }

lib/SILOptimizer/Transforms/SILMem2Reg.cpp

@@ -2071,7 +2071,7 @@ void MemoryToRegisters::canonicalizeValueLifetimes(
     }
   }
   CanonicalizeOSSALifetime canonicalizer(
-      /*pruneDebug=*/true, /*maximizeLifetime=*/!f.shouldOptimize(), &f,
+      PruneDebugInsts, /*maximizeLifetime=*/!f.shouldOptimize(), &f,
       accessBlockAnalysis, domInfo, calleeAnalysis, deleter);
   for (auto value : owned) {
     if (isa<SILUndef>(value) || value->isMarkedAsDeleted())

lib/SILOptimizer/Utils/CanonicalizeOSSALifetime.cpp

@@ -1257,7 +1257,7 @@ static FunctionTest CanonicalizeOSSALifetimeTest(
       auto *dominanceAnalysis = test.template getAnalysis<DominanceAnalysis>();
       DominanceInfo *domTree = dominanceAnalysis->get(&function);
       auto *calleeAnalysis = test.template getAnalysis<BasicCalleeAnalysis>();
-      auto pruneDebug = arguments.takeBool();
+      auto pruneDebug = PruneDebugInsts_t(arguments.takeBool());
       auto maximizeLifetimes = arguments.takeBool();
       auto respectAccessScopes = arguments.takeBool();
       InstructionDeleter deleter;