From d74b88c69dc2644bd0dc5d64e2d7413a0d4040e5 Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Sun, 17 Jul 2022 14:30:22 -0700
Subject: [PATCH] [LegacyPM] Remove CanonicalizeAliasesLegacyPass

Unused after LTO removal from optimization passline.
---
 llvm/include/llvm/InitializePasses.h              |  1 -
 llvm/include/llvm/Transforms/Scalar.h             |  1 -
 llvm/lib/Transforms/Utils/CanonicalizeAliases.cpp | 28 -----------------------
 llvm/lib/Transforms/Utils/Utils.cpp               |  1 -
 4 files changed, 31 deletions(-)

diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
index 80fd785..a605b7e2 100644
--- a/llvm/include/llvm/InitializePasses.h
+++ b/llvm/include/llvm/InitializePasses.h
@@ -88,7 +88,6 @@ void initializeBranchProbabilityInfoWrapperPassPass(PassRegistry&);
 void initializeBranchRelaxationPass(PassRegistry&);
 void initializeBreakCriticalEdgesPass(PassRegistry&);
 void initializeBreakFalseDepsPass(PassRegistry&);
-void initializeCanonicalizeAliasesLegacyPassPass(PassRegistry &);
 void initializeCanonicalizeFreezeInLoopsPass(PassRegistry &);
 void initializeCFGOnlyPrinterLegacyPassPass(PassRegistry&);
 void initializeCFGOnlyViewerLegacyPassPass(PassRegistry&);
diff --git a/llvm/include/llvm/Transforms/Scalar.h b/llvm/include/llvm/Transforms/Scalar.h
index edd492b..dbc4270 100644
--- a/llvm/include/llvm/Transforms/Scalar.h
+++ b/llvm/include/llvm/Transforms/Scalar.h
@@ -523,7 +523,6 @@ FunctionPass *createLoopDataPrefetchPass();
 
 ///===---------------------------------------------------------------------===//
 ModulePass *createNameAnonGlobalPass();
-ModulePass *createCanonicalizeAliasesPass();
 
 //===----------------------------------------------------------------------===//
 //
diff --git a/llvm/lib/Transforms/Utils/CanonicalizeAliases.cpp b/llvm/lib/Transforms/Utils/CanonicalizeAliases.cpp
index f229d4b..9101a1e 100644
--- a/llvm/lib/Transforms/Utils/CanonicalizeAliases.cpp
+++ b/llvm/lib/Transforms/Utils/CanonicalizeAliases.cpp
@@ -65,23 +65,6 @@ static bool canonicalizeAliases(Module &M) {
     canonicalizeAlias(&GA, Changed);
   return Changed;
 }
-
-// Legacy pass that canonicalizes aliases.
-class CanonicalizeAliasesLegacyPass : public ModulePass {
-
-public:
-  /// Pass identification, replacement for typeid
-  static char ID;
-
-  /// Specify pass name for debug output
-  StringRef getPassName() const override { return "Canonicalize Aliases"; }
-
-  explicit CanonicalizeAliasesLegacyPass() : ModulePass(ID) {}
-
-  bool runOnModule(Module &M) override { return canonicalizeAliases(M); }
-};
-char CanonicalizeAliasesLegacyPass::ID = 0;
-
 } // anonymous namespace
 
 PreservedAnalyses CanonicalizeAliasesPass::run(Module &M,
@@ -91,14 +74,3 @@ PreservedAnalyses CanonicalizeAliasesPass::run(Module &M,
 
   return PreservedAnalyses::none();
 }
-
-INITIALIZE_PASS_BEGIN(CanonicalizeAliasesLegacyPass, "canonicalize-aliases",
-                      "Canonicalize aliases", false, false)
-INITIALIZE_PASS_END(CanonicalizeAliasesLegacyPass, "canonicalize-aliases",
-                    "Canonicalize aliases", false, false)
-
-namespace llvm {
-ModulePass *createCanonicalizeAliasesPass() {
-  return new CanonicalizeAliasesLegacyPass();
-}
-} // namespace llvm
diff --git a/llvm/lib/Transforms/Utils/Utils.cpp b/llvm/lib/Transforms/Utils/Utils.cpp
index f34f2df..cc822a0 100644
--- a/llvm/lib/Transforms/Utils/Utils.cpp
+++ b/llvm/lib/Transforms/Utils/Utils.cpp
@@ -28,7 +28,6 @@ void llvm::initializeTransformUtils(PassRegistry &Registry) {
   initializeAssumeSimplifyPassLegacyPassPass(Registry);
   initializeAssumeBuilderPassLegacyPassPass(Registry);
   initializeBreakCriticalEdgesPass(Registry);
-  initializeCanonicalizeAliasesLegacyPassPass(Registry);
   initializeCanonicalizeFreezeInLoopsPass(Registry);
   initializeInstNamerPass(Registry);
   initializeLCSSAWrapperPassPass(Registry);
-- 
2.7.4