[llvm] [CodeGen] Port ExpandMemCmp to new pass manager (PR #74050)

via llvm-commits llvm-commits at lists.llvm.org
Fri Dec 1 00:42:58 PST 2023


llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-transforms

Author: None (paperchalice)

<details>
<summary>Changes</summary>



---

Patch is 20.28 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/74050.diff


16 Files Affected:

- (modified) llvm/include/llvm/CodeGen/CodeGenPassBuilder.h (+2-1) 
- (added) llvm/include/llvm/CodeGen/ExpandMemCmp.h (+29) 
- (modified) llvm/include/llvm/CodeGen/MachinePassRegistry.def (+1-1) 
- (modified) llvm/include/llvm/CodeGen/Passes.h (+1-1) 
- (modified) llvm/include/llvm/InitializePasses.h (+1-1) 
- (modified) llvm/include/llvm/LinkAllPasses.h (+1-1) 
- (modified) llvm/lib/CodeGen/CodeGen.cpp (+1-1) 
- (modified) llvm/lib/CodeGen/ExpandMemCmp.cpp (+56-42) 
- (modified) llvm/lib/CodeGen/TargetPassConfig.cpp (+1-1) 
- (modified) llvm/lib/Passes/PassBuilder.cpp (+1) 
- (modified) llvm/lib/Passes/PassRegistry.def (+1) 
- (modified) llvm/test/Transforms/ExpandMemCmp/AArch64/memcmp.ll (+1) 
- (modified) llvm/test/Transforms/ExpandMemCmp/X86/bcmp.ll (+1) 
- (modified) llvm/test/Transforms/ExpandMemCmp/X86/memcmp-x32.ll (+1) 
- (modified) llvm/test/Transforms/ExpandMemCmp/X86/memcmp.ll (+2) 
- (modified) llvm/tools/opt/opt.cpp (+1-1) 


``````````diff
diff --git a/llvm/include/llvm/CodeGen/CodeGenPassBuilder.h b/llvm/include/llvm/CodeGen/CodeGenPassBuilder.h
index 0a12f4210998627..8ecbdfd5520f1f8 100644
--- a/llvm/include/llvm/CodeGen/CodeGenPassBuilder.h
+++ b/llvm/include/llvm/CodeGen/CodeGenPassBuilder.h
@@ -23,6 +23,7 @@
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/Analysis/TypeBasedAliasAnalysis.h"
 #include "llvm/CodeGen/CallBrPrepare.h"
+#include "llvm/CodeGen/ExpandMemCmp.h"
 #include "llvm/CodeGen/ExpandReductions.h"
 #include "llvm/CodeGen/MachinePassManager.h"
 #include "llvm/CodeGen/PreISelIntrinsicLowering.h"
@@ -614,7 +615,7 @@ void CodeGenPassBuilder<Derived>::addIRPasses(AddIRPass &addPass) const {
     // target lowering hook.
     if (!Opt.DisableMergeICmps)
       addPass(MergeICmpsPass());
-    addPass(ExpandMemCmpPass());
+    addPass(ExpandMemCmpPass(&TM));
   }
 
   // Run GC lowering passes for builtin collectors
diff --git a/llvm/include/llvm/CodeGen/ExpandMemCmp.h b/llvm/include/llvm/CodeGen/ExpandMemCmp.h
new file mode 100644
index 000000000000000..94a877854f327a3
--- /dev/null
+++ b/llvm/include/llvm/CodeGen/ExpandMemCmp.h
@@ -0,0 +1,29 @@
+//===--- ExpandMemCmp.h - Expand memcmp() to load/stores --------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_EXPANDMEMCMP_H
+#define LLVM_CODEGEN_EXPANDMEMCMP_H
+
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+class TargetMachine;
+
+class ExpandMemCmpPass : public PassInfoMixin<ExpandMemCmpPass> {
+  const TargetMachine *TM;
+
+public:
+  explicit ExpandMemCmpPass(const TargetMachine *TM_) : TM(TM_) {}
+
+  PreservedAnalyses run(Function &F, FunctionAnalysisManager &FAM);
+};
+
+} // namespace llvm
+
+#endif // LLVM_CODEGEN_EXPANDMEMCMP_H
diff --git a/llvm/include/llvm/CodeGen/MachinePassRegistry.def b/llvm/include/llvm/CodeGen/MachinePassRegistry.def
index fc2d07fd6616fce..78aa46322297882 100644
--- a/llvm/include/llvm/CodeGen/MachinePassRegistry.def
+++ b/llvm/include/llvm/CodeGen/MachinePassRegistry.def
@@ -42,6 +42,7 @@ FUNCTION_PASS("ee-instrument", EntryExitInstrumenterPass, (false))
 FUNCTION_PASS("expand-large-div-rem", ExpandLargeDivRemPass, ())
 FUNCTION_PASS("expand-large-fp-convert", ExpandLargeFpConvertPass, ())
 FUNCTION_PASS("expand-reductions", ExpandReductionsPass, ())
+FUNCTION_PASS("expandmemcmp", ExpandMemCmpPass, (TM))
 FUNCTION_PASS("expandvp", ExpandVectorPredicationPass, ())
 FUNCTION_PASS("lower-constant-intrinsics", LowerConstantIntrinsicsPass, ())
 FUNCTION_PASS("lowerinvoke", LowerInvokePass, ())
@@ -121,7 +122,6 @@ DUMMY_FUNCTION_PASS("cfguard-check", CFGuardCheckPass, ())
 DUMMY_FUNCTION_PASS("cfguard-dispatch", CFGuardDispatchPass, ())
 DUMMY_FUNCTION_PASS("codegenprepare", CodeGenPreparePass, ())
 DUMMY_FUNCTION_PASS("dwarfehprepare", DwarfEHPass, ())
-DUMMY_FUNCTION_PASS("expandmemcmp", ExpandMemCmpPass, ())
 DUMMY_FUNCTION_PASS("gc-info-printer", GCInfoPrinterPass, ())
 DUMMY_FUNCTION_PASS("gc-lowering", GCLoweringPass, ())
 DUMMY_FUNCTION_PASS("indirectbr-expand", IndirectBrExpandPass, ())
diff --git a/llvm/include/llvm/CodeGen/Passes.h b/llvm/include/llvm/CodeGen/Passes.h
index 712048017bca1a1..c06a077b01bb9ff 100644
--- a/llvm/include/llvm/CodeGen/Passes.h
+++ b/llvm/include/llvm/CodeGen/Passes.h
@@ -524,7 +524,7 @@ namespace llvm {
   FunctionPass *createExpandLargeFpConvertPass();
 
   // This pass expands memcmp() to load/stores.
-  FunctionPass *createExpandMemCmpPass();
+  FunctionPass *createExpandMemCmpLegacyPass();
 
   /// Creates Break False Dependencies pass. \see BreakFalseDeps.cpp
   FunctionPass *createBreakFalseDeps();
diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
index 66177f9b9f774f4..fde844639712a97 100644
--- a/llvm/include/llvm/InitializePasses.h
+++ b/llvm/include/llvm/InitializePasses.h
@@ -103,7 +103,7 @@ void initializeEdgeBundlesPass(PassRegistry&);
 void initializeEHContGuardCatchretPass(PassRegistry &);
 void initializeExpandLargeFpConvertLegacyPassPass(PassRegistry&);
 void initializeExpandLargeDivRemLegacyPassPass(PassRegistry&);
-void initializeExpandMemCmpPassPass(PassRegistry&);
+void initializeExpandMemCmpLegacyPassPass(PassRegistry&);
 void initializeExpandPostRAPass(PassRegistry&);
 void initializeExpandReductionsPass(PassRegistry&);
 void initializeExpandVectorPredicationPass(PassRegistry &);
diff --git a/llvm/include/llvm/LinkAllPasses.h b/llvm/include/llvm/LinkAllPasses.h
index bf990a1408faba4..ba866cfda4b0d09 100644
--- a/llvm/include/llvm/LinkAllPasses.h
+++ b/llvm/include/llvm/LinkAllPasses.h
@@ -119,7 +119,7 @@ namespace {
       (void) llvm::createPostDomTree();
       (void) llvm::createMergeICmpsLegacyPass();
       (void) llvm::createExpandLargeDivRemPass();
-      (void) llvm::createExpandMemCmpPass();
+      (void) llvm::createExpandMemCmpLegacyPass();
       (void) llvm::createExpandVectorPredicationPass();
       std::string buf;
       llvm::raw_string_ostream os(buf);
diff --git a/llvm/lib/CodeGen/CodeGen.cpp b/llvm/lib/CodeGen/CodeGen.cpp
index 79a95ee0d747a1c..cc5ea859754b992 100644
--- a/llvm/lib/CodeGen/CodeGen.cpp
+++ b/llvm/lib/CodeGen/CodeGen.cpp
@@ -41,7 +41,7 @@ void llvm::initializeCodeGen(PassRegistry &Registry) {
   initializeEarlyTailDuplicatePass(Registry);
   initializeExpandLargeDivRemLegacyPassPass(Registry);
   initializeExpandLargeFpConvertLegacyPassPass(Registry);
-  initializeExpandMemCmpPassPass(Registry);
+  initializeExpandMemCmpLegacyPassPass(Registry);
   initializeExpandPostRAPass(Registry);
   initializeFEntryInserterPass(Registry);
   initializeFinalizeISelPass(Registry);
diff --git a/llvm/lib/CodeGen/ExpandMemCmp.cpp b/llvm/lib/CodeGen/ExpandMemCmp.cpp
index e6ca1409624905a..fe4662df835a04a 100644
--- a/llvm/lib/CodeGen/ExpandMemCmp.cpp
+++ b/llvm/lib/CodeGen/ExpandMemCmp.cpp
@@ -11,6 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/CodeGen/ExpandMemCmp.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Analysis/ConstantFolding.h"
 #include "llvm/Analysis/DomTreeUpdater.h"
@@ -61,7 +62,6 @@ static cl::opt<unsigned> MaxLoadsPerMemcmpOptSize(
 
 namespace {
 
-
 // This class provides helper functions to expand a memcmp library call into an
 // inline expansion.
 class MemCmpExpansion {
@@ -91,8 +91,7 @@ class MemCmpExpansion {
   // 1x1-byte load, which would be represented as [{16, 0}, {16, 16}, {1, 32}.
   struct LoadEntry {
     LoadEntry(unsigned LoadSize, uint64_t Offset)
-        : LoadSize(LoadSize), Offset(Offset) {
-    }
+        : LoadSize(LoadSize), Offset(Offset) {}
 
     // The size of the load for this block, in bytes.
     unsigned LoadSize;
@@ -723,7 +722,8 @@ Value *MemCmpExpansion::getMemCmpExpansion() {
     // calculate which source was larger. The calculation requires the
     // two loaded source values of each load compare block.
     // These will be saved in the phi nodes created by setupResultBlockPHINodes.
-    if (!IsUsedForZeroCmp) setupResultBlockPHINodes();
+    if (!IsUsedForZeroCmp)
+      setupResultBlockPHINodes();
 
     // Create the number of required load compare basic blocks.
     createLoadCmpBlocks();
@@ -853,15 +853,14 @@ static bool expandMemCmp(CallInst *CI, const TargetTransformInfo *TTI,
       IsBCmp || isOnlyUsedInZeroEqualityComparison(CI);
   bool OptForSize = CI->getFunction()->hasOptSize() ||
                     llvm::shouldOptimizeForSize(CI->getParent(), PSI, BFI);
-  auto Options = TTI->enableMemCmpExpansion(OptForSize,
-                                            IsUsedForZeroCmp);
-  if (!Options) return false;
+  auto Options = TTI->enableMemCmpExpansion(OptForSize, IsUsedForZeroCmp);
+  if (!Options)
+    return false;
 
   if (MemCmpEqZeroNumLoadsPerBlock.getNumOccurrences())
     Options.NumLoadsPerBlock = MemCmpEqZeroNumLoadsPerBlock;
 
-  if (OptForSize &&
-      MaxLoadsPerMemcmpOptSize.getNumOccurrences())
+  if (OptForSize && MaxLoadsPerMemcmpOptSize.getNumOccurrences())
     Options.MaxNumLoads = MaxLoadsPerMemcmpOptSize;
 
   if (!OptForSize && MaxLoadsPerMemcmp.getNumOccurrences())
@@ -886,22 +885,35 @@ static bool expandMemCmp(CallInst *CI, const TargetTransformInfo *TTI,
   return true;
 }
 
-class ExpandMemCmpPass : public FunctionPass {
+// Returns true if a change was made.
+static bool runOnBlock(BasicBlock &BB, const TargetLibraryInfo *TLI,
+                       const TargetTransformInfo *TTI, const TargetLowering *TL,
+                       const DataLayout &DL, ProfileSummaryInfo *PSI,
+                       BlockFrequencyInfo *BFI, DomTreeUpdater *DTU);
+
+static PreservedAnalyses runImpl(Function &F, const TargetLibraryInfo *TLI,
+                                 const TargetTransformInfo *TTI,
+                                 const TargetLowering *TL,
+                                 ProfileSummaryInfo *PSI,
+                                 BlockFrequencyInfo *BFI, DominatorTree *DT);
+
+class ExpandMemCmpLegacyPass : public FunctionPass {
 public:
   static char ID;
 
-  ExpandMemCmpPass() : FunctionPass(ID) {
-    initializeExpandMemCmpPassPass(*PassRegistry::getPassRegistry());
+  ExpandMemCmpLegacyPass() : FunctionPass(ID) {
+    initializeExpandMemCmpLegacyPassPass(*PassRegistry::getPassRegistry());
   }
 
   bool runOnFunction(Function &F) override {
-    if (skipFunction(F)) return false;
+    if (skipFunction(F))
+      return false;
 
     auto *TPC = getAnalysisIfAvailable<TargetPassConfig>();
     if (!TPC) {
       return false;
     }
-    const TargetLowering* TL =
+    const TargetLowering *TL =
         TPC->getTM<TargetMachine>().getSubtargetImpl(F)->getTargetLowering();
 
     const TargetLibraryInfo *TLI =
@@ -909,9 +921,9 @@ class ExpandMemCmpPass : public FunctionPass {
     const TargetTransformInfo *TTI =
         &getAnalysis<TargetTransformInfoWrapperPass>().getTTI(F);
     auto *PSI = &getAnalysis<ProfileSummaryInfoWrapperPass>().getPSI();
-    auto *BFI = (PSI && PSI->hasProfileSummary()) ?
-           &getAnalysis<LazyBlockFrequencyInfoPass>().getBFI() :
-           nullptr;
+    auto *BFI = (PSI && PSI->hasProfileSummary())
+                    ? &getAnalysis<LazyBlockFrequencyInfoPass>().getBFI()
+                    : nullptr;
     DominatorTree *DT = nullptr;
     if (auto *DTWP = getAnalysisIfAvailable<DominatorTreeWrapperPass>())
       DT = &DTWP->getDomTree();
@@ -928,25 +940,13 @@ class ExpandMemCmpPass : public FunctionPass {
     LazyBlockFrequencyInfoPass::getLazyBFIAnalysisUsage(AU);
     FunctionPass::getAnalysisUsage(AU);
   }
-
-  PreservedAnalyses runImpl(Function &F, const TargetLibraryInfo *TLI,
-                            const TargetTransformInfo *TTI,
-                            const TargetLowering *TL, ProfileSummaryInfo *PSI,
-                            BlockFrequencyInfo *BFI, DominatorTree *DT);
-  // Returns true if a change was made.
-  bool runOnBlock(BasicBlock &BB, const TargetLibraryInfo *TLI,
-                  const TargetTransformInfo *TTI, const TargetLowering *TL,
-                  const DataLayout &DL, ProfileSummaryInfo *PSI,
-                  BlockFrequencyInfo *BFI, DomTreeUpdater *DTU);
 };
 
-bool ExpandMemCmpPass::runOnBlock(BasicBlock &BB, const TargetLibraryInfo *TLI,
-                                  const TargetTransformInfo *TTI,
-                                  const TargetLowering *TL,
-                                  const DataLayout &DL, ProfileSummaryInfo *PSI,
-                                  BlockFrequencyInfo *BFI,
-                                  DomTreeUpdater *DTU) {
-  for (Instruction& I : BB) {
+bool runOnBlock(BasicBlock &BB, const TargetLibraryInfo *TLI,
+                const TargetTransformInfo *TTI, const TargetLowering *TL,
+                const DataLayout &DL, ProfileSummaryInfo *PSI,
+                BlockFrequencyInfo *BFI, DomTreeUpdater *DTU) {
+  for (Instruction &I : BB) {
     CallInst *CI = dyn_cast<CallInst>(&I);
     if (!CI) {
       continue;
@@ -961,8 +961,7 @@ bool ExpandMemCmpPass::runOnBlock(BasicBlock &BB, const TargetLibraryInfo *TLI,
   return false;
 }
 
-PreservedAnalyses
-ExpandMemCmpPass::runImpl(Function &F, const TargetLibraryInfo *TLI,
+PreservedAnalyses runImpl(Function &F, const TargetLibraryInfo *TLI,
                           const TargetTransformInfo *TTI,
                           const TargetLowering *TL, ProfileSummaryInfo *PSI,
                           BlockFrequencyInfo *BFI, DominatorTree *DT) {
@@ -970,7 +969,7 @@ ExpandMemCmpPass::runImpl(Function &F, const TargetLibraryInfo *TLI,
   if (DT)
     DTU.emplace(DT, DomTreeUpdater::UpdateStrategy::Lazy);
 
-  const DataLayout& DL = F.getParent()->getDataLayout();
+  const DataLayout &DL = F.getParent()->getDataLayout();
   bool MadeChanges = false;
   for (auto BBIt = F.begin(); BBIt != F.end();) {
     if (runOnBlock(*BBIt, TLI, TTI, TL, DL, PSI, BFI, DTU ? &*DTU : nullptr)) {
@@ -994,17 +993,32 @@ ExpandMemCmpPass::runImpl(Function &F, const TargetLibraryInfo *TLI,
 
 } // namespace
 
-char ExpandMemCmpPass::ID = 0;
-INITIALIZE_PASS_BEGIN(ExpandMemCmpPass, "expandmemcmp",
+PreservedAnalyses ExpandMemCmpPass::run(Function &F,
+                                        FunctionAnalysisManager &FAM) {
+  const auto *TL = TM->getSubtargetImpl(F)->getTargetLowering();
+  const auto &TLI = FAM.getResult<TargetLibraryAnalysis>(F);
+  const auto &TTI = FAM.getResult<TargetIRAnalysis>(F);
+  auto *PSI = FAM.getResult<ModuleAnalysisManagerFunctionProxy>(F)
+                  .getCachedResult<ProfileSummaryAnalysis>(*F.getParent());
+  BlockFrequencyInfo *BFI = (PSI && PSI->hasProfileSummary())
+                                ? &FAM.getResult<BlockFrequencyAnalysis>(F)
+                                : nullptr;
+  auto *DT = FAM.getCachedResult<DominatorTreeAnalysis>(F);
+
+  return runImpl(F, &TLI, &TTI, TL, PSI, BFI, DT);
+}
+
+char ExpandMemCmpLegacyPass::ID = 0;
+INITIALIZE_PASS_BEGIN(ExpandMemCmpLegacyPass, "expandmemcmp",
                       "Expand memcmp() to load/stores", false, false)
 INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
 INITIALIZE_PASS_DEPENDENCY(TargetTransformInfoWrapperPass)
 INITIALIZE_PASS_DEPENDENCY(LazyBlockFrequencyInfoPass)
 INITIALIZE_PASS_DEPENDENCY(ProfileSummaryInfoWrapperPass)
 INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
-INITIALIZE_PASS_END(ExpandMemCmpPass, "expandmemcmp",
+INITIALIZE_PASS_END(ExpandMemCmpLegacyPass, "expandmemcmp",
                     "Expand memcmp() to load/stores", false, false)
 
-FunctionPass *llvm::createExpandMemCmpPass() {
-  return new ExpandMemCmpPass();
+FunctionPass *llvm::createExpandMemCmpLegacyPass() {
+  return new ExpandMemCmpLegacyPass();
 }
diff --git a/llvm/lib/CodeGen/TargetPassConfig.cpp b/llvm/lib/CodeGen/TargetPassConfig.cpp
index 1f7c949cd6031b1..2183e07d23c2080 100644
--- a/llvm/lib/CodeGen/TargetPassConfig.cpp
+++ b/llvm/lib/CodeGen/TargetPassConfig.cpp
@@ -870,7 +870,7 @@ void TargetPassConfig::addIRPasses() {
     // target lowering hook.
     if (!DisableMergeICmps)
       addPass(createMergeICmpsLegacyPass());
-    addPass(createExpandMemCmpPass());
+    addPass(createExpandMemCmpLegacyPass());
   }
 
   // Run GC lowering passes for builtin collectors
diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp
index dad7a74693cbccd..32a8bc5e6fda220 100644
--- a/llvm/lib/Passes/PassBuilder.cpp
+++ b/llvm/lib/Passes/PassBuilder.cpp
@@ -76,6 +76,7 @@
 #include "llvm/CodeGen/DwarfEHPrepare.h"
 #include "llvm/CodeGen/ExpandLargeDivRem.h"
 #include "llvm/CodeGen/ExpandLargeFpConvert.h"
+#include "llvm/CodeGen/ExpandMemCmp.h"
 #include "llvm/CodeGen/HardwareLoops.h"
 #include "llvm/CodeGen/SafeStack.h"
 #include "llvm/CodeGen/TypePromotion.h"
diff --git a/llvm/lib/Passes/PassRegistry.def b/llvm/lib/Passes/PassRegistry.def
index e23863a235a1609..cb91496854dd8f7 100644
--- a/llvm/lib/Passes/PassRegistry.def
+++ b/llvm/lib/Passes/PassRegistry.def
@@ -304,6 +304,7 @@ FUNCTION_PASS("dse", DSEPass())
 FUNCTION_PASS("dwarfehprepare", DwarfEHPreparePass(TM))
 FUNCTION_PASS("expand-large-div-rem", ExpandLargeDivRemPass(TM))
 FUNCTION_PASS("expand-large-fp-convert", ExpandLargeFpConvertPass(TM))
+FUNCTION_PASS("expandmemcmp", ExpandMemCmpPass(TM))
 FUNCTION_PASS("fix-irreducible", FixIrreduciblePass())
 FUNCTION_PASS("flattencfg", FlattenCFGPass())
 FUNCTION_PASS("float2int", Float2IntPass())
diff --git a/llvm/test/Transforms/ExpandMemCmp/AArch64/memcmp.ll b/llvm/test/Transforms/ExpandMemCmp/AArch64/memcmp.ll
index 54f8c7006bb516f..888562f9ab91d43 100644
--- a/llvm/test/Transforms/ExpandMemCmp/AArch64/memcmp.ll
+++ b/llvm/test/Transforms/ExpandMemCmp/AArch64/memcmp.ll
@@ -1,5 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
 ; RUN: opt -S -expandmemcmp -memcmp-num-loads-per-block=1 -mtriple=aarch64-unknown-unknown < %s | FileCheck %s
+; RUN: opt -S -passes=expandmemcmp -memcmp-num-loads-per-block=1 -mtriple=aarch64-unknown-unknown < %s | FileCheck %s
 
 declare i32 @memcmp(ptr nocapture, ptr nocapture, i64)
 
diff --git a/llvm/test/Transforms/ExpandMemCmp/X86/bcmp.ll b/llvm/test/Transforms/ExpandMemCmp/X86/bcmp.ll
index 57c91f9063797f0..b006b8419672a73 100644
--- a/llvm/test/Transforms/ExpandMemCmp/X86/bcmp.ll
+++ b/llvm/test/Transforms/ExpandMemCmp/X86/bcmp.ll
@@ -1,5 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt -S -expandmemcmp -memcmp-num-loads-per-block=1 -mtriple=x86_64-unknown-unknown -data-layout=e-m:o-i64:64-f80:128-n8:16:32:64-S128         < %s | FileCheck %s --check-prefix=X64
+; RUN: opt -S -passes=expandmemcmp -memcmp-num-loads-per-block=1 -mtriple=x86_64-unknown-unknown -data-layout=e-m:o-i64:64-f80:128-n8:16:32:64-S128         < %s | FileCheck %s --check-prefix=X64
 
 declare i32 @bcmp(ptr nocapture, ptr nocapture, i64)
 
diff --git a/llvm/test/Transforms/ExpandMemCmp/X86/memcmp-x32.ll b/llvm/test/Transforms/ExpandMemCmp/X86/memcmp-x32.ll
index f56d9688a01e12d..9451fa3619aea4c 100644
--- a/llvm/test/Transforms/ExpandMemCmp/X86/memcmp-x32.ll
+++ b/llvm/test/Transforms/ExpandMemCmp/X86/memcmp-x32.ll
@@ -1,5 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt -S -expandmemcmp -mtriple=i686-unknown-unknown   -data-layout=e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128 < %s | FileCheck %s --check-prefix=X32
+; RUN: opt -S -passes=expandmemcmp -mtriple=i686-unknown-unknown   -data-layout=e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128 < %s | FileCheck %s --check-prefix=X32
 
 declare i32 @memcmp(ptr nocapture, ptr nocapture, i32)
 
diff --git a/llvm/test/Transforms/ExpandMemCmp/X86/memcmp.ll b/llvm/test/Transforms/ExpandMemCmp/X86/memcmp.ll
index 2594f53971393d4..cf1191a37d14cbd 100644
--- a/llvm/test/Transforms/ExpandMemCmp/X86/memcmp.ll
+++ b/llvm/test/Transforms/ExpandMemCmp/X86/memcmp.ll
@@ -1,6 +1,8 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt -S -expandmemcmp -memcmp-num-loads-per-block=1 -mtriple=x86_64-unknown-unknown -data-layout=e-m:o-i64:64-f80:128-n8:16:32:64-S128         < %s | FileCheck %s --check-prefix=X64 --check-prefix=X64_1LD
 ; RUN: opt -S -expandmemcmp -memcmp-num-loads-per-block=2 -mtriple=x86_64-unknown-unknown -data-layout=e-m:o-i64:64-f80:128-n8:16:32:64-S128         < %s | FileCheck %s --check-prefix=X64 --check-prefix=X64_2LD
+; RUN: opt -S -passes=expandmemcmp -memcmp-num-loads-per-block=1 -mtriple=x86_64-unknown-unknown -data-layout=e-m:o-i64:64-f80:128-n8:16:32:64-S128         < %s | FileCheck %s --check-prefix=X64 --check-prefix=X64_1LD
+; RUN: opt -S -passes=expandmemcmp -memcmp-num-loads-per-block=2 -mtriple=x86_64-unknown-unknown -data-layout=e-m:o-i64:64-f80:128-n8:16:32:64-S128         < %s | FileCheck %s --check-prefix=X64 --check-prefix=X64_2LD
 
 declare i32 @memcmp(ptr nocapture, ptr nocapture, i64)
 
diff --git a/llvm/tools/opt/opt.cpp b/llvm/tools/opt/opt.cpp
index 5e5e5ce233f310a..d309aca2ec46a2f 100644
--- a/llvm/tools/opt/opt.cpp
+++ b/llvm/tools/opt/opt.cpp
@@ -422,7 +422,7 @@ int main(int argc, char **argv) {
   // supported.
   initializeExpandLargeDivRemLegacyPassPass(Registry);
   initializeExpa...
[truncated]

``````````

</details>


https://github.com/llvm/llvm-project/pull/74050


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