AMDGPU: Remove legacy PM version of AMDGPUPromoteAllocaToVector (#144986)

This is only run in the middle end with the new pass manager now,
so garbage collect the old PM version.

Author: arsenm

llvm/lib/Target/AMDGPU/AMDGPU.h

@@ -242,10 +242,6 @@ FunctionPass *createAMDGPUPromoteAlloca();
 void initializeAMDGPUPromoteAllocaPass(PassRegistry&);
 extern char &AMDGPUPromoteAllocaID;
 
-FunctionPass *createAMDGPUPromoteAllocaToVector();
-void initializeAMDGPUPromoteAllocaToVectorPass(PassRegistry&);
-extern char &AMDGPUPromoteAllocaToVectorID;
-
 struct AMDGPUPromoteAllocaPass : PassInfoMixin<AMDGPUPromoteAllocaPass> {
   AMDGPUPromoteAllocaPass(TargetMachine &TM) : TM(TM) {}
   PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);

llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp

@@ -167,34 +167,6 @@ class AMDGPUPromoteAlloca : public FunctionPass {
   }
 };
 
-class AMDGPUPromoteAllocaToVector : public FunctionPass {
-public:
-  static char ID;
-
-  AMDGPUPromoteAllocaToVector() : FunctionPass(ID) {}
-
-  bool runOnFunction(Function &F) override {
-    if (skipFunction(F))
-      return false;
-    if (auto *TPC = getAnalysisIfAvailable<TargetPassConfig>())
-      return AMDGPUPromoteAllocaImpl(
-                 TPC->getTM<TargetMachine>(),
-                 getAnalysis<LoopInfoWrapperPass>().getLoopInfo())
-          .run(F, /*PromoteToLDS*/ false);
-    return false;
-  }
-
-  StringRef getPassName() const override {
-    return "AMDGPU Promote Alloca to vector";
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.setPreservesCFG();
-    AU.addRequired<LoopInfoWrapperPass>();
-    FunctionPass::getAnalysisUsage(AU);
-  }
-};
-
 static unsigned getMaxVGPRs(unsigned LDSBytes, const TargetMachine &TM,
                             const Function &F) {
   if (!TM.getTargetTriple().isAMDGCN())
@@ -216,7 +188,6 @@ static unsigned getMaxVGPRs(unsigned LDSBytes, const TargetMachine &TM,
 } // end anonymous namespace
 
 char AMDGPUPromoteAlloca::ID = 0;
-char AMDGPUPromoteAllocaToVector::ID = 0;
 
 INITIALIZE_PASS_BEGIN(AMDGPUPromoteAlloca, DEBUG_TYPE,
                       "AMDGPU promote alloca to vector or LDS", false, false)
@@ -227,14 +198,7 @@ INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass)
 INITIALIZE_PASS_END(AMDGPUPromoteAlloca, DEBUG_TYPE,
                     "AMDGPU promote alloca to vector or LDS", false, false)
 
-INITIALIZE_PASS_BEGIN(AMDGPUPromoteAllocaToVector, DEBUG_TYPE "-to-vector",
-                      "AMDGPU promote alloca to vector", false, false)
-INITIALIZE_PASS_DEPENDENCY(LoopInfoWrapperPass)
-INITIALIZE_PASS_END(AMDGPUPromoteAllocaToVector, DEBUG_TYPE "-to-vector",
-                    "AMDGPU promote alloca to vector", false, false)
-
 char &llvm::AMDGPUPromoteAllocaID = AMDGPUPromoteAlloca::ID;
-char &llvm::AMDGPUPromoteAllocaToVectorID = AMDGPUPromoteAllocaToVector::ID;
 
 PreservedAnalyses AMDGPUPromoteAllocaPass::run(Function &F,
                                                FunctionAnalysisManager &AM) {
@@ -264,10 +228,6 @@ FunctionPass *llvm::createAMDGPUPromoteAlloca() {
   return new AMDGPUPromoteAlloca();
 }
 
-FunctionPass *llvm::createAMDGPUPromoteAllocaToVector() {
-  return new AMDGPUPromoteAllocaToVector();
-}
-
 static void collectAllocaUses(AllocaInst &Alloca,
                               SmallVectorImpl<Use *> &Uses) {
   SmallVector<Instruction *, 4> WorkList({&Alloca});

llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp

@@ -529,7 +529,6 @@ extern "C" LLVM_ABI LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAMDGPUTarget() {
   initializeAMDGPUPreLegalizerCombinerPass(*PR);
   initializeAMDGPURegBankCombinerPass(*PR);
   initializeAMDGPUPromoteAllocaPass(*PR);
-  initializeAMDGPUPromoteAllocaToVectorPass(*PR);
   initializeAMDGPUCodeGenPreparePass(*PR);
   initializeAMDGPULateCodeGenPrepareLegacyPass(*PR);
   initializeAMDGPURemoveIncompatibleFunctionsLegacyPass(*PR);