| //===- AMDGPUAliasAnalysis --------------------------------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| /// \file |
| /// This is the AMGPU address space based alias analysis pass. |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUALIASANALYSIS_H |
| #define LLVM_LIB_TARGET_AMDGPU_AMDGPUALIASANALYSIS_H |
| |
| #include "llvm/Analysis/AliasAnalysis.h" |
| |
| namespace llvm { |
| |
| class DataLayout; |
| class MemoryLocation; |
| |
| /// A simple AA result that uses TBAA metadata to answer queries. |
| class AMDGPUAAResult : public AAResultBase<AMDGPUAAResult> { |
| friend AAResultBase<AMDGPUAAResult>; |
| |
| const DataLayout &DL; |
| |
| public: |
| explicit AMDGPUAAResult(const DataLayout &DL) : AAResultBase(), DL(DL) {} |
| AMDGPUAAResult(AMDGPUAAResult &&Arg) |
| : AAResultBase(std::move(Arg)), DL(Arg.DL) {} |
| |
| /// Handle invalidation events from the new pass manager. |
| /// |
| /// By definition, this result is stateless and so remains valid. |
| bool invalidate(Function &, const PreservedAnalyses &, |
| FunctionAnalysisManager::Invalidator &Inv) { |
| return false; |
| } |
| |
| AliasResult alias(const MemoryLocation &LocA, const MemoryLocation &LocB, |
| AAQueryInfo &AAQI); |
| bool pointsToConstantMemory(const MemoryLocation &Loc, AAQueryInfo &AAQI, |
| bool OrLocal); |
| }; |
| |
| /// Analysis pass providing a never-invalidated alias analysis result. |
| class AMDGPUAA : public AnalysisInfoMixin<AMDGPUAA> { |
| friend AnalysisInfoMixin<AMDGPUAA>; |
| |
| static AnalysisKey Key; |
| |
| public: |
| using Result = AMDGPUAAResult; |
| |
| AMDGPUAAResult run(Function &F, AnalysisManager<Function> &AM) { |
| return AMDGPUAAResult(F.getParent()->getDataLayout()); |
| } |
| }; |
| |
| /// Legacy wrapper pass to provide the AMDGPUAAResult object. |
| class AMDGPUAAWrapperPass : public ImmutablePass { |
| std::unique_ptr<AMDGPUAAResult> Result; |
| |
| public: |
| static char ID; |
| |
| AMDGPUAAWrapperPass(); |
| |
| AMDGPUAAResult &getResult() { return *Result; } |
| const AMDGPUAAResult &getResult() const { return *Result; } |
| |
| bool doInitialization(Module &M) override { |
| Result.reset(new AMDGPUAAResult(M.getDataLayout())); |
| return false; |
| } |
| |
| bool doFinalization(Module &M) override { |
| Result.reset(); |
| return false; |
| } |
| |
| void getAnalysisUsage(AnalysisUsage &AU) const override; |
| }; |
| |
| // Wrapper around ExternalAAWrapperPass so that the default constructor gets the |
| // callback. |
| class AMDGPUExternalAAWrapper : public ExternalAAWrapperPass { |
| public: |
| static char ID; |
| |
| AMDGPUExternalAAWrapper() : ExternalAAWrapperPass( |
| [](Pass &P, Function &, AAResults &AAR) { |
| if (auto *WrapperPass = P.getAnalysisIfAvailable<AMDGPUAAWrapperPass>()) |
| AAR.addAAResult(WrapperPass->getResult()); |
| }) {} |
| }; |
| |
| } // end namespace llvm |
| |
| #endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUALIASANALYSIS_H |