forked from OSchip/llvm-project
87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
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//===- AMDGPUAliasAnalysis ---------------------------------------*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This is the AMGPU address space based alias analysis pass.
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_AMDGPUALIASANALYSIS_H
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#define LLVM_ANALYSIS_AMDGPUALIASANALYSIS_H
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#include "llvm/Analysis/AliasAnalysis.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Pass.h"
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namespace llvm {
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/// A simple AA result that uses TBAA metadata to answer queries.
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class AMDGPUAAResult : public AAResultBase<AMDGPUAAResult> {
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friend AAResultBase<AMDGPUAAResult>;
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const DataLayout &DL;
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public:
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explicit AMDGPUAAResult(const DataLayout &DL) : AAResultBase(), DL(DL) {}
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AMDGPUAAResult(AMDGPUAAResult &&Arg)
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: AAResultBase(std::move(Arg)), DL(Arg.DL){}
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/// Handle invalidation events from the new pass manager.
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///
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/// By definition, this result is stateless and so remains valid.
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bool invalidate(Function &, const PreservedAnalyses &) { return false; }
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AliasResult alias(const MemoryLocation &LocA, const MemoryLocation &LocB);
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bool pointsToConstantMemory(const MemoryLocation &Loc, bool OrLocal);
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private:
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bool Aliases(const MDNode *A, const MDNode *B) const;
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bool PathAliases(const MDNode *A, const MDNode *B) const;
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};
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/// Analysis pass providing a never-invalidated alias analysis result.
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class AMDGPUAA : public AnalysisInfoMixin<AMDGPUAA> {
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friend AnalysisInfoMixin<AMDGPUAA>;
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static char PassID;
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public:
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typedef AMDGPUAAResult Result;
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AMDGPUAAResult run(Function &F, AnalysisManager<Function> &AM) {
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return AMDGPUAAResult(F.getParent()->getDataLayout());
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}
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};
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/// Legacy wrapper pass to provide the AMDGPUAAResult object.
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class AMDGPUAAWrapperPass : public ImmutablePass {
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std::unique_ptr<AMDGPUAAResult> Result;
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public:
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static char ID;
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AMDGPUAAWrapperPass() : ImmutablePass(ID) {
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initializeAMDGPUAAWrapperPassPass(*PassRegistry::getPassRegistry());
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}
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AMDGPUAAResult &getResult() { return *Result; }
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const AMDGPUAAResult &getResult() const { return *Result; }
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bool doInitialization(Module &M) override {
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Result.reset(new AMDGPUAAResult(M.getDataLayout()));
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return false;
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}
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bool doFinalization(Module &M) override {
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Result.reset();
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return false;
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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};
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}
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#endif // LLVM_ANALYSIS_AMDGPUALIASANALYSIS_H
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