forked from OSchip/llvm-project
116 lines
3.4 KiB
C++
116 lines
3.4 KiB
C++
//===- AMDGPUAliasAnalysis --------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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_LIB_TARGET_AMDGPU_AMDGPUALIASANALYSIS_H
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#define LLVM_LIB_TARGET_AMDGPU_AMDGPUALIASANALYSIS_H
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#include "AMDGPU.h"
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#include "llvm/ADT/Triple.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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#include <algorithm>
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#include <memory>
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namespace llvm {
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class DataLayout;
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class MDNode;
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class MemoryLocation;
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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, Triple T) : AAResultBase(),
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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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AAQueryInfo &AAQI);
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bool pointsToConstantMemory(const MemoryLocation &Loc, AAQueryInfo &AAQI,
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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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using Result = AMDGPUAAResult;
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AMDGPUAAResult run(Function &F, AnalysisManager<Function> &AM) {
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return AMDGPUAAResult(F.getParent()->getDataLayout(),
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Triple(F.getParent()->getTargetTriple()));
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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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Triple(M.getTargetTriple())));
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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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// Wrapper around ExternalAAWrapperPass so that the default constructor gets the
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// callback.
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class AMDGPUExternalAAWrapper : public ExternalAAWrapperPass {
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public:
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static char ID;
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AMDGPUExternalAAWrapper() : ExternalAAWrapperPass(
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[](Pass &P, Function &, AAResults &AAR) {
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if (auto *WrapperPass = P.getAnalysisIfAvailable<AMDGPUAAWrapperPass>())
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AAR.addAAResult(WrapperPass->getResult());
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}) {}
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUALIASANALYSIS_H
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