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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
114 lines
3.4 KiB
C++
114 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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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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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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