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//===- 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 "AMDGPU.h"
#include "llvm/Analysis/AliasAnalysis.h"
namespace llvm {
class DataLayout;
class MDNode;
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() : ImmutablePass(ID) {
initializeAMDGPUAAWrapperPassPass(*PassRegistry::getPassRegistry());
}
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
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