87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
//===- AMDGPUAliasAnalysis ---------------------------------------*- C++ -*-==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
/// \file
|
|
/// This is the AMGPU address space based alias analysis pass.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ANALYSIS_AMDGPUALIASANALYSIS_H
|
|
#define LLVM_ANALYSIS_AMDGPUALIASANALYSIS_H
|
|
|
|
#include "llvm/Analysis/AliasAnalysis.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/Pass.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// 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 &) { return false; }
|
|
|
|
AliasResult alias(const MemoryLocation &LocA, const MemoryLocation &LocB);
|
|
bool pointsToConstantMemory(const MemoryLocation &Loc, bool OrLocal);
|
|
|
|
private:
|
|
bool Aliases(const MDNode *A, const MDNode *B) const;
|
|
bool PathAliases(const MDNode *A, const MDNode *B) const;
|
|
};
|
|
|
|
/// Analysis pass providing a never-invalidated alias analysis result.
|
|
class AMDGPUAA : public AnalysisInfoMixin<AMDGPUAA> {
|
|
friend AnalysisInfoMixin<AMDGPUAA>;
|
|
static char PassID;
|
|
|
|
public:
|
|
typedef AMDGPUAAResult Result;
|
|
|
|
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;
|
|
};
|
|
|
|
}
|
|
#endif // LLVM_ANALYSIS_AMDGPUALIASANALYSIS_H
|