1a14bfa022
As we introduced target triple environment amdgiz and amdgizcl, the address space values are no longer enums. We have to decide the value by target triple. The basic idea is to use struct AMDGPUAS to represent address space values. For address space values which are not depend on target triple, use static const members, so that they don't occupy extra memory space and is equivalent to a compile time constant. Since the struct is lightweight and cheap, it can be created on the fly at the point of usage. Or it can be added as member to a pass and created at the beginning of the run* function. Differential Revision: https://reviews.llvm.org/D31284 llvm-svn: 298846
102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
//===- 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 "AMDGPU.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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AMDGPUAS AS;
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public:
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explicit AMDGPUAAResult(const DataLayout &DL, Triple T) : AAResultBase(),
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DL(DL), AS(AMDGPU::getAMDGPUAS(T)), ASAliasRules(AS) {}
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AMDGPUAAResult(AMDGPUAAResult &&Arg)
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: AAResultBase(std::move(Arg)), DL(Arg.DL), AS(Arg.AS),
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ASAliasRules(Arg.ASAliasRules){}
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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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class ASAliasRulesTy {
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public:
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ASAliasRulesTy(AMDGPUAS AS_);
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AliasResult getAliasResult(unsigned AS1, unsigned AS2) const;
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private:
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AMDGPUAS AS;
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const AliasResult (*ASAliasRules)[6][6];
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} ASAliasRules;
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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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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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}
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#endif // LLVM_ANALYSIS_AMDGPUALIASANALYSIS_H
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