78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
//===- ScalarEvolutionAliasAnalysis.h - SCEV-based AA -----------*- 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 interface for a SCEV-based alias analysis.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_SCALAREVOLUTIONALIASANALYSIS_H
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#define LLVM_ANALYSIS_SCALAREVOLUTIONALIASANALYSIS_H
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#include "llvm/Analysis/AliasAnalysis.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/Compiler.h"
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namespace llvm {
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class Function;
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class ScalarEvolution;
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class SCEV;
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/// A simple alias analysis implementation that uses ScalarEvolution to answer
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/// queries.
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class SCEVAAResult : public AAResultBase {
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ScalarEvolution &SE;
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public:
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explicit SCEVAAResult(ScalarEvolution &SE) : SE(SE) {}
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SCEVAAResult(SCEVAAResult &&Arg) : AAResultBase(std::move(Arg)), SE(Arg.SE) {}
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LLVM_ABI AliasResult alias(const MemoryLocation &LocA,
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const MemoryLocation &LocB, AAQueryInfo &AAQI,
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const Instruction *CtxI);
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LLVM_ABI bool invalidate(Function &F, const PreservedAnalyses &PA,
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FunctionAnalysisManager::Invalidator &Inv);
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private:
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Value *GetBaseValue(const SCEV *S);
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};
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/// Analysis pass providing a never-invalidated alias analysis result.
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class SCEVAA : public AnalysisInfoMixin<SCEVAA> {
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friend AnalysisInfoMixin<SCEVAA>;
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LLVM_ABI static AnalysisKey Key;
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public:
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typedef SCEVAAResult Result;
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LLVM_ABI SCEVAAResult run(Function &F, FunctionAnalysisManager &AM);
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};
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/// Legacy wrapper pass to provide the SCEVAAResult object.
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class LLVM_ABI SCEVAAWrapperPass : public FunctionPass {
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std::unique_ptr<SCEVAAResult> Result;
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public:
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static char ID;
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SCEVAAWrapperPass();
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SCEVAAResult &getResult() { return *Result; }
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const SCEVAAResult &getResult() const { return *Result; }
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bool runOnFunction(Function &F) override;
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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};
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/// Creates an instance of \c SCEVAAWrapperPass.
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LLVM_ABI FunctionPass *createSCEVAAWrapperPass();
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}
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#endif
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