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11e71061b1
Besides a general consistently benefit, the extra layer of indirection allows the mechanical part of https://reviews.llvm.org/D23256 that requires touching every transformation and analysis to be factored out cleanly. Thanks to David for the suggestion. llvm-svn: 278077
73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
//===- ScalarEvolutionAliasAnalysis.h - SCEV-based AA -----------*- 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 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/Analysis/ScalarEvolutionExpressions.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 alias analysis implementation that uses ScalarEvolution to answer
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/// queries.
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class SCEVAAResult : public AAResultBase<SCEVAAResult> {
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ScalarEvolution &SE;
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public:
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explicit SCEVAAResult(ScalarEvolution &SE) : AAResultBase(), SE(SE) {}
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SCEVAAResult(SCEVAAResult &&Arg) : AAResultBase(std::move(Arg)), SE(Arg.SE) {}
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AliasResult alias(const MemoryLocation &LocA, const MemoryLocation &LocB);
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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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static char PassID;
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public:
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typedef SCEVAAResult Result;
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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 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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FunctionPass *createSCEVAAWrapperPass();
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}
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#endif
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