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6150530377
This was originally a pointer to support pass managers which didn't use AnalysisManagers. However, that doesn't realistically come up much and the complexity of supporting it doesn't really make sense. In fact, *many* parts of the pass manager were just assuming the pointer was never null already. This at least makes it much more explicit and clear. llvm-svn: 263219
86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
//===- ScopedNoAliasAA.h - Scoped No-Alias Alias Analysis -------*- 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 metadata-based scoped no-alias analysis.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_SCOPEDNOALIASAA_H
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#define LLVM_ANALYSIS_SCOPEDNOALIASAA_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/Metadata.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 which uses scoped-noalias metadata to answer queries.
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class ScopedNoAliasAAResult : public AAResultBase<ScopedNoAliasAAResult> {
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friend AAResultBase<ScopedNoAliasAAResult>;
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public:
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explicit ScopedNoAliasAAResult() : AAResultBase() {}
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ScopedNoAliasAAResult(ScopedNoAliasAAResult &&Arg)
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: AAResultBase(std::move(Arg)) {}
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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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ModRefInfo getModRefInfo(ImmutableCallSite CS, const MemoryLocation &Loc);
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ModRefInfo getModRefInfo(ImmutableCallSite CS1, ImmutableCallSite CS2);
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private:
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bool mayAliasInScopes(const MDNode *Scopes, const MDNode *NoAlias) const;
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void collectMDInDomain(const MDNode *List, const MDNode *Domain,
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SmallPtrSetImpl<const MDNode *> &Nodes) const;
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};
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/// Analysis pass providing a never-invalidated alias analysis result.
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class ScopedNoAliasAA : public AnalysisInfoMixin<ScopedNoAliasAA> {
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friend AnalysisInfoMixin<ScopedNoAliasAA>;
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static char PassID;
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public:
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typedef ScopedNoAliasAAResult Result;
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ScopedNoAliasAAResult run(Function &F, AnalysisManager<Function> &AM);
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};
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/// Legacy wrapper pass to provide the ScopedNoAliasAAResult object.
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class ScopedNoAliasAAWrapperPass : public ImmutablePass {
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std::unique_ptr<ScopedNoAliasAAResult> Result;
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public:
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static char ID;
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ScopedNoAliasAAWrapperPass();
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ScopedNoAliasAAResult &getResult() { return *Result; }
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const ScopedNoAliasAAResult &getResult() const { return *Result; }
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bool doInitialization(Module &M) override;
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bool doFinalization(Module &M) override;
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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};
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//===--------------------------------------------------------------------===//
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//
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// createScopedNoAliasAAWrapperPass - This pass implements metadata-based
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// scoped noalias analysis.
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//
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ImmutablePass *createScopedNoAliasAAWrapperPass();
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}
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#endif
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