1 //===- ScopedNoAliasAA.h - Scoped No-Alias Alias Analysis -------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 /// This is the interface for a metadata-based scoped no-alias analysis.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_ANALYSIS_SCOPEDNOALIASAA_H
15 #define LLVM_ANALYSIS_SCOPEDNOALIASAA_H
17 #include "llvm/Analysis/AliasAnalysis.h"
18 #include "llvm/IR/Function.h"
19 #include "llvm/IR/Metadata.h"
20 #include "llvm/IR/Module.h"
21 #include "llvm/Pass.h"
25 /// A simple AA result which uses scoped-noalias metadata to answer queries.
26 class ScopedNoAliasAAResult : public AAResultBase<ScopedNoAliasAAResult> {
27 friend AAResultBase<ScopedNoAliasAAResult>;
30 explicit ScopedNoAliasAAResult() : AAResultBase() {}
31 ScopedNoAliasAAResult(ScopedNoAliasAAResult &&Arg)
32 : AAResultBase(std::move(Arg)) {}
34 /// Handle invalidation events from the new pass manager.
36 /// By definition, this result is stateless and so remains valid.
37 bool invalidate(Function &, const PreservedAnalyses &) { return false; }
39 AliasResult alias(const MemoryLocation &LocA, const MemoryLocation &LocB);
40 ModRefInfo getModRefInfo(ImmutableCallSite CS, const MemoryLocation &Loc);
41 ModRefInfo getModRefInfo(ImmutableCallSite CS1, ImmutableCallSite CS2);
44 bool mayAliasInScopes(const MDNode *Scopes, const MDNode *NoAlias) const;
45 void collectMDInDomain(const MDNode *List, const MDNode *Domain,
46 SmallPtrSetImpl<const MDNode *> &Nodes) const;
49 /// Analysis pass providing a never-invalidated alias analysis result.
50 class ScopedNoAliasAA : public AnalysisInfoMixin<ScopedNoAliasAA> {
51 friend AnalysisInfoMixin<ScopedNoAliasAA>;
55 typedef ScopedNoAliasAAResult Result;
57 ScopedNoAliasAAResult run(Function &F, AnalysisManager<Function> &AM);
60 /// Legacy wrapper pass to provide the ScopedNoAliasAAResult object.
61 class ScopedNoAliasAAWrapperPass : public ImmutablePass {
62 std::unique_ptr<ScopedNoAliasAAResult> Result;
67 ScopedNoAliasAAWrapperPass();
69 ScopedNoAliasAAResult &getResult() { return *Result; }
70 const ScopedNoAliasAAResult &getResult() const { return *Result; }
72 bool doInitialization(Module &M) override;
73 bool doFinalization(Module &M) override;
74 void getAnalysisUsage(AnalysisUsage &AU) const override;
77 //===--------------------------------------------------------------------===//
79 // createScopedNoAliasAAWrapperPass - This pass implements metadata-based
80 // scoped noalias analysis.
82 ImmutablePass *createScopedNoAliasAAWrapperPass();