91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
|
//===- ScopedNoAliasAA.h - Scoped No-Alias Alias Analysis -------*- C++ -*-===//
|
||
|
|
//
|
||
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
/// \file
|
||
|
|
/// This is the interface for a metadata-based scoped no-alias analysis.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#ifndef LLVM_ANALYSIS_SCOPEDNOALIASAA_H
|
||
|
|
#define LLVM_ANALYSIS_SCOPEDNOALIASAA_H
|
||
|
|
|
||
|
|
#include "llvm/Analysis/AliasAnalysis.h"
|
||
|
|
#include "llvm/IR/PassManager.h"
|
||
|
|
#include "llvm/Pass.h"
|
||
|
|
#include <memory>
|
||
|
|
|
||
|
|
namespace llvm {
|
||
|
|
|
||
|
|
class Function;
|
||
|
|
class MDNode;
|
||
|
|
class MemoryLocation;
|
||
|
|
|
||
|
|
/// A simple AA result which uses scoped-noalias metadata to answer queries.
|
||
|
|
class ScopedNoAliasAAResult : public AAResultBase<ScopedNoAliasAAResult> {
|
||
|
|
friend AAResultBase<ScopedNoAliasAAResult>;
|
||
|
|
|
||
|
|
public:
|
||
|
|
/// Handle invalidation events from the new pass manager.
|
||
|
|
///
|
||
|
|
/// By definition, this result is stateless and so remains valid.
|
||
|
|
bool invalidate(Function &, const PreservedAnalyses &,
|
||
|
|
FunctionAnalysisManager::Invalidator &) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
AliasResult alias(const MemoryLocation &LocA, const MemoryLocation &LocB,
|
||
|
|
AAQueryInfo &AAQI);
|
||
|
|
ModRefInfo getModRefInfo(const CallBase *Call, const MemoryLocation &Loc,
|
||
|
|
AAQueryInfo &AAQI);
|
||
|
|
ModRefInfo getModRefInfo(const CallBase *Call1, const CallBase *Call2,
|
||
|
|
AAQueryInfo &AAQI);
|
||
|
|
|
||
|
|
private:
|
||
|
|
bool mayAliasInScopes(const MDNode *Scopes, const MDNode *NoAlias) const;
|
||
|
|
};
|
||
|
|
|
||
|
|
/// Analysis pass providing a never-invalidated alias analysis result.
|
||
|
|
class ScopedNoAliasAA : public AnalysisInfoMixin<ScopedNoAliasAA> {
|
||
|
|
friend AnalysisInfoMixin<ScopedNoAliasAA>;
|
||
|
|
|
||
|
|
static AnalysisKey Key;
|
||
|
|
|
||
|
|
public:
|
||
|
|
using Result = ScopedNoAliasAAResult;
|
||
|
|
|
||
|
|
ScopedNoAliasAAResult run(Function &F, FunctionAnalysisManager &AM);
|
||
|
|
};
|
||
|
|
|
||
|
|
/// Legacy wrapper pass to provide the ScopedNoAliasAAResult object.
|
||
|
|
class ScopedNoAliasAAWrapperPass : public ImmutablePass {
|
||
|
|
std::unique_ptr<ScopedNoAliasAAResult> Result;
|
||
|
|
|
||
|
|
public:
|
||
|
|
static char ID;
|
||
|
|
|
||
|
|
ScopedNoAliasAAWrapperPass();
|
||
|
|
|
||
|
|
ScopedNoAliasAAResult &getResult() { return *Result; }
|
||
|
|
const ScopedNoAliasAAResult &getResult() const { return *Result; }
|
||
|
|
|
||
|
|
bool doInitialization(Module &M) override;
|
||
|
|
bool doFinalization(Module &M) override;
|
||
|
|
void getAnalysisUsage(AnalysisUsage &AU) const override;
|
||
|
|
};
|
||
|
|
|
||
|
|
//===--------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// createScopedNoAliasAAWrapperPass - This pass implements metadata-based
|
||
|
|
// scoped noalias analysis.
|
||
|
|
//
|
||
|
|
ImmutablePass *createScopedNoAliasAAWrapperPass();
|
||
|
|
|
||
|
|
} // end namespace llvm
|
||
|
|
|
||
|
|
#endif // LLVM_ANALYSIS_SCOPEDNOALIASAA_H
|