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68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
//===--- DestructorAnalysis.h -----------------------------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SILOPTIMIZER_ANALYSIS_DESTRUCTORANALYSIS_H
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#define SWIFT_SILOPTIMIZER_ANALYSIS_DESTRUCTORANALYSIS_H
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#include "swift/SIL/SILValue.h"
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#include "swift/SILOptimizer/Analysis/Analysis.h"
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#include "llvm/ADT/DenseMap.h"
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namespace swift {
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/// This analysis determines memory effects during destruction.
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class DestructorAnalysis : public SILAnalysis {
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SILModule *Mod;
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llvm::DenseMap<CanType, bool> Cached;
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public:
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DestructorAnalysis(SILModule *M)
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: SILAnalysis(AnalysisKind::Destructor), Mod(M) {}
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static bool classof(const SILAnalysis *S) {
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return S->getKind() == AnalysisKind::Destructor;
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}
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/// Returns true if destruction of T may store to memory.
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bool mayStoreToMemoryOnDestruction(SILType T);
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/// No invalidation is needed.
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virtual void invalidate() override {
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// Nothing can invalidate, because types are static and cannot be changed
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// during the SIL pass pipeline.
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}
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/// No invalidation is needed.
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virtual void invalidate(SILFunction *F, InvalidationKind K) override {
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// Nothing can invalidate, because types are static and cannot be changed
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// during the SIL pass pipeline.
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}
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/// Notify the analysis about a newly created function.
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virtual void notifyAddFunction(SILFunction *F) override { }
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/// Notify the analysis about a function which will be deleted from the
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/// module.
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virtual void notifyDeleteFunction(SILFunction *F) override { }
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/// Notify the analysis about changed witness or vtables.
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virtual void invalidateFunctionTables() override { }
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protected:
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bool cacheResult(CanType Type, bool Result);
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bool isSafeType(CanType Ty);
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bool implementsDestructorSafeContainerProtocol(NominalTypeDecl *NomDecl);
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bool areTypeParametersSafe(CanType Ty);
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ASTContext &getASTContext();
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};
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}
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#endif
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