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06a0a23562
This adds an analysis to the compiler that identifies types that are may store
to memory on destruction.
It adds a compiler known protocol _DestructorSafeContainer that allows the
standard library to identify containers whose destructor's memory effects
depends strictly on the type parameters of the container.
Array<T> : _DestructorSafeContainer {} may not store to memory during
destruction if the bound T is a type that does not store to memory on
destruction.
This is needed to deduce that for example Array<Array<Int>> is does not store to
memory on destruction (e.g during a call to release).
rdar://18940376
Swift SVN r23242
43 lines
1.3 KiB
C++
43 lines
1.3 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 - 2015 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 http://swift.org/LICENSE.txt for license information
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// See http://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_SILANALYSIS_DESTRUCTORANALYSIS_H
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#define SWIFT_SILANALYSIS_DESTRUCTORANALYSIS_H
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#include "swift/SIL/SILValue.h"
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#include "swift/SILAnalysis/Analysis.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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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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protected:
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bool isSafeType(Type);
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bool implementsDestructorSafeContainerProtocol(NominalTypeDecl *);
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bool areTypeParametersSafe(CanType);
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ASTContext &getASTContext();
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};
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}
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#endif
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