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c2b2e52260
Also fixed a small bug related to how we handle arguments. We were not clearing the state of the argument when we saw a potential decrement of the argument. <rdar://problem/17013194> Swift SVN r18706
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
//===--------------- ARCAnalysis.h - SIL ARC Analysis ----*- 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_ARCANALYSIS_H
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#define SWIFT_SILANALYSIS_ARCANALYSIS_H
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#include "swift/SIL/SILValue.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SetVector.h"
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namespace swift {
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class SILValue;
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class SILInstruction;
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class AliasAnalysis;
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class SILFunction;
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} // end namespace swift
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namespace swift {
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namespace arc {
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/// \returns True if the user \p User decrement the ref count of pointer \p Ptr.
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bool canDecrementRefCount(SILInstruction *User, SILValue Ptr,AliasAnalysis *AA);
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/// \returns True if the user \p User can use the pointer \p Ptr in a manner
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/// that requires \p Ptr to be alive before Inst.
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bool canUseValue(SILInstruction *User, SILValue Ptr, AliasAnalysis *AA);
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/// A set of matching reference count increments, decrements, increment
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/// insertion pts, and decrement insertion pts.
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struct ARCMatchingSet {
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SILValue Ptr;
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llvm::SetVector<SILInstruction *> Increments;
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llvm::SetVector<SILInstruction *> IncrementInsertPts;
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llvm::SetVector<SILInstruction *> Decrements;
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llvm::SetVector<SILInstruction *> DecrementInsertPts;
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void clear() {
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Ptr = SILValue();
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Increments.clear();
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IncrementInsertPts.clear();
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Decrements.clear();
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DecrementInsertPts.clear();
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}
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};
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bool computeARCMatchingSet(SILFunction &F, AliasAnalysis *AA,
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std::function<void (ARCMatchingSet&)> Fun);
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} // end namespace arc
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} // end namespace swift
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#endif
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