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ab3f77baf2
introduce a common superclass, SILNode. This is in preparation for allowing instructions to have multiple results. It is also a somewhat more elegant representation for instructions that have zero results. Instructions that are known to have exactly one result inherit from a class, SingleValueInstruction, that subclasses both ValueBase and SILInstruction. Some care must be taken when working with SILNode pointers and testing for equality; please see the comment on SILNode for more information. A number of SIL passes needed to be updated in order to handle this new distinction between SIL values and SIL instructions. Note that the SIL parser is now stricter about not trying to assign a result value from an instruction (like 'return' or 'strong_retain') that does not produce any.
44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
//===--- ValueOwnershipKindClassifier.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_SIL_VALUEOWNERSHIPKINDCLASSIFIER_H
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#define SWIFT_SIL_VALUEOWNERSHIPKINDCLASSIFIER_H
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#include "swift/SIL/SILVisitor.h"
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namespace swift {
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namespace sil {
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class ValueOwnershipKindClassifier
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: public SILValueVisitor<ValueOwnershipKindClassifier, ValueOwnershipKind> {
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public:
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ValueOwnershipKindClassifier() = default;
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~ValueOwnershipKindClassifier() = default;
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ValueOwnershipKindClassifier(const ValueOwnershipKindClassifier &) = delete;
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ValueOwnershipKindClassifier(ValueOwnershipKindClassifier &&) = delete;
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ValueOwnershipKind visitForwardingInst(SILInstruction *I,
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ArrayRef<Operand> Ops);
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ValueOwnershipKind visitForwardingInst(SILInstruction *I) {
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return visitForwardingInst(I, I->getAllOperands());
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}
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#define VALUE(Id, Parent) ValueOwnershipKind visit##Id(Id *ID);
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#include "swift/SIL/SILNodes.def"
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};
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} // end namespace sil
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} // end namespace swift
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#endif
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