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7e15f0a557
take a const ValueBase* instead of a SILValue, implement SILArgument cases for a few visitors and opt others out explicitly, and assert that classes in the SIL value hierarchy override their superclass's classof. Swift SVN r4705
97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
//===--- SILVisitor.h - Defines the SILVisitor class -------------*- 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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//
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// This file defines the SILVisitor class, used for walking SIL code.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SIL_SILVISITOR_H
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#define SWIFT_SIL_SILVISITOR_H
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#include "swift/SIL/SILFunction.h"
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#include "swift/SIL/SILArgument.h"
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#include "llvm/Support/ErrorHandling.h"
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namespace swift {
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/// SILVisitor - This is a simple visitor class for Swift SIL nodes, allowing
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/// clients to walk over entire SIL functions, blocks, or instructions.
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template<typename ImplClass, typename ValueRetTy = void>
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class SILVisitor {
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public:
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#define VALUE(CLASS, PARENT) \
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case ValueKind::CLASS: \
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return static_cast<ImplClass*>(this) \
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->visit##CLASS(static_cast<CLASS*>(V));
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ValueRetTy visit(ValueBase *V) {
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switch (V->getKind()) {
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#include "swift/SIL/SILNodes.def"
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}
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llvm_unreachable("Not reachable, all cases handled");
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}
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ValueRetTy visit(SILValue V) {
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return visit(V.getDef());
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}
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// Define default dispatcher implementations chain to parent nodes.
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#define VALUE(CLASS, PARENT) \
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ValueRetTy visit##CLASS(CLASS *I) { \
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return static_cast<ImplClass*>(this)->visit##PARENT(I); \
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}
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#define ABSTRACT_VALUE(CLASS, PARENT) \
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ValueRetTy visit##CLASS(CLASS *I) { \
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return static_cast<ImplClass*>(this)->visit##PARENT(I); \
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}
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#include "swift/SIL/SILNodes.def"
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void visitSILBasicBlock(SILBasicBlock *BB) {
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for (auto argI = BB->bbarg_begin(), argEnd = BB->bbarg_end();
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argI != argEnd;
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++argI)
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visit(*argI);
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for (auto &I : *BB)
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visit(&I);
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}
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void visitSILBasicBlock(SILBasicBlock &BB) {
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this->ImplClass::visitSILBasicBlock(&BB);
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}
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void visitSILFunction(SILFunction *F) {
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for (auto &BB : *F)
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this->ImplClass::visitSILBasicBlock(&BB);
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}
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void visitSILFunction(SILFunction &F) {
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this->ImplClass::visitSILFunction(&F);
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}
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};
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/// A simple convenience class for a visitor that should only visit
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/// SIL instructions.
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template<typename ImplClass, typename ValueRetTy = void>
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class SILInstructionVisitor : public SILVisitor<ImplClass, ValueRetTy> {
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public:
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void visitSILArgument(SILArgument *A) {
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llvm_unreachable("should only be visiting instructions");
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}
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ValueRetTy visit(SILInstruction *I) {
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return SILVisitor<ImplClass, ValueRetTy>::visit(I);
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}
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};
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} // end namespace swift
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#endif
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