mirror of
https://github.com/Samsung/escargot.git
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82 lines
3.2 KiB
C++
82 lines
3.2 KiB
C++
/*
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* Copyright (c) 2016-present Samsung Electronics Co., Ltd
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*/
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#ifndef UpdateExpressionDecrementPostfixNode_h
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#define UpdateExpressionDecrementPostfixNode_h
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#include "ExpressionNode.h"
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namespace Escargot {
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class UpdateExpressionDecrementPostfixNode : public ExpressionNode {
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public:
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UpdateExpressionDecrementPostfixNode(Node* argument)
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: ExpressionNode()
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, m_argument(argument)
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{
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}
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virtual ASTNodeType type() override { return ASTNodeType::UpdateExpressionDecrementPostfix; }
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virtual void generateExpressionByteCode(ByteCodeBlock* codeBlock, ByteCodeGenerateContext* context, ByteCodeRegisterIndex dstRegister) override
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{
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m_argument->generateResolveAddressByteCode(codeBlock, context);
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m_argument->generateReferenceResolvedAddressByteCode(codeBlock, context);
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size_t srcIndex = context->getLastRegisterIndex();
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size_t storeIndex = m_argument->getRegister(codeBlock, context);
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codeBlock->pushCode(ToNumericDecrement(ByteCodeLOC(m_loc.index), srcIndex, storeIndex, dstRegister), context, this);
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context->giveUpRegister();
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context->giveUpRegister();
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m_argument->generateStoreByteCode(codeBlock, context, storeIndex, false);
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}
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virtual void iterateChildrenIdentifier(const std::function<void(AtomicString name, bool isAssignment)>& fn) override
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{
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m_argument->iterateChildrenIdentifierAssigmentCase(fn);
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}
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virtual void iterateChildren(const std::function<void(Node* node)>& fn) override
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{
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fn(this);
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m_argument->iterateChildren(fn);
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}
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virtual void generateResultNotRequiredExpressionByteCode(ByteCodeBlock* codeBlock, ByteCodeGenerateContext* context) override
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{
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if (m_argument->isIdentifier()) {
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auto r = m_argument->asIdentifier()->isAllocatedOnStack(context);
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if (std::get<0>(r)) {
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codeBlock->pushCode(Decrement(ByteCodeLOC(m_loc.index), std::get<1>(r), std::get<1>(r)), context, this);
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return;
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}
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}
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size_t src = m_argument->getRegister(codeBlock, context);
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m_argument->generateExpressionByteCode(codeBlock, context, src);
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context->giveUpRegister();
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size_t dst = m_argument->getRegister(codeBlock, context);
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codeBlock->pushCode(Decrement(ByteCodeLOC(m_loc.index), src, dst), context, this);
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m_argument->generateStoreByteCode(codeBlock, context, dst, true);
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context->giveUpRegister();
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}
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private:
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Node* m_argument;
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};
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} // namespace Escargot
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#endif
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