mirror of
https://github.com/openharmony/ark_ts2abc.git
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zhuoli72
c3a2e0b34e
Change-Id: I26f663c67b42f6549c7777a88c8bf00bd845fc96 Signed-off-by: zhuoli72 <pengzhuoli@huawei.com>
107 lines
3.8 KiB
C++
107 lines
3.8 KiB
C++
/**
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "asyncGeneratorFunctionBuilder.h"
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#include <compiler/base/catchTable.h>
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#include <compiler/core/pandagen.h>
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#include <ir/base/scriptFunction.h>
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namespace panda::es2panda::compiler {
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void AsyncGeneratorFunctionBuilder::Prepare(const ir::ScriptFunction *node) const
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{
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VReg callee = FunctionReg(node);
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pg_->CreateAsyncGeneratorObj(node, callee);
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pg_->StoreAccumulator(node, funcObj_);
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pg_->SuspendGenerator(node, funcObj_);
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pg_->SetLabel(node, catchTable_->LabelSet().TryBegin());
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}
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void AsyncGeneratorFunctionBuilder::CleanUp(const ir::ScriptFunction *node) const
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{
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const auto &labelSet = catchTable_->LabelSet();
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pg_->SetLabel(node, labelSet.TryEnd());
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pg_->SetLabel(node, labelSet.CatchBegin());
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pg_->AsyncGeneratorReject(node, funcObj_);
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pg_->EmitReturn(node);
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pg_->SetLabel(node, labelSet.CatchEnd());
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}
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void AsyncGeneratorFunctionBuilder::DirectReturn(const ir::AstNode *node) const
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{
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pg_->AsyncGeneratorResolve(node, funcObj_);
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pg_->EmitReturn(node);
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}
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void AsyncGeneratorFunctionBuilder::ImplicitReturn(const ir::AstNode *node) const
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{
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pg_->LoadConst(node, Constant::JS_UNDEFINED);
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DirectReturn(node);
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}
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void AsyncGeneratorFunctionBuilder::Yield(const ir::AstNode *node)
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{
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Await(node);
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RegScope rs(pg_);
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VReg completionType = pg_->AllocReg();
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VReg completionValue = pg_->AllocReg();
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AsyncYield(node, completionType, completionValue);
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auto *notReturnCompletion = pg_->AllocLabel();
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auto *normalCompletion = pg_->AllocLabel();
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auto *notThrowCompletion = pg_->AllocLabel();
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// 27.6.3.8.8.a. If resumptionValue.[[Type]] is not return
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pg_->LoadAccumulatorInt(node, static_cast<int32_t>(ResumeMode::RETURN));
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pg_->Condition(node, lexer::TokenType::PUNCTUATOR_EQUAL, completionType, notReturnCompletion);
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// 27.6.3.8.8.b. Let awaited be Await(resumptionValue.[[Value]]).
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pg_->LoadAccumulator(node, completionValue);
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pg_->AsyncFunctionAwait(node, funcObj_);
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SuspendResumeExecution(node, completionType, completionValue);
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// 27.6.3.8.8.c. If awaited.[[Type]] is throw, return Completion(awaited).
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pg_->LoadAccumulatorInt(node, static_cast<int32_t>(ResumeMode::THROW));
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pg_->Condition(node, lexer::TokenType::PUNCTUATOR_EQUAL, completionType, normalCompletion);
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pg_->LoadAccumulator(node, completionValue);
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pg_->EmitThrow(node);
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pg_->SetLabel(node, normalCompletion);
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// 27.6.3.8.8.d. Assert: awaited.[[Type]] is normal.
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// 27.6.3.8.8.e. Return Completion { [[Type]]: return, [[Value]]: awaited.[[Value]], [[Target]]: empty }.
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pg_->ControlFlowChangeBreak();
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pg_->LoadAccumulator(node, completionValue);
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pg_->DirectReturn(node);
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pg_->SetLabel(node, notReturnCompletion);
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// 27.6.3.8.8.a. return Completion(resumptionValue).
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pg_->LoadAccumulatorInt(node, static_cast<int32_t>(ResumeMode::THROW));
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pg_->Condition(node, lexer::TokenType::PUNCTUATOR_EQUAL, completionType, notThrowCompletion);
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pg_->LoadAccumulator(node, completionValue);
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pg_->EmitThrow(node);
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pg_->SetLabel(node, notThrowCompletion);
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pg_->LoadAccumulator(node, completionValue);
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}
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IteratorType AsyncGeneratorFunctionBuilder::GeneratorKind() const
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{
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return IteratorType::ASYNC;
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}
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} // namespace panda::es2panda::compiler
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