1/*
2 * Copyright (c) 2021 - 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "generatorFunctionBuilder.h"
17
18#include "compiler/core/pandagen.h"
19#include "compiler/base/catchTable.h"
20#include "ir/base/scriptFunction.h"
21
22namespace ark::es2panda::compiler {
23void GeneratorFunctionBuilder::Prepare(const ir::ScriptFunction *node) const
24{
25    VReg callee = FunctionReg(node);
26
27    pg_->CreateGeneratorObj(node, callee);
28    pg_->StoreAccumulator(node, funcObj_);
29    pg_->SuspendGenerator(node, funcObj_);
30    pg_->SetLabel(node, catchTable_->LabelSet().TryBegin());
31}
32
33void GeneratorFunctionBuilder::CleanUp(const ir::ScriptFunction *node) const
34{
35    const auto &labelSet = catchTable_->LabelSet();
36
37    pg_->SetLabel(node, labelSet.TryEnd());
38    pg_->SetLabel(node, labelSet.CatchBegin());
39    pg_->GeneratorComplete(node, funcObj_);
40    pg_->EmitThrow(node);
41    pg_->SetLabel(node, labelSet.CatchEnd());
42}
43
44void GeneratorFunctionBuilder::DirectReturn(const ir::AstNode *node) const
45{
46    pg_->GeneratorComplete(node, funcObj_);
47    pg_->CreateIterResultObject(node, true);
48    pg_->EmitReturn(node);
49}
50
51void GeneratorFunctionBuilder::ImplicitReturn(const ir::AstNode *node) const
52{
53    pg_->LoadConst(node, Constant::JS_UNDEFINED);
54    DirectReturn(node);
55}
56
57void GeneratorFunctionBuilder::Yield(const ir::AstNode *node)
58{
59    RegScope rs(pg_);
60    VReg completionType = pg_->AllocReg();
61    VReg completionValue = pg_->AllocReg();
62
63    pg_->CreateIterResultObject(node, false);
64    pg_->GeneratorYield(node, funcObj_);
65    SuspendResumeExecution(node, completionType, completionValue);
66
67    HandleCompletion(node, completionType, completionValue);
68}
69}  // namespace ark::es2panda::compiler
70