1 /**
2 * Copyright (c) 2021 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 "switchBuilder.h"
17
18 #include <ir/expression.h>
19 #include <ir/statements/switchStatement.h>
20 #include <ir/statements/switchCaseStatement.h>
21 #include <compiler/core/pandagen.h>
22 #include <compiler/core/labelTarget.h>
23 #include <typescript/checker.h>
24
25 namespace panda::es2panda::compiler {
26 // SwitchBuilder
27
SwitchBuilder(PandaGen * pg,const ir::SwitchStatement * stmt)28 SwitchBuilder::SwitchBuilder(PandaGen *pg, const ir::SwitchStatement *stmt)
29 : pg_(pg), end_(pg->AllocLabel()), labelCtx_(pg, LabelTarget(end_, LabelTarget::BREAK_LABEL)), stmt_(stmt)
30 {
31 for (size_t i = 0; i < stmt_->Cases().size(); i++) {
32 caseLabels_.push_back(pg_->AllocLabel());
33 }
34 }
35
~SwitchBuilder()36 SwitchBuilder::~SwitchBuilder()
37 {
38 pg_->SetLabel(stmt_, end_);
39 }
40
SetCaseTarget(uint32_t index)41 void SwitchBuilder::SetCaseTarget(uint32_t index)
42 {
43 pg_->SetLabel(stmt_->Cases()[index], caseLabels_[index]);
44 }
45
CompileTagOfSwitch(VReg tag)46 void SwitchBuilder::CompileTagOfSwitch(VReg tag)
47 {
48 stmt_->Discriminant()->Compile(pg_);
49 pg_->StoreAccumulator(stmt_->Discriminant(), tag);
50 }
51
CompileCaseStatements(uint32_t index)52 void SwitchBuilder::CompileCaseStatements(uint32_t index)
53 {
54 for (const auto *stmt : stmt_->Cases()[index]->Consequent()) {
55 stmt->Compile(pg_);
56 }
57 }
58
JumpIfCase(VReg tag,uint32_t index)59 void SwitchBuilder::JumpIfCase(VReg tag, uint32_t index)
60 {
61 const ir::SwitchCaseStatement *caseTarget = stmt_->Cases()[index];
62 caseTarget->Test()->Compile(pg_);
63 pg_->Condition(caseTarget, lexer::TokenType::PUNCTUATOR_NOT_STRICT_EQUAL, tag, caseLabels_[index]);
64 }
65
JumpToDefault(uint32_t defaultIndex)66 void SwitchBuilder::JumpToDefault(uint32_t defaultIndex)
67 {
68 const ir::SwitchCaseStatement *defaultTarget = stmt_->Cases()[defaultIndex];
69 pg_->Branch(defaultTarget, caseLabels_[defaultIndex]);
70 }
71
Break()72 void SwitchBuilder::Break()
73 {
74 pg_->Branch(stmt_, end_);
75 }
76 } // namespace panda::es2panda::compiler
77