1 /*
2 * Copyright (c) 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 "label_creation.h"
17 #include "cg.h"
18
19 namespace maplebe {
20 using namespace maple;
21
Run() const22 void LabelCreation::Run() const
23 {
24 CreateStartEndLabel();
25 }
26
CreateStartEndLabel() const27 void LabelCreation::CreateStartEndLabel() const
28 {
29 DEBUG_ASSERT(cgFunc != nullptr, "expect a cgfunc before CreateStartEndLabel");
30 MIRBuilder *mirBuilder = cgFunc->GetFunction().GetModule()->GetMIRBuilder();
31 DEBUG_ASSERT(mirBuilder != nullptr, "get mirbuilder failed in CreateStartEndLabel");
32 /* create start label */
33 LabelIdx startLblIdx = cgFunc->CreateLabel();
34 LabelNode *startLabel = mirBuilder->CreateStmtLabel(startLblIdx);
35 cgFunc->GetFunction().GetBody()->InsertFirst(startLabel);
36 /* creat return label */
37 LabelIdx returnLblIdx = cgFunc->CreateLabel();
38 LabelNode *returnLabel = mirBuilder->CreateStmtLabel(returnLblIdx);
39 cgFunc->GetFunction().GetBody()->InsertLast(returnLabel);
40
41 /* create end label */
42 LabelIdx endLblIdx = cgFunc->CreateLabel();
43 LabelNode *endLabel = mirBuilder->CreateStmtLabel(endLblIdx);
44 cgFunc->SetEndLabel(*endLabel);
45 cgFunc->GetFunction().GetBody()->InsertLast(endLabel);
46 DEBUG_ASSERT(cgFunc->GetFunction().GetBody()->GetLast() == endLabel, "last stmt must be a endLabel");
47
48 /* create function's low/high pc if dwarf enabled */
49 MIRFunction *func = &cgFunc->GetFunction();
50 /* add start/end labels into the static map table in class cg */
51 if (!CG::IsInFuncWrapLabels(func)) {
52 CG::SetFuncWrapLabels(func, std::make_pair(startLblIdx, endLblIdx));
53 }
54 }
55
PhaseRun(maplebe::CGFunc & f)56 bool CgCreateLabel::PhaseRun(maplebe::CGFunc &f)
57 {
58 MemPool *memPool = GetPhaseMemPool();
59 LabelCreation *labelCreate = memPool->New<LabelCreation>(f);
60 labelCreate->Run();
61 return false;
62 }
63 } /* namespace maplebe */
64