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 "cgfunc.h"
18 #include "cg.h"
19 #include "debug_info.h"
20
21 namespace maplebe {
22 using namespace maple;
23
Run()24 void LabelCreation::Run()
25 {
26 CreateStartEndLabel();
27 }
28
CreateStartEndLabel()29 void LabelCreation::CreateStartEndLabel()
30 {
31 DEBUG_ASSERT(cgFunc != nullptr, "expect a cgfunc before CreateStartEndLabel");
32 LabelIdx startLblIdx = cgFunc->CreateLabel();
33 MIRBuilder *mirBuilder = cgFunc->GetFunction().GetModule()->GetMIRBuilder();
34 DEBUG_ASSERT(mirBuilder != nullptr, "get mirbuilder failed in CreateStartEndLabel");
35 LabelNode *startLabel = mirBuilder->CreateStmtLabel(startLblIdx);
36 cgFunc->SetStartLabel(*startLabel);
37 cgFunc->GetFunction().GetBody()->InsertFirst(startLabel);
38 LabelIdx endLblIdx = cgFunc->CreateLabel();
39 LabelNode *endLabel = mirBuilder->CreateStmtLabel(endLblIdx);
40 cgFunc->SetEndLabel(*endLabel);
41 cgFunc->GetFunction().GetBody()->InsertLast(endLabel);
42 DEBUG_ASSERT(cgFunc->GetFunction().GetBody()->GetLast() == endLabel, "last stmt must be a endLabel");
43 MIRFunction *func = &cgFunc->GetFunction();
44 CG *cg = cgFunc->GetCG();
45 if (cg->GetCGOptions().WithDwarf()) {
46 DebugInfo *di = cg->GetMIRModule()->GetDbgInfo();
47 DBGDie *fdie = di->GetDie(func);
48 fdie->SetAttr(DW_AT_low_pc, startLblIdx);
49 fdie->SetAttr(DW_AT_high_pc, endLblIdx);
50 }
51 /* add start/end labels into the static map table in class cg */
52 if (!CG::IsInFuncWrapLabels(func)) {
53 CG::SetFuncWrapLabels(func, std::make_pair(startLblIdx, endLblIdx));
54 }
55 }
56
PhaseRun(maplebe::CGFunc & f)57 bool CgCreateLabel::PhaseRun(maplebe::CGFunc &f)
58 {
59 MemPool *memPool = GetPhaseMemPool();
60 LabelCreation *labelCreate = memPool->New<LabelCreation>(f);
61 labelCreate->Run();
62 return false;
63 }
64 } /* namespace maplebe */
65