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Use the existing begin and end symbol for debug info.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231338 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2015-03-05 02:05:42 +00:00
parent 9e112cc561
commit 304fe62b74
13 changed files with 21 additions and 29 deletions
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23
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@@ -207,7 +207,6 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
DwarfLineSectionSym = nullptr;
DwarfAddrSectionSym = nullptr;
DwarfAbbrevDWOSectionSym = DwarfStrDWOSectionSym = nullptr;
FunctionBeginSym = FunctionEndSym = nullptr;
CurFn = nullptr;
CurMI = nullptr;
@@ -855,7 +854,7 @@ DwarfDebug::buildLocationList(SmallVectorImpl<DebugLocEntry> &DebugLoc,
if (End != nullptr)
EndLabel = getLabelAfterInsn(End);
else if (std::next(I) == Ranges.end())
EndLabel = FunctionEndSym;
EndLabel = Asm->getFunctionEnd();
else
EndLabel = getLabelBeforeInsn(std::next(I)->first);
assert(EndLabel && "Forgot label after instruction ending a range!");
@@ -1146,11 +1145,6 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
else
Asm->OutStreamer.getContext().setDwarfCompileUnitID(TheCU->getUniqueID());
// Emit a label for the function so that we have a beginning address.
FunctionBeginSym = Asm->GetTempSymbol("func_begin", Asm->getFunctionNumber());
// Assumes in correct section after the entry point.
Asm->OutStreamer.EmitLabel(FunctionBeginSym);
// Calculate history for local variables.
calculateDbgValueHistory(MF, Asm->MF->getSubtarget().getRegisterInfo(),
DbgValues);
@@ -1161,12 +1155,12 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
if (Ranges.empty())
continue;
// The first mention of a function argument gets the FunctionBeginSym
// The first mention of a function argument gets the CurrentFnBegin
// label, so arguments are visible when breaking at function entry.
DIVariable DIVar(Ranges.front().first->getDebugVariable());
if (DIVar.isVariable() && DIVar.getTag() == dwarf::DW_TAG_arg_variable &&
getDISubprogram(DIVar.getContext()).describes(MF->getFunction())) {
LabelsBeforeInsn[Ranges.front().first] = FunctionBeginSym;
LabelsBeforeInsn[Ranges.front().first] = Asm->getFunctionBegin();
if (Ranges.front().first->getDebugExpression().isBitPiece()) {
// Mark all non-overlapping initial pieces.
for (auto I = Ranges.begin(); I != Ranges.end(); ++I) {
@@ -1175,7 +1169,7 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
[&](DbgValueHistoryMap::InstrRange Pred) {
return !piecesOverlap(Piece, Pred.first->getDebugExpression());
}))
LabelsBeforeInsn[I->first] = FunctionBeginSym;
LabelsBeforeInsn[I->first] = Asm->getFunctionBegin();
else
break;
}
@@ -1190,7 +1184,7 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
}
PrevInstLoc = DebugLoc();
PrevLabel = FunctionBeginSym;
PrevLabel = Asm->getFunctionBegin();
// Record beginning of function.
PrologEndLoc = findPrologueEndLoc(MF);
@@ -1221,11 +1215,6 @@ void DwarfDebug::endFunction(const MachineFunction *MF) {
return;
}
// Define end label for subprogram.
FunctionEndSym = Asm->GetTempSymbol("func_end", Asm->getFunctionNumber());
// Assumes in correct section after the entry point.
Asm->OutStreamer.EmitLabel(FunctionEndSym);
// Set DwarfDwarfCompileUnitID in MCContext to default value.
Asm->OutStreamer.getContext().setDwarfCompileUnitID(0);
@@ -1237,7 +1226,7 @@ void DwarfDebug::endFunction(const MachineFunction *MF) {
collectVariableInfo(TheCU, SP, ProcessedVars);
// Add the range of this function to the list of ranges for the CU.
TheCU.addRange(RangeSpan(FunctionBeginSym, FunctionEndSym));
TheCU.addRange(RangeSpan(Asm->getFunctionBegin(), Asm->getFunctionEnd()));
// Under -gmlt, skip building the subprogram if there are no inlined
// subroutines inside it.