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Simplify 

llvm-svn: 104338
This commit is contained in:
Devang Patel 2010-05-21 18:49:09 +00:00
parent 2b78565842
commit 1782aae355
1 changed files with 23 additions and 44 deletions
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67
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -2183,59 +2183,34 @@ void DwarfDebug::collectVariableInfo(const MachineFunction *MF) {
void DwarfDebug::beginScope(const MachineInstr *MI) {
// Check location.
DebugLoc DL = MI->getDebugLoc();
if (DL.isUnknown()) {
if (UnknownLocations) {
// This instruction has no debug location. If the preceding instruction
// did, emit debug location information to indicate that the debug
// location is now unknown.
MCSymbol *Label = NULL;
if (DL == PrevInstLoc)
Label = PrevLabel;
else {
Label = recordSourceLine(DL.getLine(), DL.getCol(), 0);
PrevInstLoc = DL;
PrevLabel = Label;
}
// If this instruction begins a scope then note down corresponding label
// even if previous label is reused.
if (InsnsBeginScopeSet.count(MI) != 0)
LabelsBeforeInsn[MI] = Label;
}
if (DL.isUnknown() && !UnknownLocations)
return;
}
const MDNode *Scope = DL.getScope(Asm->MF->getFunction()->getContext());
// FIXME: Should only verify each scope once!
if (!DIScope(Scope).Verify())
return;
// DBG_VALUE instruction establishes new value.
DbgVariable *LocalVar = NULL;
if (MI->isDebugValue()) {
DenseMap<const MachineInstr *, DbgVariable *>::iterator DI
= DbgValueStartMap.find(MI);
if (DI != DbgValueStartMap.end()) {
MCSymbol *Label = NULL;
if (DL == PrevInstLoc)
Label = PrevLabel;
else {
Label = recordSourceLine(DL.getLine(), DL.getCol(), Scope);
PrevInstLoc = DL;
PrevLabel = Label;
}
DbgVariableLabelsMap[DI->second] = Label;
}
return;
if (DI != DbgValueStartMap.end())
LocalVar = DI->second;
}
// Emit a label to indicate location change. This is used for line
// table even if this instruction does not start a new scope.
MCSymbol *Label = NULL;
if (DL == PrevInstLoc)
Label = PrevLabel;
else {
// Do not emit line number entry for arguments.
else if (!MI->isDebugValue() || LocalVar) {
const MDNode *Scope = 0;
if (DL.isUnknown() == false) {
Scope = DL.getScope(Asm->MF->getFunction()->getContext());
// FIXME: Should only verify each scope once!
if (!DIScope(Scope).Verify())
return;
}
// else ...
// This instruction has no debug location. If the preceding instruction
// did, emit debug location information to indicate that the debug
// location is now unknown.
Label = recordSourceLine(DL.getLine(), DL.getCol(), Scope);
PrevInstLoc = DL;
PrevLabel = Label;
@ -2245,6 +2220,10 @@ void DwarfDebug::beginScope(const MachineInstr *MI) {
// even if previous label is reused.
if (InsnsBeginScopeSet.count(MI) != 0)
LabelsBeforeInsn[MI] = Label;
// If this is a DBG_VALUE instruction then record label to identify variable.
if (LocalVar)
DbgVariableLabelsMap[LocalVar] = Label;
}
/// endScope - Process end of a scope.