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Collect variable information during endFunction() instead of beginFunction().

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104412 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-05-22 00:04:14 +00:00
parent 46099f14dc
commit 65eb482e8f
1 changed files with 12 additions and 12 deletions
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24
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -2156,8 +2156,10 @@ void DwarfDebug::collectVariableInfo(const MachineFunction *MF) {
DbgVariable *RegVar = new DbgVariable(DV); DbgVariable *RegVar = new DbgVariable(DV);
DbgVariableToDbgInstMap[RegVar] = MInsn; DbgVariableToDbgInstMap[RegVar] = MInsn;
Scope->addVariable(RegVar); Scope->addVariable(RegVar);
if (DV.getTag() != dwarf::DW_TAG_arg_variable) if (DV.getTag() != dwarf::DW_TAG_arg_variable) {
DbgValueStartMap[MInsn] = RegVar; DbgValueStartMap[MInsn] = RegVar;
DbgVariableLabelsMap[RegVar] = LabelsBeforeInsn.lookup(MInsn);
}
if (DbgVariable *AbsVar = findAbstractVariable(DV, MInsn->getDebugLoc())) { if (DbgVariable *AbsVar = findAbstractVariable(DV, MInsn->getDebugLoc())) {
DbgVariableToDbgInstMap[AbsVar] = MInsn; DbgVariableToDbgInstMap[AbsVar] = MInsn;
VarToAbstractVarMap[RegVar] = AbsVar; VarToAbstractVarMap[RegVar] = AbsVar;
@ -2186,12 +2188,13 @@ void DwarfDebug::beginScope(const MachineInstr *MI) {
if (DL.isUnknown() && !UnknownLocations) if (DL.isUnknown() && !UnknownLocations)
return; return;
DbgVariable *LocalVar = NULL; bool LocalVar = false;
if (MI->isDebugValue()) { if (MI->isDebugValue()) {
DenseMap<const MachineInstr *, DbgVariable *>::iterator DI assert (MI->getNumOperands() > 1 && "Invalid machine instruction!");
= DbgValueStartMap.find(MI); DIVariable DV(MI->getOperand(MI->getNumOperands() - 1).getMetadata());
if (DI != DbgValueStartMap.end()) if (!DV.Verify()) return;
LocalVar = DI->second; if (DV.getTag() != dwarf::DW_TAG_arg_variable)
LocalVar = true;
} }
MCSymbol *Label = NULL; MCSymbol *Label = NULL;
@ -2220,10 +2223,6 @@ void DwarfDebug::beginScope(const MachineInstr *MI) {
// even if previous label is reused. // even if previous label is reused.
if (InsnsBeginScopeSet.count(MI) != 0) if (InsnsBeginScopeSet.count(MI) != 0)
LabelsBeforeInsn[MI] = Label; 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. /// endScope - Process end of a scope.
@ -2510,8 +2509,6 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
if (!MMI->hasDebugInfo()) return; if (!MMI->hasDebugInfo()) return;
if (!extractScopeInformation()) return; if (!extractScopeInformation()) return;
collectVariableInfo(MF);
FunctionBeginSym = Asm->GetTempSymbol("func_begin", FunctionBeginSym = Asm->GetTempSymbol("func_begin",
Asm->getFunctionNumber()); Asm->getFunctionNumber());
// Assumes in correct section after the entry point. // Assumes in correct section after the entry point.
@ -2543,6 +2540,9 @@ void DwarfDebug::endFunction(const MachineFunction *MF) {
if (!MMI->hasDebugInfo() || DbgScopeMap.empty()) return; if (!MMI->hasDebugInfo() || DbgScopeMap.empty()) return;
if (CurrentFnDbgScope) { if (CurrentFnDbgScope) {
collectVariableInfo(MF);
// Define end label for subprogram. // Define end label for subprogram.
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("func_end", Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("func_end",
Asm->getFunctionNumber())); Asm->getFunctionNumber()));