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Speculatively revert r123032.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123039 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2011-01-07 22:33:41 +00:00
parent 6a6623c596
commit 51a666f0e5
5 changed files with 25 additions and 7 deletions
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20
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -2257,6 +2257,15 @@ DwarfDebug::collectVariableInfoFromMMITable(const MachineFunction * MF,
}
}
/// isDbgValueInUndefinedReg - Return true if debug value, encoded by
/// DBG_VALUE instruction, is in undefined reg.
static bool isDbgValueInUndefinedReg(const MachineInstr *MI) {
assert (MI->isDebugValue() && "Invalid DBG_VALUE machine instruction!");
if (MI->getOperand(0).isReg() && !MI->getOperand(0).getReg())
return true;
return false;
}
/// isDbgValueInDefinedReg - Return true if debug value, encoded by
/// DBG_VALUE instruction, is in a defined reg.
static bool isDbgValueInDefinedReg(const MachineInstr *MI) {
@ -2281,7 +2290,7 @@ DwarfDebug::collectVariableInfo(const MachineFunction *MF,
for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
II != IE; ++II) {
const MachineInstr *MInsn = II;
if (!MInsn->isDebugValue())
if (!MInsn->isDebugValue() || isDbgValueInUndefinedReg(MInsn))
continue;
DbgValues.push_back(MInsn);
}
@ -2303,18 +2312,19 @@ DwarfDebug::collectVariableInfo(const MachineFunction *MF,
ME = DbgValues.end(); MI != ME; ++MI) {
const MDNode *Var =
(*MI)->getOperand((*MI)->getNumOperands()-1).getMetadata();
if (Var == DV &&
if (Var == DV && isDbgValueInDefinedReg(*MI) &&
!PrevMI->isIdenticalTo(*MI))
MultipleValues.push_back(*MI);
PrevMI = *MI;
}
DbgScope *Scope = NULL;
DbgScope *Scope = findDbgScope(MInsn);
bool CurFnArg = false;
if (DV.getTag() == dwarf::DW_TAG_arg_variable &&
DISubprogram(DV.getContext()).describes(MF->getFunction()))
CurFnArg = true;
if (!Scope && CurFnArg)
Scope = CurrentFnDbgScope;
else
Scope = findDbgScope(MInsn);
// If variable scope is not found then skip this variable.
if (!Scope)
continue;