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Undefined value in reg 0 may need a marker to identify end of source range.

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This will be used to truncate live range of DBG_VALUE instruction by register allocator and friends.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121061 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-12-06 22:48:22 +00:00
parent afeaae7a94
commit b7313e274c
1 changed files with 2 additions and 4 deletions
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6
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -2783,16 +2783,14 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
DIVariable DV(MI->getOperand(MI->getNumOperands() - 1).getMetadata());
if (!DV.Verify()) continue;
// If DBG_VALUE is for a local variable then it needs a label.
if (DV.getTag() != dwarf::DW_TAG_arg_variable
&& isDbgValueInUndefinedReg(MI) == false)
if (DV.getTag() != dwarf::DW_TAG_arg_variable)
InsnNeedsLabel.insert(MI);
// DBG_VALUE for inlined functions argument needs a label.
else if (!DISubprogram(getDISubprogram(DV.getContext())).
describes(MF->getFunction()))
InsnNeedsLabel.insert(MI);
// DBG_VALUE indicating argument location change needs a label.
else if (isDbgValueInUndefinedReg(MI) == false
&& !ProcessedArgs.insert(DV))
else if (!ProcessedArgs.insert(DV))
InsnNeedsLabel.insert(MI);
} else {
// If location is unknown then instruction needs a location only if