Undefined value in reg 0 may need a marker to identify end of source range.
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
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index f2c7238..f430550 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2783,16 +2783,14 @@
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