From: Devang Patel <dpatel@apple.com>
Date: Thu, 1 Jul 2010 21:38:08 +0000 (+0000)
Subject: Do not require line number entry for undefined local variable.
X-Git-Tag: android-x86-6.0-r1~1003^2~5140
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=7fb231cbecb18634ef4af8d87ab82b6987f664d8;p=android-x86%2Fexternal-llvm.git

Do not require line number entry for undefined local variable.
This is a regression caused by r106792 and caught by gdb testsuite.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107430 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 50c0feac091..5343adaa7a2 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2690,10 +2690,12 @@ 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)
+        if (DV.getTag() != dwarf::DW_TAG_arg_variable 
+            && isDbgValueInUndefinedReg(MI) == false)
           InsnNeedsLabel.insert(MI);
         // DBG_VALUE for inlined functions argument needs a label.
-        else if (!DISubprogram(DV.getContext()).describes(MF->getFunction()))
+        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))