commit 295cdf8b8293f31953bad9a4a9c0586e934181c6
author Devang Patel <dpatel@apple.com> Mon May 24 18:26:49 2010 +0000
committer Devang Patel <dpatel@apple.com> Mon May 24 18:26:49 2010 +0000
tree 6b3bf3e1c5a8b9e0b9f0eeb61a63d81923c4304b
parent c7cf10c97ef08dc3dbe917e16908cc9bd3d888e6

Do not emit line number entries for unknown debug values.
This fixes recent regression in store.exp from gdb testsuite.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104524 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/DwarfDebug.cpp

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 9af5256..145bf71 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2195,6 +2195,9 @@
     if (!DV.Verify()) return;
     if (DV.getTag() != dwarf::DW_TAG_arg_variable)
       LocalVar = true;
+    // Ignore Undef values.
+    if (MI->getOperand(0).isReg() && !MI->getOperand(0).getReg())
+      LocalVar = false;
   }
 
   MCSymbol *Label = NULL;