From f2e77676242bb5a3940da7b41c42704135e6bd92 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Tue, 1 Jun 2010 21:43:09 +0000
Subject: [PATCH] Ignore line number of debug value in undefined register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105292 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index f75447ec812..c9207c5a1ef 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2631,6 +2631,7 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
         assert (MI->getNumOperands() > 1 && "Invalid machine instruction!");
         DIVariable DV(MI->getOperand(MI->getNumOperands() - 1).getMetadata());
         if (!DV.Verify()) continue;
+        if (isDbgValueInUndefinedReg(MI)) continue;
         // If DBG_VALUE is for a local variable then it needs a label.
         if (DV.getTag() != dwarf::DW_TAG_arg_variable)
           InsnNeedsLabel.insert(MI);