From 183a51977128bedcc3c549058c432c29cee9e67e Mon Sep 17 00:00:00 2001
From: Caroline Tice <ctice@apple.com>
Date: Fri, 11 Sep 2009 18:25:54 +0000
Subject: [PATCH] Don't generate Dwarf line table entries for source line 0.

llvm-svn: 81542
---
 llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 29446a427cec..577f111ff602 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -494,6 +494,10 @@ void DwarfDebug::AddSourceLine(DIE *Die, const DISubprogram *SP) {
   // If there is no compile unit specified, don't add a line #.
   if (SP->getCompileUnit().isNull())
     return;
+  // If the line number is 0, don't add it.
+  if (SP->getLineNumber() == 0)
+    return;
+
 
   unsigned Line = SP->getLineNumber();
   unsigned FileID = FindCompileUnit(SP->getCompileUnit()).getID();
@@ -2394,6 +2398,8 @@ void DwarfDebug::EmitDebugLines() {
       unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID());
       if (!LabelID) continue;
 
+      if (LineInfo.getLine() == 0) continue;
+
       if (!Asm->isVerbose())
         Asm->EOL();
       else {