From: Eric Christopher <echristo@gmail.com>
Date: Wed, 4 Sep 2013 21:36:52 +0000 (+0000)
Subject: Revert "Revert r189902 as the workaround shouldn't be necessary anymore."
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6509593cb64669d8d4416a83f1417f4e68632fa1;p=oota-llvm.git

Revert "Revert r189902 as the workaround shouldn't be necessary anymore."

Needs testcase updates.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190000 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 535b094f168..6835f40cd8e 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -161,8 +161,12 @@ DIType DbgVariable::getType() const {
 /// Return Dwarf Version by checking module flags.
 static unsigned getDwarfVersionFromModule(const Module *M) {
   Value *Val = M->getModuleFlag("Dwarf Version");
+  // If we don't have a value in the module go ahead and use the default in
+  // dwarf::DWARF_VERSION.
+  // FIXME: Apple ld has a problem parsing compilation units that specify a
+  // dwarf version of greater than 3.
   if (!Val)
-    return dwarf::DWARF_VERSION;
+    return Triple(M->getTargetTriple()).isOSDarwin() ? 3 : dwarf::DWARF_VERSION;
   return cast<ConstantInt>(Val)->getZExtValue();
 }