diff --git a/test/CodeGen/X86/2010-05-26-DotDebugLoc.ll b/test/CodeGen/X86/2010-05-26-DotDebugLoc.ll
index ac26def8ceb..6600cc3cae4 100644
--- a/test/CodeGen/X86/2010-05-26-DotDebugLoc.ll
+++ b/test/CodeGen/X86/2010-05-26-DotDebugLoc.ll
@@ -1,7 +1,7 @@
 ; RUN: llc -O2 < %s | FileCheck %s
 ; RUN: llc -O2 -regalloc=basic < %s | FileCheck %s
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
-target triple = "x86_64-apple-darwin"
+target triple = "x86_64-apple-darwin10"
 
 %struct.a = type { i32, %struct.a* }
 
diff --git a/test/CodeGen/X86/dbg-value-range.ll b/test/CodeGen/X86/dbg-value-range.ll
index 67e3eee0bdd..da49f2dee1a 100644
--- a/test/CodeGen/X86/dbg-value-range.ll
+++ b/test/CodeGen/X86/dbg-value-range.ll
@@ -1,5 +1,5 @@
-; RUN: llc -mtriple=x86_64-apple-darwin < %s | FileCheck %s
-; RUN: llc -mtriple=x86_64-apple-darwin -regalloc=basic < %s | FileCheck %s
+; RUN: llc -mtriple=x86_64-apple-darwin10 < %s | FileCheck %s
+; RUN: llc -mtriple=x86_64-apple-darwin10 -regalloc=basic < %s | FileCheck %s
 
 %struct.a = type { i32 }
 
diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp
index 7f5fa3ffe8d..99d43c8daf4 100644
--- a/tools/llc/llc.cpp
+++ b/tools/llc/llc.cpp
@@ -278,18 +278,10 @@ int main(int argc, char **argv) {
 
   if (DisableDotLoc)
     Target.setMCUseLoc(false);
-  if (TheTriple.getOS() == Triple::Darwin) {
-    switch (TheTriple.getDarwinMajorNumber()) {
-    case 7:
-    case 8:
-    case 9:
-      // disable .loc support for older darwin OS.
-      Target.setMCUseLoc(false);
-      break;
-    default:
-      break;
-    }
-  }
+
+  // Disable .loc support for older OS X versions.
+  if (TheTriple.isOSX() && TheTriple.isOSXVersionLT(10, 5))
+    Target.setMCUseLoc(false);
 
   // Figure out where we are going to send the output...
   OwningPtr<tool_output_file> Out