Index: llvm/trunk/lib/Support/Dwarf.cpp
===================================================================
--- llvm/trunk/lib/Support/Dwarf.cpp
+++ llvm/trunk/lib/Support/Dwarf.cpp
@@ -598,6 +598,7 @@
   case DW_LANG_C_plus_plus_11:           return "DW_LANG_C_plus_plus_11";
   case DW_LANG_OCaml:                    return "DW_LANG_OCaml";
   case DW_LANG_lo_user:                  return "DW_LANG_lo_user";
+  case DW_LANG_Mips_Assembler:           return "DW_LANG_Mips_Assembler";
   case DW_LANG_hi_user:                  return "DW_LANG_hi_user";
   }
   return nullptr;
Index: llvm/trunk/test/DebugInfo/2010-03-19-DbgDeclare.ll
===================================================================
--- llvm/trunk/test/DebugInfo/2010-03-19-DbgDeclare.ll
+++ llvm/trunk/test/DebugInfo/2010-03-19-DbgDeclare.ll
@@ -1,6 +1,6 @@
 ; RUN: opt < %s -verify -S | FileCheck %s
 
-; CHECK: lang 0x8001
+; CHECK: [DW_LANG_Mips_Assembler]
 
 define void @Foo(i32 %a, i32 %b) {
 entry:
Index: llvm/trunk/test/MC/MachO/gen-dwarf.s
===================================================================
--- llvm/trunk/test/MC/MachO/gen-dwarf.s
+++ llvm/trunk/test/MC/MachO/gen-dwarf.s
@@ -46,7 +46,7 @@
 // CHECK:    DW_AT_name [DW_FORM_string]
 // We don't check the DW_AT_comp_dir which is the current working directory
 // CHECK:    DW_AT_producer [DW_FORM_string]	("llvm-mc (based on {{.*}})")
-// CHECK:    DW_AT_language [DW_FORM_data2]	(0x8001)
+// CHECK:    DW_AT_language [DW_FORM_data2]	(DW_LANG_Mips_Assembler)
 
 // CHECK:    DW_TAG_label [2] *
 // CHECK:      DW_AT_name [DW_FORM_string]	("bar")