Index: lib/CodeGen/LLVMTargetMachine.cpp
===================================================================
--- lib/CodeGen/LLVMTargetMachine.cpp
+++ lib/CodeGen/LLVMTargetMachine.cpp
@@ -196,8 +196,11 @@
     if (!MCE || !MAB)
       return true;
 
-    // Don't waste memory on names of temp labels.
-    Context->setUseNamesOnTempLabels(false);
+    if (getObjFileLowering()->getObjectFileType() ==
+        MCObjectFileInfo::Environment::IsELF) {
+      // Don't waste memory on names of temp labels.
+      Context->setUseNamesOnTempLabels(false);
+    }
 
     Triple T(getTargetTriple().str());
     AsmStreamer.reset(getTarget().createMCObjectStreamer(
Index: test/CodeGen/ARM/elf-debug-label-name.ll
===================================================================
--- test/CodeGen/ARM/elf-debug-label-name.ll
+++ test/CodeGen/ARM/elf-debug-label-name.ll
@@ -0,0 +1,37 @@
+; RUN: llc < %s -mtriple=armv7l-linux-eabihf -filetype=obj -o %s.o && llvm-objdump -t %s.o | FileCheck %s --check-prefix=CHECK
+; CHECK: .debug_str	00000000 .Linfo_string0
+; Function Attrs: nounwind
+define arm_aapcs_vfpcc i32 @_Z1xi(i32 %a) #0 !dbg !4 {
+entry:
+  %a.addr = alloca i32, align 4
+  store i32 %a, i32* %a.addr, align 4
+  call void @llvm.dbg.declare(metadata i32* %a.addr, metadata !13, metadata !14), !dbg !15
+  %0 = load i32, i32* %a.addr, align 4, !dbg !16
+  ret i32 %0, !dbg !17
+}
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!8, !9, !10, !11}
+!llvm.ident = !{!12}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3)
+!1 = !DIFile(filename: "file", directory: "dir")
+!2 = !{}
+!3 = !{!4}
+!4 = distinct !DISubprogram(name: "x", linkageName: "_Z1xi", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
+!5 = !DISubroutineType(types: !6)
+!6 = !{!7, !7}
+!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!8 = !{i32 2, !"Dwarf Version", i32 4}
+!9 = !{i32 2, !"Debug Info Version", i32 3}
+!10 = !{i32 1, !"wchar_size", i32 4}
+!11 = !{i32 1, !"min_enum_size", i32 4}
+!12 = !{!"clang"}
+!13 = !DILocalVariable(name: "a", arg: 1, scope: !4, file: !1, line: 1, type: !7)
+!14 = !DIExpression()
+!15 = !DILocation(line: 1, column: 11, scope: !4)
+!16 = !DILocation(line: 3, column: 10, scope: !4)
+!17 = !DILocation(line: 3, column: 3, scope: !4)