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      1 ; RUN: llc -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
      2 ; CHECK: DW_TAG_variable
      3 ; CHECK-NEXT: DW_AT_const_value [DW_FORM_udata]	(0)
      4 ; CHECK-NEXT: DW_AT_name {{.*}}"a"
      5 ;
      6 ; ModuleID = 'union.c'
      7 ; generated at -O1 from:
      8 ; union mfi_evt {
      9 ;   struct {
     10 ;     int reserved;
     11 ;   } members;
     12 ; } mfi_aen_setup() {
     13 ;   union mfi_evt a;
     14 ;   a.members.reserved = 0;
     15 ; }
     16 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
     17 target triple = "x86_64-apple-macosx10.10.0"
     18 
     19 %union.mfi_evt = type { %struct.anon }
     20 %struct.anon = type { i32 }
     21 
     22 ; Function Attrs: nounwind readnone ssp uwtable
     23 define i32 @mfi_aen_setup() #0 {
     24 entry:
     25   tail call void @llvm.dbg.declare(metadata %union.mfi_evt* undef, metadata !16, metadata !21), !dbg !22
     26   tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !16, metadata !21), !dbg !22
     27   ret i32 undef, !dbg !23
     28 }
     29 
     30 ; Function Attrs: nounwind readnone
     31 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
     32 
     33 ; Function Attrs: nounwind readnone
     34 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
     35 
     36 attributes #0 = { nounwind readnone ssp uwtable }
     37 attributes #1 = { nounwind readnone }
     38 
     39 !llvm.dbg.cu = !{!0}
     40 !llvm.module.flags = !{!17, !18, !19}
     41 !llvm.ident = !{!20}
     42 
     43 !0 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.7.0 (trunk 226915) (llvm/trunk 226905)", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
     44 !1 = !MDFile(filename: "union.c", directory: "")
     45 !2 = !{}
     46 !3 = !{!4}
     47 !4 = !MDSubprogram(name: "mfi_aen_setup", line: 5, isLocal: false, isDefinition: true, isOptimized: true, scopeLine: 5, file: !1, scope: !5, type: !6, function: i32 ()* @mfi_aen_setup, variables: !15)
     48 !5 = !MDFile(filename: "union.c", directory: "")
     49 !6 = !MDSubroutineType(types: !7)
     50 !7 = !{!8}
     51 !8 = !MDCompositeType(tag: DW_TAG_union_type, name: "mfi_evt", line: 1, size: 32, align: 32, file: !1, elements: !9)
     52 !9 = !{!10}
     53 !10 = !MDDerivedType(tag: DW_TAG_member, name: "members", line: 4, size: 32, align: 32, file: !1, scope: !8, baseType: !11)
     54 !11 = !MDCompositeType(tag: DW_TAG_structure_type, line: 2, size: 32, align: 32, file: !1, scope: !8, elements: !12)
     55 !12 = !{!13}
     56 !13 = !MDDerivedType(tag: DW_TAG_member, name: "reserved", line: 3, size: 32, align: 32, file: !1, scope: !11, baseType: !14)
     57 !14 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
     58 !15 = !{!16}
     59 !16 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "a", line: 6, scope: !4, file: !5, type: !8)
     60 !17 = !{i32 2, !"Dwarf Version", i32 2}
     61 !18 = !{i32 2, !"Debug Info Version", i32 3}
     62 !19 = !{i32 1, !"PIC Level", i32 2}
     63 !20 = !{!"clang version 3.7.0 (trunk 226915) (llvm/trunk 226905)"}
     64 !21 = !MDExpression()
     65 !22 = !MDLocation(line: 6, column: 17, scope: !4)
     66 !23 = !MDLocation(line: 8, column: 1, scope: !4)
     67