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      1 ; RUN: llc < %s | FileCheck %s
      2 
      3 target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32"
      4 target triple = "thumbv7-apple-darwin10"
      5 
      6 @x1 = internal global i8 1
      7 @x2 = internal global i8 1
      8 @x3 = internal global i8 1
      9 @x4 = internal global i8 1
     10 @x5 = global i8 1
     11 
     12 ; Check debug info output for merged global.
     13 ; DW_AT_location
     14 ; DW_OP_addr
     15 ; DW_OP_plus
     16 ; .long __MergedGlobals
     17 ; DW_OP_constu
     18 ; offset
     19 
     20 ;CHECK:        .ascii   "x2"                   @ DW_AT_name
     21 ;CHECK-NEXT:        .byte   0
     22 ;CHECK-NEXT:        @ DW_AT_type
     23 ;CHECK-NEXT:        @ DW_AT_decl_file
     24 ;CHECK-NEXT:        @ DW_AT_decl_line
     25 ;CHECK-NEXT:        @ DW_AT_location
     26 ;CHECK-NEXT:        .byte   3
     27 ;CHECK-NEXT:        .long   __MergedGlobals
     28 ;CHECK-NEXT:        .byte   16
     29 ;CHECK-NEXT:        .byte   1
     30 ;CHECK-NEXT:        .byte   34
     31 
     32 define zeroext i8 @get1(i8 zeroext %a) nounwind optsize {
     33 entry:
     34   tail call void @llvm.dbg.value(metadata !{i8 %a}, i64 0, metadata !10), !dbg !30
     35   %0 = load i8* @x1, align 4, !dbg !30
     36   tail call void @llvm.dbg.value(metadata !{i8 %0}, i64 0, metadata !11), !dbg !30
     37   store i8 %a, i8* @x1, align 4, !dbg !30
     38   ret i8 %0, !dbg !31
     39 }
     40 
     41 declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
     42 
     43 define zeroext i8 @get2(i8 zeroext %a) nounwind optsize {
     44 entry:
     45   tail call void @llvm.dbg.value(metadata !{i8 %a}, i64 0, metadata !18), !dbg !32
     46   %0 = load i8* @x2, align 4, !dbg !32
     47   tail call void @llvm.dbg.value(metadata !{i8 %0}, i64 0, metadata !19), !dbg !32
     48   store i8 %a, i8* @x2, align 4, !dbg !32
     49   ret i8 %0, !dbg !33
     50 }
     51 
     52 define zeroext i8 @get3(i8 zeroext %a) nounwind optsize {
     53 entry:
     54   tail call void @llvm.dbg.value(metadata !{i8 %a}, i64 0, metadata !21), !dbg !34
     55   %0 = load i8* @x3, align 4, !dbg !34
     56   tail call void @llvm.dbg.value(metadata !{i8 %0}, i64 0, metadata !22), !dbg !34
     57   store i8 %a, i8* @x3, align 4, !dbg !34
     58   ret i8 %0, !dbg !35
     59 }
     60 
     61 define zeroext i8 @get4(i8 zeroext %a) nounwind optsize {
     62 entry:
     63   tail call void @llvm.dbg.value(metadata !{i8 %a}, i64 0, metadata !24), !dbg !36
     64   %0 = load i8* @x4, align 4, !dbg !36
     65   tail call void @llvm.dbg.value(metadata !{i8 %0}, i64 0, metadata !25), !dbg !36
     66   store i8 %a, i8* @x4, align 4, !dbg !36
     67   ret i8 %0, !dbg !37
     68 }
     69 
     70 define zeroext i8 @get5(i8 zeroext %a) nounwind optsize {
     71 entry:
     72   tail call void @llvm.dbg.value(metadata !{i8 %a}, i64 0, metadata !27), !dbg !38
     73   %0 = load i8* @x5, align 4, !dbg !38
     74   tail call void @llvm.dbg.value(metadata !{i8 %0}, i64 0, metadata !28), !dbg !38
     75   store i8 %a, i8* @x5, align 4, !dbg !38
     76   ret i8 %0, !dbg !39
     77 }
     78 
     79 !llvm.dbg.sp = !{!0, !6, !7, !8, !9}
     80 !llvm.dbg.lv.get1 = !{!10, !11}
     81 !llvm.dbg.gv = !{!13, !14, !15, !16, !17}
     82 !llvm.dbg.lv.get2 = !{!18, !19}
     83 !llvm.dbg.lv.get3 = !{!21, !22}
     84 !llvm.dbg.lv.get4 = !{!24, !25}
     85 !llvm.dbg.lv.get5 = !{!27, !28}
     86 
     87 !0 = metadata !{i32 589870, i32 0, metadata !1, metadata !"get1", metadata !"get1", metadata !"get1", metadata !1, i32 4, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i8 (i8)* @get1} ; [ DW_TAG_subprogram ]
     88 !1 = metadata !{i32 589865, metadata !"foo.c", metadata !"/tmp/", metadata !2} ; [ DW_TAG_file_type ]
     89 !2 = metadata !{i32 589841, i32 0, i32 1, metadata !"foo.c", metadata !"/tmp/", metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2369.8)", i1 true, i1 true, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
     90 !3 = metadata !{i32 589845, metadata !1, metadata !"", metadata !1, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !4, i32 0, null} ; [ DW_TAG_subroutine_type ]
     91 !4 = metadata !{metadata !5, metadata !5}
     92 !5 = metadata !{i32 589860, metadata !1, metadata !"_Bool", metadata !1, i32 0, i64 8, i64 8, i64 0, i32 0, i32 2} ; [ DW_TAG_base_type ]
     93 !6 = metadata !{i32 589870, i32 0, metadata !1, metadata !"get2", metadata !"get2", metadata !"get2", metadata !1, i32 7, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i8 (i8)* @get2} ; [ DW_TAG_subprogram ]
     94 !7 = metadata !{i32 589870, i32 0, metadata !1, metadata !"get3", metadata !"get3", metadata !"get3", metadata !1, i32 10, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i8 (i8)* @get3} ; [ DW_TAG_subprogram ]
     95 !8 = metadata !{i32 589870, i32 0, metadata !1, metadata !"get4", metadata !"get4", metadata !"get4", metadata !1, i32 13, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i8 (i8)* @get4} ; [ DW_TAG_subprogram ]
     96 !9 = metadata !{i32 589870, i32 0, metadata !1, metadata !"get5", metadata !"get5", metadata !"get5", metadata !1, i32 16, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i8 (i8)* @get5} ; [ DW_TAG_subprogram ]
     97 !10 = metadata !{i32 590081, metadata !0, metadata !"a", metadata !1, i32 4, metadata !5, i32 0} ; [ DW_TAG_arg_variable ]
     98 !11 = metadata !{i32 590080, metadata !12, metadata !"b", metadata !1, i32 4, metadata !5, i32 0} ; [ DW_TAG_auto_variable ]
     99 !12 = metadata !{i32 589835, metadata !0, i32 4, i32 0, metadata !1, i32 0} ; [ DW_TAG_lexical_block ]
    100 !13 = metadata !{i32 589876, i32 0, metadata !1, metadata !"x1", metadata !"x1", metadata !"", metadata !1, i32 3, metadata !5, i1 true, i1 true, i8* @x1} ; [ DW_TAG_variable ]
    101 !14 = metadata !{i32 589876, i32 0, metadata !1, metadata !"x2", metadata !"x2", metadata !"", metadata !1, i32 6, metadata !5, i1 true, i1 true, i8* @x2} ; [ DW_TAG_variable ]
    102 !15 = metadata !{i32 589876, i32 0, metadata !1, metadata !"x3", metadata !"x3", metadata !"", metadata !1, i32 9, metadata !5, i1 true, i1 true, i8* @x3} ; [ DW_TAG_variable ]
    103 !16 = metadata !{i32 589876, i32 0, metadata !1, metadata !"x4", metadata !"x4", metadata !"", metadata !1, i32 12, metadata !5, i1 true, i1 true, i8* @x4} ; [ DW_TAG_variable ]
    104 !17 = metadata !{i32 589876, i32 0, metadata !1, metadata !"x5", metadata !"x5", metadata !"", metadata !1, i32 15, metadata !5, i1 false, i1 true, i8* @x5} ; [ DW_TAG_variable ]
    105 !18 = metadata !{i32 590081, metadata !6, metadata !"a", metadata !1, i32 7, metadata !5, i32 0} ; [ DW_TAG_arg_variable ]
    106 !19 = metadata !{i32 590080, metadata !20, metadata !"b", metadata !1, i32 7, metadata !5, i32 0} ; [ DW_TAG_auto_variable ]
    107 !20 = metadata !{i32 589835, metadata !6, i32 7, i32 0, metadata !1, i32 1} ; [ DW_TAG_lexical_block ]
    108 !21 = metadata !{i32 590081, metadata !7, metadata !"a", metadata !1, i32 10, metadata !5, i32 0} ; [ DW_TAG_arg_variable ]
    109 !22 = metadata !{i32 590080, metadata !23, metadata !"b", metadata !1, i32 10, metadata !5, i32 0} ; [ DW_TAG_auto_variable ]
    110 !23 = metadata !{i32 589835, metadata !7, i32 10, i32 0, metadata !1, i32 2} ; [ DW_TAG_lexical_block ]
    111 !24 = metadata !{i32 590081, metadata !8, metadata !"a", metadata !1, i32 13, metadata !5, i32 0} ; [ DW_TAG_arg_variable ]
    112 !25 = metadata !{i32 590080, metadata !26, metadata !"b", metadata !1, i32 13, metadata !5, i32 0} ; [ DW_TAG_auto_variable ]
    113 !26 = metadata !{i32 589835, metadata !8, i32 13, i32 0, metadata !1, i32 3} ; [ DW_TAG_lexical_block ]
    114 !27 = metadata !{i32 590081, metadata !9, metadata !"a", metadata !1, i32 16, metadata !5, i32 0} ; [ DW_TAG_arg_variable ]
    115 !28 = metadata !{i32 590080, metadata !29, metadata !"b", metadata !1, i32 16, metadata !5, i32 0} ; [ DW_TAG_auto_variable ]
    116 !29 = metadata !{i32 589835, metadata !9, i32 16, i32 0, metadata !1, i32 4} ; [ DW_TAG_lexical_block ]
    117 !30 = metadata !{i32 4, i32 0, metadata !0, null}
    118 !31 = metadata !{i32 4, i32 0, metadata !12, null}
    119 !32 = metadata !{i32 7, i32 0, metadata !6, null}
    120 !33 = metadata !{i32 7, i32 0, metadata !20, null}
    121 !34 = metadata !{i32 10, i32 0, metadata !7, null}
    122 !35 = metadata !{i32 10, i32 0, metadata !23, null}
    123 !36 = metadata !{i32 13, i32 0, metadata !8, null}
    124 !37 = metadata !{i32 13, i32 0, metadata !26, null}
    125 !38 = metadata !{i32 16, i32 0, metadata !9, null}
    126 !39 = metadata !{i32 16, i32 0, metadata !29, null}
    127