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      1 ; RUN: llc -O1 -filetype=obj -mtriple=x86_64-apple-darwin < %s > %t
      2 ; RUN: llvm-dwarfdump %t  | FileCheck %s
      3 ; RUN: llvm-objdump -r %t | FileCheck -check-prefix=DARWIN %s
      4 ; RUN: llc -O1 -filetype=obj -mtriple=x86_64-pc-linux-gnu < %s > %t
      5 ; RUN: llvm-dwarfdump %t  | FileCheck %s
      6 ; RUN: llvm-objdump -r %t | FileCheck -check-prefix=LINUX %s
      7 
      8 ; PR9493
      9 ; Adapted from the original test case in r127757.
     10 ; We use 'llc -O1' to induce variable 'x' to live in different locations.
     11 ; We don't actually care where 'x' lives, or what exact optimizations get
     12 ; used, as long as 'x' moves around we're fine.
     13 
     14 ; // The variable 'x' lives in different locations, so it needs an entry in
     15 ; // the .debug_loc table section, referenced by DW_AT_location.
     16 ; // This ref is not relocatable on Darwin, and is relocatable elsewhere.
     17 ; extern int g(int, int);
     18 ; extern int a;
     19 ; 
     20 ; void f(void) {
     21 ;   int x;
     22 ;   a = g(0, 0);
     23 ;   x = 1;
     24 ;   while (x & 1) { x *= a; }
     25 ;   a = g(x, 0);
     26 ;   x = 2;
     27 ;   while (x & 2) { x *= a; }
     28 ;   a = g(0, x);
     29 ; }
     30 
     31 ; // The 'x' variable and its symbol reference location
     32 ; CHECK: .debug_info contents:
     33 ; CHECK:      DW_TAG_variable
     34 ; CHECK-NEXT:   DW_AT_location [DW_FORM_sec_offset] (0x00000000)
     35 ; CHECK-NEXT:   DW_AT_name {{.*}} "x"
     36 ; CHECK-NEXT:   DW_AT_decl_file
     37 ; CHECK-NEXT:   DW_AT_decl_line
     38 ; CHECK-NEXT:   DW_AT_type
     39 
     40 ; Check that the location contains only 4 ranges - this verifies that the 4th
     41 ; and 5th ranges were successfully merged into a single range.
     42 ; CHECK: .debug_loc contents:
     43 ; CHECK: 0x00000000:
     44 ; CHECK: Beginning address offset:
     45 ; CHECK: Beginning address offset:
     46 ; CHECK: Beginning address offset:
     47 ; CHECK: Beginning address offset:
     48 ; CHECK-NOT: Beginning address offset:
     49 
     50 ; Check that we have no relocations in Darwin's output.
     51 ; DARWIN-NOT: X86_64_RELOC{{.*}} __debug_loc
     52 
     53 ; Check we have a relocation for the debug_loc entry in Linux output.
     54 ; LINUX: RELOCATION RECORDS FOR [.rela.debug_info]
     55 ; LINUX-NOT: RELOCATION RECORDS
     56 ; LINUX: R_X86_64{{.*}} .debug_loc+0
     57 
     58 ; ModuleID = 'simple.c'
     59 target datalayout = "e-p:32:32:32-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-n32"
     60 
     61 @a = external global i32
     62 
     63 define void @f() nounwind {
     64 entry:
     65   %call = tail call i32 @g(i32 0, i32 0) nounwind, !dbg !8
     66   store i32 %call, i32* @a, align 4, !dbg !8
     67   tail call void @llvm.dbg.value(metadata !12, i64 0, metadata !5), !dbg !13
     68   br label %while.body
     69 
     70 while.body:                                       ; preds = %entry, %while.body
     71   %x.017 = phi i32 [ 1, %entry ], [ %mul, %while.body ]
     72   %mul = mul nsw i32 %call, %x.017, !dbg !14
     73   %and = and i32 %mul, 1, !dbg !14
     74   %tobool = icmp eq i32 %and, 0, !dbg !14
     75   br i1 %tobool, label %while.end, label %while.body, !dbg !14
     76 
     77 while.end:                                        ; preds = %while.body
     78   tail call void @llvm.dbg.value(metadata !{i32 %mul}, i64 0, metadata !5), !dbg !14
     79   %call4 = tail call i32 @g(i32 %mul, i32 0) nounwind, !dbg !15
     80   store i32 %call4, i32* @a, align 4, !dbg !15
     81   tail call void @llvm.dbg.value(metadata !16, i64 0, metadata !5), !dbg !17
     82   br label %while.body9
     83 
     84 while.body9:                                      ; preds = %while.end, %while.body9
     85   %x.116 = phi i32 [ 2, %while.end ], [ %mul12, %while.body9 ]
     86   %mul12 = mul nsw i32 %call4, %x.116, !dbg !18
     87   %and7 = and i32 %mul12, 2, !dbg !18
     88   %tobool8 = icmp eq i32 %and7, 0, !dbg !18
     89   br i1 %tobool8, label %while.end13, label %while.body9, !dbg !18
     90 
     91 while.end13:                                      ; preds = %while.body9
     92   tail call void @llvm.dbg.value(metadata !{i32 %mul12}, i64 0, metadata !5), !dbg !18
     93   %call15 = tail call i32 @g(i32 0, i32 %mul12) nounwind, !dbg !19
     94   store i32 %call15, i32* @a, align 4, !dbg !19
     95   ret void, !dbg !20
     96 }
     97 
     98 declare i32 @g(i32, i32)
     99 
    100 declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
    101 
    102 !llvm.dbg.cu = !{!2}
    103 !llvm.module.flags = !{!24}
    104 
    105 !0 = metadata !{i32 786478, metadata !23, metadata !1, metadata !"f", metadata !"f", metadata !"", i32 4, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @f, null, null, metadata !22, i32 4} ; [ DW_TAG_subprogram ] [line 4] [def] [f]
    106 !1 = metadata !{i32 786473, metadata !23} ; [ DW_TAG_file_type ]
    107 !2 = metadata !{i32 786449, metadata !23, i32 12, metadata !"clang version 3.0 (trunk)", i1 true, metadata !"", i32 0, metadata !4, metadata !4, metadata !21, null,  null, null} ; [ DW_TAG_compile_unit ]
    108 !3 = metadata !{i32 786453, metadata !23, metadata !1, metadata !"", i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !4, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
    109 !4 = metadata !{null}
    110 !5 = metadata !{i32 786688, metadata !6, metadata !"x", metadata !1, i32 5, metadata !7, i32 0, null} ; [ DW_TAG_auto_variable ]
    111 !6 = metadata !{i32 786443, metadata !23, metadata !0, i32 4, i32 14, i32 0} ; [ DW_TAG_lexical_block ]
    112 !7 = metadata !{i32 786468, null, metadata !2, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
    113 !8 = metadata !{i32 6, i32 3, metadata !6, null}
    114 !12 = metadata !{i32 1}
    115 !13 = metadata !{i32 7, i32 3, metadata !6, null}
    116 !14 = metadata !{i32 8, i32 3, metadata !6, null}
    117 !15 = metadata !{i32 9, i32 3, metadata !6, null}
    118 !16 = metadata !{i32 2}
    119 !17 = metadata !{i32 10, i32 3, metadata !6, null}
    120 !18 = metadata !{i32 11, i32 3, metadata !6, null}
    121 !19 = metadata !{i32 12, i32 3, metadata !6, null}
    122 !20 = metadata !{i32 13, i32 1, metadata !6, null}
    123 !21 = metadata !{metadata !0}
    124 !22 = metadata !{metadata !5}
    125 !23 = metadata !{metadata !"simple.c", metadata !"/home/rengol01/temp/tests/dwarf/relocation"}
    126 !24 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
    127