; RUN: llc -split-dwarf-file=foo.dwo -O0 %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
; RUN: llvm-dwarfdump -v %t | FileCheck %s
; RUN: llvm-objdump -h %t | FileCheck --check-prefix=HDR %s

; CHECK: .debug_info contents:
; CHECK: DW_TAG_compile_unit
; CHECK-NEXT: DW_AT_stmt_list
; CHECK-NEXT: DW_AT_GNU_dwo_name
; CHECK-NEXT: DW_AT_comp_dir
; CHECK-NEXT: DW_AT_GNU_dwo_id
; CHECK-NEXT: DW_AT_GNU_addr_base [DW_FORM_sec_offset]                   (0x00000000)


; CHECK: .debug_info.dwo contents:
; CHECK: DW_AT_location [DW_FORM_sec_offset]   ([[A:0x[0-9a-z]*]]
; CHECK: DW_AT_location [DW_FORM_sec_offset]   ([[E:0x[0-9a-z]*]]
; CHECK: DW_AT_location [DW_FORM_sec_offset]   ([[B:0x[0-9a-z]*]]
; CHECK: DW_AT_location [DW_FORM_sec_offset]   ([[D:0x[0-9a-z]*]]
; CHECK: DW_AT_ranges [DW_FORM_sec_offset]   (0x00000000
; CHECK-NOT: .debug_loc contents:
; CHECK-NOT: Beginning address offset
; CHECK: .debug_loc.dwo contents:

; Don't assume these locations are entirely correct - feel free to update them
; if they've changed due to a bugfix, change in register allocation, etc.

; CHECK:      [[A]]:
; CHECK-NEXT:   Addr idx 2 (w/ length 169): DW_OP_consts +0, DW_OP_stack_value
; CHECK-NEXT:   Addr idx 3 (w/ length 25): DW_OP_reg0 RAX
; CHECK:      [[E]]:
; CHECK-NEXT:   Addr idx 4 (w/ length 19): DW_OP_reg0 RAX
; CHECK:      [[B]]:
; CHECK-NEXT:   Addr idx 5 (w/ length 17): DW_OP_reg0 RAX
; CHECK:      [[D]]:
; CHECK-NEXT:   Addr idx 6 (w/ length 17): DW_OP_reg0 RAX


; Make sure we don't produce any relocations in any .dwo section (though in particular, debug_info.dwo)
; HDR-NOT: .rela.{{.*}}.dwo

; Make sure we have enough stuff in the debug_addr to cover the address indexes
; (6 is the last index in debug_loc.dwo, making 7 entries of 8 bytes each, 7 * 8
; == 56 base 10 == 38 base 16)

; HDR: .debug_addr 00000038
; HDR-NOT: .rela.{{.*}}.dwo

; From the code:

; extern int c;
; static void foo (int p)
; {
;   int a, b; 
;   unsigned int d, e;

;   for (a = 0; a < 30; a++)
;     for (d = 0; d < 30; d++)
;       for (b = 0; b < 30; b++)
;         for (e = 0; e < 30; e++)
;           {
;             int *w = &c; 
;             *w &= p; 
;           }
; }

; void 
; bar ()
; {
;   foo (1);
; }

; compiled with:

; clang -g -S -gsplit-dwarf -O1 small.c

@c = external global i32

; Function Attrs: nounwind uwtable
define void @bar() #0 !dbg !4 {
entry:
  tail call fastcc void @foo(), !dbg !27
  ret void, !dbg !28
}

; Function Attrs: nounwind uwtable
define internal fastcc void @foo() #0 !dbg !8 {
entry:
  tail call void @llvm.dbg.value(metadata i32 1, metadata !13, metadata !DIExpression()), !dbg !30
  tail call void @llvm.dbg.value(metadata i32 0, metadata !14, metadata !DIExpression()), !dbg !31
  %c.promoted9 = load i32, i32* @c, align 4, !dbg !32, !tbaa !33
  br label %for.cond1.preheader, !dbg !31

for.cond1.preheader:                              ; preds = %for.inc16, %entry
  %and.lcssa.lcssa.lcssa10 = phi i32 [ %c.promoted9, %entry ], [ %and, %for.inc16 ]
  %a.08 = phi i32 [ 0, %entry ], [ %inc17, %for.inc16 ]
  br label %for.cond4.preheader, !dbg !37

for.cond4.preheader:                              ; preds = %for.inc13, %for.cond1.preheader
  %and.lcssa.lcssa7 = phi i32 [ %and.lcssa.lcssa.lcssa10, %for.cond1.preheader ], [ %and, %for.inc13 ]
  %d.06 = phi i32 [ 0, %for.cond1.preheader ], [ %inc14, %for.inc13 ]
  br label %for.cond7.preheader, !dbg !38

for.cond7.preheader:                              ; preds = %for.inc10, %for.cond4.preheader
  %and.lcssa5 = phi i32 [ %and.lcssa.lcssa7, %for.cond4.preheader ], [ %and, %for.inc10 ]
  %b.03 = phi i32 [ 0, %for.cond4.preheader ], [ %inc11, %for.inc10 ]
  br label %for.body9, !dbg !39

for.body9:                                        ; preds = %for.body9, %for.cond7.preheader
  %and2 = phi i32 [ %and.lcssa5, %for.cond7.preheader ], [ %and, %for.body9 ], !dbg !40
  %e.01 = phi i32 [ 0, %for.cond7.preheader ], [ %inc, %for.body9 ]
  tail call void @llvm.dbg.value(metadata i32* @c, metadata !19, metadata !DIExpression()), !dbg !40
  %and = and i32 %and2, 1, !dbg !32
  %inc = add i32 %e.01, 1, !dbg !39
  tail call void @llvm.dbg.value(metadata i32 %inc, metadata !18, metadata !DIExpression()), !dbg !39
  %exitcond = icmp eq i32 %inc, 30, !dbg !39
  br i1 %exitcond, label %for.inc10, label %for.body9, !dbg !39

for.inc10:                                        ; preds = %for.body9
  %inc11 = add nsw i32 %b.03, 1, !dbg !38
  tail call void @llvm.dbg.value(metadata i32 %inc11, metadata !15, metadata !DIExpression()), !dbg !38
  %exitcond11 = icmp eq i32 %inc11, 30, !dbg !38
  br i1 %exitcond11, label %for.inc13, label %for.cond7.preheader, !dbg !38

for.inc13:                                        ; preds = %for.inc10
  %inc14 = add i32 %d.06, 1, !dbg !37
  tail call void @llvm.dbg.value(metadata i32 %inc14, metadata !16, metadata !DIExpression()), !dbg !37
  %exitcond12 = icmp eq i32 %inc14, 30, !dbg !37
  br i1 %exitcond12, label %for.inc16, label %for.cond4.preheader, !dbg !37

for.inc16:                                        ; preds = %for.inc13
  %inc17 = add nsw i32 %a.08, 1, !dbg !31
  tail call void @llvm.dbg.value(metadata i32 %inc17, metadata !14, metadata !DIExpression()), !dbg !31
  %exitcond13 = icmp eq i32 %inc17, 30, !dbg !31
  br i1 %exitcond13, label %for.end18, label %for.cond1.preheader, !dbg !31

for.end18:                                        ; preds = %for.inc16
  store i32 %and, i32* @c, align 4, !dbg !32, !tbaa !33
  ret void, !dbg !42
}

; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, metadata, metadata) #1

attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone }

!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!26, !43}

!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.4 (trunk 191700) (llvm/trunk 191710)", isOptimized: true, splitDebugFilename: "small.dwo", emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "small.c", directory: "/usr/local/google/home/echristo/tmp")
!2 = !{}
!4 = distinct !DISubprogram(name: "bar", line: 18, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: true, unit: !0, scopeLine: 19, file: !1, scope: !5, type: !6, retainedNodes: !2)
!5 = !DIFile(filename: "small.c", directory: "/usr/local/google/home/echristo/tmp")
!6 = !DISubroutineType(types: !7)
!7 = !{null}
!8 = distinct !DISubprogram(name: "foo", line: 2, isLocal: true, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 3, file: !1, scope: !5, type: !9, retainedNodes: !12)
!9 = !DISubroutineType(types: !10)
!10 = !{null, !11}
!11 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!12 = !{!13, !14, !15, !16, !18, !19}
!13 = !DILocalVariable(name: "p", line: 2, arg: 1, scope: !8, file: !5, type: !11)
!14 = !DILocalVariable(name: "a", line: 4, scope: !8, file: !5, type: !11)
!15 = !DILocalVariable(name: "b", line: 4, scope: !8, file: !5, type: !11)
!16 = !DILocalVariable(name: "d", line: 5, scope: !8, file: !5, type: !17)
!17 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
!18 = !DILocalVariable(name: "e", line: 5, scope: !8, file: !5, type: !17)
!19 = !DILocalVariable(name: "w", line: 12, scope: !20, file: !5, type: !25)
!20 = distinct !DILexicalBlock(line: 11, column: 0, file: !1, scope: !21)
!21 = distinct !DILexicalBlock(line: 10, column: 0, file: !1, scope: !22)
!22 = distinct !DILexicalBlock(line: 9, column: 0, file: !1, scope: !23)
!23 = distinct !DILexicalBlock(line: 8, column: 0, file: !1, scope: !24)
!24 = distinct !DILexicalBlock(line: 7, column: 0, file: !1, scope: !8)
!25 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !11)
!26 = !{i32 2, !"Dwarf Version", i32 4}
!27 = !DILocation(line: 20, scope: !4)
!28 = !DILocation(line: 21, scope: !4)
!29 = !{i32 1}
!30 = !DILocation(line: 2, scope: !8)
!31 = !DILocation(line: 7, scope: !24)
!32 = !DILocation(line: 13, scope: !20)
!33 = !{!34, !34, i64 0}
!34 = !{!"int", !35, i64 0}
!35 = !{!"omnipotent char", !36, i64 0}
!36 = !{!"Simple C/C++ TBAA"}
!37 = !DILocation(line: 8, scope: !23)
!38 = !DILocation(line: 9, scope: !22)
!39 = !DILocation(line: 10, scope: !21)
!40 = !DILocation(line: 12, scope: !20)
!41 = !{i32* @c}
!42 = !DILocation(line: 15, scope: !8)
!43 = !{i32 1, !"Debug Info Version", i32 3}
!44 = !{i32 0}