1; RUN: llc -split-dwarf=Enable -O0 %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t 2; RUN: llvm-dwarfdump -debug-dump=all %t | FileCheck %s 3 4; From the code: 5 6; extern int c; 7; static void foo (int p) 8; { 9; int a, b; 10; unsigned int d, e; 11 12; for (a = 0; a < 30; a++) 13; for (d = 0; d < 30; d++) 14; for (b = 0; b < 30; b++) 15; for (e = 0; e < 30; e++) 16; { 17; int *w = &c; 18; *w &= p; 19; } 20; } 21 22; void 23; bar () 24; { 25; foo (1); 26; } 27 28; compiled with: 29 30; clang -g -S -gsplit-dwarf -O1 small.c 31 32; CHECK: DW_AT_GNU_ranges_base 33 34@c = external global i32 35 36; Function Attrs: nounwind uwtable 37define void @bar() #0 { 38entry: 39 tail call fastcc void @foo(), !dbg !27 40 ret void, !dbg !28 41} 42 43; Function Attrs: nounwind uwtable 44define internal fastcc void @foo() #0 { 45entry: 46 tail call void @llvm.dbg.value(metadata !29, i64 0, metadata !13), !dbg !30 47 tail call void @llvm.dbg.value(metadata !2, i64 0, metadata !14), !dbg !31 48 %c.promoted9 = load i32* @c, align 4, !dbg !32, !tbaa !33 49 br label %for.cond1.preheader, !dbg !31 50 51for.cond1.preheader: ; preds = %for.inc16, %entry 52 %and.lcssa.lcssa.lcssa10 = phi i32 [ %c.promoted9, %entry ], [ %and, %for.inc16 ] 53 %a.08 = phi i32 [ 0, %entry ], [ %inc17, %for.inc16 ] 54 br label %for.cond4.preheader, !dbg !37 55 56for.cond4.preheader: ; preds = %for.inc13, %for.cond1.preheader 57 %and.lcssa.lcssa7 = phi i32 [ %and.lcssa.lcssa.lcssa10, %for.cond1.preheader ], [ %and, %for.inc13 ] 58 %d.06 = phi i32 [ 0, %for.cond1.preheader ], [ %inc14, %for.inc13 ] 59 br label %for.cond7.preheader, !dbg !38 60 61for.cond7.preheader: ; preds = %for.inc10, %for.cond4.preheader 62 %and.lcssa5 = phi i32 [ %and.lcssa.lcssa7, %for.cond4.preheader ], [ %and, %for.inc10 ] 63 %b.03 = phi i32 [ 0, %for.cond4.preheader ], [ %inc11, %for.inc10 ] 64 br label %for.body9, !dbg !39 65 66for.body9: ; preds = %for.body9, %for.cond7.preheader 67 %and2 = phi i32 [ %and.lcssa5, %for.cond7.preheader ], [ %and, %for.body9 ], !dbg !40 68 %e.01 = phi i32 [ 0, %for.cond7.preheader ], [ %inc, %for.body9 ] 69 tail call void @llvm.dbg.value(metadata !41, i64 0, metadata !19), !dbg !40 70 %and = and i32 %and2, 1, !dbg !32 71 %inc = add i32 %e.01, 1, !dbg !39 72 tail call void @llvm.dbg.value(metadata !{i32 %inc}, i64 0, metadata !18), !dbg !39 73 %exitcond = icmp eq i32 %inc, 30, !dbg !39 74 br i1 %exitcond, label %for.inc10, label %for.body9, !dbg !39 75 76for.inc10: ; preds = %for.body9 77 %inc11 = add nsw i32 %b.03, 1, !dbg !38 78 tail call void @llvm.dbg.value(metadata !{i32 %inc11}, i64 0, metadata !15), !dbg !38 79 %exitcond11 = icmp eq i32 %inc11, 30, !dbg !38 80 br i1 %exitcond11, label %for.inc13, label %for.cond7.preheader, !dbg !38 81 82for.inc13: ; preds = %for.inc10 83 %inc14 = add i32 %d.06, 1, !dbg !37 84 tail call void @llvm.dbg.value(metadata !{i32 %inc14}, i64 0, metadata !16), !dbg !37 85 %exitcond12 = icmp eq i32 %inc14, 30, !dbg !37 86 br i1 %exitcond12, label %for.inc16, label %for.cond4.preheader, !dbg !37 87 88for.inc16: ; preds = %for.inc13 89 %inc17 = add nsw i32 %a.08, 1, !dbg !31 90 tail call void @llvm.dbg.value(metadata !{i32 %inc17}, i64 0, metadata !14), !dbg !31 91 %exitcond13 = icmp eq i32 %inc17, 30, !dbg !31 92 br i1 %exitcond13, label %for.end18, label %for.cond1.preheader, !dbg !31 93 94for.end18: ; preds = %for.inc16 95 store i32 %and, i32* @c, align 4, !dbg !32, !tbaa !33 96 ret void, !dbg !42 97} 98 99; Function Attrs: nounwind readnone 100declare void @llvm.dbg.value(metadata, i64, metadata) #1 101 102attributes #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" } 103attributes #1 = { nounwind readnone } 104 105!llvm.dbg.cu = !{!0} 106!llvm.module.flags = !{!26} 107 108!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.4 (trunk 191700) (llvm/trunk 191710)", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"small.dwo"} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/echristo/tmp/small.c] [DW_LANG_C99] 109!1 = metadata !{metadata !"small.c", metadata !"/usr/local/google/home/echristo/tmp"} 110!2 = metadata !{i32 0} 111!3 = metadata !{metadata !4, metadata !8} 112!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"bar", metadata !"bar", metadata !"", i32 18, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 true, void ()* @bar, null, null, metadata !2, i32 19} ; [ DW_TAG_subprogram ] [line 18] [def] [scope 19] [bar] 113!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/usr/local/google/home/echristo/tmp/small.c] 114!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 115!7 = metadata !{null} 116!8 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"foo", metadata !"foo", metadata !"", i32 2, metadata !9, i1 true, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @foo, null, null, metadata !12, i32 3} ; [ DW_TAG_subprogram ] [line 2] [local] [def] [scope 3] [foo] 117!9 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !10, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 118!10 = metadata !{null, metadata !11} 119!11 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed] 120!12 = metadata !{metadata !13, metadata !14, metadata !15, metadata !16, metadata !18, metadata !19} 121!13 = metadata !{i32 786689, metadata !8, metadata !"p", metadata !5, i32 16777218, metadata !11, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [p] [line 2] 122!14 = metadata !{i32 786688, metadata !8, metadata !"a", metadata !5, i32 4, metadata !11, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [a] [line 4] 123!15 = metadata !{i32 786688, metadata !8, metadata !"b", metadata !5, i32 4, metadata !11, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [b] [line 4] 124!16 = metadata !{i32 786688, metadata !8, metadata !"d", metadata !5, i32 5, metadata !17, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [d] [line 5] 125!17 = metadata !{i32 786468, null, null, metadata !"unsigned int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 7} ; [ DW_TAG_base_type ] [unsigned int] [line 0, size 32, align 32, offset 0, enc DW_ATE_unsigned] 126!18 = metadata !{i32 786688, metadata !8, metadata !"e", metadata !5, i32 5, metadata !17, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [e] [line 5] 127!19 = metadata !{i32 786688, metadata !20, metadata !"w", metadata !5, i32 12, metadata !25, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [w] [line 12] 128!20 = metadata !{i32 786443, metadata !1, metadata !21, i32 11, i32 0, i32 4} ; [ DW_TAG_lexical_block ] [/usr/local/google/home/echristo/tmp/small.c] 129!21 = metadata !{i32 786443, metadata !1, metadata !22, i32 10, i32 0, i32 3} ; [ DW_TAG_lexical_block ] [/usr/local/google/home/echristo/tmp/small.c] 130!22 = metadata !{i32 786443, metadata !1, metadata !23, i32 9, i32 0, i32 2} ; [ DW_TAG_lexical_block ] [/usr/local/google/home/echristo/tmp/small.c] 131!23 = metadata !{i32 786443, metadata !1, metadata !24, i32 8, i32 0, i32 1} ; [ DW_TAG_lexical_block ] [/usr/local/google/home/echristo/tmp/small.c] 132!24 = metadata !{i32 786443, metadata !1, metadata !8, i32 7, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [/usr/local/google/home/echristo/tmp/small.c] 133!25 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from int] 134!26 = metadata !{i32 2, metadata !"Dwarf Version", i32 4} 135!27 = metadata !{i32 20, i32 0, metadata !4, null} 136!28 = metadata !{i32 21, i32 0, metadata !4, null} 137!29 = metadata !{i32 1} 138!30 = metadata !{i32 2, i32 0, metadata !8, null} 139!31 = metadata !{i32 7, i32 0, metadata !24, null} 140!32 = metadata !{i32 13, i32 0, metadata !20, null} 141!33 = metadata !{metadata !34, metadata !34, i64 0} 142!34 = metadata !{metadata !"int", metadata !35, i64 0} 143!35 = metadata !{metadata !"omnipotent char", metadata !36, i64 0} 144!36 = metadata !{metadata !"Simple C/C++ TBAA"} 145!37 = metadata !{i32 8, i32 0, metadata !23, null} ; [ DW_TAG_imported_declaration ] 146!38 = metadata !{i32 9, i32 0, metadata !22, null} 147!39 = metadata !{i32 10, i32 0, metadata !21, null} 148!40 = metadata !{i32 12, i32 0, metadata !20, null} 149!41 = metadata !{i32* @c} 150!42 = metadata !{i32 15, i32 0, metadata !8, null} 151