1; RUN: llc %s -mtriple=x86_64-unknown-unknown -o - | FileCheck %s 2 3; Generated with "clang -g -c -emit-llvm -S -O3" 4 5; This will test several features of merging debug locations. Importantly, 6; locations with the same source line but different scopes should be merged to 7; a line zero location at the nearest common scope and inlining. The location 8; of the single call to "common" (the two calls are collapsed together by 9; BranchFolding) should be attributed to line zero inside the wrapper2 inlined 10; scope within f1. 11 12; void common(); 13; inline void wrapper() { common(); } 14; extern bool b; 15; void sink(); 16; inline void wrapper2() { 17; if (b) { 18; sink(); 19; wrapper(); 20; } else 21; wrapper(); 22; } 23; void f1() { wrapper2(); } 24 25; Ensure there is only one inlined_subroutine (for wrapper2, none for wrapper) 26; & that its address range includes the call to 'common'. 27 28; CHECK: jmp _Z6commonv 29; CHECK-NEXT: [[LABEL:.*]]: 30 31; CHECK: .section .debug_info 32; CHECK: DW_TAG_subprogram 33; CHECK: DW_TAG_subprogram 34; CHECK-NOT: {{DW_TAG\|End Of Children}} 35; CHECK: DW_TAG_inlined_subroutine 36; CHECK-NOT: {{DW_TAG\|End Of Children}} 37; CHECK: [[LABEL]]-{{.*}} DW_AT_high_pc 38; CHECK-NOT: DW_TAG 39 40 41 42@b = external dso_local local_unnamed_addr global i8, align 1 43 44; Function Attrs: uwtable 45define dso_local void @_Z2f1v() local_unnamed_addr !dbg !7 { 46entry: 47 %0 = load i8, i8* @b, align 1, !dbg !10, !tbaa !14, !range !18 48 %tobool.i = icmp eq i8 %0, 0, !dbg !10 49 br i1 %tobool.i, label %if.else.i, label %if.then.i, !dbg !19 50 51if.then.i: ; preds = %entry 52 tail call void @_Z4sinkv(), !dbg !20 53 tail call void @_Z6commonv(), !dbg !22 54 br label %_Z8wrapper2v.exit, !dbg !25 55 56if.else.i: ; preds = %entry 57 tail call void @_Z6commonv(), !dbg !26 58 br label %_Z8wrapper2v.exit 59 60_Z8wrapper2v.exit: ; preds = %if.then.i, %if.else.i 61 ret void, !dbg !28 62} 63 64declare dso_local void @_Z4sinkv() local_unnamed_addr 65 66declare dso_local void @_Z6commonv() local_unnamed_addr 67 68!llvm.dbg.cu = !{!0} 69!llvm.module.flags = !{!3, !4, !5} 70!llvm.ident = !{!6} 71 72!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0 (trunk 340559) (llvm/trunk 340572)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) 73!1 = !DIFile(filename: "merge_loc.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch") 74!2 = !{} 75!3 = !{i32 2, !"Dwarf Version", i32 4} 76!4 = !{i32 2, !"Debug Info Version", i32 3} 77!5 = !{i32 1, !"wchar_size", i32 4} 78!6 = !{!"clang version 8.0.0 (trunk 340559) (llvm/trunk 340572)"} 79!7 = distinct !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !1, file: !1, line: 12, type: !8, isLocal: false, isDefinition: true, scopeLine: 12, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2) 80!8 = !DISubroutineType(types: !9) 81!9 = !{null} 82!10 = !DILocation(line: 6, column: 7, scope: !11, inlinedAt: !13) 83!11 = distinct !DILexicalBlock(scope: !12, file: !1, line: 6, column: 7) 84!12 = distinct !DISubprogram(name: "wrapper2", linkageName: "_Z8wrapper2v", scope: !1, file: !1, line: 5, type: !8, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2) 85!13 = distinct !DILocation(line: 13, column: 3, scope: !7) 86!14 = !{!15, !15, i64 0} 87!15 = !{!"bool", !16, i64 0} 88!16 = !{!"omnipotent char", !17, i64 0} 89!17 = !{!"Simple C++ TBAA"} 90!18 = !{i8 0, i8 2} 91!19 = !DILocation(line: 6, column: 7, scope: !12, inlinedAt: !13) 92!20 = !DILocation(line: 7, column: 5, scope: !21, inlinedAt: !13) 93!21 = distinct !DILexicalBlock(scope: !11, file: !1, line: 6, column: 10) 94!22 = !DILocation(line: 2, column: 25, scope: !23, inlinedAt: !24) 95!23 = distinct !DISubprogram(name: "wrapper", linkageName: "_Z7wrapperv", scope: !1, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2) 96!24 = distinct !DILocation(line: 8, column: 5, scope: !21, inlinedAt: !13) 97!25 = !DILocation(line: 9, column: 3, scope: !21, inlinedAt: !13) 98!26 = !DILocation(line: 2, column: 25, scope: !23, inlinedAt: !27) 99!27 = distinct !DILocation(line: 10, column: 5, scope: !11, inlinedAt: !13) 100!28 = !DILocation(line: 14, column: 1, scope: !7) 101