1; RUN: opt < %s -add-discriminators -S | FileCheck %s 2 3; Discriminator support for code that is written in one line: 4; #1 int foo(int i) { 5; #2 if (i == 3 || i == 5) return 100; else return 99; 6; #3 } 7 8; i == 3: discriminator 0 9; i == 5: discriminator 1 10; return 100: discriminator 2 11; return 99: discriminator 3 12 13define i32 @_Z3fooi(i32 %i) #0 !dbg !4 { 14 %1 = alloca i32, align 4 15 %2 = alloca i32, align 4 16 store i32 %i, i32* %2, align 4, !tbaa !13 17 call void @llvm.dbg.declare(metadata i32* %2, metadata !9, metadata !17), !dbg !18 18 %3 = load i32, i32* %2, align 4, !dbg !19, !tbaa !13 19 %4 = icmp eq i32 %3, 3, !dbg !21 20 br i1 %4, label %8, label %5, !dbg !22 21 22; <label>:5 ; preds = %0 23 %6 = load i32, i32* %2, align 4, !dbg !23, !tbaa !13 24; CHECK: %6 = load i32, i32* %2, align 4, !dbg ![[THEN1:[0-9]+]],{{.*}} 25 26 %7 = icmp eq i32 %6, 5, !dbg !24 27; CHECK: %7 = icmp eq i32 %6, 5, !dbg ![[THEN2:[0-9]+]] 28 29 br i1 %7, label %8, label %9, !dbg !25 30; CHECK: br i1 %7, label %8, label %9, !dbg ![[THEN3:[0-9]+]] 31 32; <label>:8 ; preds = %5, %0 33 store i32 100, i32* %1, align 4, !dbg !26 34; CHECK: store i32 100, i32* %1, align 4, !dbg ![[ELSE:[0-9]+]] 35 36 br label %10, !dbg !26 37; CHECK: br label %10, !dbg ![[ELSE]] 38 39; <label>:9 ; preds = %5 40 store i32 99, i32* %1, align 4, !dbg !27 41; CHECK: store i32 99, i32* %1, align 4, !dbg ![[COMBINE:[0-9]+]] 42 43 br label %10, !dbg !27 44; CHECK: br label %10, !dbg ![[COMBINE]] 45 46; <label>:10 ; preds = %9, %8 47 %11 = load i32, i32* %1, align 4, !dbg !28 48 ret i32 %11, !dbg !28 49} 50 51; Function Attrs: nounwind readnone 52declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 53 54attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" } 55attributes #1 = { nounwind readnone } 56 57; We should be able to add discriminators even in the absence of llvm.dbg.cu. 58; When using sample profiles, the front end will generate line tables but it 59; does not generate llvm.dbg.cu to prevent codegen from emitting debug info 60; to the final binary. 61; !llvm.dbg.cu = !{!0} 62!llvm.module.flags = !{!10, !11} 63!llvm.ident = !{!12} 64 65!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 250915)", isOptimized: true, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3) 66!1 = !DIFile(filename: "a.cc", directory: "/usr/local/google/home/dehao/discr") 67!2 = !{} 68!3 = !{!4} 69!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooi", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, variables: !8) 70!5 = !DISubroutineType(types: !6) 71!6 = !{!7, !7} 72!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 73!8 = !{!9} 74!9 = !DILocalVariable(name: "i", arg: 1, scope: !4, file: !1, line: 1, type: !7) 75!10 = !{i32 2, !"Dwarf Version", i32 4} 76!11 = !{i32 2, !"Debug Info Version", i32 3} 77!12 = !{!"clang version 3.8.0 (trunk 250915)"} 78!13 = !{!14, !14, i64 0} 79!14 = !{!"int", !15, i64 0} 80!15 = !{!"omnipotent char", !16, i64 0} 81!16 = !{!"Simple C/C++ TBAA"} 82!17 = !DIExpression() 83!18 = !DILocation(line: 1, column: 13, scope: !4) 84!19 = !DILocation(line: 2, column: 7, scope: !20) 85!20 = distinct !DILexicalBlock(scope: !4, file: !1, line: 2, column: 7) 86!21 = !DILocation(line: 2, column: 9, scope: !20) 87!22 = !DILocation(line: 2, column: 14, scope: !20) 88!23 = !DILocation(line: 2, column: 17, scope: !20) 89!24 = !DILocation(line: 2, column: 19, scope: !20) 90!25 = !DILocation(line: 2, column: 7, scope: !4) 91!26 = !DILocation(line: 2, column: 25, scope: !20) 92!27 = !DILocation(line: 2, column: 42, scope: !20) 93!28 = !DILocation(line: 3, column: 1, scope: !4) 94 95; CHECK: ![[THEN1]] = !DILocation(line: 2, column: 17, scope: ![[THENBLOCK:[0-9]+]]) 96; CHECK: ![[THENBLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 1) 97; CHECK: ![[THEN2]] = !DILocation(line: 2, column: 19, scope: ![[THENBLOCK]]) 98; CHECK: ![[THEN3]] = !DILocation(line: 2, column: 7, scope: ![[THENBLOCK]]) 99; CHECK: ![[ELSE]] = !DILocation(line: 2, column: 25, scope: ![[ELSEBLOCK:[0-9]+]]) 100; CHECK: ![[ELSEBLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 2) 101; CHECK: ![[COMBINE]] = !DILocation(line: 2, column: 42, scope: ![[COMBINEBLOCK:[0-9]+]]) 102; CHECK: ![[COMBINEBLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 3) 103