1 ; RUN: opt < %s -add-discriminators -S | FileCheck %s 2 ; RUN: opt < %s -passes=add-discriminators -S | FileCheck %s 3 4 ; We should not generate discriminators for DWARF versions prior to 4. 5 ; 6 ; Original code: 7 ; 8 ; int foo(long i) { 9 ; if (i < 5) return 2; else return 90; 10 ; } 11 ; 12 ; None of the !dbg nodes associated with the if() statement should be 13 ; altered. If they are, it means that the discriminators pass added a 14 ; new lexical scope. 15 16 define i32 @foo(i64 %i) #0 !dbg !4 { 17 entry: 18 %retval = alloca i32, align 4 19 %i.addr = alloca i64, align 8 20 store i64 %i, i64* %i.addr, align 8 21 call void @llvm.dbg.declare(metadata i64* %i.addr, metadata !13, metadata !DIExpression()), !dbg !14 22 %0 = load i64, i64* %i.addr, align 8, !dbg !15 23 ; CHECK: %0 = load i64, i64* %i.addr, align 8, !dbg ![[ENTRY:[0-9]+]] 24 %cmp = icmp slt i64 %0, 5, !dbg !15 25 ; CHECK: %cmp = icmp slt i64 %0, 5, !dbg ![[ENTRY:[0-9]+]] 26 br i1 %cmp, label %if.then, label %if.else, !dbg !15 27 ; CHECK: br i1 %cmp, label %if.then, label %if.else, !dbg ![[ENTRY:[0-9]+]] 28 29 if.then: ; preds = %entry 30 store i32 2, i32* %retval, !dbg !15 31 br label %return, !dbg !15 32 33 if.else: ; preds = %entry 34 store i32 90, i32* %retval, !dbg !15 35 br label %return, !dbg !15 36 37 return: ; preds = %if.else, %if.then 38 %1 = load i32, i32* %retval, !dbg !17 39 ret i32 %1, !dbg !17 40 } 41 42 ; Function Attrs: nounwind readnone 43 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 44 45 attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 46 attributes #1 = { nounwind readnone } 47 48 ; We should be able to add discriminators even in the absence of llvm.dbg.cu. 49 ; When using sample profiles, the front end will generate line tables but it 50 ; does not generate llvm.dbg.cu to prevent codegen from emitting debug info 51 ; to the final binary. 52 !llvm.dbg.cu = !{!0} 53 !llvm.module.flags = !{!10, !11} 54 !llvm.ident = !{!12} 55 56 ; CHECK: !{i32 2, !"Dwarf Version", i32 2} 57 !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 58 !1 = !DIFile(filename: "no-discriminators", directory: ".") 59 !2 = !{} 60 !4 = distinct !DISubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2) 61 ; CHECK: ![[FOO:[0-9]+]] = distinct !DISubprogram(name: "foo" 62 !5 = !DIFile(filename: "no-discriminators", directory: ".") 63 !6 = !DISubroutineType(types: !7) 64 !7 = !{!8, !9} 65 !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 66 !9 = !DIBasicType(tag: DW_TAG_base_type, name: "long int", size: 64, align: 64, encoding: DW_ATE_signed) 67 !10 = !{i32 2, !"Dwarf Version", i32 2} 68 !11 = !{i32 1, !"Debug Info Version", i32 3} 69 !12 = !{!"clang version 3.5.0 "} 70 !13 = !DILocalVariable(name: "i", line: 1, arg: 1, scope: !4, file: !5, type: !9) 71 !14 = !DILocation(line: 1, scope: !4) 72 !15 = !DILocation(line: 2, scope: !16) 73 ; CHECK: ![[ENTRY]] = !DILocation(line: 2, scope: ![[BLOCK:[0-9]+]]) 74 !16 = distinct !DILexicalBlock(line: 2, column: 0, file: !1, scope: !4) 75 ; CHECK: ![[BLOCK]] = distinct !DILexicalBlock(scope: ![[FOO]],{{.*}} line: 2) 76 !17 = !DILocation(line: 3, scope: !4) 77
