1; REQUIRES: object-emission 2; 3; RUN: llc -mtriple=x86_64-unknown-linux-gnu -O0 -filetype=obj < %s > %t 4; RUN: llvm-dwarfdump %t | FileCheck %s 5 6; Test case derived from compiling the following source with clang -g: 7; 8; namespace pr14763 { 9; struct foo { 10; foo(const foo&); 11; }; 12; 13; foo func(foo f) { 14; return f; // reference 'f' for now because otherwise we hit another bug 15; } 16; 17; void sink(void*); 18; 19; void func2(bool b, foo g) { 20; if (b) 21; sink(&g); // reference 'f' for now because otherwise we hit another bug 22; } 23; } 24 25; CHECK: debug_info contents 26; 0x74 is DW_OP_breg4, showing that the parameter is accessed indirectly 27; (with a zero offset) from the register parameter 28; CHECK: DW_AT_location{{.*}}(<0x0{{.}}> 74 00 29; CHECK-NOT: DW_TAG 30; CHECK: DW_AT_name{{.*}} = "f" 31 32; CHECK: DW_AT_location{{.*}}([[G_LOC:0x[0-9]*]]) 33; CHECK-NOT: DW_TAG 34; CHECK: DW_AT_name{{.*}} = "g" 35; CHECK: debug_loc contents 36; CHECK-NEXT: [[G_LOC]]: Beginning 37; CHECK-NEXT: Ending 38; CHECK-NEXT: Location description: 74 00 39 40%"struct.pr14763::foo" = type { i8 } 41 42; Function Attrs: uwtable 43define void @_ZN7pr147634funcENS_3fooE(%"struct.pr14763::foo"* noalias sret %agg.result, %"struct.pr14763::foo"* %f) #0 !dbg !4 { 44entry: 45 call void @llvm.dbg.declare(metadata %"struct.pr14763::foo"* %f, metadata !22, metadata !DIExpression(DW_OP_deref)), !dbg !24 46 call void @_ZN7pr147633fooC1ERKS0_(%"struct.pr14763::foo"* %agg.result, %"struct.pr14763::foo"* %f), !dbg !25 47 ret void, !dbg !25 48} 49 50; Function Attrs: nounwind readnone 51declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 52 53declare void @_ZN7pr147633fooC1ERKS0_(%"struct.pr14763::foo"*, %"struct.pr14763::foo"*) #2 54 55; Function Attrs: uwtable 56define void @_ZN7pr147635func2EbNS_3fooE(i1 zeroext %b, %"struct.pr14763::foo"* %g) #0 !dbg !17 { 57entry: 58 %b.addr = alloca i8, align 1 59 %frombool = zext i1 %b to i8 60 store i8 %frombool, i8* %b.addr, align 1 61 call void @llvm.dbg.declare(metadata i8* %b.addr, metadata !26, metadata !DIExpression()), !dbg !27 62 call void @llvm.dbg.declare(metadata %"struct.pr14763::foo"* %g, metadata !28, metadata !DIExpression(DW_OP_deref)), !dbg !27 63 %0 = load i8, i8* %b.addr, align 1, !dbg !29 64 %tobool = trunc i8 %0 to i1, !dbg !29 65 br i1 %tobool, label %if.then, label %if.end, !dbg !29 66 67if.then: ; preds = %entry 68 %1 = bitcast %"struct.pr14763::foo"* %g to i8*, !dbg !31 69 call void @_ZN7pr147634sinkEPv(i8* %1), !dbg !31 70 br label %if.end, !dbg !31 71 72if.end: ; preds = %if.then, %entry 73 ret void, !dbg !32 74} 75 76declare void @_ZN7pr147634sinkEPv(i8*) #2 77 78attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" } 79attributes #1 = { nounwind readnone } 80attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" } 81 82!llvm.dbg.cu = !{!0} 83!llvm.module.flags = !{!21, !33} 84 85!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) 86!1 = !DIFile(filename: "pass.cpp", directory: "/tmp") 87!2 = !{} 88!3 = !{!4, !17} 89!4 = distinct !DISubprogram(name: "func", linkageName: "_ZN7pr147634funcENS_3fooE", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 6, file: !1, scope: !5, type: !6, variables: !2) 90!5 = !DINamespace(name: "pr14763", line: 1, file: !1, scope: null) 91!6 = !DISubroutineType(types: !7) 92!7 = !{!8, !8} 93!8 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", line: 2, size: 8, align: 8, file: !1, scope: !5, elements: !9) 94!9 = !{!10} 95!10 = !DISubprogram(name: "foo", line: 3, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !8, type: !11) 96!11 = !DISubroutineType(types: !12) 97!12 = !{null, !13, !14} 98!13 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !8) 99!14 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !15) 100!15 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !8) 101!17 = distinct !DISubprogram(name: "func2", linkageName: "_ZN7pr147635func2EbNS_3fooE", line: 12, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 12, file: !1, scope: !5, type: !18, variables: !2) 102!18 = !DISubroutineType(types: !19) 103!19 = !{null, !20, !8} 104!20 = !DIBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean) 105!21 = !{i32 2, !"Dwarf Version", i32 3} 106!22 = !DILocalVariable(name: "f", line: 6, arg: 1, scope: !4, file: !23, type: !8) 107!23 = !DIFile(filename: "pass.cpp", directory: "/tmp") 108!24 = !DILocation(line: 6, scope: !4) 109!25 = !DILocation(line: 7, scope: !4) 110!26 = !DILocalVariable(name: "b", line: 12, arg: 1, scope: !17, file: !23, type: !20) 111!27 = !DILocation(line: 12, scope: !17) 112!28 = !DILocalVariable(name: "g", line: 12, arg: 2, scope: !17, file: !23, type: !8) 113!29 = !DILocation(line: 13, scope: !30) 114!30 = distinct !DILexicalBlock(line: 13, column: 0, file: !1, scope: !17) 115!31 = !DILocation(line: 14, scope: !30) 116!32 = !DILocation(line: 15, scope: !17) 117!33 = !{i32 1, !"Debug Info Version", i32 3} 118