1; 2; RUN: llc -mtriple=x86_64-unknown-linux-gnu -O0 -filetype=obj %s -o - | llvm-dwarfdump -v -debug-info - | FileCheck %s 3; RUN: llc --try-experimental-debuginfo-iterators -mtriple=x86_64-unknown-linux-gnu -O0 -filetype=obj %s -o - | llvm-dwarfdump -v -debug-info - | FileCheck %s 4 5; Test case derived from compiling the following source with clang -g: 6; 7; namespace pr14763 { 8; struct foo { 9; foo(const foo&); 10; }; 11; 12; foo func(foo f) { 13; return f; // reference 'f' for now because otherwise we hit another bug 14; } 15; 16; void sink(ptr); 17; 18; void func2(bool b, foo g) { 19; if (b) 20; sink(&g); // reference 'f' for now because otherwise we hit another bug 21; } 22; } 23 24; CHECK: debug_info contents 25; The parameter is accessed indirectly (with a zero offset) from the second 26; register parameter. RDI is consumed by 'sret'. 27; CHECK: DW_TAG_subprogram 28; CHECK: DW_AT_name{{.*}} = "func" 29; CHECK: DW_TAG_formal_parameter 30; CHECK: DW_AT_location {{.*}} 31; CHECK-NEXT: DW_OP_breg4 RSI+0, DW_OP_deref 32; CHECK-NOT: DW_TAG 33; CHECK: DW_AT_name{{.*}} = "f" 34 35; CHECK: DW_TAG_subprogram 36; CHECK: DW_AT_name{{.*}} = "func2" 37; CHECK: DW_TAG_formal_parameter 38; CHECK: DW_AT_location{{.*}}(DW_OP_fbreg +23) 39; CHECK: DW_TAG_formal_parameter 40; CHECK: DW_AT_location{{.*}}( 41; CHECK-NEXT: {{.*}}: DW_OP_breg7 RSP+8, DW_OP_deref, DW_OP_deref 42; CHECK-NEXT: {{.*}}: DW_OP_breg4 RSI+0, DW_OP_deref 43; CHECK-NEXT: {{.*}}: DW_OP_breg7 RSP+8, DW_OP_deref, DW_OP_deref) 44; CHECK-NOT: DW_TAG 45; CHECK: DW_AT_name{{.*}} = "g" 46 47%"struct.pr14763::foo" = type { i8 } 48 49; Function Attrs: uwtable 50define void @_ZN7pr147634funcENS_3fooE(ptr noalias sret(%"struct.pr14763::foo") %agg.result, ptr %f) #0 !dbg !4 { 51entry: 52 call void @llvm.dbg.declare(metadata ptr %f, metadata !22, metadata !DIExpression(DW_OP_deref)), !dbg !24 53 call void @_ZN7pr147633fooC1ERKS0_(ptr %agg.result, ptr %f), !dbg !25 54 ret void, !dbg !25 55} 56 57; Function Attrs: nounwind readnone 58declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 59 60declare void @_ZN7pr147633fooC1ERKS0_(ptr, ptr) #2 61 62; Function Attrs: uwtable 63define void @_ZN7pr147635func2EbNS_3fooE(i1 zeroext %b, ptr %g) #0 !dbg !17 { 64entry: 65 %b.addr = alloca i8, align 1 66 %frombool = zext i1 %b to i8 67 store i8 %frombool, ptr %b.addr, align 1 68 call void @llvm.dbg.declare(metadata ptr %b.addr, metadata !26, metadata !DIExpression()), !dbg !27 69 call void @llvm.dbg.declare(metadata ptr %g, metadata !28, metadata !DIExpression(DW_OP_deref)), !dbg !27 70 %0 = load i8, ptr %b.addr, align 1, !dbg !29 71 %tobool = trunc i8 %0 to i1, !dbg !29 72 br i1 %tobool, label %if.then, label %if.end, !dbg !29 73 74if.then: ; preds = %entry 75 call void @_ZN7pr147634sinkEPv(ptr %g), !dbg !31 76 br label %if.end, !dbg !31 77 78if.end: ; preds = %if.then, %entry 79 ret void, !dbg !32 80} 81 82declare void @_ZN7pr147634sinkEPv(ptr) 83 84attributes #0 = { uwtable } 85attributes #1 = { nounwind readnone } 86 87!llvm.dbg.cu = !{!0} 88!llvm.module.flags = !{!21, !33} 89 90!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 91!1 = !DIFile(filename: "pass.cpp", directory: "/tmp") 92!2 = !{} 93!4 = distinct !DISubprogram(name: "func", linkageName: "_ZN7pr147634funcENS_3fooE", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 6, file: !1, scope: !5, type: !6, retainedNodes: !2) 94!5 = !DINamespace(name: "pr14763", scope: null) 95!6 = !DISubroutineType(types: !7) 96!7 = !{!8, !8} 97!8 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", line: 2, size: 8, align: 8, file: !1, scope: !5, elements: !9) 98!9 = !{!10} 99!10 = !DISubprogram(name: "foo", line: 3, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !8, type: !11) 100!11 = !DISubroutineType(types: !12) 101!12 = !{null, !13, !14} 102!13 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !8) 103!14 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !15) 104!15 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !8) 105!17 = distinct !DISubprogram(name: "func2", linkageName: "_ZN7pr147635func2EbNS_3fooE", line: 12, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 12, file: !1, scope: !5, type: !18, retainedNodes: !2) 106!18 = !DISubroutineType(types: !19) 107!19 = !{null, !20, !8} 108!20 = !DIBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean) 109!21 = !{i32 2, !"Dwarf Version", i32 3} 110!22 = !DILocalVariable(name: "f", line: 6, arg: 1, scope: !4, file: !23, type: !8) 111!23 = !DIFile(filename: "pass.cpp", directory: "/tmp") 112!24 = !DILocation(line: 6, scope: !4) 113!25 = !DILocation(line: 7, scope: !4) 114!26 = !DILocalVariable(name: "b", line: 12, arg: 1, scope: !17, file: !23, type: !20) 115!27 = !DILocation(line: 12, scope: !17) 116!28 = !DILocalVariable(name: "g", line: 12, arg: 2, scope: !17, file: !23, type: !8) 117!29 = !DILocation(line: 13, scope: !30) 118!30 = distinct !DILexicalBlock(line: 13, column: 0, file: !1, scope: !17) 119!31 = !DILocation(line: 14, scope: !30) 120!32 = !DILocation(line: 15, scope: !17) 121!33 = !{i32 1, !"Debug Info Version", i32 3} 122