1; Make sure the backend generates a single DIE and uses ref_addr. 2; CHECK: 0x[[BASE:.*]]: DW_TAG_structure_type 3; CHECK-NEXT: DW_AT_name {{.*}}"Base" 4; CHECK-NOT: DW_TAG_structure_type 5; CHECK: 0x[[INT:.*]]: DW_TAG_base_type 6; CHECK-NEXT: DW_AT_name {{.*}}"int" 7; CHECK-NOT: DW_TAG_base_type 8 9; CHECK: DW_TAG_compile_unit 10; CHECK: DW_TAG_formal_parameter 11; CHECK: DW_AT_type [DW_FORM_ref_addr] {{.*}}[[INT]] 12; CHECK: DW_TAG_variable 13; CHECK: DW_AT_type [DW_FORM_ref_addr] {{.*}}[[BASE]] 14 15; Make sure llvm-link only generates a single copy of the struct. 16; LINK: DW_TAG_structure_type 17; LINK-NOT: DW_TAG_structure_type 18 19; Content of header files: 20; struct Base { 21; int a; 22; Base *b; 23; }; 24; Content of foo.cpp: 25; 26; #include "a.hpp" 27; void f(int a) { 28; Base t; 29; } 30; Content of bar.cpp: 31; 32; #include "a.hpp" 33; void f(int); 34; void g(int a) { 35; Base t; 36; } 37; int main() { 38; f(0); 39; g(1); 40; return 0; 41; } 42; ModuleID = 'foo.cpp' 43 44%struct.Base = type { i32, ptr } 45 46; Function Attrs: nounwind ssp uwtable 47define void @_Z1fi(i32 %a) #0 !dbg !12 { 48entry: 49 %a.addr = alloca i32, align 4 50 %t = alloca %struct.Base, align 8 51 store i32 %a, ptr %a.addr, align 4 52 call void @llvm.dbg.declare(metadata ptr %a.addr, metadata !17, metadata !DIExpression()), !dbg !18 53 call void @llvm.dbg.declare(metadata ptr %t, metadata !19, metadata !DIExpression()), !dbg !20 54 ret void, !dbg !21 55} 56 57; Function Attrs: nounwind readnone 58declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 59 60attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 61attributes #1 = { nounwind readnone } 62 63!llvm.dbg.cu = !{!0} 64!llvm.module.flags = !{!16, !22} 65 66!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !2, imports: !2) 67!1 = !DIFile(filename: "foo.cpp", directory: ".") 68!2 = !{} 69!3 = !{!4} 70!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "Base", line: 1, file: !5, elements: !6, identifier: "_ZTS4Base") 71!5 = !DIFile(filename: "./a.hpp", directory: ".") 72!6 = !{!7, !9} 73!7 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 2, size: 32, align: 32, file: !5, scope: !4, baseType: !8) 74!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 75!9 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 3, size: 64, align: 64, offset: 64, file: !5, scope: !4, baseType: !10) 76!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4) 77!12 = distinct !DISubprogram(name: "f", linkageName: "_Z1fi", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 3, file: !1, scope: !13, type: !14, retainedNodes: !2) 78!13 = !DIFile(filename: "foo.cpp", directory: ".") 79!14 = !DISubroutineType(types: !15) 80!15 = !{null, !8} 81!16 = !{i32 2, !"Dwarf Version", i32 3} 82!17 = !DILocalVariable(name: "a", line: 3, arg: 1, scope: !12, file: !13, type: !8) 83!18 = !DILocation(line: 3, scope: !12) 84!19 = !DILocalVariable(name: "t", line: 4, scope: !12, file: !13, type: !4) 85!20 = !DILocation(line: 4, scope: !12) 86!21 = !DILocation(line: 5, scope: !12) 87!22 = !{i32 1, !"Debug Info Version", i32 3} 88