1; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -v -debug-info - | FileCheck %s
2
3; Testing that two distinct (distinct by writing them in separate files, while
4; still fulfilling C++'s ODR by having identical token sequences) functions,
5; linked under LTO, get plausible debug info (and don't crash).
6
7; Built from source:
8; $ clang++ a.cpp b.cpp -g -c -emit-llvm
9; $ llvm-link a.bc b.bc -o ab.bc
10
11; This change is intended to tickle a case where the subprogram MDNode
12; associated with the llvm::Function will differ from the subprogram
13; referenced by the DbgLocs in the function.
14
15; $ sed -ie "s/!12, !0/!0, !12/" ab.ll
16; $ cat a.cpp
17; inline int func(int i) {
18;   return i * 2;
19; }
20; int (*x)(int) = &func;
21; $ cat b.cpp
22; inline int func(int i) {
23;   return i * 2;
24; }
25; int (*y)(int) = &func;
26
27; The DISubprogram should show up in compile unit a.
28; CHECK: DW_TAG_compile_unit
29; CHECK-NOT: DW_TAG
30; CHECK:    DW_AT_name {{.*}}"b.cpp"
31; CHECK-NOT: DW_TAG_subprogram
32
33; CHECK: DW_TAG_compile_unit
34; CHECK-NOT: DW_TAG
35; CHECK:     DW_AT_name {{.*}}"a.cpp"
36; CHECK:     DW_AT_name {{.*}} "func"
37
38source_filename = "test/DebugInfo/Generic/cross-cu-linkonce-distinct.ll"
39
40@x = global i32 (i32)* @_Z4funci, align 8, !dbg !0
41@y = global i32 (i32)* @_Z4funci, align 8, !dbg !7
42
43; Function Attrs: inlinehint nounwind uwtable
44define linkonce_odr i32 @_Z4funci(i32 %i) #0 !dbg !18 {
45  %1 = alloca i32, align 4
46  store i32 %i, i32* %1, align 4
47  call void @llvm.dbg.declare(metadata i32* %1, metadata !19, metadata !20), !dbg !21
48  %2 = load i32, i32* %1, align 4, !dbg !22
49  %3 = mul nsw i32 %2, 2, !dbg !22
50  ret i32 %3, !dbg !22
51}
52
53; Function Attrs: nounwind readnone
54declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
55
56attributes #0 = { inlinehint nounwind uwtable }
57attributes #1 = { nounwind readnone }
58
59!llvm.dbg.cu = !{!10, !13}
60!llvm.module.flags = !{!15, !16}
61!llvm.ident = !{!17, !17}
62
63!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
64!1 = !DIGlobalVariable(name: "x", scope: null, file: !2, line: 4, type: !3, isLocal: false, isDefinition: true)
65!2 = !DIFile(filename: "a.cpp", directory: "/tmp/dbginfo")
66!3 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64)
67!4 = !DISubroutineType(types: !5)
68!5 = !{!6, !6}
69!6 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
70!7 = !DIGlobalVariableExpression(var: !8, expr: !DIExpression())
71!8 = !DIGlobalVariable(name: "y", scope: null, file: !9, line: 4, type: !3, isLocal: false, isDefinition: true)
72!9 = !DIFile(filename: "b.cpp", directory: "/tmp/dbginfo")
73!10 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !9, producer: "clang version 3.5.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !11, retainedTypes: !11, globals: !12, imports: !11)
74!11 = !{}
75!12 = !{!7}
76!13 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 3.5.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !11, retainedTypes: !11, globals: !14, imports: !11)
77!14 = !{!0}
78!15 = !{i32 2, !"Dwarf Version", i32 4}
79!16 = !{i32 1, !"Debug Info Version", i32 3}
80!17 = !{!"clang version 3.5.0 "}
81!18 = distinct !DISubprogram(name: "func", linkageName: "_Z4funci", scope: !2, file: !2, line: 1, type: !4, isLocal: false, isDefinition: true, scopeLine: 1, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !13, retainedNodes: !11)
82!19 = !DILocalVariable(name: "i", arg: 1, scope: !18, file: !2, line: 1, type: !6)
83!20 = !DIExpression()
84!21 = !DILocation(line: 1, scope: !18)
85!22 = !DILocation(line: 2, scope: !18)
86
87