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 [DW_FORM_data4]	([[F_LOC:0x[0-9]*]])
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;
36; CHECK: debug_loc contents
37; CHECK:         [[F_LOC]]: Beginning
38; CHECK-NEXT:               Ending
39; CHECK-NEXT: Location description: 74 00
40; CHECK:         [[G_LOC]]: Beginning
41; CHECK-NEXT:               Ending
42; CHECK-NEXT: Location description: 74 00
43
44%"struct.pr14763::foo" = type { i8 }
45
46; Function Attrs: uwtable
47define void @_ZN7pr147634funcENS_3fooE(%"struct.pr14763::foo"* noalias sret %agg.result, %"struct.pr14763::foo"* %f) #0 !dbg !4 {
48entry:
49  call void @llvm.dbg.declare(metadata %"struct.pr14763::foo"* %f, metadata !22, metadata !DIExpression(DW_OP_deref)), !dbg !24
50  call void @_ZN7pr147633fooC1ERKS0_(%"struct.pr14763::foo"* %agg.result, %"struct.pr14763::foo"* %f), !dbg !25
51  ret void, !dbg !25
52}
53
54; Function Attrs: nounwind readnone
55declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
56
57declare void @_ZN7pr147633fooC1ERKS0_(%"struct.pr14763::foo"*, %"struct.pr14763::foo"*) #2
58
59; Function Attrs: uwtable
60define void @_ZN7pr147635func2EbNS_3fooE(i1 zeroext %b, %"struct.pr14763::foo"* %g) #0 !dbg !17 {
61entry:
62  %b.addr = alloca i8, align 1
63  %frombool = zext i1 %b to i8
64  store i8 %frombool, i8* %b.addr, align 1
65  call void @llvm.dbg.declare(metadata i8* %b.addr, metadata !26, metadata !DIExpression()), !dbg !27
66  call void @llvm.dbg.declare(metadata %"struct.pr14763::foo"* %g, metadata !28, metadata !DIExpression(DW_OP_deref)), !dbg !27
67  %0 = load i8, i8* %b.addr, align 1, !dbg !29
68  %tobool = trunc i8 %0 to i1, !dbg !29
69  br i1 %tobool, label %if.then, label %if.end, !dbg !29
70
71if.then:                                          ; preds = %entry
72  %1 = bitcast %"struct.pr14763::foo"* %g to i8*, !dbg !31
73  call void @_ZN7pr147634sinkEPv(i8* %1), !dbg !31
74  br label %if.end, !dbg !31
75
76if.end:                                           ; preds = %if.then, %entry
77  ret void, !dbg !32
78}
79
80declare void @_ZN7pr147634sinkEPv(i8*) #2
81
82attributes #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" }
83attributes #1 = { nounwind readnone }
84attributes #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" }
85
86!llvm.dbg.cu = !{!0}
87!llvm.module.flags = !{!21, !33}
88
89!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)
90!1 = !DIFile(filename: "pass.cpp", directory: "/tmp")
91!2 = !{}
92!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, variables: !2)
93!5 = !DINamespace(name: "pr14763", line: 1, file: !1, scope: null)
94!6 = !DISubroutineType(types: !7)
95!7 = !{!8, !8}
96!8 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", line: 2, size: 8, align: 8, file: !1, scope: !5, elements: !9)
97!9 = !{!10}
98!10 = !DISubprogram(name: "foo", line: 3, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !8, type: !11)
99!11 = !DISubroutineType(types: !12)
100!12 = !{null, !13, !14}
101!13 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !8)
102!14 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !15)
103!15 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !8)
104!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, variables: !2)
105!18 = !DISubroutineType(types: !19)
106!19 = !{null, !20, !8}
107!20 = !DIBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean)
108!21 = !{i32 2, !"Dwarf Version", i32 3}
109!22 = !DILocalVariable(name: "f", line: 6, arg: 1, scope: !4, file: !23, type: !8)
110!23 = !DIFile(filename: "pass.cpp", directory: "/tmp")
111!24 = !DILocation(line: 6, scope: !4)
112!25 = !DILocation(line: 7, scope: !4)
113!26 = !DILocalVariable(name: "b", line: 12, arg: 1, scope: !17, file: !23, type: !20)
114!27 = !DILocation(line: 12, scope: !17)
115!28 = !DILocalVariable(name: "g", line: 12, arg: 2, scope: !17, file: !23, type: !8)
116!29 = !DILocation(line: 13, scope: !30)
117!30 = distinct !DILexicalBlock(line: 13, column: 0, file: !1, scope: !17)
118!31 = !DILocation(line: 14, scope: !30)
119!32 = !DILocation(line: 15, scope: !17)
120!33 = !{i32 1, !"Debug Info Version", i32 3}
121