1 ; REQUIRES: object-emission
3 ; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -v -debug-info - | FileCheck %s
5 ; Build from the following source with clang -O2.
7 ; The important details are that 'x's abstract definition is first built during
8 ; the definition of 'b', where the parameter to 'x' is constant and so 'x's 's'
9 ; variable is optimized away. No abstract definition DIE for 's' is constructed.
10 ; Then, during 'a' emission, the abstract DbgVariable for 's' is created, but
11 ; the abstract DIE isn't (since the abstract definition for 'b' is already
12 ; built). This results in 's' inlined in 'a' being emitted with its name, line,
13 ; file there, rather than referencing an abstract definition.
19 ; inline void x(bool b) {
35 ; CHECK: [[X_DECL:.*]]: DW_TAG_subprogram
37 ; CHECK: DW_AT_name {{.*}} "x"
38 ; CHECK-NOT: {{DW_TAG|NULL}}
39 ; CHECK: DW_TAG_formal_parameter
41 ; CHECK: DW_AT_name {{.*}} "b"
42 ; CHECK-NOT: {{DW_TAG|NULL}}
43 ; CHECK: DW_TAG_lexical_block
44 ; CHECK-NOT: {{DW_TAG|NULL}}
45 ; CHECK: DW_TAG_variable
47 ; CHECK: DW_AT_name {{.*}} "s"
49 ; CHECK: DW_TAG_subprogram
51 ; CHECK: DW_AT_name {{.*}} "b"
52 ; CHECK-NOT: {{DW_TAG|NULL}}
53 ; CHECK: DW_TAG_inlined_subroutine
55 ; CHECK: DW_AT_abstract_origin {{.*}} {[[X_DECL]]}
56 ; CHECK-NOT: {{DW_TAG|NULL}}
57 ; CHECK: DW_TAG_formal_parameter
59 ; CHECK: DW_AT_abstract_origin {{.*}} "b"
60 ; Notice 'x's local variable 's' is missing. Not necessarily a bug here,
61 ; since it's been optimized entirely away and it should be described in
62 ; abstract subprogram.
68 ; CHECK: DW_TAG_subprogram
70 ; CHECK: DW_AT_name {{.*}} "a"
71 ; CHECK-NOT: {{DW_TAG|NULL}}
72 ; CHECK: DW_TAG_formal_parameter
73 ; CHECK-NOT: {{DW_TAG|NULL}}
74 ; CHECK: DW_TAG_inlined_subroutine
76 ; CHECK: DW_AT_abstract_origin {{.*}} {[[X_DECL]]}
77 ; CHECK-NOT: {{DW_TAG|NULL}}
78 ; FIXME: This formal parameter goes missing at least at -O2 (& on
79 ; mips/powerpc), maybe before that. Perhaps SelectionDAG is to blame (and
81 ; CHECK: DW_TAG_formal_parameter
83 ; CHECK: DW_AT_abstract_origin {{.*}} "b"
85 ; CHECK-NOT: {{DW_TAG|NULL}}
86 ; CHECK: DW_TAG_lexical_block
87 ; CHECK-NOT: {{DW_TAG|NULL}}
88 ; CHECK: DW_TAG_variable
90 ; CHECK: DW_AT_abstract_origin {{.*}} "s"
92 @t = external global i32
94 ; Function Attrs: uwtable
95 define void @_Z1bv() #0 !dbg !4 {
97 tail call void @llvm.dbg.value(metadata i1 false, metadata !25, metadata !DIExpression()), !dbg !27
98 tail call void @_Z1fi(i32 0), !dbg !28
102 ; Function Attrs: uwtable
103 define void @_Z1ab(i1 zeroext %u) #0 !dbg !8 {
105 tail call void @llvm.dbg.value(metadata i1 %u, metadata !13, metadata !DIExpression()), !dbg !30
106 tail call void @llvm.dbg.value(metadata i1 %u, metadata !31, metadata !DIExpression()), !dbg !33
107 br i1 %u, label %if.then.i, label %_Z1xb.exit, !dbg !34
109 if.then.i: ; preds = %entry
110 %0 = load i32, i32* @t, align 4, !dbg !35, !tbaa !36
111 tail call void @llvm.dbg.value(metadata i32 %0, metadata !40, metadata !DIExpression()), !dbg !35
112 tail call void @_Z1fi(i32 %0), !dbg !41
113 br label %_Z1xb.exit, !dbg !42
115 _Z1xb.exit: ; preds = %entry, %if.then.i
116 tail call void @_Z1fi(i32 0), !dbg !43
120 declare void @_Z1fi(i32) #1
122 ; Function Attrs: nounwind readnone
123 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
125 attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
126 attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
127 attributes #2 = { nounwind readnone }
130 !llvm.module.flags = !{!21, !22}
133 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
134 !1 = !DIFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo")
136 !4 = distinct !DISubprogram(name: "b", linkageName: "_Z1bv", line: 13, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 13, file: !1, scope: !5, type: !6, retainedNodes: !2)
137 !5 = !DIFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo")
138 !6 = !DISubroutineType(types: !7)
140 !8 = distinct !DISubprogram(name: "a", linkageName: "_Z1ab", line: 17, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 17, file: !1, scope: !5, type: !9, retainedNodes: !12)
141 !9 = !DISubroutineType(types: !10)
143 !11 = !DIBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean)
145 !13 = !DILocalVariable(name: "u", line: 17, arg: 1, scope: !8, file: !5, type: !11)
146 !14 = distinct !DISubprogram(name: "x", linkageName: "_Z1xb", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 5, file: !1, scope: !5, type: !9, retainedNodes: !15)
148 !16 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11)
149 !17 = !DILocalVariable(name: "s", line: 7, scope: !18, file: !5, type: !20)
150 !18 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !19)
151 !19 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !14)
152 !20 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
153 !21 = !{i32 2, !"Dwarf Version", i32 4}
154 !22 = !{i32 2, !"Debug Info Version", i32 3}
155 !23 = !{!"clang version 3.5.0 "}
157 !25 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11)
158 !26 = !DILocation(line: 14, scope: !4)
159 !27 = !DILocation(line: 5, scope: !14, inlinedAt: !26)
160 !28 = !DILocation(line: 10, scope: !14, inlinedAt: !26)
161 !29 = !DILocation(line: 15, scope: !4)
162 !30 = !DILocation(line: 17, scope: !8)
163 !31 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11)
164 !32 = !DILocation(line: 18, scope: !8)
165 !33 = !DILocation(line: 5, scope: !14, inlinedAt: !32)
166 !34 = !DILocation(line: 6, scope: !19, inlinedAt: !32)
167 !35 = !DILocation(line: 7, scope: !18, inlinedAt: !32)
168 !36 = !{!37, !37, i64 0}
169 !37 = !{!"int", !38, i64 0}
170 !38 = !{!"omnipotent char", !39, i64 0}
171 !39 = !{!"Simple C/C++ TBAA"}
172 !40 = !DILocalVariable(name: "s", line: 7, scope: !18, file: !5, type: !20)
173 !41 = !DILocation(line: 8, scope: !18, inlinedAt: !32)
174 !42 = !DILocation(line: 9, scope: !18, inlinedAt: !32)
175 !43 = !DILocation(line: 10, scope: !14, inlinedAt: !32)
176 !44 = !DILocation(line: 19, scope: !8)