1 ; REQUIRES: object-emission
3 ; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -v -debug-info - | FileCheck %s
5 ; This isn't a very pretty test case - I imagine there might be other ways to
6 ; tickle the optimizers into producing the desired code, but I haven't found
9 ; The issue is when a function is inlined into itself, the inlined argument
10 ; accidentally overwrote the concrete argument and was lost.
12 ; IR generated from the following source compiled with clang -g:
14 ; void fn2(int, int, int, int);
21 ; if (b) fn2(0, 0, 0, 0);
26 ; inline void fn7() {}
32 ; void fn3() { fn6(); }
33 ; void fn4() { x->m_fn2(); }
34 ; void fn5() { x->m_fn2(); }
36 ; The definition of C and declaration of C::m_fn2
37 ; CHECK: DW_TAG_structure_type
38 ; CHECK-NOT: {{DW_TAG|NULL}}
39 ; CHECK: DW_TAG_member
40 ; CHECK-NOT: {{DW_TAG|NULL}}
41 ; CHECK: [[M_FN2_DECL:.*]]: DW_TAG_subprogram
43 ; CHECK: DW_AT_name {{.*}} "m_fn2"
44 ; CHECK-NOT: {{DW_TAG|NULL}}
45 ; CHECK: DW_TAG_formal_parameter
47 ; The abstract definition of C::m_fn2
48 ; CHECK: [[M_FN2_ABS_DEF:.*]]: DW_TAG_subprogram
50 ; CHECK: DW_AT_specification {{.*}} {[[M_FN2_DECL]]}
53 ; CHECK-NOT: {{DW_TAG|NULL}}
54 ; CHECK: [[M_FN2_THIS_ABS_DEF:.*]]: DW_TAG_formal_parameter
56 ; CHECK: DW_AT_name {{.*}} "this"
58 ; Skip some other functions
59 ; CHECK: DW_TAG_subprogram
60 ; CHECK: DW_TAG_subprogram
61 ; CHECK: DW_TAG_subprogram
63 ; The concrete definition of C::m_fn2
64 ; CHECK: DW_TAG_subprogram
66 ; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]}
67 ; CHECK-NOT: {{DW_TAG|NULL}}
68 ; CHECK: DW_TAG_formal_parameter
70 ; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]}
71 ; CHECK-NOT: {{DW_TAG|NULL}}
73 ; CHECK: DW_TAG_inlined_subroutine
74 ; CHECK-NOT: {{DW_TAG|NULL}}
76 ; CHECK: DW_TAG_inlined_subroutine
77 ; CHECK-NOT: {{DW_TAG|NULL}}
79 ; CHECK: DW_TAG_inlined_subroutine
81 ; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]}
82 ; CHECK-NOT: {{DW_TAG|NULL}}
83 ; CHECK: DW_TAG_formal_parameter
85 ; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]}
87 source_filename = "test/DebugInfo/Generic/recursive_inlining.ll"
89 %struct.C = type { i32 }
91 @x = global %struct.C* null, align 8, !dbg !0
93 ; Function Attrs: nounwind
94 define void @_Z3fn6v() #0 !dbg !20 {
96 tail call void @_Z3fn8v() #3, !dbg !23
97 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !24, !tbaa !25
98 tail call void @llvm.dbg.value(metadata %struct.C* %0, metadata !29, metadata !32) #3, !dbg !33
99 tail call void @_Z3fn8v() #3, !dbg !34
100 %b.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !35
101 %1 = load i32, i32* %b.i, align 4, !dbg !35, !tbaa !37
102 %tobool.i = icmp eq i32 %1, 0, !dbg !35
103 br i1 %tobool.i, label %_ZN1C5m_fn2Ev.exit, label %if.then.i, !dbg !35
105 if.then.i: ; preds = %entry
106 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !40
107 br label %_ZN1C5m_fn2Ev.exit, !dbg !40
109 _ZN1C5m_fn2Ev.exit: ; preds = %if.then.i, %entry
110 tail call void @_Z3fn3v() #3, !dbg !42
114 declare void @_Z3fn8v() #1
116 ; Function Attrs: nounwind
118 define linkonce_odr void @_ZN1C5m_fn2Ev(%struct.C* nocapture readonly %this) #0 align 2 !dbg !30 {
120 tail call void @llvm.dbg.value(metadata %struct.C* %this, metadata !29, metadata !32), !dbg !44
121 tail call void @_Z3fn8v() #3, !dbg !45
122 %b = getelementptr inbounds %struct.C, %struct.C* %this, i64 0, i32 0, !dbg !46
123 %0 = load i32, i32* %b, align 4, !dbg !46, !tbaa !37
124 %tobool = icmp eq i32 %0, 0, !dbg !46
125 br i1 %tobool, label %if.end, label %if.then, !dbg !46
127 if.then: ; preds = %entry
128 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !47
129 br label %if.end, !dbg !47
131 if.end: ; preds = %if.then, %entry
132 tail call void @_Z3fn8v() #3, !dbg !48
133 %1 = load %struct.C*, %struct.C** @x, align 8, !dbg !52, !tbaa !25
134 tail call void @llvm.dbg.value(metadata %struct.C* %1, metadata !29, metadata !32) #3, !dbg !53
135 tail call void @_Z3fn8v() #3, !dbg !54
136 %b.i.i = getelementptr inbounds %struct.C, %struct.C* %1, i64 0, i32 0, !dbg !55
137 %2 = load i32, i32* %b.i.i, align 4, !dbg !55, !tbaa !37
138 %tobool.i.i = icmp eq i32 %2, 0, !dbg !55
139 br i1 %tobool.i.i, label %_Z3fn6v.exit, label %if.then.i.i, !dbg !55
141 if.then.i.i: ; preds = %if.end
143 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !56
144 br label %_Z3fn6v.exit, !dbg !56
146 _Z3fn6v.exit: ; preds = %if.then.i.i, %if.end
147 tail call void @_Z3fn3v() #3, !dbg !57
151 ; Function Attrs: nounwind
152 define void @_Z3fn3v() #0 !dbg !50 {
154 br label %tailrecurse
156 tailrecurse: ; preds = %tailrecurse.backedge, %entry
157 tail call void @_Z3fn8v() #3, !dbg !59
158 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !61, !tbaa !25
159 tail call void @llvm.dbg.value(metadata %struct.C* %0, metadata !29, metadata !32) #3, !dbg !62
160 tail call void @_Z3fn8v() #3, !dbg !63
161 %b.i.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !64
162 %1 = load i32, i32* %b.i.i, align 4, !dbg !64, !tbaa !37
163 %tobool.i.i = icmp eq i32 %1, 0, !dbg !64
164 br i1 %tobool.i.i, label %tailrecurse.backedge, label %if.then.i.i, !dbg !64
166 tailrecurse.backedge: ; preds = %if.then.i.i, %tailrecurse
167 br label %tailrecurse
169 if.then.i.i: ; preds = %tailrecurse
170 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !65
171 br label %tailrecurse.backedge, !dbg !65
174 ; Function Attrs: nounwind
175 define void @_Z3fn4v() #0 !dbg !66 {
177 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !67, !tbaa !25
178 tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !67
182 ; Function Attrs: nounwind
183 define void @_Z3fn5v() #0 !dbg !68 {
185 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !69, !tbaa !25
186 tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !69
190 declare void @_Z3fn2iiii(i32, i32, i32, i32) #1
192 ; Function Attrs: nounwind readnone
193 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
195 attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
196 attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
197 attributes #2 = { nounwind readnone }
198 attributes #3 = { nounwind }
200 !llvm.dbg.cu = !{!12}
201 !llvm.module.flags = !{!17, !18}
204 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
205 !1 = !DIGlobalVariable(name: "x", scope: null, file: !2, line: 13, type: !3, isLocal: false, isDefinition: true)
206 !2 = !DIFile(filename: "recursive_inlining.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce")
207 !3 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64)
208 !4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", file: !2, line: 5, size: 32, align: 32, elements: !5, identifier: "_ZTS1C")
210 !6 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !4, file: !2, line: 6, baseType: !7, size: 32, align: 32)
211 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
212 !8 = !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", scope: !4, file: !2, line: 7, type: !9, isLocal: false, isDefinition: false, scopeLine: 7, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true)
213 !9 = !DISubroutineType(types: !10)
215 !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
216 !12 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !13, producer: "clang version 3.6.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !14, retainedTypes: !15, globals: !16, imports: !14)
217 !13 = !DIFile(filename: "<stdin>", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce")
221 !17 = !{i32 2, !"Dwarf Version", i32 4}
222 !18 = !{i32 2, !"Debug Info Version", i32 3}
223 !19 = !{!"clang version 3.6.0 "}
224 !20 = distinct !DISubprogram(name: "fn6", linkageName: "_Z3fn6v", scope: !2, file: !2, line: 15, type: !21, isLocal: false, isDefinition: true, scopeLine: 15, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14)
225 !21 = !DISubroutineType(types: !22)
227 !23 = !DILocation(line: 16, scope: !20)
228 !24 = !DILocation(line: 17, scope: !20)
229 !25 = !{!26, !26, i64 0}
230 !26 = !{!"any pointer", !27, i64 0}
231 !27 = !{!"omnipotent char", !28, i64 0}
232 !28 = !{!"Simple C/C++ TBAA"}
233 !29 = !DILocalVariable(name: "this", arg: 1, scope: !30, type: !3, flags: DIFlagArtificial | DIFlagObjectPointer)
234 !30 = distinct !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", scope: !4, file: !2, line: 7, type: !9, isLocal: false, isDefinition: true, scopeLine: 7, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, declaration: !8, retainedNodes: !31)
236 !32 = !DIExpression()
237 !33 = !DILocation(line: 0, scope: !30, inlinedAt: !24)
238 !34 = !DILocation(line: 8, scope: !30, inlinedAt: !24)
239 !35 = !DILocation(line: 9, scope: !36, inlinedAt: !24)
240 !36 = distinct !DILexicalBlock(scope: !30, file: !2, line: 9)
241 !37 = !{!38, !39, i64 0}
242 !38 = !{!"struct", !39, i64 0}
243 !39 = !{!"int", !27, i64 0}
244 !40 = !DILocation(line: 9, scope: !41, inlinedAt: !24)
245 !41 = distinct !DILexicalBlock(scope: !36, file: !2, line: 9)
246 !42 = !DILocation(line: 10, scope: !30, inlinedAt: !24)
247 !43 = !DILocation(line: 19, scope: !20)
248 !44 = !DILocation(line: 0, scope: !30)
249 !45 = !DILocation(line: 8, scope: !30)
250 !46 = !DILocation(line: 9, scope: !36)
251 !47 = !DILocation(line: 9, scope: !41)
252 !48 = !DILocation(line: 16, scope: !20, inlinedAt: !49)
253 !49 = !DILocation(line: 20, scope: !50, inlinedAt: !51)
254 !50 = distinct !DISubprogram(name: "fn3", linkageName: "_Z3fn3v", scope: !2, file: !2, line: 20, type: !21, isLocal: false, isDefinition: true, scopeLine: 20, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14)
255 !51 = !DILocation(line: 10, scope: !30)
256 !52 = !DILocation(line: 17, scope: !20, inlinedAt: !49)
257 !53 = !DILocation(line: 0, scope: !30, inlinedAt: !52)
258 !54 = !DILocation(line: 8, scope: !30, inlinedAt: !52)
259 !55 = !DILocation(line: 9, scope: !36, inlinedAt: !52)
260 !56 = !DILocation(line: 9, scope: !41, inlinedAt: !52)
261 !57 = !DILocation(line: 10, scope: !30, inlinedAt: !52)
262 !58 = !DILocation(line: 11, scope: !30)
263 !59 = !DILocation(line: 16, scope: !20, inlinedAt: !60)
264 !60 = !DILocation(line: 20, scope: !50)
265 !61 = !DILocation(line: 17, scope: !20, inlinedAt: !60)
266 !62 = !DILocation(line: 0, scope: !30, inlinedAt: !61)
267 !63 = !DILocation(line: 8, scope: !30, inlinedAt: !61)
268 !64 = !DILocation(line: 9, scope: !36, inlinedAt: !61)
269 !65 = !DILocation(line: 9, scope: !41, inlinedAt: !61)
270 !66 = distinct !DISubprogram(name: "fn4", linkageName: "_Z3fn4v", scope: !2, file: !2, line: 21, type: !21, isLocal: false, isDefinition: true, scopeLine: 21, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14)
271 !67 = !DILocation(line: 21, scope: !66)
272 !68 = distinct !DISubprogram(name: "fn5", linkageName: "_Z3fn5v", scope: !2, file: !2, line: 22, type: !21, isLocal: false, isDefinition: true, scopeLine: 22, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14)
273 !69 = !DILocation(line: 22, scope: !68)