1 ; RUN: opt -instcombine < %s -S | FileCheck %s
3 ; This tests dbg.declare lowering for CallInst users of an alloca. The
4 ; resulting dbg.value expressions should add a deref to the declare's expression.
6 ; Hand-reduced from this example (-g -Og -fsanitize=address):
8 ; static volatile int sink;
9 ; struct OneElementVector {
11 ; OneElementVector(int Element) : Element(Element) { sink = Element; }
12 ; bool empty() const { return false; }
14 ; using container = OneElementVector;
15 ; static void escape(container &c) { sink = c.Element; }
17 ; container d1 = {42};
23 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
24 target triple = "x86_64-apple-macosx10.13.0"
26 %struct.OneElementVector = type { i32 }
28 define i1 @escape(%struct.OneElementVector* %d1) {
33 define i32 @main() !dbg !15 {
35 %d1 = alloca %struct.OneElementVector, align 4
36 %0 = bitcast %struct.OneElementVector* %d1 to i8*, !dbg !34
38 ; CHECK: dbg.value(metadata %struct.OneElementVector* [[var:%.*]], metadata !DIExpression(DW_OP_deref))
39 ; CHECK-NEXT: call i1 @escape
40 call void @llvm.dbg.declare(metadata %struct.OneElementVector* %d1, metadata !19, metadata !DIExpression()), !dbg !35
41 call i1 @escape(%struct.OneElementVector* %d1)
42 br label %while.cond, !dbg !37
44 while.cond: ; preds = %while.body, %entry
45 ; CHECK: dbg.value(metadata %struct.OneElementVector* [[var]], metadata !DIExpression(DW_OP_deref))
46 ; CHECK-NEXT: call i1 @escape
47 %call = call i1 @escape(%struct.OneElementVector* %d1), !dbg !38
48 %lnot = xor i1 %call, true, !dbg !39
49 br i1 %lnot, label %while.body, label %while.end, !dbg !37
51 while.body: ; preds = %while.cond
52 ; CHECK: dbg.value(metadata %struct.OneElementVector* [[var]], metadata !DIExpression(DW_OP_deref))
53 ; CHECK-NEXT: call i1 @escape
54 call i1 @escape(%struct.OneElementVector* %d1)
55 br label %while.cond, !dbg !37, !llvm.loop !42
57 while.end: ; preds = %while.cond
64 %d1 = alloca %struct.OneElementVector, align 4
65 %0 = bitcast %struct.OneElementVector* %d1 to i8*, !dbg !34
67 ; CHECK: dbg.value(metadata %struct.OneElementVector* [[var:%.*]], metadata !DIExpression(DW_OP_lit0, DW_OP_mul, DW_OP_deref))
68 ; CHECK-NEXT: call i1 @escape
69 call void @llvm.dbg.declare(metadata %struct.OneElementVector* %d1, metadata !19, metadata !DIExpression(DW_OP_lit0, DW_OP_mul)), !dbg !35
70 call i1 @escape(%struct.OneElementVector* %d1)
71 br label %while.cond, !dbg !37
73 while.cond: ; preds = %while.body, %entry
74 ; CHECK: dbg.value(metadata %struct.OneElementVector* [[var]], metadata !DIExpression(DW_OP_lit0, DW_OP_mul, DW_OP_deref))
75 ; CHECK-NEXT: call i1 @escape
76 %call = call i1 @escape(%struct.OneElementVector* %d1), !dbg !38
77 %lnot = xor i1 %call, true, !dbg !39
78 br i1 %lnot, label %while.body, label %while.end, !dbg !37
80 while.body: ; preds = %while.cond
81 ; CHECK: dbg.value(metadata %struct.OneElementVector* [[var]], metadata !DIExpression(DW_OP_lit0, DW_OP_mul, DW_OP_deref))
82 ; CHECK-NEXT: call i1 @escape
83 call i1 @escape(%struct.OneElementVector* %d1)
84 br label %while.cond, !dbg !37, !llvm.loop !42
86 while.end: ; preds = %while.cond
90 declare void @llvm.dbg.declare(metadata, metadata, metadata)
93 !llvm.asan.globals = !{!8}
94 !llvm.module.flags = !{!10, !11, !12, !13}
97 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
98 !1 = distinct !DIGlobalVariable(name: "sink", linkageName: "_ZL4sink", scope: !2, file: !3, line: 1, type: !6, isLocal: true, isDefinition: true)
99 !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 7.0.0 (trunk 337207) (llvm/trunk 337204)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
100 !3 = !DIFile(filename: "test.cc", directory: "/Users/vsk/src/builds/llvm.org-master-RA")
103 !6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7)
104 !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
106 !9 = !{!"test.cc", i32 1, i32 21}
107 !10 = !{i32 2, !"Dwarf Version", i32 4}
108 !11 = !{i32 2, !"Debug Info Version", i32 3}
109 !12 = !{i32 1, !"wchar_size", i32 4}
110 !13 = !{i32 7, !"PIC Level", i32 2}
111 !14 = !{!"clang version 7.0.0 (trunk 337207) (llvm/trunk 337204)"}
112 !15 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 18, type: !16, isLocal: false, isDefinition: true, scopeLine: 18, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !18)
113 !16 = !DISubroutineType(types: !17)
116 !19 = !DILocalVariable(name: "d1", scope: !15, file: !3, line: 21, type: !20)
117 !20 = !DIDerivedType(tag: DW_TAG_typedef, name: "container", file: !3, line: 12, baseType: !21)
118 !21 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "OneElementVector", file: !3, line: 3, size: 32, flags: DIFlagTypePassByValue, elements: !22, identifier: "_ZTS16OneElementVector")
119 !22 = !{!23, !24, !28}
120 !23 = !DIDerivedType(tag: DW_TAG_member, name: "Element", scope: !21, file: !3, line: 4, baseType: !7, size: 32)
121 !24 = !DISubprogram(name: "OneElementVector", scope: !21, file: !3, line: 6, type: !25, isLocal: false, isDefinition: false, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true)
122 !25 = !DISubroutineType(types: !26)
123 !26 = !{null, !27, !7}
124 !27 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !21, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
125 !28 = !DISubprogram(name: "empty", linkageName: "_ZNK16OneElementVector5emptyEv", scope: !21, file: !3, line: 8, type: !29, isLocal: false, isDefinition: false, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true)
126 !29 = !DISubroutineType(types: !30)
128 !31 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)
129 !32 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !33, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
130 !33 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !21)
131 !34 = !DILocation(line: 21, column: 3, scope: !15)
132 !35 = !DILocation(line: 21, column: 13, scope: !15)
133 !36 = !DILocation(line: 21, column: 18, scope: !15)
134 !37 = !DILocation(line: 22, column: 3, scope: !15)
135 !38 = !DILocation(line: 22, column: 14, scope: !15)
136 !39 = !DILocation(line: 22, column: 10, scope: !15)
137 !40 = !DILocation(line: 23, column: 5, scope: !41)
138 !41 = distinct !DILexicalBlock(scope: !15, file: !3, line: 22, column: 23)
139 !42 = distinct !{!42, !37, !43}
140 !43 = !DILocation(line: 24, column: 3, scope: !15)
141 !44 = !DILocation(line: 26, column: 1, scope: !15)
142 !45 = !DILocation(line: 25, column: 3, scope: !15)
143 !46 = distinct !DISubprogram(name: "OneElementVector", linkageName: "_ZN16OneElementVectorC1Ei", scope: !21, file: !3, line: 6, type: !25, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, declaration: !24, retainedNodes: !47)
145 !48 = !DILocalVariable(name: "this", arg: 1, scope: !46, type: !49, flags: DIFlagArtificial | DIFlagObjectPointer)
146 !49 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !21, size: 64)
147 !50 = !DILocalVariable(name: "Element", arg: 2, scope: !46, file: !3, line: 6, type: !7)
148 !51 = !DILocation(line: 0, scope: !46)
149 !52 = !DILocation(line: 6, column: 24, scope: !46)
150 !53 = !DILocation(line: 6, column: 52, scope: !46)
151 !54 = !DILocation(line: 6, column: 70, scope: !46)
152 !55 = distinct !DISubprogram(name: "empty", linkageName: "_ZNK16OneElementVector5emptyEv", scope: !21, file: !3, line: 8, type: !29, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true, unit: !2, declaration: !28, retainedNodes: !56)
154 !57 = !DILocalVariable(name: "this", arg: 1, scope: !55, type: !58, flags: DIFlagArtificial | DIFlagObjectPointer)
155 !58 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !33, size: 64)
156 !59 = !DILocation(line: 0, scope: !55)
157 !60 = !DILocation(line: 8, column: 24, scope: !55)
158 !61 = distinct !DISubprogram(name: "escape", linkageName: "_ZL6escapeR16OneElementVector", scope: !3, file: !3, line: 14, type: !62, isLocal: true, isDefinition: true, scopeLine: 14, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !65)
159 !62 = !DISubroutineType(types: !63)
161 !64 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !20, size: 64)
163 !66 = !DILocalVariable(name: "c", arg: 1, scope: !61, file: !3, line: 14, type: !64)
164 !67 = !DILocation(line: 14, column: 31, scope: !61)
165 !68 = !DILocation(line: 15, column: 12, scope: !61)
166 !69 = !{!70, !71, i64 0}
167 !70 = !{!"_ZTS16OneElementVector", !71, i64 0}
168 !71 = !{!"int", !72, i64 0}
169 !72 = !{!"omnipotent char", !73, i64 0}
170 !73 = !{!"Simple C++ TBAA"}
171 !74 = !DILocation(line: 15, column: 8, scope: !61)
172 !75 = !{!71, !71, i64 0}
173 !76 = !DILocation(line: 16, column: 1, scope: !61)
174 !77 = distinct !DISubprogram(name: "OneElementVector", linkageName: "_ZN16OneElementVectorC2Ei", scope: !21, file: !3, line: 6, type: !25, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, declaration: !24, retainedNodes: !78)
176 !79 = !DILocalVariable(name: "this", arg: 1, scope: !77, type: !49, flags: DIFlagArtificial | DIFlagObjectPointer)
177 !80 = !DILocalVariable(name: "Element", arg: 2, scope: !77, file: !3, line: 6, type: !7)
178 !81 = !DILocation(line: 0, scope: !77)
179 !82 = !DILocation(line: 6, column: 24, scope: !77)
180 !83 = !DILocation(line: 6, column: 35, scope: !77)
181 !84 = !DILocation(line: 6, column: 59, scope: !85)
182 !85 = distinct !DILexicalBlock(scope: !77, file: !3, line: 6, column: 52)
183 !86 = !DILocation(line: 6, column: 70, scope: !77)