1 ; RUN: opt %s -simplifycfg -verify -S -o - | FileCheck %s
3 ; Verify that SimplifyCFG does not invalidate operands for
4 ; llvm.dbg.value intrinsics.
6 ; Reduced from the following example, compiled with
7 ; -O1 -g -fno-exceptions -fno-discard-value-names:
13 ; [&a, &b, &c] { b = true; }();
16 ; __builtin_debugtrap();
21 ; CHECK-NOT: llvm.dbg.value(metadata !
24 %class.anon = type { i8*, i8*, i8* }
26 ; Function Attrs: nounwind uwtable
27 define dso_local void @_Z4testv() local_unnamed_addr !dbg !7 {
29 %a = alloca i8, align 1
30 %b = alloca i8, align 1
31 %c = alloca i8, align 1
32 %ref.tmp = alloca %class.anon, align 8
33 call void @llvm.dbg.value(metadata i8* %a, metadata !12, metadata !DIExpression(DW_OP_deref)), !dbg !16
34 call void @llvm.dbg.value(metadata i8 0, metadata !12, metadata !DIExpression()), !dbg !16
35 store i8 0, i8* %a, align 1, !dbg !16
36 call void @llvm.dbg.value(metadata i8* %b, metadata !14, metadata !DIExpression(DW_OP_deref)), !dbg !16
37 call void @llvm.dbg.value(metadata i8 0, metadata !14, metadata !DIExpression()), !dbg !16
38 store i8 0, i8* %b, align 1, !dbg !16
39 call void @llvm.dbg.value(metadata i8* %c, metadata !15, metadata !DIExpression(DW_OP_deref)), !dbg !16
40 call void @llvm.dbg.value(metadata i8 0, metadata !15, metadata !DIExpression()), !dbg !16
41 store i8 0, i8* %c, align 1, !dbg !16
42 %0 = bitcast %class.anon* %ref.tmp to i8*, !dbg !16
43 %1 = getelementptr inbounds %class.anon, %class.anon* %ref.tmp, i64 0, i32 0, !dbg !16
44 store i8* %a, i8** %1, align 8, !dbg !16
45 %2 = getelementptr inbounds %class.anon, %class.anon* %ref.tmp, i64 0, i32 1, !dbg !16
46 store i8* %b, i8** %2, align 8, !dbg !16
47 %3 = getelementptr inbounds %class.anon, %class.anon* %ref.tmp, i64 0, i32 2, !dbg !16
48 store i8* %c, i8** %3, align 8, !dbg !16
49 call fastcc void @"_ZZ4testvENK3$_0clEv"(%class.anon* nonnull %ref.tmp), !dbg !16
50 %4 = load i8, i8* %a, align 1, !dbg !17
51 call void @llvm.dbg.value(metadata i8 %4, metadata !12, metadata !DIExpression()), !dbg !16
52 %tobool = icmp eq i8 %4, 0, !dbg !17
53 br i1 %tobool, label %lor.lhs.false, label %if.then, !dbg !17
55 lor.lhs.false: ; preds = %entry
56 %5 = load i8, i8* %b, align 1, !dbg !17
57 call void @llvm.dbg.value(metadata i8 %5, metadata !14, metadata !DIExpression()), !dbg !16
58 %tobool1 = icmp eq i8 %5, 0, !dbg !17
59 br i1 %tobool1, label %lor.lhs.false2, label %if.then, !dbg !17
61 lor.lhs.false2: ; preds = %lor.lhs.false
62 %6 = load i8, i8* %c, align 1, !dbg !17
63 call void @llvm.dbg.value(metadata i8 %6, metadata !15, metadata !DIExpression()), !dbg !16
64 %tobool3 = icmp eq i8 %6, 0, !dbg !17
65 br i1 %tobool3, label %if.end, label %if.then, !dbg !16
67 if.then: ; preds = %lor.lhs.false2, %lor.lhs.false, %entry
68 call void @llvm.debugtrap(), !dbg !19
69 br label %if.end, !dbg !19
71 if.end: ; preds = %lor.lhs.false2, %if.then
72 call void @llvm.dbg.value(metadata i8* %c, metadata !15, metadata !DIExpression(DW_OP_deref)), !dbg !16
73 call void @llvm.dbg.value(metadata i8* %b, metadata !14, metadata !DIExpression(DW_OP_deref)), !dbg !16
74 call void @llvm.dbg.value(metadata i8* %a, metadata !12, metadata !DIExpression(DW_OP_deref)), !dbg !16
78 ; Function Attrs: inlinehint nounwind uwtable
79 define internal fastcc void @"_ZZ4testvENK3$_0clEv"(%class.anon* %this) unnamed_addr align 2 !dbg !21 {
81 call void @llvm.dbg.value(metadata %class.anon* %this, metadata !34, metadata !DIExpression()), !dbg !36
82 %0 = getelementptr inbounds %class.anon, %class.anon* %this, i32 0, i32 1, !dbg !36
83 %1 = load i8*, i8** %0, align 8, !dbg !36
84 store i8 1, i8* %1, align 1, !dbg !36
88 ; Function Attrs: nounwind
89 declare void @llvm.debugtrap()
91 ; Function Attrs: nounwind readnone speculatable
92 declare void @llvm.dbg.value(metadata, metadata, metadata)
95 !llvm.module.flags = !{!3, !4, !5}
98 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.1-4 (tags/RELEASE_801/final)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
99 !1 = !DIFile(filename: "test.cc", directory: "/dir")
101 !3 = !{i32 2, !"Dwarf Version", i32 4}
102 !4 = !{i32 2, !"Debug Info Version", i32 3}
103 !5 = !{i32 1, !"wchar_size", i32 4}
104 !6 = !{!"clang version 8.0.1-4 (tags/RELEASE_801/final)"}
105 !7 = distinct !DISubprogram(name: "test", linkageName: "_Z4testv", scope: !8, file: !8, line: 1, type: !9, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
106 !8 = !DIFile(filename: "test.cc", directory: "/dir")
107 !9 = !DISubroutineType(types: !10)
109 !11 = !{!12, !14, !15}
110 !12 = !DILocalVariable(name: "a", scope: !7, file: !8, line: 2, type: !13)
111 !13 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)
112 !14 = !DILocalVariable(name: "b", scope: !7, file: !8, line: 3, type: !13)
113 !15 = !DILocalVariable(name: "c", scope: !7, file: !8, line: 4, type: !13)
114 !16 = !DILocation(line: 2, scope: !7)
115 !17 = !DILocation(line: 7, scope: !18)
116 !18 = distinct !DILexicalBlock(scope: !7, file: !8, line: 7)
117 !19 = !DILocation(line: 8, scope: !20)
118 !20 = distinct !DILexicalBlock(scope: !18, file: !8, line: 7)
119 !21 = distinct !DISubprogram(name: "operator()", linkageName: "_ZZ4testvENK3$_0clEv", scope: !22, file: !8, line: 5, type: !28, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, declaration: !32, retainedNodes: !33)
120 !22 = distinct !DICompositeType(tag: DW_TAG_class_type, scope: !7, file: !8, line: 5, size: 192, flags: DIFlagTypePassByValue, elements: !23)
121 !23 = !{!24, !26, !27}
122 !24 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !22, file: !8, line: 5, baseType: !25, size: 64)
123 !25 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !13, size: 64)
124 !26 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !22, file: !8, line: 5, baseType: !25, size: 64, offset: 64)
125 !27 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !22, file: !8, line: 5, baseType: !25, size: 64, offset: 128)
126 !28 = !DISubroutineType(types: !29)
128 !30 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !31, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
129 !31 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !22)
130 !32 = !DISubprogram(name: "operator()", scope: !22, file: !8, line: 5, type: !28, scopeLine: 5, flags: DIFlagPublic | DIFlagPrototyped, spFlags: DISPFlagOptimized)
132 !34 = !DILocalVariable(name: "this", arg: 1, scope: !21, type: !35, flags: DIFlagArtificial | DIFlagObjectPointer)
133 !35 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !31, size: 64)
134 !36 = !DILocation(line: 0, scope: !21)