1 ; RUN: opt %s -passes=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 { ptr, ptr, ptr }
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 ptr %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, ptr %a, align 1, !dbg !16
36 call void @llvm.dbg.value(metadata ptr %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, ptr %b, align 1, !dbg !16
39 call void @llvm.dbg.value(metadata ptr %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, ptr %c, align 1, !dbg !16
42 store ptr %a, ptr %ref.tmp, align 8, !dbg !16
43 %0 = getelementptr inbounds %class.anon, ptr %ref.tmp, i64 0, i32 1, !dbg !16
44 store ptr %b, ptr %0, align 8, !dbg !16
45 %1 = getelementptr inbounds %class.anon, ptr %ref.tmp, i64 0, i32 2, !dbg !16
46 store ptr %c, ptr %1, align 8, !dbg !16
47 call fastcc void @"_ZZ4testvENK3$_0clEv"(ptr nonnull %ref.tmp), !dbg !16
48 %2 = load i8, ptr %a, align 1, !dbg !17
49 call void @llvm.dbg.value(metadata i8 %2, metadata !12, metadata !DIExpression()), !dbg !16
50 %tobool = icmp eq i8 %2, 0, !dbg !17
51 br i1 %tobool, label %lor.lhs.false, label %if.then, !dbg !17
53 lor.lhs.false: ; preds = %entry
54 %3 = load i8, ptr %b, align 1, !dbg !17
55 call void @llvm.dbg.value(metadata i8 %3, metadata !14, metadata !DIExpression()), !dbg !16
56 %tobool1 = icmp eq i8 %3, 0, !dbg !17
57 br i1 %tobool1, label %lor.lhs.false2, label %if.then, !dbg !17
59 lor.lhs.false2: ; preds = %lor.lhs.false
60 %4 = load i8, ptr %c, align 1, !dbg !17
61 call void @llvm.dbg.value(metadata i8 %4, metadata !15, metadata !DIExpression()), !dbg !16
62 %tobool3 = icmp eq i8 %4, 0, !dbg !17
63 br i1 %tobool3, label %if.end, label %if.then, !dbg !16
65 if.then: ; preds = %lor.lhs.false2, %lor.lhs.false, %entry
66 call void @llvm.debugtrap(), !dbg !19
67 br label %if.end, !dbg !19
69 if.end: ; preds = %lor.lhs.false2, %if.then
70 call void @llvm.dbg.value(metadata ptr %c, metadata !15, metadata !DIExpression(DW_OP_deref)), !dbg !16
71 call void @llvm.dbg.value(metadata ptr %b, metadata !14, metadata !DIExpression(DW_OP_deref)), !dbg !16
72 call void @llvm.dbg.value(metadata ptr %a, metadata !12, metadata !DIExpression(DW_OP_deref)), !dbg !16
76 ; Function Attrs: inlinehint nounwind uwtable
77 define internal fastcc void @"_ZZ4testvENK3$_0clEv"(ptr %this) unnamed_addr align 2 !dbg !21 {
79 call void @llvm.dbg.value(metadata ptr %this, metadata !34, metadata !DIExpression()), !dbg !36
80 %0 = getelementptr inbounds %class.anon, ptr %this, i32 0, i32 1, !dbg !36
81 %1 = load ptr, ptr %0, align 8, !dbg !36
82 store i8 1, ptr %1, align 1, !dbg !36
86 ; Function Attrs: nounwind
87 declare void @llvm.debugtrap()
89 ; Function Attrs: nounwind readnone speculatable
90 declare void @llvm.dbg.value(metadata, metadata, metadata)
93 !llvm.module.flags = !{!3, !4, !5}
96 !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)
97 !1 = !DIFile(filename: "test.cc", directory: "/dir")
99 !3 = !{i32 2, !"Dwarf Version", i32 4}
100 !4 = !{i32 2, !"Debug Info Version", i32 3}
101 !5 = !{i32 1, !"wchar_size", i32 4}
102 !6 = !{!"clang version 8.0.1-4 (tags/RELEASE_801/final)"}
103 !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)
104 !8 = !DIFile(filename: "test.cc", directory: "/dir")
105 !9 = !DISubroutineType(types: !10)
107 !11 = !{!12, !14, !15}
108 !12 = !DILocalVariable(name: "a", scope: !7, file: !8, line: 2, type: !13)
109 !13 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)
110 !14 = !DILocalVariable(name: "b", scope: !7, file: !8, line: 3, type: !13)
111 !15 = !DILocalVariable(name: "c", scope: !7, file: !8, line: 4, type: !13)
112 !16 = !DILocation(line: 2, scope: !7)
113 !17 = !DILocation(line: 7, scope: !18)
114 !18 = distinct !DILexicalBlock(scope: !7, file: !8, line: 7)
115 !19 = !DILocation(line: 8, scope: !20)
116 !20 = distinct !DILexicalBlock(scope: !18, file: !8, line: 7)
117 !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)
118 !22 = distinct !DICompositeType(tag: DW_TAG_class_type, scope: !7, file: !8, line: 5, size: 192, flags: DIFlagTypePassByValue, elements: !23)
119 !23 = !{!24, !26, !27}
120 !24 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !22, file: !8, line: 5, baseType: !25, size: 64)
121 !25 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !13, size: 64)
122 !26 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !22, file: !8, line: 5, baseType: !25, size: 64, offset: 64)
123 !27 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !22, file: !8, line: 5, baseType: !25, size: 64, offset: 128)
124 !28 = !DISubroutineType(types: !29)
126 !30 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !31, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
127 !31 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !22)
128 !32 = !DISubprogram(name: "operator()", scope: !22, file: !8, line: 5, type: !28, scopeLine: 5, flags: DIFlagPublic | DIFlagPrototyped, spFlags: DISPFlagOptimized)
130 !34 = !DILocalVariable(name: "this", arg: 1, scope: !21, type: !35, flags: DIFlagArtificial | DIFlagObjectPointer)
131 !35 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !31, size: 64)
132 !36 = !DILocation(line: 0, scope: !21)