xref: /llvm-project/llvm/test/Transforms/LICM/sink-debuginfo-preserve.ll (revision 80e8f2beeb954f8c241897099bb01b24da400e8a) 
1; RUN: opt -S -passes=licm < %s | FileCheck %s
2
3; LICM is trying to merge the two `store` in block %14 and %17, but given their
4; locations disagree, it sets a line zero location instead instead of picking a
5; random one (the DILocation picked the nearest enclosing scope of the two stores).
6
7; Original C testcase.
8; volatile int a;
9; extern int g;
10; int g;
11; void f1() {
12;  while (a) {
13;    g = 0;
14;    if (a)
15;      g = 0;
16;  }
17; }
18
19; CHECK: bb22:
20; CHECK-NEXT: store i32 0, ptr getelementptr inbounds ([2 x i32], ptr @g_390, i64 0, i64 1), align 4, !dbg [[storeLocation:![0-9]+]]
21; CHECK: [[storeLocation]] = !DILocation(line: 0
22
23target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
24target triple = "x86_64-apple-macosx10.15.0"
25
26@b = global i32 0, align 4, !dbg !0
27@c = global i32 0, align 4, !dbg !10
28@g_390 = local_unnamed_addr global [2 x i32] zeroinitializer, align 4, !dbg !12
29@a = local_unnamed_addr global i32 0, align 4, !dbg !6
30
31define i32 @main() local_unnamed_addr !dbg !22 {
32bb:
33  %i = load volatile i32, ptr @b, align 4, !dbg !37, !tbaa !40
34  %i1 = icmp sgt i32 %i, -9, !dbg !44
35  br i1 %i1, label %bb2, label %bb4, !dbg !45
36
37bb2:                                              ; preds = %bb
38  br label %bb8, !dbg !45
39
40bb3:                                              ; preds = %bb8
41  br label %bb4, !dbg !45
42
43bb4:                                              ; preds = %bb3, %bb
44  %i5 = load volatile i32, ptr @c, align 4, !dbg !46, !tbaa !40
45  %i6 = icmp slt i32 %i5, 6, !dbg !47
46  br i1 %i6, label %bb7, label %bb23, !dbg !48
47
48bb7:                                              ; preds = %bb4
49  br label %bb13, !dbg !48
50
51bb8:                                              ; preds = %bb8, %bb2
52  %i9 = load volatile i32, ptr @b, align 4, !dbg !49, !tbaa !40
53  %i10 = add nsw i32 %i9, -1, !dbg !49
54  store volatile i32 %i10, ptr @b, align 4, !dbg !49, !tbaa !40
55  %i11 = load volatile i32, ptr @b, align 4, !dbg !37, !tbaa !40
56  %i12 = icmp sgt i32 %i11, -9, !dbg !44
57  br i1 %i12, label %bb8, label %bb3, !dbg !45, !llvm.loop !50
58
59bb13:                                             ; preds = %bb17, %bb7
60  store i32 0, ptr getelementptr inbounds ([2 x i32], ptr @g_390, i64 0, i64 1), align 4, !dbg !53, !tbaa !40
61  %i14 = load volatile i32, ptr @b, align 4, !dbg !54, !tbaa !40
62  %i15 = icmp eq i32 %i14, 0, !dbg !54
63  br i1 %i15, label %bb16, label %bb17, !dbg !55
64
65bb16:                                             ; preds = %bb13
66  store i32 0, ptr getelementptr inbounds ([2 x i32], ptr @g_390, i64 0, i64 1), align 4, !dbg !56, !tbaa !40
67  br label %bb17
68
69bb17:                                             ; preds = %bb16, %bb13
70  %i18 = load volatile i32, ptr @c, align 4, !dbg !57, !tbaa !40
71  %i20 = load volatile i32, ptr @c, align 4, !dbg !46, !tbaa !40
72  %i21 = icmp slt i32 %i20, 6, !dbg !47
73  br i1 %i21, label %bb13, label %bb22, !dbg !48, !llvm.loop !58
74
75bb22:                                             ; preds = %bb17
76  br label %bb23, !dbg !48
77
78bb23:                                             ; preds = %bb22, %bb4
79  ret i32 0, !dbg !60
80}
81
82!llvm.dbg.cu = !{!2}
83!llvm.module.flags = !{!17, !18, !19, !20}
84!llvm.ident = !{!21}
85
86!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
87!1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
88!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 11.0.0 (https://github.com/llvm/llvm-project d3588d0814c4cbc7fca677b4d9634f6e1428a331)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None, sysroot: "/")
89!3 = !DIFile(filename: "a.c", directory: "/Users/davide/work/build/bin")
90!4 = !{}
91!5 = !{!6, !0, !10, !12}
92!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
93!7 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
94!8 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !9)
95!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
96!10 = !DIGlobalVariableExpression(var: !11, expr: !DIExpression())
97!11 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
98!12 = !DIGlobalVariableExpression(var: !13, expr: !DIExpression())
99!13 = distinct !DIGlobalVariable(name: "g_390", scope: !2, file: !3, line: 2, type: !14, isLocal: false, isDefinition: true)
100!14 = !DICompositeType(tag: DW_TAG_array_type, baseType: !9, size: 64, elements: !15)
101!15 = !{!16}
102!16 = !DISubrange(count: 2)
103!17 = !{i32 7, !"Dwarf Version", i32 4}
104!18 = !{i32 2, !"Debug Info Version", i32 3}
105!19 = !{i32 1, !"wchar_size", i32 4}
106!20 = !{i32 7, !"PIC Level", i32 2}
107!21 = !{!"clang version 11.0.0 (https://github.com/llvm/llvm-project d3588d0814c4cbc7fca677b4d9634f6e1428a331)"}
108!22 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !23, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !25)
109!23 = !DISubroutineType(types: !24)
110!24 = !{!9}
111!25 = !{!26}
112!26 = !DILocalVariable(name: "l_1546", scope: !27, file: !3, line: 11, type: !32)
113!27 = distinct !DILexicalBlock(scope: !28, file: !3, line: 10, column: 10)
114!28 = distinct !DILexicalBlock(scope: !29, file: !3, line: 8, column: 9)
115!29 = distinct !DILexicalBlock(scope: !30, file: !3, line: 6, column: 23)
116!30 = distinct !DILexicalBlock(scope: !31, file: !3, line: 6, column: 3)
117!31 = distinct !DILexicalBlock(scope: !22, file: !3, line: 6, column: 3)
118!32 = !DICompositeType(tag: DW_TAG_array_type, baseType: !33, size: 288, elements: !34)
119!33 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
120!34 = !{!35, !36, !35}
121!35 = !DISubrange(count: 3)
122!36 = !DISubrange(count: 4)
123!37 = !DILocation(line: 4, column: 10, scope: !38)
124!38 = distinct !DILexicalBlock(scope: !39, file: !3, line: 4, column: 3)
125!39 = distinct !DILexicalBlock(scope: !22, file: !3, line: 4, column: 3)
126!40 = !{!41, !41, i64 0}
127!41 = !{!"int", !42, i64 0}
128!42 = !{!"omnipotent char", !43, i64 0}
129!43 = !{!"Simple C/C++ TBAA"}
130!44 = !DILocation(line: 4, column: 12, scope: !38)
131!45 = !DILocation(line: 4, column: 3, scope: !39)
132!46 = !DILocation(line: 6, column: 10, scope: !30)
133!47 = !DILocation(line: 6, column: 12, scope: !30)
134!48 = !DILocation(line: 6, column: 3, scope: !31)
135!49 = !DILocation(line: 4, column: 19, scope: !38)
136!50 = distinct !{!50, !45, !51, !52}
137!51 = !DILocation(line: 5, column: 5, scope: !39)
138!52 = !{!"llvm.loop.unroll.disable"}
139!53 = !DILocation(line: 7, column: 14, scope: !29)
140!54 = !DILocation(line: 8, column: 9, scope: !28)
141!55 = !DILocation(line: 8, column: 9, scope: !29)
142!56 = !DILocation(line: 12, column: 16, scope: !27)
143!57 = !DILocation(line: 6, column: 19, scope: !30)
144!58 = distinct !{!58, !48, !59, !52}
145!59 = !DILocation(line: 14, column: 3, scope: !31)
146!60 = !DILocation(line: 15, column: 1, scope: !22)
147