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1; RUN: opt -S -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: %.lcssa = phi i32
20; CHECK-NEXT: store i32 %.lcssa, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @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 {
32  %1 = load volatile i32, i32* @b, align 4, !dbg !37, !tbaa !40
33  %2 = icmp sgt i32 %1, -9, !dbg !44
34  br i1 %2, label %3, label %5, !dbg !45
35
363:                                                ; preds = %0
37  br label %9, !dbg !45
38
394:                                                ; preds = %9
40  br label %5, !dbg !45
41
425:                                                ; preds = %4, %0
43  %6 = load volatile i32, i32* @c, align 4, !dbg !46, !tbaa !40
44  %7 = icmp slt i32 %6, 6, !dbg !47
45  br i1 %7, label %8, label %24, !dbg !48
46
478:                                                ; preds = %5
48  br label %14, !dbg !48
49
509:                                                ; preds = %3, %9
51  %10 = load volatile i32, i32* @b, align 4, !dbg !49, !tbaa !40
52  %11 = add nsw i32 %10, -1, !dbg !49
53  store volatile i32 %11, i32* @b, align 4, !dbg !49, !tbaa !40
54  %12 = load volatile i32, i32* @b, align 4, !dbg !37, !tbaa !40
55  %13 = icmp sgt i32 %12, -9, !dbg !44
56  br i1 %13, label %9, label %4, !dbg !45, !llvm.loop !50
57
5814:                                               ; preds = %8, %18
59  store i32 0, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @g_390, i64 0, i64 1), align 4, !dbg !53, !tbaa !40
60  %15 = load volatile i32, i32* @b, align 4, !dbg !54, !tbaa !40
61  %16 = icmp eq i32 %15, 0, !dbg !54
62  br i1 %16, label %17, label %18, !dbg !55
63
6417:                                               ; preds = %14
65  store i32 0, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @g_390, i64 0, i64 1), align 4, !dbg !56, !tbaa !40
66  br label %18
67
6818:                                               ; preds = %14, %17
69  %19 = load volatile i32, i32* @c, align 4, !dbg !57, !tbaa !40
70  %20 = add nsw i32 %19, 1, !dbg !57
71  store volatile i32 %20, i32* @c, align 4, !dbg !57, !tbaa !40
72  %21 = load volatile i32, i32* @c, align 4, !dbg !46, !tbaa !40
73  %22 = icmp slt i32 %21, 6, !dbg !47
74  br i1 %22, label %14, label %23, !dbg !48, !llvm.loop !58
75
7623:                                               ; preds = %18
77  br label %24, !dbg !48
78
7924:                                               ; preds = %23, %5
80  ret i32 0, !dbg !60
81}
82
83!llvm.dbg.cu = !{!2}
84!llvm.module.flags = !{!17, !18, !19, !20}
85!llvm.ident = !{!21}
86
87!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
88!1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
89!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: "/")
90!3 = !DIFile(filename: "a.c", directory: "/Users/davide/work/build/bin")
91!4 = !{}
92!5 = !{!6, !0, !10, !12}
93!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
94!7 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
95!8 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !9)
96!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
97!10 = !DIGlobalVariableExpression(var: !11, expr: !DIExpression())
98!11 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
99!12 = !DIGlobalVariableExpression(var: !13, expr: !DIExpression())
100!13 = distinct !DIGlobalVariable(name: "g_390", scope: !2, file: !3, line: 2, type: !14, isLocal: false, isDefinition: true)
101!14 = !DICompositeType(tag: DW_TAG_array_type, baseType: !9, size: 64, elements: !15)
102!15 = !{!16}
103!16 = !DISubrange(count: 2)
104!17 = !{i32 7, !"Dwarf Version", i32 4}
105!18 = !{i32 2, !"Debug Info Version", i32 3}
106!19 = !{i32 1, !"wchar_size", i32 4}
107!20 = !{i32 7, !"PIC Level", i32 2}
108!21 = !{!"clang version 11.0.0 (https://github.com/llvm/llvm-project d3588d0814c4cbc7fca677b4d9634f6e1428a331)"}
109!22 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !23, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !25)
110!23 = !DISubroutineType(types: !24)
111!24 = !{!9}
112!25 = !{!26}
113!26 = !DILocalVariable(name: "l_1546", scope: !27, file: !3, line: 11, type: !32)
114!27 = distinct !DILexicalBlock(scope: !28, file: !3, line: 10, column: 10)
115!28 = distinct !DILexicalBlock(scope: !29, file: !3, line: 8, column: 9)
116!29 = distinct !DILexicalBlock(scope: !30, file: !3, line: 6, column: 23)
117!30 = distinct !DILexicalBlock(scope: !31, file: !3, line: 6, column: 3)
118!31 = distinct !DILexicalBlock(scope: !22, file: !3, line: 6, column: 3)
119!32 = !DICompositeType(tag: DW_TAG_array_type, baseType: !33, size: 288, elements: !34)
120!33 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
121!34 = !{!35, !36, !35}
122!35 = !DISubrange(count: 3)
123!36 = !DISubrange(count: 4)
124!37 = !DILocation(line: 4, column: 10, scope: !38)
125!38 = distinct !DILexicalBlock(scope: !39, file: !3, line: 4, column: 3)
126!39 = distinct !DILexicalBlock(scope: !22, file: !3, line: 4, column: 3)
127!40 = !{!41, !41, i64 0}
128!41 = !{!"int", !42, i64 0}
129!42 = !{!"omnipotent char", !43, i64 0}
130!43 = !{!"Simple C/C++ TBAA"}
131!44 = !DILocation(line: 4, column: 12, scope: !38)
132!45 = !DILocation(line: 4, column: 3, scope: !39)
133!46 = !DILocation(line: 6, column: 10, scope: !30)
134!47 = !DILocation(line: 6, column: 12, scope: !30)
135!48 = !DILocation(line: 6, column: 3, scope: !31)
136!49 = !DILocation(line: 4, column: 19, scope: !38)
137!50 = distinct !{!50, !45, !51, !52}
138!51 = !DILocation(line: 5, column: 5, scope: !39)
139!52 = !{!"llvm.loop.unroll.disable"}
140!53 = !DILocation(line: 7, column: 14, scope: !29)
141!54 = !DILocation(line: 8, column: 9, scope: !28)
142!55 = !DILocation(line: 8, column: 9, scope: !29)
143!56 = !DILocation(line: 12, column: 16, scope: !27)
144!57 = !DILocation(line: 6, column: 19, scope: !30)
145!58 = distinct !{!58, !48, !59, !52}
146!59 = !DILocation(line: 14, column: 3, scope: !31)
147!60 = !DILocation(line: 15, column: 1, scope: !22)
148