1; RUN: opt -jump-threading -S < %s | FileCheck %s
2
3define dso_local i32 @_Z3fooi(i32 %a) !dbg !7 {
4entry:
5  call void @llvm.dbg.value(metadata i32 %a, metadata !12, metadata !DIExpression()), !dbg !13
6  call void @llvm.dbg.value(metadata i32 1, metadata !14, metadata !DIExpression()), !dbg !13
7  %tobool = icmp ne i32 %a, 0, !dbg !15
8  br i1 %tobool, label %if.then, label %if.end, !dbg !17
9
10if.then:                                          ; preds = %entry
11  call void @_Z4callv(), !dbg !18
12  call void @llvm.dbg.value(metadata i32 0, metadata !14, metadata !DIExpression()), !dbg !13
13  br label %if.end, !dbg !20
14
15if.end:                                           ; preds = %if.then, %entry
16  %c.0 = phi i32 [ 0, %if.then ], [ 1, %entry ], !dbg !13
17  call void @llvm.dbg.value(metadata i32 %c.0, metadata !14, metadata !DIExpression()), !dbg !13
18  %tobool1 = icmp ne i32 %c.0, 0, !dbg !21
19  br i1 %tobool1, label %if.else, label %if.then2, !dbg !23
20
21; CHECK-LABEL: if.then2:
22; CHECK: call void @llvm.dbg.value({{.+}}, metadata ![[B:[0-9]+]], metadata !DIExpression())
23; CHECK: call void @llvm.dbg.value({{.+}}, metadata ![[B:[0-9]+]], metadata !DIExpression())
24; CHECK-NOT: call void @llvm.dbg.value({{.+}}, metadata ![[B]], metadata !DIExpression())
25if.then2:                                         ; preds = %if.end
26  call void @llvm.dbg.value(metadata i32 4, metadata !24, metadata !DIExpression()), !dbg !13
27  br label %if.end3, !dbg !25
28
29; CHECK-LABEL: if.end3:
30if.else:                                          ; preds = %if.end
31  call void @llvm.dbg.value(metadata i32 6, metadata !24, metadata !DIExpression()), !dbg !13
32  br label %if.end3
33
34if.end3:                                          ; preds = %if.else, %if.then2
35  %b.0 = phi i32 [ 6, %if.else ], [ 4, %if.then2 ], !dbg !27
36  call void @llvm.dbg.value(metadata i32 %b.0, metadata !24, metadata !DIExpression()), !dbg !13
37  ret i32 %b.0, !dbg !28
38}
39; Function Attrs: nounwind readnone speculatable willreturn
40declare void @llvm.dbg.declare(metadata, metadata, metadata)
41declare dso_local void @_Z4callv()
42; Function Attrs: nounwind readnone speculatable willreturn
43declare void @llvm.dbg.value(metadata, metadata, metadata)
44
45!llvm.dbg.cu = !{!0}
46!llvm.module.flags = !{!3, !4, !5}
47!llvm.ident = !{!6}
48
49; CHECK: ![[B]] = !DILocalVariable(name: "b"
50!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
51!1 = !DIFile(filename: "test.cpp", directory: "/")
52!2 = !{}
53!3 = !{i32 7, !"Dwarf Version", i32 4}
54!4 = !{i32 2, !"Debug Info Version", i32 3}
55!5 = !{i32 1, !"wchar_size", i32 4}
56!6 = !{!"clang version 10.0.0"}
57!7 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooi", scope: !8, file: !8, line: 3, type: !9, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
58!8 = !DIFile(filename: "./test.cpp", directory: "/")
59!9 = !DISubroutineType(types: !10)
60!10 = !{!11, !11}
61!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
62!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !8, line: 3, type: !11)
63!13 = !DILocation(line: 0, scope: !7)
64!14 = !DILocalVariable(name: "c", scope: !7, file: !8, line: 4, type: !11)
65!15 = !DILocation(line: 5, column: 7, scope: !16)
66!16 = distinct !DILexicalBlock(scope: !7, file: !8, line: 5, column: 7)
67!17 = !DILocation(line: 5, column: 7, scope: !7)
68!18 = !DILocation(line: 6, column: 5, scope: !19)
69!19 = distinct !DILexicalBlock(scope: !16, file: !8, line: 5, column: 10)
70!20 = !DILocation(line: 8, column: 3, scope: !19)
71!21 = !DILocation(line: 9, column: 8, scope: !22)
72!22 = distinct !DILexicalBlock(scope: !7, file: !8, line: 9, column: 7)
73!23 = !DILocation(line: 9, column: 7, scope: !7)
74!24 = !DILocalVariable(name: "b", scope: !7, file: !8, line: 4, type: !11)
75!25 = !DILocation(line: 11, column: 3, scope: !26)
76!26 = distinct !DILexicalBlock(scope: !22, file: !8, line: 9, column: 11)
77!27 = !DILocation(line: 0, scope: !22)
78!28 = !DILocation(line: 14, column: 3, scope: !7)
79