1; RUN: llc -mtriple mips64-unknown-freebsd12.0 -relocation-model pic -mcpu=mips4 -target-abi n64 -O2 -verify-machineinstrs -o - %s
2
3; Test that the long branch pass does not crash due to the control flow
4; optimizer producing malformed basic block operands due to the backend
5; failing to handle debug information around branch instructions.
6
7define void @f() !dbg !5 {
8entry:
9  %cmp = icmp eq i32 undef, 0, !dbg !16
10  %conv = zext i1 %cmp to i32, !dbg !16
11  tail call void @llvm.dbg.value(metadata i32 %conv, metadata !11, metadata !DIExpression()), !dbg !17
12  %tobool = icmp eq i32 undef, 0, !dbg !18
13  br i1 %tobool, label %if.end, label %cleanup7.critedge, !dbg !21
14
15if.end:                                           ; preds = %entry
16  %call6 = call i32 bitcast (i32 (...)* @j to i32 (i32)*)(i32 signext %conv)
17#4, !dbg !22
18  br label %cleanup7, !dbg !23
19
20cleanup7.critedge:                                ; preds = %entry
21  call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull undef) #4, !dbg !24
22  br label %cleanup7
23
24cleanup7:                                         ; preds = %cleanup7.critedge,
25  ret void
26}
27
28declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
29
30declare i32 @j(...)
31
32declare void @llvm.dbg.value(metadata, metadata, metadata) #3
33attributes #1 = { argmemonly nounwind }
34attributes #3 = { nounwind readnone speculatable }
35attributes #4 = { nounwind }
36
37!llvm.dbg.cu = !{!0}
38!llvm.module.flags = !{!3, !4}
39
40!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang
41version 6.0.0", isOptimized: true, runtimeVersion:
420, emissionKind: FullDebug, enums: !2)
43!1 = !DIFile(filename:
44"/tmp//<stdin>", directory:
45"/tmp/")
46!2 = !{}
47!3 = !{i32 2, !"Debug Info Version", i32 3}
48!4 = !{i32 7, !"PIC Level", i32 2}
49!5 = distinct !DISubprogram(name: "f", scope: !6, file: !6, line: 8, type: !7,
50isLocal: false, isDefinition: true, scopeLine: 8, isOptimized: true, unit: !0,
51retainedNodes: !10)
52!6 = !DIFile(filename:
53"/tmp/test.c",
54directory: "/tmp")
55!7 = !DISubroutineType(types: !8)
56!8 = !{!9}
57!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
58!10 = !{!11, !12, !14}
59!11 = !DILocalVariable(name: "e", scope: !5, file: !6, line: 9, type: !9)
60!12 = !DILocalVariable(name: "g", scope: !13, file: !6, line: 11, type: !9)
61!13 = distinct !DILexicalBlock(scope: !5, file: !6, line: 10, column: 3)
62!14 = !DILocalVariable(name: "d", scope: !13, file: !6, line: 12, type: !15)
63!15 = !DIDerivedType(tag: DW_TAG_typedef, name: "a", file: !6, line: 2,
64baseType: !9)
65!16 = !DILocation(line: 9, column: 15, scope: !5)
66!17 = !DILocation(line: 9, column: 7, scope: !5)
67!18 = !DILocation(line: 12, column: 5, scope: !19)
68!19 = distinct !DILexicalBlock(scope: !20, file: !6, line: 12, column: 5)
69!20 = distinct !DILexicalBlock(scope: !5, file: !6, line: 10, column: 3)
70!21 = !DILocation(line: 12, column: 5, scope: !20)
71!22 = !DILocation(line: 16, column: 3, scope: !5)
72!23 = !DILocation(line: 17, column: 1, scope: !5)
73!24 = !DILocation(line: 15, column: 3, scope: !5)
74