1; RUN: llc -mtriple=mips64-unknown-freebsd -target-abi n64 -relocation-model pic -verify-machineinstrs -o /dev/null %s -O2 2 3; Test that the presence of debug information does not cause the branch folder 4; to rewrite branches to have negative basic block ids, which would cause the 5; long branch pass to crash. 6 7@c = external global i32, align 4 8 9define void @e() !dbg !19 { 10entry: 11 %0 = load i32, i32* @c, align 4, !dbg !28, !tbaa !31 12 %tobool8 = icmp eq i32 %0, 0, !dbg !35 13 br i1 %tobool8, label %for.end, label %for.body.preheader, !dbg !35 14 15for.body.preheader: ; preds = %entry 16 br label %for.body, !dbg !36 17 18for.body: ; preds = %for.body.preheader 19 %1 = load i8, i8* undef, align 1, !dbg !36, !tbaa !38 20 %conv = zext i8 %1 to i32, !dbg !36 21 %cmp = icmp sgt i32 %0, %conv, !dbg !39 22 br i1 %cmp, label %if.end, label %if.then, !dbg !40 23 24if.then: ; preds = %for.body 25 tail call void @llvm.dbg.value(metadata i32 %conv, metadata !41, metadata !DIExpression()), !dbg !43 26 %idxprom5 = zext i8 %1 to i64, !dbg !44 27 %call = tail call i32 bitcast (i32 (...)* @g to i32 (i32)*)(i32 signext undef) #3, !dbg !45 28 br label %if.end, !dbg !46 29 30if.end: ; preds = %if.then, %for.body 31 unreachable 32 33for.end: ; preds = %entry 34 ret void 35} 36 37declare i32 @g(...) 38 39declare void @llvm.dbg.value(metadata, metadata, metadata) 40 41!llvm.dbg.cu = !{!0} 42!llvm.module.flags = !{!17, !18} 43 44!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3) 45!1 = !DIFile(filename: "/local/scratch/alr48/cheri/llvm/tools/clang/test/CodeGen/<stdin>", directory: "/local/scratch/alr48/cheri/llvm/cmake-build-debug/tools/clang/test/CodeGen") 46!2 = !{} 47!3 = !{!4, !9, !13, !15} 48!4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression()) 49!5 = distinct !DIGlobalVariable(name: "a", scope: !0, file: !6, line: 6, type: !7, isLocal: false, isDefinition: true) 50!6 = !DIFile(filename: "/crash.c", directory: "/tmp") 51!7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64) 52!8 = !DIBasicType(name: "unsigned char", size: 8, encoding: DW_ATE_unsigned_char) 53!9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression()) 54!10 = distinct !DIGlobalVariable(name: "b", scope: !0, file: !6, line: 7, type: !11, isLocal: false, isDefinition: true) 55!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64) 56!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 57!13 = !DIGlobalVariableExpression(var: !14, expr: !DIExpression()) 58!14 = distinct !DIGlobalVariable(name: "c", scope: !0, file: !6, line: 8, type: !12, isLocal: false, isDefinition: true) 59!15 = !DIGlobalVariableExpression(var: !16, expr: !DIExpression()) 60!16 = distinct !DIGlobalVariable(name: "d", scope: !0, file: !6, line: 8, type: !12, isLocal: false, isDefinition: true) 61!17 = !{i32 2, !"Debug Info Version", i32 3} 62!18 = !{i32 7, !"PIC Level", i32 2} 63!19 = distinct !DISubprogram(name: "e", scope: !6, file: !6, line: 9, type: !20, isLocal: false, isDefinition: true, scopeLine: 9, isOptimized: true, unit: !0, retainedNodes: !22) 64!20 = !DISubroutineType(types: !21) 65!21 = !{!12} 66!22 = !{!23} 67!23 = !DILocalVariable(name: "f", scope: !24, file: !6, line: 12, type: !12) 68!24 = distinct !DILexicalBlock(scope: !25, file: !6, line: 11, column: 20) 69!25 = distinct !DILexicalBlock(scope: !26, file: !6, line: 11, column: 9) 70!26 = distinct !DILexicalBlock(scope: !27, file: !6, line: 10, column: 3) 71!27 = distinct !DILexicalBlock(scope: !19, file: !6, line: 10, column: 3) 72!28 = !DILocation(line: 10, column: 10, scope: !29) 73!29 = distinct !DILexicalBlock(scope: !30, file: !6, line: 10, column: 3) 74!30 = distinct !DILexicalBlock(scope: !19, file: !6, line: 10, column: 3) 75!31 = !{!32, !32, i64 0} 76!32 = !{!"int", !33, i64 0} 77!33 = !{!"omnipotent char", !34, i64 0} 78!34 = !{!"Simple C/C++ TBAA"} 79!35 = !DILocation(line: 10, column: 3, scope: !30) 80!36 = !DILocation(line: 11, column: 9, scope: !37) 81!37 = distinct !DILexicalBlock(scope: !29, file: !6, line: 11, column: 9) 82!38 = !{!33, !33, i64 0} 83!39 = !DILocation(line: 11, column: 14, scope: !37) 84!40 = !DILocation(line: 11, column: 9, scope: !29) 85!41 = !DILocalVariable(name: "f", scope: !42, file: !6, line: 12, type: !12) 86!42 = distinct !DILexicalBlock(scope: !37, file: !6, line: 11, column: 20) 87!43 = !DILocation(line: 12, column: 11, scope: !42) 88!44 = !DILocation(line: 13, column: 9, scope: !42) 89!45 = !DILocation(line: 13, column: 7, scope: !42) 90!46 = !DILocation(line: 14, column: 5, scope: !42) 91