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 9 define void @e() !dbg !19 { 10 entry: 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 15 for.body.preheader: ; preds = %entry 16 br label %for.body, !dbg !36 17 18 for.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 24 if.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 30 if.end: ; preds = %if.then, %for.body 31 unreachable 32 33 for.end: ; preds = %entry 34 ret void 35 } 36 37 declare i32 @g(...) 38 39 declare 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
