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 7 define void @f() !dbg !5 { 8 entry: 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 15 if.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 20 cleanup7.critedge: ; preds = %entry 21 call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull undef) #4, !dbg !24 22 br label %cleanup7 23 24 cleanup7: ; preds = %cleanup7.critedge, 25 ret void 26 } 27 28 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1 29 30 declare i32 @j(...) 31 32 declare void @llvm.dbg.value(metadata, metadata, metadata) #3 33 attributes #1 = { argmemonly nounwind } 34 attributes #3 = { nounwind readnone speculatable } 35 attributes #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 41 version 6.0.0", isOptimized: true, runtimeVersion: 42 0, 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, 50 isLocal: false, isDefinition: true, scopeLine: 8, isOptimized: true, unit: !0, 51 retainedNodes: !10) 52 !6 = !DIFile(filename: 53 "/tmp/test.c", 54 directory: "/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, 64 baseType: !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