1 2; RUN: llc -mtriple=i386-linux-gnu -filetype=obj -relocation-model=pic %s -o /dev/null 3 4; Derived from the test case in PR20367, there's nothing really positive to 5; test here (hence no FileCheck, etc). All that was wrong is that the debug info 6; intrinsics (introduced by inlining) in 'f1' were causing codegen to crash, but 7; since 'f1' is a nodebug function, there's no positive outcome to confirm, just 8; that debug info doesn't get in the way/cause a crash. 9 10; The test case isn't particularly well reduced/tidy, but as simple as I could 11; get the C++ source. I assume the complexity is mostly just about producing a 12; certain amount of register pressure, so it might be able to be simplified/made 13; more uniform. 14 15; Generated from: 16; $ clang-tot -cc1 -triple i386 -emit-obj -g -O3 repro.cpp 17; void sink(const ptr); 18; int source(); 19; void f3(int); 20; 21; extern bool b; 22; 23; struct string { 24; unsigned *mem; 25; }; 26; 27; extern string &str; 28; 29; inline __attribute__((always_inline)) void s2(string *lhs) { sink(lhs->mem); } 30; inline __attribute__((always_inline)) void f() { 31; string str2; 32; s2(&str2); 33; sink(&str2); 34; } 35; void __attribute__((nodebug)) f1() { 36; for (int iter = 0; iter != 2; ++iter) { 37; f(); 38; sink(str.mem); 39; if (b) return; 40; } 41; } 42 43%struct.string = type { ptr } 44 45@str = external constant ptr 46@b = external global i8 47 48; Function Attrs: nounwind 49define void @_Z2f1v() #0 { 50entry: 51 %str2.i = alloca %struct.string, align 4 52 %0 = load ptr, ptr @str, align 4 53 br label %for.body 54 55for.body: ; preds = %for.body, %entry 56 %iter.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 57 call void @llvm.lifetime.start(i64 4, ptr %str2.i), !dbg !26 58 call void @llvm.dbg.value(metadata ptr %str2.i, metadata !16, metadata !DIExpression(DW_OP_deref)) #3, !dbg !26 59 call void @llvm.dbg.value(metadata ptr %str2.i, metadata !27, metadata !DIExpression(DW_OP_deref)) #3, !dbg !29 60 call void @_Z4sinkPKv(ptr undef) #3, !dbg !29 61 call void @_Z4sinkPKv(ptr %str2.i) #3, !dbg !30 62 call void @llvm.lifetime.end(i64 4, ptr %str2.i), !dbg !31 63 %1 = load ptr, ptr %0, align 4, !tbaa !32 64 call void @_Z4sinkPKv(ptr %1) #3 65 %2 = load i8, ptr @b, align 1, !tbaa !37, !range !39 66 %tobool = icmp ne i8 %2, 0 67 %inc = add nsw i32 %iter.02, 1 68 %cmp = icmp eq i32 %inc, 2 69 %or.cond = or i1 %tobool, %cmp 70 br i1 %or.cond, label %for.end, label %for.body 71 72for.end: ; preds = %for.body 73 ret void 74} 75 76declare void @_Z4sinkPKv(ptr) #1 77 78; Function Attrs: nounwind readnone 79declare void @llvm.dbg.value(metadata, metadata, metadata) #2 80 81; Function Attrs: nounwind 82declare void @llvm.lifetime.start(i64, ptr nocapture) #3 83 84; Function Attrs: nounwind 85declare void @llvm.lifetime.end(i64, ptr nocapture) #3 86 87attributes #0 = { nounwind "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 88attributes #1 = { "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 89attributes #2 = { nounwind readnone } 90attributes #3 = { nounwind } 91 92!llvm.dbg.cu = !{!0} 93!llvm.module.flags = !{!23, !24} 94!llvm.ident = !{!25} 95 96!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !2, imports: !2) 97!1 = !DIFile(filename: "<stdin>", directory: "/tmp/dbginfo") 98!2 = !{} 99!3 = !{!4} 100!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "string", line: 7, size: 32, align: 32, file: !5, elements: !6, identifier: "_ZTS6string") 101!5 = !DIFile(filename: "repro.cpp", directory: "/tmp/dbginfo") 102!6 = !{!7} 103!7 = !DIDerivedType(tag: DW_TAG_member, name: "mem", line: 8, size: 32, align: 32, file: !5, scope: !4, baseType: !8) 104!8 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: !9) 105!9 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned) 106!11 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", line: 14, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 14, file: !5, scope: !12, type: !13, retainedNodes: !15) 107!12 = !DIFile(filename: "repro.cpp", directory: "/tmp/dbginfo") 108!13 = !DISubroutineType(types: !14) 109!14 = !{null} 110!15 = !{!16} 111!16 = !DILocalVariable(name: "str2", line: 15, scope: !11, file: !12, type: !4) 112!17 = distinct !DISubprogram(name: "s2", linkageName: "_Z2s2P6string", line: 13, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 13, file: !5, scope: !12, type: !18, retainedNodes: !21) 113!18 = !DISubroutineType(types: !19) 114!19 = !{null, !20} 115!20 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: !4) 116!21 = !{!22} 117!22 = !DILocalVariable(name: "lhs", line: 13, arg: 1, scope: !17, file: !12, type: !20) 118!23 = !{i32 2, !"Dwarf Version", i32 4} 119!24 = !{i32 2, !"Debug Info Version", i32 3} 120!25 = !{!"clang version 3.5.0 "} 121!26 = !DILocation(line: 15, scope: !11) 122!27 = !DILocalVariable(name: "lhs", line: 13, arg: 1, scope: !17, file: !12, type: !20) 123!28 = !DILocation(line: 16, scope: !11) 124!29 = !DILocation(line: 13, scope: !17, inlinedAt: !28) 125!30 = !DILocation(line: 17, scope: !11) 126!31 = !DILocation(line: 18, scope: !11) 127!32 = !{!33, !34, i64 0} 128!33 = !{!"struct", !34, i64 0} 129!34 = !{!"any pointer", !35, i64 0} 130!35 = !{!"omnipotent char", !36, i64 0} 131!36 = !{!"Simple C/C++ TBAA"} 132!37 = !{!38, !38, i64 0} 133!38 = !{!"bool", !35, i64 0} 134!39 = !{i8 0, i8 2} 135