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1 2; RUN: llc -mtriple=i386-linux-gnu -filetype=obj -relocation-model=pic %s -o /dev/null3 4; Derived from the test case in PR20367, there's nothing really positive to5; test here (hence no FileCheck, etc). All that was wrong is that the debug info6; intrinsics (introduced by inlining) in 'f1' were causing codegen to crash, but7; since 'f1' is a nodebug function, there's no positive outcome to confirm, just8; 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 could11; get the C++ source. I assume the complexity is mostly just about producing a12; certain amount of register pressure, so it might be able to be simplified/made13; more uniform.14 15; Generated from:16; $ clang-tot -cc1 -triple i386 -emit-obj -g -O3 repro.cpp17; 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 ptr46@b = external global i847 48; Function Attrs: nounwind49define void @_Z2f1v() #0 {50entry:51 %str2.i = alloca %struct.string, align 452 %0 = load ptr, ptr @str, align 453 br label %for.body54 55for.body: ; preds = %for.body, %entry56 %iter.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ]57 call void @llvm.lifetime.start(i64 4, ptr %str2.i), !dbg !2658 call void @llvm.dbg.value(metadata ptr %str2.i, metadata !16, metadata !DIExpression(DW_OP_deref)) #3, !dbg !2659 call void @llvm.dbg.value(metadata ptr %str2.i, metadata !27, metadata !DIExpression(DW_OP_deref)) #3, !dbg !2960 call void @_Z4sinkPKv(ptr undef) #3, !dbg !2961 call void @_Z4sinkPKv(ptr %str2.i) #3, !dbg !3062 call void @llvm.lifetime.end(i64 4, ptr %str2.i), !dbg !3163 %1 = load ptr, ptr %0, align 4, !tbaa !3264 call void @_Z4sinkPKv(ptr %1) #365 %2 = load i8, ptr @b, align 1, !tbaa !37, !range !3966 %tobool = icmp ne i8 %2, 067 %inc = add nsw i32 %iter.02, 168 %cmp = icmp eq i32 %inc, 269 %or.cond = or i1 %tobool, %cmp70 br i1 %or.cond, label %for.end, label %for.body71 72for.end: ; preds = %for.body73 ret void74}75 76declare void @_Z4sinkPKv(ptr) #177 78; Function Attrs: nounwind readnone79declare void @llvm.dbg.value(metadata, metadata, metadata) #280 81; Function Attrs: nounwind82declare void @llvm.lifetime.start(i64, ptr nocapture) #383 84; Function Attrs: nounwind85declare void @llvm.lifetime.end(i64, ptr nocapture) #386 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" "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" "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