| ; Choosing CodeView generates debug metadata for class-scope typedefs that |
| ; Dwarf would normally omit. Choosing both CodeView and Dwarf triggered |
| ; assertion failures and crashes because the Dwarf handler wasn't prepared for |
| ; those records (in particular, ones with the void type represented by a |
| ; null pointer). |
| ; |
| ; This test was generated with: |
| ; clang++ -cc1 -emit-llvm -debug-info-kind=limited -dwarf-version=4 -gcodeview -x c++ |
| ; on the following source code: |
| ; |
| ; class A { |
| ; typedef void _Nodeptr; |
| ; }; |
| ; class B { |
| ; A FailedTestsCache; |
| ; bool m_fn1(); |
| ; }; |
| ; bool B::m_fn1() {} |
| ; |
| ; CodeView generates a DIDerivedType for the _Nodeptr typedef. |
| ; |
| ; RUN: llc %s -o - 2>&1 | FileCheck %s |
| ; CHECK-NOT: Assertion failed |
| |
| ; ModuleID = 'bug.cpp' |
| source_filename = "bug.cpp" |
| target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" |
| target triple = "i686-pc-windows-msvc" |
| |
| %class.B = type { %class.A } |
| %class.A = type { i8 } |
| |
| ; Function Attrs: noinline nounwind optnone |
| define x86_thiscallcc zeroext i1 @"\01?m_fn1@B@@AAE_NXZ"(ptr %this) #0 align 2 !dbg !9 { |
| entry: |
| %retval = alloca i1, align 1 |
| %this.addr = alloca ptr, align 4 |
| store ptr %this, ptr %this.addr, align 4 |
| call void @llvm.dbg.declare(metadata ptr %this.addr, metadata !22, metadata !DIExpression()), !dbg !24 |
| %this1 = load ptr, ptr %this.addr, align 4 |
| call void @llvm.trap(), !dbg !25 |
| unreachable, !dbg !25 |
| |
| return: ; No predecessors! |
| %0 = load i1, ptr %retval, align 1, !dbg !25 |
| ret i1 %0, !dbg !25 |
| } |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 |
| |
| ; Function Attrs: noreturn nounwind |
| declare void @llvm.trap() #2 |
| |
| attributes #0 = { noinline nounwind optnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #1 = { nounwind readnone speculatable } |
| attributes #2 = { noreturn nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !6, !7} |
| !llvm.ident = !{!8} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 6.0.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "<stdin>", directory: "D:\5Csrc\5Cbug", checksumkind: CSK_MD5, checksum: "2216f11c5ddda8c48a6f92a6079ad4b6") |
| !2 = !{} |
| !3 = !{i32 1, !"NumRegisterParameters", i32 0} |
| !4 = !{i32 2, !"Dwarf Version", i32 4} |
| !5 = !{i32 2, !"CodeView", i32 1} |
| !6 = !{i32 2, !"Debug Info Version", i32 3} |
| !7 = !{i32 1, !"wchar_size", i32 2} |
| !8 = !{!"clang version 6.0.0 "} |
| !9 = distinct !DISubprogram(name: "m_fn1", linkageName: "\01?m_fn1@B@@AAE_NXZ", scope: !11, file: !10, line: 8, type: !18, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !0, declaration: !17, retainedNodes: !2) |
| !10 = !DIFile(filename: "bug.cpp", directory: "D:\5Csrc\5Cbug", checksumkind: CSK_MD5, checksum: "2216f11c5ddda8c48a6f92a6079ad4b6") |
| !11 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "B", file: !10, line: 4, size: 8, elements: !12, identifier: ".?AVB@@") |
| !12 = !{!13, !17} |
| !13 = !DIDerivedType(tag: DW_TAG_member, name: "FailedTestsCache", scope: !11, file: !10, line: 5, baseType: !14, size: 8) |
| !14 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "A", file: !10, line: 1, size: 8, elements: !15, identifier: ".?AVA@@") |
| !15 = !{!16} |
| !16 = !DIDerivedType(tag: DW_TAG_typedef, name: "_Nodeptr", scope: !14, file: !10, line: 2, baseType: null) |
| !17 = !DISubprogram(name: "m_fn1", linkageName: "\01?m_fn1@B@@AAE_NXZ", scope: !11, file: !10, line: 6, type: !18, isLocal: false, isDefinition: false, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: false) |
| !18 = !DISubroutineType(cc: DW_CC_BORLAND_thiscall, types: !19) |
| !19 = !{!20, !21} |
| !20 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean) |
| !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 32, flags: DIFlagArtificial | DIFlagObjectPointer) |
| !22 = !DILocalVariable(name: "this", arg: 1, scope: !9, type: !23, flags: DIFlagArtificial | DIFlagObjectPointer) |
| !23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 32) |
| !24 = !DILocation(line: 0, scope: !9) |
| !25 = !DILocation(line: 8, scope: !9) |