1; RUN: llc < %s -filetype=obj | llvm-readobj - --codeview | FileCheck %s 2; RUN: llc < %s | llvm-mc -filetype=obj --triple=x86_64-windows | llvm-readobj - --codeview | FileCheck %s 3 4; This test checks that types which are used in expressions, but for which 5; there are no variables, known as retained types, get emitted. 6 7; C++ source to regenerate: 8; $ cat /tmp/a.cc 9; struct S { int x; }; 10; int f(void *p) { 11; return static_cast<S*>(p)->x; 12; } 13; $ clang /tmp/a.cc -S -emit-llvm -g -gcodeview -target x86_64-windows-msvc -o t.ll 14 15; CHECK: Struct (0x{{[0-9A-F]+}}) { 16; CHEC-NEXT: TypeLeafKind: LF_STRUCTURE (0x1505) 17; CHEC-NEXT: MemberCount: 0 18; CHEC-NEXT: Properties [ (0x280) 19; CHEC-NEXT: ForwardReference (0x80) 20; CHEC-NEXT: HasUniqueName (0x200) 21; CHEC-NEXT: ] 22; CHEC-NEXT: FieldList: 0x0 23; CHEC-NEXT: DerivedFrom: 0x0 24; CHEC-NEXT: VShape: 0x0 25; CHEC-NEXT: SizeOf: 0 26; CHEC-NEXT: Name: S 27; CHEC-NEXT: LinkageName: .?AUS@@ 28; CHEC-NEXT: } 29 30; CHECK: Struct (0x{{[0-9A-F]+}}) { 31; CHECK-NEXT: TypeLeafKind: LF_STRUCTURE (0x1505) 32; CHECK-NEXT: MemberCount: 1 33; CHECK-NEXT: Properties [ (0x200) 34; CHECK-NEXT: HasUniqueName (0x200) 35; CHECK-NEXT: ] 36; CHECK-NEXT: FieldList: <field list> (0x{{[0-9A-F]+}}) 37; CHECK-NEXT: DerivedFrom: 0x0 38; CHECK-NEXT: VShape: 0x0 39; CHECK-NEXT: SizeOf: 4 40; CHECK-NEXT: Name: S 41; CHECK-NEXT: LinkageName: .?AUS@@ 42; CHECK-NEXT: } 43 44; ModuleID = '/tmp/a.cc' 45source_filename = "/tmp/a.cc" 46target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" 47target triple = "x86_64--windows-msvc18.0.0" 48 49%struct.S = type { i32 } 50 51; Function Attrs: nounwind uwtable 52define i32 @"\01?f@@YAHPEAX@Z"(i8* %p) #0 !dbg !13 { 53entry: 54 %p.addr = alloca i8*, align 8 55 store i8* %p, i8** %p.addr, align 8 56 call void @llvm.dbg.declare(metadata i8** %p.addr, metadata !17, metadata !18), !dbg !19 57 %0 = load i8*, i8** %p.addr, align 8, !dbg !20 58 %1 = bitcast i8* %0 to %struct.S*, !dbg !21 59 %x = getelementptr inbounds %struct.S, %struct.S* %1, i32 0, i32 0, !dbg !22 60 %2 = load i32, i32* %x, align 4, !dbg !22 61 ret i32 %2, !dbg !23 62} 63 64; Function Attrs: nounwind readnone 65declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 66 67attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 68attributes #1 = { nounwind readnone } 69 70!llvm.dbg.cu = !{!0} 71!llvm.module.flags = !{!9, !10, !11} 72!llvm.ident = !{!12} 73 74!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.9.0 (trunk 273441) (llvm/trunk 273449)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3) 75!1 = !DIFile(filename: "/tmp/a.cc", directory: "/usr/local/google/work/llvm/build.release") 76!2 = !{} 77!3 = !{!4} 78!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64, align: 64) 79!5 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !1, line: 1, size: 32, align: 32, elements: !6, identifier: ".?AUS@@") 80!6 = !{!7} 81!7 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !5, file: !1, line: 1, baseType: !8, size: 32, align: 32) 82!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 83!9 = !{i32 2, !"CodeView", i32 1} 84!10 = !{i32 2, !"Debug Info Version", i32 3} 85!11 = !{i32 1, !"PIC Level", i32 2} 86!12 = !{!"clang version 3.9.0 (trunk 273441) (llvm/trunk 273449)"} 87!13 = distinct !DISubprogram(name: "f", linkageName: "\01?f@@YAHPEAX@Z", scope: !1, file: !1, line: 2, type: !14, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 88!14 = !DISubroutineType(types: !15) 89!15 = !{!8, !16} 90!16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64, align: 64) 91!17 = !DILocalVariable(name: "p", arg: 1, scope: !13, file: !1, line: 2, type: !16) 92!18 = !DIExpression() 93!19 = !DILocation(line: 2, column: 13, scope: !13) 94!20 = !DILocation(line: 3, column: 26, scope: !13) 95!21 = !DILocation(line: 3, column: 10, scope: !13) 96!22 = !DILocation(line: 3, column: 30, scope: !13) 97!23 = !DILocation(line: 3, column: 3, scope: !13) 98