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[llvm][DebugInfo][test] Add LLVM tests for Objective-C property debug-info
The IR->DWARF pipeline was not properly tested before. This patch adds a test to generate DWARF for various `DIObjCProperty` constructions. This caught a couple of bugs: 1. The `DW_AT_APPLE_property_getter` and `DW_AT_APPLE_property_setter` properties were emitted the wrong way around. 2. The `DW_TAG_member` ivars were not linking back to the property that they back. These will be fixed in follow-up patches. (cherry picked from commit dcdf5d6)
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‎llvm/test/DebugInfo/Generic/objc-property.ll‎

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; RUN: llc -filetype=obj -o - %s | llvm-dwarfdump --debug-info - | FileCheck %s
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; CHECK: DW_TAG_structure_type
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; CHECK: DW_AT_name ("Foo")
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;
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; CHECK: DW_TAG_APPLE_property
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; CHECK: DW_AT_APPLE_property_name ("autoSynthProp")
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; CHECK: DW_AT_APPLE_property_attribute
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; CHECK-SAME: DW_APPLE_PROPERTY_assign, DW_APPLE_PROPERTY_readwrite,
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; CHECK-SAME: DW_APPLE_PROPERTY_atomic, DW_APPLE_PROPERTY_unsafe_unretained
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;
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; CHECK: DW_TAG_APPLE_property
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; CHECK: DW_AT_APPLE_property_name ("synthProp")
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; CHECK: DW_AT_APPLE_property_attribute
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; CHECK-SAME: DW_APPLE_PROPERTY_assign, DW_APPLE_PROPERTY_readwrite,
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; CHECK-SAME: DW_APPLE_PROPERTY_atomic, DW_APPLE_PROPERTY_unsafe_unretained
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;
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; FIXME: this should have a DW_AT_APPLE_property_getter tag
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; CHECK: DW_TAG_APPLE_property
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; CHECK: DW_AT_APPLE_property_name ("customGetterProp")
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; CHECK: DW_AT_APPLE_property_setter ("customGetter")
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; CHECK: DW_AT_APPLE_property_attribute
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; CHECK-SAME: DW_APPLE_PROPERTY_getter, DW_APPLE_PROPERTY_assign, DW_APPLE_PROPERTY_readwrite,
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; CHECK-SAME: DW_APPLE_PROPERTY_atomic, DW_APPLE_PROPERTY_unsafe_unretained
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;
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; FIXME: this should have a DW_AT_APPLE_property_setter tag
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; CHECK: DW_TAG_APPLE_property
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; CHECK: DW_AT_APPLE_property_name ("customSetterProp")
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; CHECK: DW_AT_APPLE_property_getter ("customSetter:")
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; CHECK: DW_AT_APPLE_property_attribute
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; CHECK-SAME: DW_APPLE_PROPERTY_assign, DW_APPLE_PROPERTY_readwrite,
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; CHECK-SAME: DW_APPLE_PROPERTY_setter, DW_APPLE_PROPERTY_atomic, DW_APPLE_PROPERTY_unsafe_unretained
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;
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; FIXME: the DW_AT_APPLE_property_(getter|setter) values are inverted
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; CHECK: DW_TAG_APPLE_property
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; CHECK: DW_AT_APPLE_property_name ("customAccessorsProp")
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; CHECK: DW_AT_APPLE_property_getter ("customSetter:")
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; CHECK: DW_AT_APPLE_property_setter ("customGetter")
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; CHECK: DW_AT_APPLE_property_attribute
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; CHECK-SAME: DW_APPLE_PROPERTY_getter, DW_APPLE_PROPERTY_assign, DW_APPLE_PROPERTY_readwrite,
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; CHECK-SAME: DW_APPLE_PROPERTY_setter, DW_APPLE_PROPERTY_atomic, DW_APPLE_PROPERTY_unsafe_unretained
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;
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; FIXME: missing link between DW_TAG_member and the associated DW_TAG_APPLE_property
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; CHECK: DW_TAG_member
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; CHECK-NOT: DW_AT_APPLE_property
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; CHECK: DW_TAG_member
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; CHECK-NOT: DW_AT_APPLE_property
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; CHECK: DW_TAG_member
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; CHECK-NOT: DW_AT_APPLE_property
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; CHECK: DW_TAG_member
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; CHECK-NOT: DW_AT_APPLE_property
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!llvm.module.flags = !{!7, !8}
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!llvm.dbg.cu = !{!13}
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!7 = !{i32 7, !"Dwarf Version", i32 5}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!13 = distinct !DICompileUnit(language: DW_LANG_ObjC, file: !14, producer: "hand written", isOptimized: false, runtimeVersion: 2, emissionKind: FullDebug, retainedTypes: !15, splitDebugInlining: false, debugInfoForProfiling: true, nameTableKind: Apple)
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!14 = !DIFile(filename: "main.m", directory: "/tmp")
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!15 = !{!16}
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!16 = !DICompositeType(tag: DW_TAG_structure_type, name: "Foo", scope: !14, file: !14, line: 1, size: 128, flags: DIFlagObjcClassComplete, elements: !17, runtimeLang: DW_LANG_ObjC)
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!17 = !{!18, !20, !21, !22, !23, !24, !25, !26, !27, !28, !35, !38, !39, !40, !41, !42, !43}
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!18 = !DIObjCProperty(name: "autoSynthProp", file: !14, line: 5, attributes: 2316, type: !19)
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!19 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!20 = !DIObjCProperty(name: "synthProp", file: !14, line: 6, attributes: 2316, type: !19)
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!21 = !DIObjCProperty(name: "customGetterProp", file: !14, line: 7, getter: "customGetter", attributes: 2318, type: !19)
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!22 = !DIObjCProperty(name: "customSetterProp", file: !14, line: 8, setter: "customSetter:", attributes: 2444, type: !19)
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!23 = !DIObjCProperty(name: "customAccessorsProp", file: !14, line: 9, setter: "customSetter:", getter: "customGetter", attributes: 2446, type: !19)
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!24 = !DIDerivedType(tag: DW_TAG_member, name: "someBackingIvar", scope: !14, file: !14, line: 2, baseType: !19, size: 32, flags: DIFlagProtected, extraData: !20)
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!25 = !DIDerivedType(tag: DW_TAG_member, name: "_autoSynthProp", scope: !14, file: !14, line: 5, baseType: !19, size: 32, flags: DIFlagPrivate, extraData: !18)
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!26 = !DIDerivedType(tag: DW_TAG_member, name: "_customGetterProp", scope: !14, file: !14, line: 7, baseType: !19, size: 32, flags: DIFlagPrivate, extraData: !21)
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!27 = !DIDerivedType(tag: DW_TAG_member, name: "_customSetterProp", scope: !14, file: !14, line: 8, baseType: !19, size: 32, flags: DIFlagPrivate, extraData: !22)
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!28 = !DISubprogram(name: "-[Foo customGetter]", scope: !16, file: !14, line: 19, type: !29, scopeLine: 19, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit)
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!29 = !DISubroutineType(types: !30)
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!30 = !{!19, !31, !32}
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!31 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!32 = !DIDerivedType(tag: DW_TAG_typedef, name: "SEL", file: !14, baseType: !33, flags: DIFlagArtificial)
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!33 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !34, size: 64)
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!34 = !DICompositeType(tag: DW_TAG_structure_type, name: "objc_selector", file: !14, flags: DIFlagFwdDecl)
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!35 = !DISubprogram(name: "-[Foo customSetter:]", scope: !16, file: !14, line: 23, type: !36, scopeLine: 23, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit)
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!36 = !DISubroutineType(types: !37)
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!37 = !{null, !31, !32, !19}
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!38 = !DISubprogram(name: "-[Foo synthProp]", scope: !16, file: !14, line: 17, type: !29, scopeLine: 17, flags: DIFlagArtificial | DIFlagPrototyped, spFlags: DISPFlagLocalToUnit)
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!39 = !DISubprogram(name: "-[Foo setSynthProp:]", scope: !16, file: !14, line: 17, type: !36, scopeLine: 17, flags: DIFlagArtificial | DIFlagPrototyped, spFlags: DISPFlagLocalToUnit)
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!40 = !DISubprogram(name: "-[Foo autoSynthProp]", scope: !16, file: !14, line: 5, type: !29, scopeLine: 5, flags: DIFlagArtificial | DIFlagPrototyped, spFlags: DISPFlagLocalToUnit)
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!41 = !DISubprogram(name: "-[Foo setAutoSynthProp:]", scope: !16, file: !14, line: 5, type: !36, scopeLine: 5, flags: DIFlagArtificial | DIFlagPrototyped, spFlags: DISPFlagLocalToUnit)
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!42 = !DISubprogram(name: "-[Foo setCustomGetterProp:]", scope: !16, file: !14, line: 7, type: !36, scopeLine: 7, flags: DIFlagArtificial | DIFlagPrototyped, spFlags: DISPFlagLocalToUnit)
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!43 = !DISubprogram(name: "-[Foo customSetterProp]", scope: !16, file: !14, line: 8, type: !29, scopeLine: 8, flags: DIFlagArtificial | DIFlagPrototyped, spFlags: DISPFlagLocalToUnit)

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