9fc54c0e80
In Objective-C, forward declarations are currently represented as:
```
DW_TAG_structure_type
DW_AT_name ("Foo")
DW_AT_declaration (true)
DW_AT_APPLE_runtime_class (DW_LANG_ObjC)
```
However, when compiling with `-gmodules`, when a class definition is
turned into a forward declaration within a `DW_TAG_module`, the DIE for
the forward declaration looks as follows:
```
DW_TAG_structure_type
DW_AT_name ("Foo")
DW_AT_declaration (true)
```
Note the absence of `DW_AT_APPLE_runtime_class`. With recent changes in
LLDB, not being able to differentiate between C++ and Objective-C
forward declarations has become problematic (see attached test-case and
explanation in https://github.com/llvm/llvm-project/pull/119860).
89 lines
3.3 KiB
Objective-C
89 lines
3.3 KiB
Objective-C
// UNSUPPORTED: target={{.*}}-zos{{.*}}, target={{.*}}-aix{{.*}}
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// Test that debug info is emitted for an Objective-C module and
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// a precompiled header.
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// REQUIRES: asserts
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// Modules:
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// RUN: rm -rf %t
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// RUN: %clang_cc1 -x objective-c -fmodules -fmodule-format=obj \
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// RUN: -fimplicit-module-maps -DMODULES -fmodules-cache-path=%t %s \
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// RUN: -I %S/Inputs -I %t -emit-llvm -o %t.ll \
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// RUN: -mllvm -debug-only=pchcontainer &>%t-mod.ll
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// RUN: cat %t-mod.ll | FileCheck %s
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// RUN: cat %t-mod.ll | FileCheck %s --check-prefix=CHECK2
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// PCH:
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// RUN: %clang_cc1 -x objective-c -emit-pch -fmodule-format=obj -I %S/Inputs \
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// RUN: -o %t.pch %S/Inputs/DebugObjC.h \
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// RUN: -mllvm -debug-only=pchcontainer &>%t-pch.ll
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// RUN: cat %t-pch.ll | FileCheck %s
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// RUN: cat %t-pch.ll | FileCheck %s --check-prefix=CHECK2
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#ifdef MODULES
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@import DebugObjC;
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#endif
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// CHECK: distinct !DICompileUnit(language: DW_LANG_ObjC, file: ![[FILE:[0-9]+]],
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// CHECK-SAME: isOptimized: false
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// CHECK: ![[FILE]] = !DIFile(filename: "{{DebugObjC|.*DebugObjC.h}}"
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// CHECK: !DICompositeType(tag: DW_TAG_enumeration_type,
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// CHECK-SAME: scope: ![[MODULE:[0-9]+]],
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// CHECK: ![[MODULE]] = !DIModule(scope: null, name: "DebugObjC
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// CHECK: ![[TD_ENUM:.*]] = !DICompositeType(tag: DW_TAG_enumeration_type,
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// CHECK-NOT: name:
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// CHECK-SAME: elements:
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// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "FwdDecl",
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// CHECK-SAME: scope: ![[MODULE]],
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// CHECK-SAME: runtimeLang: DW_LANG_ObjC
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// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "ObjCClass",
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// CHECK-SAME: scope: ![[MODULE]],
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// CHECK-SAME: elements
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// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "ObjCClassWithPrivateIVars",
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// CHECK-SAME: scope: ![[MODULE]],
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// CHECK-SAME: elements
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// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "FwdDeclared"
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// CHECK-SAME: elements:
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// CHECK: ![[TD_UNION:.*]] = distinct !DICompositeType(tag: DW_TAG_union_type,
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// CHECK-NOT: name:
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// CHECK-SAME: elements:
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// CHECK: !DIDerivedType(tag: DW_TAG_typedef, name: "TypedefUnion",
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// CHECK-SAME: baseType: ![[TD_UNION]])
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// CHECK: !DIDerivedType(tag: DW_TAG_typedef, name: "TypedefEnum",
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// CHECK-SAME: baseType: ![[TD_ENUM:.*]])
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// CHECK: ![[TD_STRUCT:.*]] = distinct !DICompositeType(tag: DW_TAG_structure_type,
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// CHECK-NOT: name:
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// CHECK-SAME: elements:
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// CHECK: !DIDerivedType(tag: DW_TAG_typedef, name: "TypedefStruct",
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// CHECK-SAME: baseType: ![[TD_STRUCT]])
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// CHECK: !DICompositeType(tag: DW_TAG_union_type,
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// CHECK-NOT: name:
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// CHECK-SAME: )
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// CHECK: !DICompositeType(tag: DW_TAG_structure_type,
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// CHECK-NOT: name:
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// CHECK-SAME: )
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// CHECK-NEG-NOT: !DICompositeType(tag: DW_TAG_structure_type, name: "PureForwardDecl"
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// The output order is sublty different for module vs. pch,
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// so these are checked separately:
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//
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// CHECK2: !DICompositeType(tag: DW_TAG_structure_type, name: "FwdDecl",
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// CHECK2: !DICompositeType(tag: DW_TAG_structure_type, name: "ObjCClass",
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// CHECK2: !DIObjCProperty(name: "property",
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// CHECK2: !DIDerivedType(tag: DW_TAG_member, name: "ivar"
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// CHECK2: !DIDerivedType(tag: DW_TAG_typedef, name: "InnerEnum"
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