[llvm] [DebugInfo] Add DW_TAG_property support to LLVM DebugInfo (PR #215776)

[Piotr Jeremicz via llvm-commits]

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@@ -4609,6 +4610,88 @@ class DIObjCProperty : public DINode {
   }
 };
 
+/// A property of a class or structure.
+///
+/// Represents a DWARF \c DW_TAG_property: an entity that is syntactically
+/// accessed like a data member, but whose access is implemented by invoking a
+/// user-defined or compiler-generated accessor.
+///
+/// Currently only the backing storage is modelled, and it must be a data
+/// member holding the property's storage.
+class DIProperty : public DINode {
+  friend class LLVMContextImpl;
+  friend class MDNode;
+
+  unsigned Line;
+
+  DIProperty(LLVMContext &C, StorageType Storage, unsigned Line,
+             ArrayRef<Metadata *> Ops);
+  ~DIProperty() = default;
+
+  static DIProperty *getImpl(LLVMContext &Context, StringRef Name,
+                             DIFile *File, unsigned Line, DIType *Type,
+                             DINode *BackingStorage, StorageType Storage,
+                             bool ShouldCreate = true) {
+    return getImpl(Context, getCanonicalMDString(Context, Name), File, Line,
+                   Type, BackingStorage, Storage, ShouldCreate);
+  }
+  LLVM_ABI static DIProperty *getImpl(LLVMContext &Context, MDString *Name,
+                                      Metadata *File, unsigned Line,
+                                      Metadata *Type, Metadata *BackingStorage,
+                                      StorageType Storage,
+                                      bool ShouldCreate = true);
+
+  TempDIProperty cloneImpl() const {
+    return getTemporary(getContext(), getName(), getFile(), getLine(),
+                        getType(), getBackingStorage());
+  }
+
+public:
+  DEFINE_MDNODE_GET(DIProperty,
+                    (StringRef Name, DIFile *File, unsigned Line, DIType *Type,
+                     DINode *BackingStorage),
+                    (Name, File, Line, Type, BackingStorage))
+  DEFINE_MDNODE_GET(DIProperty,
+                    (MDString * Name, Metadata *File, unsigned Line,
+                     Metadata *Type, Metadata *BackingStorage),
+                    (Name, File, Line, Type, BackingStorage))
+
+  TempDIProperty clone() const { return cloneImpl(); }
+
+  unsigned getLine() const { return Line; }
+  StringRef getName() const { return getStringOperand(0); }
+  DIFile *getFile() const { return cast_or_null<DIFile>(getRawFile()); }
+  DIType *getType() const { return cast_or_null<DIType>(getRawType()); }
+
+  /// The data member holding the property's backing storage, i.e. the target
+  /// of \c DW_AT_property_forward on this property's
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piotrekjeremicz wrote:

Done 😊 

https://github.com/llvm/llvm-project/pull/215776