IR: IrField.isFakeOverride

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrField.kt

@@ -21,6 +21,7 @@ interface IrField :
     val isFinal: Boolean
     val isExternal: Boolean
     val isStatic: Boolean
+    val isFakeOverride: Boolean
 
     var initializer: IrExpressionBody?
 

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrFieldImpl.kt

@@ -43,7 +43,8 @@ class IrFieldImpl(
     override val visibility: Visibility,
     override val isFinal: Boolean,
     override val isExternal: Boolean,
-    override val isStatic: Boolean
+    override val isStatic: Boolean,
+    override val isFakeOverride: Boolean
 ) : IrDeclarationBase(startOffset, endOffset, origin),
     IrField {
 
@@ -60,7 +61,8 @@ class IrFieldImpl(
                 symbol.descriptor.name, type, visibility,
                 isFinal = !symbol.descriptor.isVar,
                 isExternal = symbol.descriptor.isEffectivelyExternal(),
-                isStatic = symbol.descriptor.dispatchReceiverParameter == null
+                isStatic = symbol.descriptor.dispatchReceiverParameter == null,
+                isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE
             )
 
     constructor(

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazyField.kt

@@ -34,6 +34,7 @@ class IrLazyField(
     override val isFinal: Boolean,
     override val isExternal: Boolean,
     override val isStatic: Boolean,
+    override val isFakeOverride: Boolean,
     stubGenerator: DeclarationStubGenerator,
     typeTranslator: TypeTranslator
 ) : IrLazyDeclarationBase(startOffset, endOffset, origin, stubGenerator, typeTranslator),
@@ -50,11 +51,12 @@ class IrLazyField(
         startOffset, endOffset, origin, symbol,
         symbol.descriptor.name,
         symbol.descriptor.visibility,
-        !symbol.descriptor.isVar,
-        symbol.descriptor.isEffectivelyExternal(),
-        symbol.descriptor.dispatchReceiverParameter == null,
-        stubGenerator,
-        typeTranslator
+        isFinal = !symbol.descriptor.isVar,
+        isExternal = symbol.descriptor.isEffectivelyExternal(),
+        isStatic = symbol.descriptor.dispatchReceiverParameter == null,
+        isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE,
+        stubGenerator = stubGenerator,
+        typeTranslator = typeTranslator
     )
 
     init {

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt

@@ -243,9 +243,10 @@ open class DeepCopyIrTreeWithSymbols(
             symbolRenamer.getFieldName(declaration.symbol),
             declaration.type.remapType(),
             declaration.visibility,
-            declaration.isFinal,
-            declaration.isExternal,
-            declaration.isStatic
+            isFinal = declaration.isFinal,
+            isExternal = declaration.isExternal,
+            isStatic = declaration.isStatic,
+            isFakeOverride = declaration.isFakeOverride
         ).apply {
             transformAnnotations(declaration)
             declaration.overriddenSymbols.mapTo(overriddenSymbols) {

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/RenderIrElement.kt

@@ -431,7 +431,8 @@ class RenderIrElementVisitor : IrElementVisitor<String, Nothing?> {
         renderFlagsList(
             "final".takeIf { isFinal },
             "external".takeIf { isExternal },
-            "static".takeIf { isStatic }
+            "static".takeIf { isStatic },
+            "fake_override".takeIf { isFakeOverride }
         )
 
     override fun visitClass(declaration: IrClass, data: Nothing?): String =