IR: IrSimpleFunction.isFakeOverride

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

@@ -28,6 +28,7 @@ interface IrSimpleFunction :
     val modality: Modality
     val isTailrec: Boolean
     val isSuspend: Boolean
+    val isFakeOverride: Boolean
 
     @Deprecated("Use correspondingPropertySymbol")
     var correspondingProperty: IrProperty?

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

@@ -32,7 +32,8 @@ class IrFunctionImpl(
     isExternal: Boolean,
     override val isTailrec: Boolean,
     override val isSuspend: Boolean,
-    isExpect: Boolean
+    isExpect: Boolean,
+    override val isFakeOverride: Boolean
 ) :
     IrFunctionBase(startOffset, endOffset, origin, name, visibility, isInline, isExternal, isExpect, returnType),
     IrSimpleFunction {
@@ -55,7 +56,8 @@ class IrFunctionImpl(
         isExternal = symbol.descriptor.isExternal,
         isTailrec = symbol.descriptor.isTailrec,
         isSuspend = symbol.descriptor.isSuspend,
-        isExpect = symbol.descriptor.isExpect
+        isExpect = symbol.descriptor.isExpect,
+        isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE
     )
 
     override val descriptor: FunctionDescriptor = symbol.descriptor

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

@@ -34,6 +34,7 @@ class IrLazyFunction(
     override val isTailrec: Boolean,
     override val isSuspend: Boolean,
     isExpect: Boolean,
+    override val isFakeOverride: Boolean,
     stubGenerator: DeclarationStubGenerator,
     typeTranslator: TypeTranslator
 ) :
@@ -57,6 +58,7 @@ class IrLazyFunction(
         isTailrec = symbol.descriptor.isTailrec,
         isSuspend = symbol.descriptor.isSuspend,
         isExpect = symbol.descriptor.isExpect,
+        isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE,
         stubGenerator = stubGenerator,
         typeTranslator = TypeTranslator
     )

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

@@ -169,7 +169,8 @@ open class DeepCopyIrTreeWithSymbols(
             isExternal = declaration.isExternal,
             isTailrec = declaration.isTailrec,
             isSuspend = declaration.isSuspend,
-            isExpect = declaration.isExpect
+            isExpect = declaration.isExpect,
+            isFakeOverride = declaration.isFakeOverride
         ).apply {
             declaration.overriddenSymbols.mapTo(overriddenSymbols) {
                 symbolRemapper.getReferencedFunction(it) as IrSimpleFunctionSymbol

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

@@ -371,7 +371,8 @@ class RenderIrElementVisitor : IrElementVisitor<String, Nothing?> {
             "inline".takeIf { isInline },
             "external".takeIf { isExternal },
             "suspend".takeIf { isSuspend },
-            "expect".takeIf { isExpect }
+            "expect".takeIf { isExpect },
+            "fake_override".takeIf { isFakeOverride }
         )
 
     private fun IrFunction.renderTypeParameters(): String =