Native: fix using nested expect enum entry in a default argument

^KT-51156 Fixed

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/ModuleIndex.kt

@@ -31,10 +31,16 @@ class ModuleIndex(val module: IrModuleFragment) {
      */
     val properties: Map<PropertyDescriptor, IrProperty>
 
+    /**
+     * Contains all enum entries declared in [module]
+     */
+    val enumEntries: Map<ClassDescriptor, IrEnumEntry>
+
     init {
         classes = mutableMapOf()
         functions = mutableMapOf()
         properties = mutableMapOf()
+        enumEntries = mutableMapOf()
 
         module.acceptVoid(object : IrElementVisitorVoid {
             override fun visitElement(element: IrElement) {
@@ -56,6 +62,11 @@ class ModuleIndex(val module: IrModuleFragment) {
                 super.visitProperty(declaration)
                 properties[declaration.descriptor] = declaration
             }
+
+            override fun visitEnumEntry(declaration: IrEnumEntry) {
+                super.visitEnumEntry(declaration)
+                enumEntries[declaration.descriptor] = declaration
+            }
         })
     }
 }

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/ExpectDeclarationsRemoving.kt

@@ -16,10 +16,7 @@ import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.impl.IrExpressionBodyImpl
 import org.jetbrains.kotlin.ir.symbols.*
-import org.jetbrains.kotlin.ir.util.DeepCopyIrTreeWithSymbols
-import org.jetbrains.kotlin.ir.util.DeepCopySymbolRemapper
-import org.jetbrains.kotlin.ir.util.DeepCopyTypeRemapper
-import org.jetbrains.kotlin.ir.util.patchDeclarationParents
+import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
 import org.jetbrains.kotlin.ir.visitors.acceptChildrenVoid
 import org.jetbrains.kotlin.ir.visitors.acceptVoid
@@ -101,6 +98,9 @@ internal class ExpectToActualDefaultValueCopier(private val irModule: IrModuleFr
     private fun IrClass.findActualForExpected(): IrClass =
             moduleIndex.classes[descriptor.findActualForExpect()]!!
 
+    private fun IrEnumEntry.findActualForExpected(): IrEnumEntry =
+            moduleIndex.enumEntries[descriptor.findActualForExpect()]!!
+
     private inline fun <reified T : MemberDescriptor> T.findActualForExpect(): T {
         if (!this.isExpect) error(this)
         return (findCompatibleActualsForExpected(module).singleOrNull() ?: error(this)) as T
@@ -156,6 +156,12 @@ internal class ExpectToActualDefaultValueCopier(private val irModule: IrModuleFr
                     else
                         super.getReferencedProperty(symbol)
 
+            override fun getReferencedEnumEntry(symbol: IrEnumEntrySymbol): IrEnumEntrySymbol =
+                    if (symbol.descriptor.isExpect)
+                        symbol.owner.findActualForExpected().symbol
+                    else
+                        super.getReferencedEnumEntry(symbol)
+
             override fun getReferencedValue(symbol: IrValueSymbol) =
                     remapExpectValue(symbol)?.symbol ?: super.getReferencedValue(symbol)
         }