FIR2IR: use enum constructor call for enum entries

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrVisitor.kt

@@ -404,16 +404,25 @@ class Fir2IrVisitor(
         }
     }
 
-    private fun FirDelegatedConstructorCall.toIrDelegatingConstructorCall(): IrDelegatingConstructorCall? {
+    private fun FirDelegatedConstructorCall.toIrDelegatingConstructorCall(): IrCallWithIndexedArgumentsBase? {
         val constructedIrType = constructedTypeRef.toIrType(this@Fir2IrVisitor.session, declarationStorage)
         val constructorSymbol = (this.calleeReference as? FirResolvedNamedReference)?.resolvedSymbol as? FirConstructorSymbol
             ?: return null
         return convertWithOffsets { startOffset, endOffset ->
-            IrDelegatingConstructorCallImpl(
-                startOffset, endOffset,
-                constructedIrType,
-                declarationStorage.getIrFunctionSymbol(constructorSymbol) as IrConstructorSymbol
-            ).apply {
+            val irConstructorSymbol = declarationStorage.getIrFunctionSymbol(constructorSymbol) as IrConstructorSymbol
+            if (constructorSymbol.fir.isFromEnumClass) {
+                IrEnumConstructorCallImpl(
+                    startOffset, endOffset,
+                    constructedIrType,
+                    irConstructorSymbol
+                )
+            } else {
+                IrDelegatingConstructorCallImpl(
+                    startOffset, endOffset,
+                    constructedIrType,
+                    irConstructorSymbol
+                )
+            }.apply {
                 for ((index, argument) in arguments.withIndex()) {
                     val argumentExpression = argument.toIrExpression()
                     putValueArgument(index, argumentExpression)

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/ResolverParts.kt

@@ -421,7 +421,7 @@ internal object CheckVisibility : CheckerStage() {
             }
             Visibilities.PRIVATE, Visibilities.PRIVATE_TO_THIS -> {
                 if (declaration.session == callInfo.session) {
-                    if (ownerId == null || declaration is FirConstructor && declaration.status.isFromSealedClass) {
+                    if (ownerId == null || declaration is FirConstructor && declaration.isFromSealedClass) {
                         // Top-level: visible in file
                         candidateFile == useSiteFile
                     } else {

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/FirDeclarationUtil.kt

@@ -39,6 +39,8 @@ inline val FirMemberDeclaration.isExternal: Boolean get() = status.isExternal
 inline val FirMemberDeclaration.isSuspend: Boolean get() = status.isSuspend
 inline val FirMemberDeclaration.isConst: Boolean get() = status.isConst
 inline val FirMemberDeclaration.isLateInit: Boolean get() = status.isLateInit
+inline val FirMemberDeclaration.isFromSealedClass: Boolean get() = status.isFromSealedClass
+inline val FirMemberDeclaration.isFromEnumClass: Boolean get() = status.isFromEnumClass
 
 inline val FirPropertyAccessor.modality get() = status.modality
 inline val FirPropertyAccessor.visibility get() = status.visibility