[FIR2IR] Generate IR declarations in classes in strict order

Order is following:
- declared declarations in declaration (in source) order
- generated declarations in sorted order

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/ClassMemberGenerator.kt

@@ -10,6 +10,8 @@ import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.fir.backend.*
 import org.jetbrains.kotlin.fir.containingClassLookupTag
 import org.jetbrains.kotlin.fir.declarations.*
+import org.jetbrains.kotlin.fir.declarations.comparators.FirCallableDeclarationComparator
+import org.jetbrains.kotlin.fir.declarations.comparators.FirMemberDeclarationComparator
 import org.jetbrains.kotlin.fir.declarations.impl.FirDefaultPropertyGetter
 import org.jetbrains.kotlin.fir.declarations.impl.FirDefaultPropertySetter
 import org.jetbrains.kotlin.fir.declarations.utils.isExpect
@@ -57,8 +59,8 @@ internal class ClassMemberGenerator(
             val allDeclarations = buildList {
                 addAll(klass.declarations)
                 if (session.extensionService.declarationGenerators.isNotEmpty()) {
-                    addAll(klass.generatedMembers(session))
-                    addAll(klass.generatedNestedClassifiers(session))
+                    addAll(klass.generatedMembers(session).sortedWith(FirCallableDeclarationComparator))
+                    addAll(klass.generatedNestedClassifiers(session).sortedWith(FirMemberDeclarationComparator))
                 }
             }
 

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/ir/FirLightTreeJvmIrTextTestGenerated.java

@@ -88,6 +88,12 @@ public class FirLightTreeJvmIrTextTestGenerated extends AbstractFirLightTreeJvmI
             runTest("compiler/testData/ir/irText/classes/companionObject.kt");
         }
 
+        @Test
+        @TestMetadata("declarationOrder.kt")
+        public void testDeclarationOrder() throws Exception {
+            runTest("compiler/testData/ir/irText/classes/declarationOrder.kt");
+        }
+
         @Test
         @TestMetadata("delegatedGenericImplementation.kt")
         public void testDelegatedGenericImplementation() throws Exception {

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/ir/FirPsiJvmIrTextTestGenerated.java

@@ -88,6 +88,12 @@ public class FirPsiJvmIrTextTestGenerated extends AbstractFirPsiJvmIrTextTest {
             runTest("compiler/testData/ir/irText/classes/companionObject.kt");
         }
 
+        @Test
+        @TestMetadata("declarationOrder.kt")
+        public void testDeclarationOrder() throws Exception {
+            runTest("compiler/testData/ir/irText/classes/declarationOrder.kt");
+        }
+
         @Test
         @TestMetadata("delegatedGenericImplementation.kt")
         public void testDelegatedGenericImplementation() throws Exception {

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/extensions/generatedDeclarationsUtils.kt

@@ -6,17 +6,22 @@
 package org.jetbrains.kotlin.fir.extensions
 
 import org.jetbrains.kotlin.fir.FirSession
+import org.jetbrains.kotlin.fir.declarations.FirCallableDeclaration
 import org.jetbrains.kotlin.fir.declarations.FirClass
+import org.jetbrains.kotlin.fir.declarations.FirClassLikeDeclaration
 import org.jetbrains.kotlin.fir.declarations.FirDeclaration
 import org.jetbrains.kotlin.fir.scopes.impl.declaredMemberScope
 import org.jetbrains.kotlin.fir.scopes.processClassifiersByName
+import org.jetbrains.kotlin.fir.symbols.impl.FirClassLikeSymbol
 
-fun FirClass.generatedNestedClassifiers(session: FirSession): List<FirDeclaration> {
+fun FirClass.generatedNestedClassifiers(session: FirSession): List<FirClassLikeDeclaration> {
     val scope = session.declaredMemberScope(this)
-    val result = mutableListOf<FirDeclaration>()
+    val result = mutableListOf<FirClassLikeDeclaration>()
     for (name in scope.getClassifierNames()) {
         scope.processClassifiersByName(name) {
             if (it.fir.origin.generated) {
+                // Plugins can not generate type parameters, so it's safe to cast symbol here
+                require(it is FirClassLikeSymbol<*>) { "Plugins can not generate type parameters, but had $it" }
                 result += it.fir
             }
         }
@@ -24,9 +29,9 @@ fun FirClass.generatedNestedClassifiers(session: FirSession): List<FirDeclaratio
     return result
 }
 
-fun FirClass.generatedMembers(session: FirSession): List<FirDeclaration> {
+fun FirClass.generatedMembers(session: FirSession): List<FirCallableDeclaration> {
     val scope = session.declaredMemberScope(this)
-    val result = mutableListOf<FirDeclaration>()
+    val result = mutableListOf<FirCallableDeclaration>()
     for (name in scope.getCallableNames()) {
         scope.processFunctionsByName(name) {
             if (it.fir.origin.generated) {

compiler/testData/ir/irText/classes/declarationOrder.ir.txt

@@ -0,0 +1,84 @@
+FILE fqName:test fileName:/declarationOrder.kt
+  CLASS CLASS name:A modality:FINAL visibility:public superTypes:[kotlin.Any]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:test.A
+    CONSTRUCTOR visibility:public <> () returnType:test.A [primary]
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in kotlin.Any'
+        INSTANCE_INITIALIZER_CALL classDescriptor='CLASS CLASS name:A modality:FINAL visibility:public superTypes:[kotlin.Any]'
+    CONSTRUCTOR visibility:public <> (x:kotlin.Int) returnType:test.A
+      VALUE_PARAMETER name:x index:0 type:kotlin.Int
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in test.A'
+    FUN name:b visibility:public modality:FINAL <> ($this:test.A) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:test.A
+      BLOCK_BODY
+    FUN name:a visibility:public modality:FINAL <> ($this:test.A) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:test.A
+      BLOCK_BODY
+    PROPERTY name:b visibility:public modality:FINAL [val]
+      FIELD PROPERTY_BACKING_FIELD name:b type:kotlin.Int visibility:private [final]
+        EXPRESSION_BODY
+          CONST Int type=kotlin.Int value=1
+      FUN DEFAULT_PROPERTY_ACCESSOR name:<get-b> visibility:public modality:FINAL <> ($this:test.A) returnType:kotlin.Int
+        correspondingProperty: PROPERTY name:b visibility:public modality:FINAL [val]
+        $this: VALUE_PARAMETER name:<this> type:test.A
+        BLOCK_BODY
+          RETURN type=kotlin.Nothing from='public final fun <get-b> (): kotlin.Int declared in test.A'
+            GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:b type:kotlin.Int visibility:private [final]' type=kotlin.Int origin=null
+              receiver: GET_VAR '<this>: test.A declared in test.A.<get-b>' type=test.A origin=null
+    PROPERTY name:a visibility:public modality:FINAL [val]
+      FIELD PROPERTY_BACKING_FIELD name:a type:kotlin.Int visibility:private [final]
+        EXPRESSION_BODY
+          CONST Int type=kotlin.Int value=2
+      FUN DEFAULT_PROPERTY_ACCESSOR name:<get-a> visibility:public modality:FINAL <> ($this:test.A) returnType:kotlin.Int
+        correspondingProperty: PROPERTY name:a visibility:public modality:FINAL [val]
+        $this: VALUE_PARAMETER name:<this> type:test.A
+        BLOCK_BODY
+          RETURN type=kotlin.Nothing from='public final fun <get-a> (): kotlin.Int declared in test.A'
+            GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:a type:kotlin.Int visibility:private [final]' type=kotlin.Int origin=null
+              receiver: GET_VAR '<this>: test.A declared in test.A.<get-a>' type=test.A origin=null
+    CONSTRUCTOR visibility:public <> (x:kotlin.String) returnType:test.A
+      VALUE_PARAMETER name:x index:0 type:kotlin.String
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in test.A'
+    PROPERTY name:b visibility:public modality:FINAL [val]
+      FUN name:<get-b> visibility:public modality:FINAL <> ($this:test.A, $receiver:kotlin.Int) returnType:kotlin.String
+        correspondingProperty: PROPERTY name:b visibility:public modality:FINAL [val]
+        $this: VALUE_PARAMETER name:<this> type:test.A
+        $receiver: VALUE_PARAMETER name:<this> type:kotlin.Int
+        BLOCK_BODY
+          RETURN type=kotlin.Nothing from='public final fun <get-b> (): kotlin.String declared in test.A'
+            CONST String type=kotlin.String value="b"
+    FUN name:b visibility:public modality:FINAL <> ($this:test.A, $receiver:kotlin.String) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:test.A
+      $receiver: VALUE_PARAMETER name:<this> type:kotlin.String
+      BLOCK_BODY
+    PROPERTY name:a visibility:public modality:FINAL [val]
+      FUN name:<get-a> visibility:public modality:FINAL <> ($this:test.A, $receiver:kotlin.Int) returnType:kotlin.String
+        correspondingProperty: PROPERTY name:a visibility:public modality:FINAL [val]
+        $this: VALUE_PARAMETER name:<this> type:test.A
+        $receiver: VALUE_PARAMETER name:<this> type:kotlin.Int
+        BLOCK_BODY
+          RETURN type=kotlin.Nothing from='public final fun <get-a> (): kotlin.String declared in test.A'
+            CONST String type=kotlin.String value="a"
+    FUN name:a visibility:public modality:FINAL <> ($this:test.A, $receiver:kotlin.String) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:test.A
+      $receiver: VALUE_PARAMETER name:<this> type:kotlin.String
+      BLOCK_BODY
+    CONSTRUCTOR visibility:public <> (x:kotlin.Double) returnType:test.A
+      VALUE_PARAMETER name:x index:0 type:kotlin.Double
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in test.A'
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
+      overridden:
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any?
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
+      overridden:
+        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
+      overridden:
+        public open fun toString (): kotlin.String declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any

compiler/testData/ir/irText/classes/declarationOrder.kt

@@ -0,0 +1,19 @@
+// FIR_IDENTICAL
+// SKIP_KLIB_TEST
+// IGNORE_BACKEND_K1: JS_IR
+//   Ignore reason: there is a js name clash between function `a()` and property `a`
+package test
+
+class A() {
+    constructor(x: Int) : this()
+    fun b() {}
+    fun a() {}
+    val b: Int = 1
+    val a: Int = 2
+    constructor(x: String) : this()
+    val Int.b: String get() = "b"
+    fun String.b() {}
+    val Int.a: String get() = "a"
+    fun String.a() {}
+    constructor(x: Double) : this()
+}

compiler/testData/ir/irText/classes/declarationOrder.kt.txt

@@ -0,0 +1,53 @@
+package test
+
+class A {
+  constructor() /* primary */ {
+    super/*Any*/()
+    /* <init>() */
+
+  }
+
+  constructor(x: Int) {
+    this/*A*/()
+  }
+
+  fun b() {
+  }
+
+  fun a() {
+  }
+
+  val b: Int
+    field = 1
+    get
+
+  val a: Int
+    field = 2
+    get
+
+  constructor(x: String) {
+    this/*A*/()
+  }
+
+  val Int.b: String
+    get(): String {
+      return "b"
+    }
+
+  fun String.b() {
+  }
+
+  val Int.a: String
+    get(): String {
+      return "a"
+    }
+
+  fun String.a() {
+  }
+
+  constructor(x: Double) {
+    this/*A*/()
+  }
+
+}
+

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/ir/ClassicJvmIrTextTestGenerated.java

@@ -88,6 +88,12 @@ public class ClassicJvmIrTextTestGenerated extends AbstractClassicJvmIrTextTest
             runTest("compiler/testData/ir/irText/classes/companionObject.kt");
         }
 
+        @Test
+        @TestMetadata("declarationOrder.kt")
+        public void testDeclarationOrder() throws Exception {
+            runTest("compiler/testData/ir/irText/classes/declarationOrder.kt");
+        }
+
         @Test
         @TestMetadata("delegatedGenericImplementation.kt")
         public void testDelegatedGenericImplementation() throws Exception {

compiler/tests-gen/org/jetbrains/kotlin/klib/KlibIrTextTestCaseGenerated.java

@@ -87,6 +87,11 @@ public class KlibIrTextTestCaseGenerated extends AbstractKlibIrTextTestCase {
             runTest("compiler/testData/ir/irText/classes/companionObject.kt");
         }
 
+        @TestMetadata("declarationOrder.kt")
+        public void testDeclarationOrder() throws Exception {
+            runTest("compiler/testData/ir/irText/classes/declarationOrder.kt");
+        }
+
         @TestMetadata("delegatedGenericImplementation.kt")
         public void testDelegatedGenericImplementation() throws Exception {
             runTest("compiler/testData/ir/irText/classes/delegatedGenericImplementation.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirLightTreeJsIrTextTestGenerated.java

@@ -88,6 +88,12 @@ public class FirLightTreeJsIrTextTestGenerated extends AbstractFirLightTreeJsIrT
             runTest("compiler/testData/ir/irText/classes/companionObject.kt");
         }
 
+        @Test
+        @TestMetadata("declarationOrder.kt")
+        public void testDeclarationOrder() throws Exception {
+            runTest("compiler/testData/ir/irText/classes/declarationOrder.kt");
+        }
+
         @Test
         @TestMetadata("delegatedGenericImplementation.kt")
         public void testDelegatedGenericImplementation() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirPsiJsIrTextTestGenerated.java

@@ -88,6 +88,12 @@ public class FirPsiJsIrTextTestGenerated extends AbstractFirPsiJsIrTextTest {
             runTest("compiler/testData/ir/irText/classes/companionObject.kt");
         }
 
+        @Test
+        @TestMetadata("declarationOrder.kt")
+        public void testDeclarationOrder() throws Exception {
+            runTest("compiler/testData/ir/irText/classes/declarationOrder.kt");
+        }
+
         @Test
         @TestMetadata("delegatedGenericImplementation.kt")
         public void testDelegatedGenericImplementation() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/ClassicJsIrTextTestGenerated.java

@@ -88,6 +88,12 @@ public class ClassicJsIrTextTestGenerated extends AbstractClassicJsIrTextTest {
             runTest("compiler/testData/ir/irText/classes/companionObject.kt");
         }
 
+        @Test
+        @TestMetadata("declarationOrder.kt")
+        public void testDeclarationOrder() throws Exception {
+            runTest("compiler/testData/ir/irText/classes/declarationOrder.kt");
+        }
+
         @Test
         @TestMetadata("delegatedGenericImplementation.kt")
         public void testDelegatedGenericImplementation() throws Exception {

plugins/fir-plugin-prototype/testData/box/serializer.fir.ir.txt

@@ -0,0 +1,221 @@
+FILE fqName:<root> fileName:/serializer.kt
+  CLASS OBJECT name:FirstSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]
+    annotations:
+      CoreSerializer
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.FirstSerializer
+    CONSTRUCTOR visibility:private <> () returnType:<root>.FirstSerializer [primary]
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in kotlin.Any'
+        INSTANCE_INITIALIZER_CALL classDescriptor='CLASS OBJECT name:FirstSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]'
+    FUN name:bFunction visibility:public modality:FINAL <> ($this:<root>.FirstSerializer) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:<root>.FirstSerializer
+      BLOCK_BODY
+    FUN name:aFunction visibility:public modality:FINAL <> ($this:<root>.FirstSerializer) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:<root>.FirstSerializer
+      BLOCK_BODY
+    PROPERTY name:bProp visibility:public modality:FINAL [val]
+      FIELD PROPERTY_BACKING_FIELD name:bProp type:kotlin.Int visibility:private [final]
+        EXPRESSION_BODY
+          CONST Int type=kotlin.Int value=1
+      FUN DEFAULT_PROPERTY_ACCESSOR name:<get-bProp> visibility:public modality:FINAL <> ($this:<root>.FirstSerializer) returnType:kotlin.Int
+        correspondingProperty: PROPERTY name:bProp visibility:public modality:FINAL [val]
+        $this: VALUE_PARAMETER name:<this> type:<root>.FirstSerializer
+        BLOCK_BODY
+          RETURN type=kotlin.Nothing from='public final fun <get-bProp> (): kotlin.Int declared in <root>.FirstSerializer'
+            GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:bProp type:kotlin.Int visibility:private [final]' type=kotlin.Int origin=null
+              receiver: GET_VAR '<this>: <root>.FirstSerializer declared in <root>.FirstSerializer.<get-bProp>' type=<root>.FirstSerializer origin=null
+    PROPERTY name:aProp visibility:public modality:FINAL [val]
+      FIELD PROPERTY_BACKING_FIELD name:aProp type:kotlin.Int visibility:private [final]
+        EXPRESSION_BODY
+          CONST Int type=kotlin.Int value=2
+      FUN DEFAULT_PROPERTY_ACCESSOR name:<get-aProp> visibility:public modality:FINAL <> ($this:<root>.FirstSerializer) returnType:kotlin.Int
+        correspondingProperty: PROPERTY name:aProp visibility:public modality:FINAL [val]
+        $this: VALUE_PARAMETER name:<this> type:<root>.FirstSerializer
+        BLOCK_BODY
+          RETURN type=kotlin.Nothing from='public final fun <get-aProp> (): kotlin.Int declared in <root>.FirstSerializer'
+            GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:aProp type:kotlin.Int visibility:private [final]' type=kotlin.Int origin=null
+              receiver: GET_VAR '<this>: <root>.FirstSerializer declared in <root>.FirstSerializer.<get-aProp>' type=<root>.FirstSerializer origin=null
+    FUN GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:serializeA visibility:public modality:FINAL <> ($this:<root>.FirstSerializer, x:<root>.A) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:<root>.FirstSerializer
+      VALUE_PARAMETER GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:x index:0 type:<root>.A
+      BLOCK_BODY
+    FUN GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:serializeB visibility:public modality:FINAL <> ($this:<root>.FirstSerializer, x:<root>.B) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:<root>.FirstSerializer
+      VALUE_PARAMETER GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:x index:0 type:<root>.B
+      BLOCK_BODY
+    FUN GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:serializeC visibility:public modality:FINAL <> ($this:<root>.FirstSerializer, x:<root>.C) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:<root>.FirstSerializer
+      VALUE_PARAMETER GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:x index:0 type:<root>.C
+      BLOCK_BODY
+    FUN GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:serializeD visibility:public modality:FINAL <> ($this:<root>.FirstSerializer, x:<root>.D) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:<root>.FirstSerializer
+      VALUE_PARAMETER GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:x index:0 type:<root>.D
+      BLOCK_BODY
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
+      overridden:
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any?
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
+      overridden:
+        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
+      overridden:
+        public open fun toString (): kotlin.String declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+  CLASS OBJECT name:SecondSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]
+    annotations:
+      CoreSerializer
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.SecondSerializer
+    CONSTRUCTOR visibility:private <> () returnType:<root>.SecondSerializer [primary]
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in kotlin.Any'
+        INSTANCE_INITIALIZER_CALL classDescriptor='CLASS OBJECT name:SecondSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]'
+    FUN GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:serializeA visibility:public modality:FINAL <> ($this:<root>.SecondSerializer, x:<root>.A) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:<root>.SecondSerializer
+      VALUE_PARAMETER GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:x index:0 type:<root>.A
+      BLOCK_BODY
+    FUN GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:serializeB visibility:public modality:FINAL <> ($this:<root>.SecondSerializer, x:<root>.B) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:<root>.SecondSerializer
+      VALUE_PARAMETER GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:x index:0 type:<root>.B
+      BLOCK_BODY
+    FUN GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:serializeC visibility:public modality:FINAL <> ($this:<root>.SecondSerializer, x:<root>.C) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:<root>.SecondSerializer
+      VALUE_PARAMETER GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:x index:0 type:<root>.C
+      BLOCK_BODY
+    FUN GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:serializeD visibility:public modality:FINAL <> ($this:<root>.SecondSerializer, x:<root>.D) returnType:kotlin.Unit
+      $this: VALUE_PARAMETER name:<this> type:<root>.SecondSerializer
+      VALUE_PARAMETER GENERATED[org.jetbrains.kotlin.fir.plugin.generators.MembersOfSerializerGenerator.Key] name:x index:0 type:<root>.D
+      BLOCK_BODY
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
+      overridden:
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any?
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
+      overridden:
+        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
+      overridden:
+        public open fun toString (): kotlin.String declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+  CLASS CLASS name:D modality:FINAL visibility:public superTypes:[kotlin.Any]
+    annotations:
+      MySerializable
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.D
+    CONSTRUCTOR visibility:public <> () returnType:<root>.D [primary]
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in kotlin.Any'
+        INSTANCE_INITIALIZER_CALL classDescriptor='CLASS CLASS name:D modality:FINAL visibility:public superTypes:[kotlin.Any]'
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
+      overridden:
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any?
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
+      overridden:
+        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
+      overridden:
+        public open fun toString (): kotlin.String declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+  CLASS CLASS name:C modality:FINAL visibility:public superTypes:[kotlin.Any]
+    annotations:
+      MySerializable
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.C
+    CONSTRUCTOR visibility:public <> () returnType:<root>.C [primary]
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in kotlin.Any'
+        INSTANCE_INITIALIZER_CALL classDescriptor='CLASS CLASS name:C modality:FINAL visibility:public superTypes:[kotlin.Any]'
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
+      overridden:
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any?
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
+      overridden:
+        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
+      overridden:
+        public open fun toString (): kotlin.String declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+  CLASS CLASS name:B modality:FINAL visibility:public superTypes:[kotlin.Any]
+    annotations:
+      MySerializable
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.B
+    CONSTRUCTOR visibility:public <> () returnType:<root>.B [primary]
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in kotlin.Any'
+        INSTANCE_INITIALIZER_CALL classDescriptor='CLASS CLASS name:B modality:FINAL visibility:public superTypes:[kotlin.Any]'
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
+      overridden:
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any?
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
+      overridden:
+        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
+      overridden:
+        public open fun toString (): kotlin.String declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+  CLASS CLASS name:A modality:FINAL visibility:public superTypes:[kotlin.Any]
+    annotations:
+      MySerializable
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.A
+    CONSTRUCTOR visibility:public <> () returnType:<root>.A [primary]
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in kotlin.Any'
+        INSTANCE_INITIALIZER_CALL classDescriptor='CLASS CLASS name:A modality:FINAL visibility:public superTypes:[kotlin.Any]'
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
+      overridden:
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any?
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
+      overridden:
+        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
+      overridden:
+        public open fun toString (): kotlin.String declared in kotlin.Any
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any
+  FUN name:testFirstSerializer visibility:public modality:FINAL <> () returnType:kotlin.Unit
+    BLOCK_BODY
+      CALL 'public final fun serializeA (x: <root>.A): kotlin.Unit declared in <root>.FirstSerializer' type=kotlin.Unit origin=null
+        $this: GET_OBJECT 'CLASS OBJECT name:FirstSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.FirstSerializer
+        x: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.A' type=<root>.A origin=null
+      CALL 'public final fun serializeB (x: <root>.B): kotlin.Unit declared in <root>.FirstSerializer' type=kotlin.Unit origin=null
+        $this: GET_OBJECT 'CLASS OBJECT name:FirstSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.FirstSerializer
+        x: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.B' type=<root>.B origin=null
+      CALL 'public final fun serializeC (x: <root>.C): kotlin.Unit declared in <root>.FirstSerializer' type=kotlin.Unit origin=null
+        $this: GET_OBJECT 'CLASS OBJECT name:FirstSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.FirstSerializer
+        x: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.C' type=<root>.C origin=null
+      CALL 'public final fun serializeD (x: <root>.D): kotlin.Unit declared in <root>.FirstSerializer' type=kotlin.Unit origin=null
+        $this: GET_OBJECT 'CLASS OBJECT name:FirstSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.FirstSerializer
+        x: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.D' type=<root>.D origin=null
+  FUN name:testSecondSerializer visibility:public modality:FINAL <> () returnType:kotlin.Unit
+    BLOCK_BODY
+      CALL 'public final fun serializeA (x: <root>.A): kotlin.Unit declared in <root>.SecondSerializer' type=kotlin.Unit origin=null
+        $this: GET_OBJECT 'CLASS OBJECT name:SecondSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.SecondSerializer
+        x: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.A' type=<root>.A origin=null
+      CALL 'public final fun serializeB (x: <root>.B): kotlin.Unit declared in <root>.SecondSerializer' type=kotlin.Unit origin=null
+        $this: GET_OBJECT 'CLASS OBJECT name:SecondSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.SecondSerializer
+        x: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.B' type=<root>.B origin=null
+      CALL 'public final fun serializeC (x: <root>.C): kotlin.Unit declared in <root>.SecondSerializer' type=kotlin.Unit origin=null
+        $this: GET_OBJECT 'CLASS OBJECT name:SecondSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.SecondSerializer
+        x: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.C' type=<root>.C origin=null
+      CALL 'public final fun serializeD (x: <root>.D): kotlin.Unit declared in <root>.SecondSerializer' type=kotlin.Unit origin=null
+        $this: GET_OBJECT 'CLASS OBJECT name:SecondSerializer modality:FINAL visibility:public superTypes:[kotlin.Any]' type=<root>.SecondSerializer
+        x: CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in <root>.D' type=<root>.D origin=null
+  FUN name:box visibility:public modality:FINAL <> () returnType:kotlin.String
+    BLOCK_BODY
+      CALL 'public final fun testFirstSerializer (): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
+      CALL 'public final fun testSecondSerializer (): kotlin.Unit declared in <root>' type=kotlin.Unit origin=null
+      RETURN type=kotlin.Nothing from='public final fun box (): kotlin.String declared in <root>'
+        CONST String type=kotlin.String value="OK"

plugins/fir-plugin-prototype/testData/box/serializer.fir.txt

@@ -4,6 +4,18 @@ FILE: serializer.kt
             super<R|kotlin/Any|>()
         }
 
+        public final fun bFunction(): R|kotlin/Unit| {
+        }
+
+        public final fun aFunction(): R|kotlin/Unit| {
+        }
+
+        public final val bProp: R|kotlin/Int| = Int(1)
+            public get(): R|kotlin/Int|
+
+        public final val aProp: R|kotlin/Int| = Int(2)
+            public get(): R|kotlin/Int|
+
         public final fun serializeA(x: R|A|): R|kotlin/Unit| {
         }
 
@@ -35,14 +47,8 @@ FILE: serializer.kt
         }
 
     }
-    @R|org/jetbrains/kotlin/fir/plugin/MySerializable|() public final class A : R|kotlin/Any| {
-        public constructor(): R|A| {
-            super<R|kotlin/Any|>()
-        }
-
-    }
-    @R|org/jetbrains/kotlin/fir/plugin/MySerializable|() public final class B : R|kotlin/Any| {
-        public constructor(): R|B| {
+    @R|org/jetbrains/kotlin/fir/plugin/MySerializable|() public final class D : R|kotlin/Any| {
+        public constructor(): R|D| {
             super<R|kotlin/Any|>()
         }
 
@@ -53,8 +59,14 @@ FILE: serializer.kt
         }
 
     }
-    @R|org/jetbrains/kotlin/fir/plugin/MySerializable|() public final class D : R|kotlin/Any| {
-        public constructor(): R|D| {
+    @R|org/jetbrains/kotlin/fir/plugin/MySerializable|() public final class B : R|kotlin/Any| {
+        public constructor(): R|B| {
+            super<R|kotlin/Any|>()
+        }
+
+    }
+    @R|org/jetbrains/kotlin/fir/plugin/MySerializable|() public final class A : R|kotlin/Any| {
+        public constructor(): R|A| {
             super<R|kotlin/Any|>()
         }
 

plugins/fir-plugin-prototype/testData/box/serializer.kt

@@ -1,23 +1,31 @@
+// DUMP_IR
+
 import org.jetbrains.kotlin.fir.plugin.CoreSerializer
 import org.jetbrains.kotlin.fir.plugin.MySerializable
 
 @CoreSerializer
-object FirstSerializer
+object FirstSerializer {
+    fun bFunction() {}
+    fun aFunction() {}
+
+    val bProp = 1
+    val aProp = 2
+}
 
 @CoreSerializer
 object SecondSerializer
 
 @MySerializable
-class A
-
-@MySerializable
-class B
+class D
 
 @MySerializable
 class C
 
 @MySerializable
-class D
+class B
+
+@MySerializable
+class A
 
 fun testFirstSerializer() {
     FirstSerializer.serializeA(A())