K2 Scripting, Fir2Ir: allow out of order supertypes declaration

fix script declarations registration logic in Fir2Ir to allow
supertypes of a class to be defined later than the class itself.

#KT-64534 fixed

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrConverter.kt

@@ -528,10 +528,12 @@ class Fir2IrConverter(
                 addDeclarationToParentIfNeeded(irScript)
                 declarationStorage.withScope(irScript.symbol) {
                     irScript.parent = parent
+                    for (scriptDeclaration in declaration.declarations.filterIsInstance<FirRegularClass>()) {
+                        registerClassAndNestedClasses(scriptDeclaration, irScript)
+                    }
                     for (scriptDeclaration in declaration.declarations) {
                         when (scriptDeclaration) {
                             is FirRegularClass -> {
-                                registerClassAndNestedClasses(scriptDeclaration, irScript)
                                 processClassAndNestedClassHeaders(scriptDeclaration)
                             }
                             is FirTypeAlias -> classifierStorage.createAndCacheIrTypeAlias(scriptDeclaration, irScript)

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirPsiBlackBoxCodegenTestGenerated.java

@@ -54575,6 +54575,12 @@ public class FirPsiBlackBoxCodegenTestGenerated extends AbstractFirPsiBlackBoxCo
       runTest("compiler/testData/codegen/box/script/localCaptureTestsK2.kt");
     }
 
+    @Test
+    @TestMetadata("outOuOrderDecls.kt")
+    public void testOutOuOrderDecls() {
+      runTest("compiler/testData/codegen/box/script/outOuOrderDecls.kt");
+    }
+
     @Test
     @TestMetadata("scripInstance.kt")
     public void testScripInstance() {

compiler/testData/codegen/box/script/outOuOrderDecls.jvm_abi.txt

@@ -0,0 +1,24 @@
+MODULE main
+	CLASS Script.class
+		CLASS METADATA
+			K1
+				<init>([Ljava/lang/String;)V
+			K2
+				---
+			Property: class.metadata.superTypes
+				K1
+					[kotlin/script/templates/standard/ScriptTemplateWithArgs]
+				K2
+					[]
+			Property: class.metadata.contextReceiverTypes
+				K1
+					[]
+				K2
+					[kotlin/script/templates/standard/ScriptTemplateWithArgs]
+	CLASS Script$A.class
+		CLASS METADATA
+			Property: class.metadata.superTypes
+				K1
+					[Script.B, Script.C]
+				K2
+					[B, C]

compiler/testData/codegen/box/script/outOuOrderDecls.kt

@@ -0,0 +1,14 @@
+// TARGET_BACKEND: JVM
+// IGNORE_LIGHT_ANALYSIS
+// JVM_ABI_K1_K2_DIFF: KT-63963, KT-63964, KT-63960
+// FILE: test.kt
+
+fun box(): String = "OK"
+
+// FILE: script.kts
+
+class A : B, C {}
+
+interface B
+
+interface C

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

@@ -53873,6 +53873,12 @@ public class JvmAbiConsistencyTestBoxGenerated extends AbstractJvmAbiConsistency
       runTest("compiler/testData/codegen/box/script/localCaptureTestsK2.kt");
     }
 
+    @Test
+    @TestMetadata("outOuOrderDecls.kt")
+    public void testOutOuOrderDecls() {
+      runTest("compiler/testData/codegen/box/script/outOuOrderDecls.kt");
+    }
+
     @Test
     @TestMetadata("scripInstance.kt")
     public void testScripInstance() {

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java

@@ -50687,6 +50687,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
       runTest("compiler/testData/codegen/box/script/localCaptureTestsK2.kt");
     }
 
+    @Test
+    @TestMetadata("outOuOrderDecls.kt")
+    public void testOutOuOrderDecls() {
+      runTest("compiler/testData/codegen/box/script/outOuOrderDecls.kt");
+    }
+
     @Test
     @TestMetadata("scripInstance.kt")
     public void testScripInstance() {

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java

@@ -53873,6 +53873,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
       runTest("compiler/testData/codegen/box/script/localCaptureTestsK2.kt");
     }
 
+    @Test
+    @TestMetadata("outOuOrderDecls.kt")
+    public void testOutOuOrderDecls() {
+      runTest("compiler/testData/codegen/box/script/outOuOrderDecls.kt");
+    }
+
     @Test
     @TestMetadata("scripInstance.kt")
     public void testScripInstance() {

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenWithIrInlinerTestGenerated.java

@@ -53873,6 +53873,12 @@ public class IrBlackBoxCodegenWithIrInlinerTestGenerated extends AbstractIrBlack
       runTest("compiler/testData/codegen/box/script/localCaptureTestsK2.kt");
     }
 
+    @Test
+    @TestMetadata("outOuOrderDecls.kt")
+    public void testOutOuOrderDecls() {
+      runTest("compiler/testData/codegen/box/script/outOuOrderDecls.kt");
+    }
+
     @Test
     @TestMetadata("scripInstance.kt")
     public void testScripInstance() {

compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -43545,6 +43545,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
       runTest("compiler/testData/codegen/box/script/localCaptureTests.kt");
     }
 
+    @TestMetadata("outOuOrderDecls.kt")
+    public void testOutOuOrderDecls() {
+      runTest("compiler/testData/codegen/box/script/outOuOrderDecls.kt");
+    }
+
     @TestMetadata("scripInstance.kt")
     public void testScripInstance() {
       runTest("compiler/testData/codegen/box/script/scripInstance.kt");