[FIR2IR] Extract logic of IR declarations generation into separate component. Part 4

Move caching of created IrAnonymousInitializer back to Fir2IrDeclarationStorage
Fix all call-sites

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

@@ -486,7 +486,7 @@ class Fir2IrConverter(
                 classifierStorage.getIrEnumEntry(declaration, parent as IrClass)
             }
             is FirAnonymousInitializer -> {
-                callablesGenerator.createIrAnonymousInitializer(declaration, parent as IrClass)
+                declarationStorage.getOrCreateIrAnonymousInitializer(declaration, parent as IrClass)
             }
             is FirTypeAlias -> {
                 // DO NOTHING

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrDeclarationStorage.kt

@@ -48,6 +48,7 @@ import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.jvm.JvmClassName
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerAbiStability
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerSource
+import org.jetbrains.kotlin.utils.addToStdlib.getOrPut
 import org.jetbrains.kotlin.utils.threadLocal
 import java.util.concurrent.ConcurrentHashMap
 
@@ -475,8 +476,14 @@ class Fir2IrDeclarationStorage(
         return irFunction
     }
 
-    fun getCachedIrAnonymousInitializer(anonymousInitializer: FirAnonymousInitializer): IrAnonymousInitializer? =
-        initializerCache[anonymousInitializer]
+    fun getOrCreateIrAnonymousInitializer(
+        anonymousInitializer: FirAnonymousInitializer,
+        containingIrClass: IrClass,
+    ): IrAnonymousInitializer {
+        return initializerCache.computeIfAbsent(anonymousInitializer) {
+            callablesGenerator.createIrAnonymousInitializer(anonymousInitializer, containingIrClass)
+        }
+    }
 
     @OptIn(IrSymbolInternals::class)
     fun getCachedIrConstructor(

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

@@ -387,7 +387,7 @@ class Fir2IrVisitor(
         anonymousInitializer: FirAnonymousInitializer,
         data: Any?
     ): IrElement = whileAnalysing(session, anonymousInitializer) {
-        val irAnonymousInitializer = declarationStorage.getCachedIrAnonymousInitializer(anonymousInitializer)!!
+        val irAnonymousInitializer = declarationStorage.getOrCreateIrAnonymousInitializer(anonymousInitializer, conversionScope.lastClass()!!)
         declarationStorage.enterScope(irAnonymousInitializer.symbol)
         irAnonymousInitializer.body = convertToIrBlockBody(anonymousInitializer.body!!)
         declarationStorage.leaveScope(irAnonymousInitializer.symbol)

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/Fir2IrCallableDeclarationsGenerator.kt

@@ -367,7 +367,6 @@ class Fir2IrCallableDeclarationsGenerator(val components: Fir2IrComponents) : Fi
                 irParent.descriptor
             ).apply {
                 this.parent = irParent
-                initializerCache[anonymousInitializer] = this
             }
         }
     }