FIR: add temporary access to Enum.getDeclaringClass (see KT-49653)

compiler/testData/ir/irText/expressions/enumEntryAsReceiver.fir.ir.txt

@@ -84,6 +84,10 @@ FILE fqName:<root> fileName:/enumEntryAsReceiver.kt
             overridden:
               public final fun <get-ordinal> (): kotlin.Int [fake_override] declared in <root>.X
             $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
+        FUN FAKE_OVERRIDE name:getDeclaringClass visibility:public modality:FINAL <> ($this:kotlin.Enum<E of kotlin.Enum>) returnType:@[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.X?>? [fake_override]
+          overridden:
+            public final fun getDeclaringClass (): @[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.X?>? [fake_override] declared in <root>.X
+          $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
     PROPERTY name:value visibility:public modality:ABSTRACT [val]
       FUN DEFAULT_PROPERTY_ACCESSOR name:<get-value> visibility:public modality:ABSTRACT <> ($this:<root>.X) returnType:kotlin.Function0<kotlin.String>
         correspondingProperty: PROPERTY name:value visibility:public modality:ABSTRACT [val]
@@ -131,6 +135,10 @@ FILE fqName:<root> fileName:/enumEntryAsReceiver.kt
         overridden:
           public final fun <get-ordinal> (): kotlin.Int declared in kotlin.Enum
         $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
+    FUN FAKE_OVERRIDE name:getDeclaringClass visibility:public modality:FINAL <> ($this:kotlin.Enum<E of kotlin.Enum>) returnType:@[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.X?>? [fake_override]
+      overridden:
+        public final fun getDeclaringClass (): @[FlexibleNullability] java.lang.Class<@[FlexibleNullability] E of kotlin.Enum?>? declared in kotlin.Enum
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
   FUN name:box visibility:public modality:FINAL <> () returnType:kotlin.String
     BLOCK_BODY
       RETURN type=kotlin.Nothing from='public final fun box (): kotlin.String declared in <root>'

compiler/testData/ir/irText/expressions/enumEntryReferenceFromEnumEntryClass.fir.ir.txt

@@ -147,6 +147,10 @@ FILE fqName:<root> fileName:/enumEntryReferenceFromEnumEntryClass.kt
             overridden:
               public final fun <get-ordinal> (): kotlin.Int [fake_override] declared in <root>.MyEnum
             $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
+        FUN FAKE_OVERRIDE name:getDeclaringClass visibility:public modality:FINAL <> ($this:kotlin.Enum<E of kotlin.Enum>) returnType:@[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.MyEnum?>? [fake_override]
+          overridden:
+            public final fun getDeclaringClass (): @[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.MyEnum?>? [fake_override] declared in <root>.MyEnum
+          $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
     FUN ENUM_CLASS_SPECIAL_MEMBER name:values visibility:public modality:FINAL <> () returnType:kotlin.Array<<root>.MyEnum>
       SYNTHETIC_BODY kind=ENUM_VALUES
     FUN ENUM_CLASS_SPECIAL_MEMBER name:valueOf visibility:public modality:FINAL <> (value:kotlin.String) returnType:<root>.MyEnum
@@ -190,3 +194,7 @@ FILE fqName:<root> fileName:/enumEntryReferenceFromEnumEntryClass.kt
         overridden:
           public final fun <get-ordinal> (): kotlin.Int declared in kotlin.Enum
         $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
+    FUN FAKE_OVERRIDE name:getDeclaringClass visibility:public modality:FINAL <> ($this:kotlin.Enum<E of kotlin.Enum>) returnType:@[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.MyEnum?>? [fake_override]
+      overridden:
+        public final fun getDeclaringClass (): @[FlexibleNullability] java.lang.Class<@[FlexibleNullability] E of kotlin.Enum?>? declared in kotlin.Enum
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>

compiler/testData/ir/irText/expressions/exhaustiveWhenElseBranch.fir.ir.txt

@@ -52,6 +52,10 @@ FILE fqName:<root> fileName:/exhaustiveWhenElseBranch.kt
         overridden:
           public final fun <get-ordinal> (): kotlin.Int declared in kotlin.Enum
         $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
+    FUN FAKE_OVERRIDE name:getDeclaringClass visibility:public modality:FINAL <> ($this:kotlin.Enum<E of kotlin.Enum>) returnType:@[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.A?>? [fake_override]
+      overridden:
+        public final fun getDeclaringClass (): @[FlexibleNullability] java.lang.Class<@[FlexibleNullability] E of kotlin.Enum?>? declared in kotlin.Enum
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
   FUN name:testVariableAssignment_throws visibility:public modality:FINAL <> (a:<root>.A) returnType:kotlin.Unit
     VALUE_PARAMETER name:a index:0 type:<root>.A
     BLOCK_BODY

compiler/testData/ir/irText/expressions/objectAsCallable.fir.ir.txt

@@ -71,6 +71,10 @@ FILE fqName:<root> fileName:/objectAsCallable.kt
         overridden:
           public final fun <get-ordinal> (): kotlin.Int declared in kotlin.Enum
         $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
+    FUN FAKE_OVERRIDE name:getDeclaringClass visibility:public modality:FINAL <> ($this:kotlin.Enum<E of kotlin.Enum>) returnType:@[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.En?>? [fake_override]
+      overridden:
+        public final fun getDeclaringClass (): @[FlexibleNullability] java.lang.Class<@[FlexibleNullability] E of kotlin.Enum?>? declared in kotlin.Enum
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
   FUN name:invoke visibility:public modality:FINAL <> ($receiver:<root>.A, i:kotlin.Int) returnType:kotlin.Int [operator]
     $receiver: VALUE_PARAMETER name:<this> type:<root>.A
     VALUE_PARAMETER name:i index:0 type:kotlin.Int

compiler/testData/ir/irText/expressions/temporaryInEnumEntryInitializer.fir.ir.txt

@@ -86,3 +86,7 @@ FILE fqName:<root> fileName:/temporaryInEnumEntryInitializer.kt
         overridden:
           public final fun <get-ordinal> (): kotlin.Int declared in kotlin.Enum
         $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
+    FUN FAKE_OVERRIDE name:getDeclaringClass visibility:public modality:FINAL <> ($this:kotlin.Enum<E of kotlin.Enum>) returnType:@[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.En?>? [fake_override]
+      overridden:
+        public final fun getDeclaringClass (): @[FlexibleNullability] java.lang.Class<@[FlexibleNullability] E of kotlin.Enum?>? declared in kotlin.Enum
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>

compiler/testData/ir/irText/expressions/values.fir.ir.txt

@@ -52,6 +52,10 @@ FILE fqName:<root> fileName:/values.kt
         overridden:
           public final fun <get-ordinal> (): kotlin.Int declared in kotlin.Enum
         $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
+    FUN FAKE_OVERRIDE name:getDeclaringClass visibility:public modality:FINAL <> ($this:kotlin.Enum<E of kotlin.Enum>) returnType:@[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.Enum?>? [fake_override]
+      overridden:
+        public final fun getDeclaringClass (): @[FlexibleNullability] java.lang.Class<@[FlexibleNullability] E of kotlin.Enum?>? declared in kotlin.Enum
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
   CLASS OBJECT name:A modality:FINAL visibility:public superTypes:[kotlin.Any]
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.A
     CONSTRUCTOR visibility:private <> () returnType:<root>.A [primary]

compiler/testData/ir/irText/expressions/whenSmartCastToEnum.fir.ir.txt

@@ -58,6 +58,10 @@ FILE fqName:<root> fileName:/whenSmartCastToEnum.kt
         overridden:
           public final fun <get-ordinal> (): kotlin.Int declared in kotlin.Enum
         $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
+    FUN FAKE_OVERRIDE name:getDeclaringClass visibility:public modality:FINAL <> ($this:kotlin.Enum<E of kotlin.Enum>) returnType:@[FlexibleNullability] java.lang.Class<@[FlexibleNullability] <root>.En?>? [fake_override]
+      overridden:
+        public final fun getDeclaringClass (): @[FlexibleNullability] java.lang.Class<@[FlexibleNullability] E of kotlin.Enum?>? declared in kotlin.Enum
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Enum<E of kotlin.Enum>
   FUN name:test visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY
       VAR name:r type:kotlin.String [var]