[FIR] Add FirControlFloGraph owner supertype to FirField

FirField, just like FirProperty, can have control flow graph of it's
  intializer

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/declarations/FirJavaField.kt

@@ -16,6 +16,7 @@ import org.jetbrains.kotlin.fir.declarations.builder.FirFieldBuilder
 import org.jetbrains.kotlin.fir.expressions.FirAnnotation
 import org.jetbrains.kotlin.fir.expressions.FirExpression
 import org.jetbrains.kotlin.fir.languageVersionSettings
+import org.jetbrains.kotlin.fir.references.FirControlFlowGraphReference
 import org.jetbrains.kotlin.fir.symbols.impl.FirFieldSymbol
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
 import org.jetbrains.kotlin.fir.types.FirTypeRef
@@ -56,7 +57,7 @@ class FirJavaField @FirImplementationDetail constructor(
     override val getter: FirPropertyAccessor? get() = null
     override val setter: FirPropertyAccessor? get() = null
     override val backingField: FirBackingField? = null
-
+    override val controlFlowGraphReference: FirControlFlowGraphReference? get() = null
     override val origin: FirDeclarationOrigin
         get() = FirDeclarationOrigin.Java
 
@@ -153,6 +154,8 @@ class FirJavaField @FirImplementationDetail constructor(
     override fun replaceGetter(newGetter: FirPropertyAccessor?) {}
 
     override fun replaceSetter(newSetter: FirPropertyAccessor?) {}
+
+    override fun replaceControlFlowGraphReference(newControlFlowGraphReference: FirControlFlowGraphReference?) {}
 }
 
 @FirBuilderDsl

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/FirField.kt

@@ -10,6 +10,7 @@ import org.jetbrains.kotlin.fir.FirElement
 import org.jetbrains.kotlin.fir.FirModuleData
 import org.jetbrains.kotlin.fir.expressions.FirAnnotation
 import org.jetbrains.kotlin.fir.expressions.FirExpression
+import org.jetbrains.kotlin.fir.references.FirControlFlowGraphReference
 import org.jetbrains.kotlin.fir.symbols.impl.FirFieldSymbol
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
 import org.jetbrains.kotlin.fir.types.FirTypeRef
@@ -22,7 +23,7 @@ import org.jetbrains.kotlin.fir.visitors.*
  * DO NOT MODIFY IT MANUALLY
  */
 
-abstract class FirField : FirVariable() {
+abstract class FirField : FirVariable(), FirControlFlowGraphOwner {
     abstract override val source: KtSourceElement?
     abstract override val moduleData: FirModuleData
     abstract override val resolvePhase: FirResolvePhase
@@ -44,6 +45,7 @@ abstract class FirField : FirVariable() {
     abstract override val setter: FirPropertyAccessor?
     abstract override val backingField: FirBackingField?
     abstract override val annotations: List<FirAnnotation>
+    abstract override val controlFlowGraphReference: FirControlFlowGraphReference?
     abstract override val symbol: FirFieldSymbol
 
     override fun <R, D> accept(visitor: FirVisitor<R, D>, data: D): R = visitor.visitField(this, data)
@@ -66,6 +68,8 @@ abstract class FirField : FirVariable() {
 
     abstract override fun replaceSetter(newSetter: FirPropertyAccessor?)
 
+    abstract override fun replaceControlFlowGraphReference(newControlFlowGraphReference: FirControlFlowGraphReference?)
+
     abstract override fun <D> transformTypeParameters(transformer: FirTransformer<D>, data: D): FirField
 
     abstract override fun <D> transformStatus(transformer: FirTransformer<D>, data: D): FirField

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirFieldBuilder.kt

@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.fir.declarations.builder.FirDeclarationBuilder
 import org.jetbrains.kotlin.fir.declarations.impl.FirFieldImpl
 import org.jetbrains.kotlin.fir.expressions.FirAnnotation
 import org.jetbrains.kotlin.fir.expressions.FirExpression
+import org.jetbrains.kotlin.fir.references.FirControlFlowGraphReference
 import org.jetbrains.kotlin.fir.symbols.impl.FirFieldSymbol
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
 import org.jetbrains.kotlin.fir.types.FirTypeRef

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/impl/FirFieldImpl.kt

@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.fir.declarations.FirResolvePhase
 import org.jetbrains.kotlin.fir.declarations.FirTypeParameterRef
 import org.jetbrains.kotlin.fir.expressions.FirAnnotation
 import org.jetbrains.kotlin.fir.expressions.FirExpression
+import org.jetbrains.kotlin.fir.references.FirControlFlowGraphReference
 import org.jetbrains.kotlin.fir.symbols.impl.FirFieldSymbol
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
 import org.jetbrains.kotlin.fir.types.FirTypeRef
@@ -56,6 +57,7 @@ class FirFieldImpl @FirImplementationDetail constructor(
     override val isVal: Boolean get() = !isVar
     override val getter: FirPropertyAccessor? get() = null
     override val setter: FirPropertyAccessor? get() = null
+    override var controlFlowGraphReference: FirControlFlowGraphReference? = null
 
     init {
         symbol.bind(this)
@@ -68,6 +70,7 @@ class FirFieldImpl @FirImplementationDetail constructor(
         initializer?.accept(visitor, data)
         backingField?.accept(visitor, data)
         annotations.forEach { it.accept(visitor, data) }
+        controlFlowGraphReference?.accept(visitor, data)
     }
 
     override fun <D> transformChildren(transformer: FirTransformer<D>, data: D): FirFieldImpl {
@@ -128,6 +131,7 @@ class FirFieldImpl @FirImplementationDetail constructor(
 
     override fun <D> transformOtherChildren(transformer: FirTransformer<D>, data: D): FirFieldImpl {
         transformAnnotations(transformer, data)
+        controlFlowGraphReference = controlFlowGraphReference?.transform(transformer, data)
         return this
     }
 
@@ -152,4 +156,8 @@ class FirFieldImpl @FirImplementationDetail constructor(
     override fun replaceGetter(newGetter: FirPropertyAccessor?) {}
 
     override fun replaceSetter(newSetter: FirPropertyAccessor?) {}
+
+    override fun replaceControlFlowGraphReference(newControlFlowGraphReference: FirControlFlowGraphReference?) {
+        controlFlowGraphReference = newControlFlowGraphReference
+    }
 }

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/visitors/FirDefaultVisitor.kt

@@ -160,8 +160,6 @@ abstract class FirDefaultVisitor<out R, in D> : FirVisitor<R, D>() {
 
     override fun visitCallableDeclaration(callableDeclaration: FirCallableDeclaration, data: D): R  = visitTypedDeclaration(callableDeclaration, data)
 
-    override fun visitField(field: FirField, data: D): R  = visitVariable(field, data)
-
     override fun visitEnumEntry(enumEntry: FirEnumEntry, data: D): R  = visitVariable(enumEntry, data)
 
     override fun visitFile(file: FirFile, data: D): R  = visitDeclaration(file, data)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/visitors/FirDefaultVisitorVoid.kt

@@ -160,8 +160,6 @@ abstract class FirDefaultVisitorVoid : FirVisitorVoid() {
 
     override fun visitCallableDeclaration(callableDeclaration: FirCallableDeclaration)  = visitTypedDeclaration(callableDeclaration)
 
-    override fun visitField(field: FirField)  = visitVariable(field)
-
     override fun visitEnumEntry(enumEntry: FirEnumEntry)  = visitVariable(enumEntry)
 
     override fun visitFile(file: FirFile)  = visitDeclaration(file)

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/FirTreeBuilder.kt

@@ -39,7 +39,7 @@ object FirTreeBuilder : AbstractFirTreeBuilder() {
     val variable by sealedElement(Declaration, callableDeclaration, statement)
     val valueParameter by element(Declaration, variable, controlFlowGraphOwner)
     val property by element(Declaration, variable, typeParametersOwner, controlFlowGraphOwner)
-    val field by element(Declaration, variable)
+    val field by element(Declaration, variable, controlFlowGraphOwner)
     val enumEntry by element(Declaration, variable)
 
     val classLikeDeclaration by sealedElement(Declaration, memberDeclaration, statement)