[FIR] Add incoming edges to local class's property initializers

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/dfa/cfg/ControlFlowGraphBuilder.kt

@@ -12,6 +12,7 @@ import org.jetbrains.kotlin.fir.expressions.*
 import org.jetbrains.kotlin.fir.render
 import org.jetbrains.kotlin.fir.resolve.dfa.*
 import org.jetbrains.kotlin.fir.resolve.transformers.body.resolve.resultType
+import org.jetbrains.kotlin.fir.symbols.impl.FirCallableSymbol
 import org.jetbrains.kotlin.fir.symbols.impl.FirFunctionSymbol
 import org.jetbrains.kotlin.fir.types.isNothing
 
@@ -54,7 +55,7 @@ class ControlFlowGraphBuilder {
 
     private val exitsFromCompletedPostponedAnonymousFunctions: MutableList<PostponedLambdaExitNode> = mutableListOf()
 
-    private val enterToLocalClassesMembers: MutableMap<FirFunctionSymbol<*>, CFGNode<*>?> = mutableMapOf()
+    private val enterToLocalClassesMembers: MutableMap<FirCallableSymbol<*>, CFGNode<*>?> = mutableMapOf()
 
     var levelCounter: Int = 0
         private set
@@ -256,29 +257,29 @@ class ControlFlowGraphBuilder {
     }
 
     fun prepareForLocalClassMembers(members: Collection<FirCallableMemberDeclaration<*>>) {
-        members.forEachFunction {
+        members.forEachMember {
             enterToLocalClassesMembers[it.symbol] = lastNodes.topOrNull()
         }
     }
 
     fun cleanAfterForLocalClassMembers(members: Collection<FirCallableMemberDeclaration<*>>) {
-        members.forEachFunction {
+        members.forEachMember {
             enterToLocalClassesMembers.remove(it.symbol)
         }
     }
 
-    private inline fun Collection<FirCallableMemberDeclaration<*>>.forEachFunction(block: (FirFunction<*>) -> Unit) {
+    private inline fun Collection<FirCallableMemberDeclaration<*>>.forEachMember(block: (FirCallableDeclaration<*>) -> Unit) {
         for (member in this) {
-            for (function in member.unwrap()) {
-                block(function)
+            for (callableDeclaration in member.unwrap()) {
+                block(callableDeclaration)
             }
         }
     }
 
-    private fun FirCallableMemberDeclaration<*>.unwrap(): List<FirFunction<*>> =
+    private fun FirCallableMemberDeclaration<*>.unwrap(): List<FirCallableDeclaration<*>> =
         when (this) {
             is FirFunction<*> -> listOf(this)
-            is FirProperty -> listOfNotNull(this.getter, this.setter)
+            is FirProperty -> listOfNotNull(this.getter, this.setter, this)
             else -> emptyList()
         }
 
@@ -332,6 +333,9 @@ class ControlFlowGraphBuilder {
         val enterNode = createPropertyInitializerEnterNode(property)
         val exitNode = createPropertyInitializerExitNode(property)
         topLevelVariableInitializerExitNodes.push(exitNode)
+        enterToLocalClassesMembers[property.symbol]?.let {
+            addEdge(it, enterNode, preferredKind = EdgeKind.Dfg)
+        }
         exitNodes.push(exitNode)
         lexicalScopes.push(stackOf(enterNode))
         graph.enterNode = enterNode

compiler/testData/diagnostics/tests/dataFlow/local/LocalClassDelegatedProperties.fir.kt

@@ -11,7 +11,7 @@ fun test(del: Any?) {
   if (del !is Del) return
 
   class Local {
-    val delegatedVal by <!INAPPLICABLE_CANDIDATE!>df<!>(del)
-    val delegatedVal1: Int by <!INAPPLICABLE_CANDIDATE!>df<!>(del)
+    val delegatedVal by df(del)
+    val delegatedVal1: Int by df(del)
   }
 }

compiler/testData/diagnostics/tests/dataFlow/local/LocalClassProperty.fir.kt

@@ -2,10 +2,10 @@ fun test(x: Any?) {
   if (x !is String) return
 
   class C {
-    val v = x.<!UNRESOLVED_REFERENCE!>length<!>
+    val v = x.length
 
     val vGet: Int
-      get() = x.<!UNRESOLVED_REFERENCE!>length<!>
+      get() = x.length
 
     val s: String = x
   }