IR: Fixed some parents

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/ExpressionHelpers.kt

@@ -18,6 +18,7 @@ import org.jetbrains.kotlin.ir.util.parentAsClass
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.utils.addToStdlib.assertedCast
 
+val IrBuilderWithScope.parent get() = scope.getLocalDeclarationParent()
 
 inline fun IrBuilderWithScope.irLet(
     value: IrExpression,
@@ -68,11 +69,9 @@ fun <T : IrElement> IrStatementsBuilder<T>.defineTemporary(value: IrExpression,
 fun <T : IrElement> IrStatementsBuilder<T>.irTemporaryVar(
     value: IrExpression,
     nameHint: String? = null,
-    typeHint: KotlinType? = null,
-    parent: IrDeclarationParent? = null
+    typeHint: KotlinType? = null
 ): IrVariable {
     val temporary = scope.createTemporaryVariable(value, nameHint, isMutable = true, type = typeHint)
-    parent?.let { temporary.parent = it }
     +temporary
     return temporary
 }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/Scope.kt

@@ -41,7 +41,7 @@ import org.jetbrains.kotlin.types.KotlinType
 class Scope(val scopeOwnerSymbol: IrSymbol) {
     val scopeOwner: DeclarationDescriptor get() = scopeOwnerSymbol.descriptor
 
-    private fun getVariableParent(): IrDeclarationParent {
+    fun getLocalDeclarationParent(): IrDeclarationParent {
         if (!scopeOwnerSymbol.isBound) throw AssertionError("Unbound symbol: $scopeOwner")
         val scopeOwnerElement = scopeOwnerSymbol.owner
         return when (scopeOwnerElement) {
@@ -87,7 +87,7 @@ class Scope(val scopeOwnerSymbol: IrSymbol) {
             irType ?: irExpression.type,
             irExpression
         ).apply {
-            parent = getVariableParent()
+            parent = getLocalDeclarationParent()
         }
     }
 }