IR: Fixed some parents

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt

@@ -305,6 +305,11 @@ fun IrDeclarationContainer.addChild(declaration: IrDeclaration) {
     declaration.accept(SetDeclarationsParentVisitor, this)
 }
 
+fun <T: IrElement> T.setDeclarationsParent(parent: IrDeclarationParent): T {
+    accept(SetDeclarationsParentVisitor, parent)
+    return this
+}
+
 object SetDeclarationsParentVisitor : IrElementVisitor<Unit, IrDeclarationParent> {
     override fun visitElement(element: IrElement, data: IrDeclarationParent) {
         if (element !is IrDeclarationParent) {

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/SharedVariablesLowering.kt

@@ -86,6 +86,7 @@ class SharedVariablesLowering(val context: BackendContext) : FunctionLoweringPas
                     if (declaration !in sharedVariables) return declaration
 
                     val newDeclaration = context.sharedVariablesManager.declareSharedVariable(declaration)
+                    newDeclaration.parent = irFunction
                     transformedDescriptors[declaration.symbol] = newDeclaration.symbol
 
                     return context.sharedVariablesManager.defineSharedValue(declaration, newDeclaration)

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/TailrecLowering.kt

@@ -53,7 +53,7 @@ private fun lowerTailRecursionCalls(context: BackendContext, irFunction: IrFunct
     irFunction.body = builder.irBlockBody {
         // Define variables containing current values of parameters:
         val parameterToVariable = parameters.associate {
-            it to irTemporaryVar(irGet(it), nameHint = it.symbol.suggestVariableName(), parent = irFunction)
+            it to irTemporaryVar(irGet(it), nameHint = it.symbol.suggestVariableName())
         }
         // (these variables are to be updated on any tail call).
 
@@ -65,7 +65,7 @@ private fun lowerTailRecursionCalls(context: BackendContext, irFunction: IrFunct
                 // Read variables containing current values of parameters:
                 val parameterToNew = parameters.associate {
                     val variable = parameterToVariable[it]!!
-                    it to irTemporary(irGet(variable), nameHint = it.symbol.suggestVariableName()).also { it.parent = irFunction }
+                    it to irTemporary(irGet(variable), nameHint = it.symbol.suggestVariableName())
                 }
 
                 val transformer = BodyTransformer(