diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/ExpressionHelpers.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/ExpressionHelpers.kt
index abbe3550c2b..2bc4f618191 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/ExpressionHelpers.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/ExpressionHelpers.kt
@@ -14,6 +14,7 @@ import org.jetbrains.kotlin.ir.expressions.impl.*
 import org.jetbrains.kotlin.ir.symbols.*
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.classifierOrFail
+import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.utils.addToStdlib.assertedCast
 
 
@@ -46,8 +47,12 @@ inline fun IrBuilderWithScope.irLetS(
 }
 
 
-fun <T : IrElement> IrStatementsBuilder<T>.irTemporary(value: IrExpression, nameHint: String? = null): IrVariable {
-    val temporary = scope.createTemporaryVariable(value, nameHint)
+fun <T : IrElement> IrStatementsBuilder<T>.irTemporary(
+    value: IrExpression,
+    nameHint: String? = null,
+    typeHint: KotlinType? = null
+): IrVariable {
+    val temporary = scope.createTemporaryVariable(value, nameHint, type = typeHint)
     +temporary
     return temporary
 }
@@ -58,8 +63,14 @@ fun <T : IrElement> IrStatementsBuilder<T>.defineTemporary(value: IrExpression,
     return temporary.descriptor
 }
 
-fun <T : IrElement> IrStatementsBuilder<T>.irTemporaryVar(value: IrExpression, nameHint: String? = null): IrVariable {
-    val temporary = scope.createTemporaryVariable(value, nameHint, isMutable = true)
+fun <T : IrElement> IrStatementsBuilder<T>.irTemporaryVar(
+    value: IrExpression,
+    nameHint: String? = null,
+    typeHint: KotlinType? = null,
+    parent: IrDeclarationParent? = null
+): IrVariable {
+    val temporary = scope.createTemporaryVariable(value, nameHint, isMutable = true, type = typeHint)
+    parent?.let { temporary.parent = it }
     +temporary
     return temporary
 }
@@ -125,7 +136,7 @@ fun IrBuilderWithScope.irIfThenMaybeElse(type: IrType, condition: IrExpression,
 fun IrBuilderWithScope.irIfNull(type: IrType, subject: IrExpression, thenPart: IrExpression, elsePart: IrExpression) =
     irIfThenElse(type, irEqualsNull(subject), thenPart, elsePart)
 
-fun IrBuilderWithScope.irThrowNpe(origin: IrStatementOrigin) =
+fun IrBuilderWithScope.irThrowNpe(origin: IrStatementOrigin? = null) =
     IrNullaryPrimitiveImpl(startOffset, endOffset, context.irBuiltIns.nothingType, origin, context.irBuiltIns.throwNpeSymbol)
 
 fun IrBuilderWithScope.irIfThenReturnTrue(condition: IrExpression) =
@@ -165,7 +176,7 @@ fun IrBuilderWithScope.irEqualsNull(argument: IrExpression) =
 
 fun IrBuilderWithScope.irEquals(arg1: IrExpression, arg2: IrExpression) =
     primitiveOp2(
-        startOffset, endOffset, context.irBuiltIns.eqeqSymbol, IrStatementOrigin.EXCLEQ,
+        startOffset, endOffset, context.irBuiltIns.eqeqSymbol, IrStatementOrigin.EQEQ,
         arg1, arg2
     )
 
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/Scope.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/Scope.kt
index c5bd79e0319..45802b1275d 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/Scope.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/Scope.kt
@@ -60,9 +60,10 @@ class Scope(val scopeOwnerSymbol: IrSymbol) {
         irExpression: IrExpression,
         nameHint: String? = null,
         isMutable: Boolean = false,
+        type: KotlinType? = null,
         origin: IrDeclarationOrigin = IrDeclarationOrigin.IR_TEMPORARY_VARIABLE
     ): IrVariable {
-        val originalKotlinType = irExpression.type.originalKotlinType ?: irExpression.type.toKotlinType()
+        val originalKotlinType = type ?: (irExpression.type.originalKotlinType ?: irExpression.type.toKotlinType())
         return IrVariableImpl(
             irExpression.startOffset, irExpression.endOffset, origin,
             createDescriptorForTemporaryVariable(