diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrBlockBodyImpl.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrBlockBodyImpl.kt
index b98ec2d385c..1d47e79470e 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrBlockBodyImpl.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrBlockBodyImpl.kt
@@ -34,6 +34,10 @@ class IrBlockBodyImpl(
         this.statements.addAll(statements)
     }
 
+    constructor(startOffset: Int, endOffset: Int, fn: IrBlockBodyImpl.() -> Unit) : this(startOffset, endOffset) {
+        this.fn()
+    }
+
     override val statements: MutableList<IrStatement> = ArrayList()
 
     override fun <R, D> accept(visitor: IrElementVisitor<R, D>, data: D): R {
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrExpressionBodyImpl.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrExpressionBodyImpl.kt
index b70f259d2b7..e3122f59ea7 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrExpressionBodyImpl.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrExpressionBodyImpl.kt
@@ -35,6 +35,10 @@ class IrExpressionBodyImpl(
 
     constructor(expression: IrExpression) : this(expression.startOffset, expression.endOffset, expression)
 
+    constructor(startOffset: Int, endOffset: Int, initFn: IrExpressionBodyImpl.() -> Unit) : this(startOffset, endOffset) {
+        this.initFn()
+    }
+
     override lateinit var expression: IrExpression
 
     override fun <R, D> accept(visitor: IrElementVisitor<R, D>, data: D): R =