diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInlineClassLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInlineClassLowering.kt
index 922e83a409e..a06311f4e95 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInlineClassLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInlineClassLowering.kt
@@ -200,9 +200,7 @@ private class JvmInlineClassLowering(private val context: JvmBackendContext) : F
         replacement.body = context.createIrBuilder(replacement.symbol, replacement.startOffset, replacement.endOffset).irBlockBody(
             replacement
         ) {
-            val thisVar = irTemporaryVarDeclaration(
-                replacement.returnType, nameHint = "\$this", isMutable = false
-            )
+            val thisVar = irTemporary(irType = replacement.returnType, nameHint = "\$this")
             valueMap[constructor.constructedClass.thisReceiver!!.symbol] = thisVar
 
             constructor.body?.statements?.forEach { statement ->
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 9fa53829fea..f76b6a974f5 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
@@ -42,39 +42,18 @@ inline fun IrBuilderWithScope.irLetS(
     }
 }
 
-
 fun <T : IrElement> IrStatementsBuilder<T>.irTemporary(
-    value: IrExpression,
+    value: IrExpression? = null,
     nameHint: String? = null,
-    typeHint: KotlinType? = null,
-    irType: IrType? = null
+    irType: IrType = value?.type!!, // either value or irType should be supplied at callsite
+    isMutable: Boolean = false,
 ): IrVariable {
-    val temporary = scope.createTemporaryVariable(value, nameHint, irType = irType)
+    val temporary = scope.createTemporaryVariableDeclaration(irType, nameHint, isMutable)
+    value?.let { temporary.initializer = it }
     +temporary
     return temporary
 }
 
-fun <T : IrElement> IrStatementsBuilder<T>.irTemporaryVarDeclaration(
-    type: IrType,
-    nameHint: String? = null,
-    isMutable: Boolean = true
-): IrVariable {
-    val temporary = scope.createTemporaryVariableDeclaration(type, nameHint, isMutable = isMutable)
-    +temporary
-    return temporary
-}
-
-fun <T : IrElement> IrStatementsBuilder<T>.irTemporaryVar(
-    value: IrExpression,
-    nameHint: String? = null,
-    irType: IrType? = null
-): IrVariable {
-    val temporary = scope.createTemporaryVariable(value, nameHint, isMutable = true)
-    +temporary
-    return temporary
-}
-
-
 fun IrBuilderWithScope.irExprBody(value: IrExpression) =
     context.irFactory.createExpressionBody(startOffset, endOffset, value)
 
diff --git a/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/IrParcelSerializers.kt b/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/IrParcelSerializers.kt
index 502612e1d61..67cb5b63609 100644
--- a/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/IrParcelSerializers.kt
+++ b/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/IrParcelSerializers.kt
@@ -271,7 +271,7 @@ class IrSparseArrayParcelSerializer(
 ) : IrParcelSerializer {
     override fun AndroidIrBuilder.readParcel(parcel: IrValueDeclaration): IrExpression =
         irBlock {
-            val remainingSizeTemporary = irTemporaryVar(parcelReadInt(irGet(parcel)))
+            val remainingSizeTemporary = irTemporary(parcelReadInt(irGet(parcel)), isMutable = true)
 
             val sparseArrayConstructor = sparseArrayClass.constructors.first { irConstructor ->
                 irConstructor.valueParameters.size == 1 && irConstructor.valueParameters.single().type.isInt()
diff --git a/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/irUtils.kt b/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/irUtils.kt
index b84740fd9c0..2177a8faf68 100644
--- a/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/irUtils.kt
+++ b/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ir/irUtils.kt
@@ -125,7 +125,7 @@ fun IrClass.isSubclassOfFqName(fqName: String): Boolean =
     fqNameWhenAvailable?.asString() == fqName || superTypes.any { it.erasedUpperBound.isSubclassOfFqName(fqName) }
 
 inline fun IrBlockBuilder.forUntil(upperBound: IrExpression, loopBody: IrBlockBuilder.(IrValueDeclaration) -> Unit) {
-    val indexTemporary = irTemporaryVar(irInt(0))
+    val indexTemporary = irTemporary(irInt(0), isMutable = true)
     +irWhile().apply {
         condition = irNotEquals(irGet(indexTemporary), upperBound)
         body = irBlock {
diff --git a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializerIrGenerator.kt b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializerIrGenerator.kt
index 923b4ac7cb3..e90e2f6fbda 100644
--- a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializerIrGenerator.kt
+++ b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializerIrGenerator.kt
@@ -367,23 +367,19 @@ open class SerializerIrGenerator(
         val localSerialDesc = irTemporary(irGet(descriptorGetterSymbol.owner.returnType, irThis(), descriptorGetterSymbol), "desc")
 
         // workaround due to unavailability of labels (KT-25386)
-        val flagVar = irTemporaryVar(irBoolean(true), "flag")
+        val flagVar = irTemporary(irBoolean(true), "flag", isMutable = true)
 
-        val indexVar = irTemporaryVar(irInt(0), "index")
+        val indexVar = irTemporary(irInt(0), "index", isMutable = true)
 
         // calculating bit mask vars
         val blocksCnt = serializableProperties.bitMaskSlotCount()
 
         // var bitMask0 = 0, bitMask1 = 0...
-        val bitMasks = (0 until blocksCnt).map { irTemporaryVar(irInt(0), "bitMask$it") }
+        val bitMasks = (0 until blocksCnt).map { irTemporary(irInt(0), "bitMask$it", isMutable = true) }
         // var local0 = null, local1 = null ...
         val localProps = serializableProperties.mapIndexed { i, prop ->
             val (expr, type) = defaultValueAndType(prop)
-            irTemporaryVar(
-                expr,
-                "local$i",
-                type
-            )
+            irTemporary(expr, "local$i", type, isMutable = true)
         }
 
         //input = input.beginStructure(...)
diff --git a/plugins/parcelize/parcelize-compiler/src/org/jetbrains/kotlin/parcelize/ir/IrParcelSerializers.kt b/plugins/parcelize/parcelize-compiler/src/org/jetbrains/kotlin/parcelize/ir/IrParcelSerializers.kt
index 2b9d9df2481..51a4c5afd3d 100644
--- a/plugins/parcelize/parcelize-compiler/src/org/jetbrains/kotlin/parcelize/ir/IrParcelSerializers.kt
+++ b/plugins/parcelize/parcelize-compiler/src/org/jetbrains/kotlin/parcelize/ir/IrParcelSerializers.kt
@@ -292,7 +292,7 @@ class IrSparseArrayParcelSerializer(
 ) : IrParcelSerializer {
     override fun AndroidIrBuilder.readParcel(parcel: IrValueDeclaration): IrExpression {
         return irBlock {
-            val remainingSizeTemporary = irTemporaryVar(parcelReadInt(irGet(parcel)))
+            val remainingSizeTemporary = irTemporary(parcelReadInt(irGet(parcel)), isMutable = true)
 
             val sparseArrayConstructor = sparseArrayClass.constructors.first { irConstructor ->
                 irConstructor.valueParameters.size == 1 && irConstructor.valueParameters.single().type.isInt()
diff --git a/plugins/parcelize/parcelize-compiler/src/org/jetbrains/kotlin/parcelize/ir/irUtils.kt b/plugins/parcelize/parcelize-compiler/src/org/jetbrains/kotlin/parcelize/ir/irUtils.kt
index 879ad54c52d..facd7bbef72 100644
--- a/plugins/parcelize/parcelize-compiler/src/org/jetbrains/kotlin/parcelize/ir/irUtils.kt
+++ b/plugins/parcelize/parcelize-compiler/src/org/jetbrains/kotlin/parcelize/ir/irUtils.kt
@@ -134,7 +134,7 @@ fun IrClass.isSubclassOfFqName(fqName: String): Boolean {
 }
 
 inline fun IrBlockBuilder.forUntil(upperBound: IrExpression, loopBody: IrBlockBuilder.(IrValueDeclaration) -> Unit) {
-    val indexTemporary = irTemporaryVar(irInt(0))
+    val indexTemporary = irTemporary(irInt(0), isMutable = true)
     +irWhile().apply {
         condition = irNotEquals(irGet(indexTemporary), upperBound)
         body = irBlock {