[IR] Specify IrType in irTemporary

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

@@ -50,9 +50,10 @@ inline fun IrBuilderWithScope.irLetS(
 fun <T : IrElement> IrStatementsBuilder<T>.irTemporary(
     value: IrExpression,
     nameHint: String? = null,
-    typeHint: KotlinType? = null
+    typeHint: KotlinType? = null,
+    irType: IrType? = null
 ): IrVariable {
-    val temporary = scope.createTemporaryVariable(value, nameHint, type = typeHint)
+    val temporary = scope.createTemporaryVariable(value, nameHint, type = typeHint, irType = irType)
     +temporary
     return temporary
 }

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

@@ -30,6 +30,7 @@ import org.jetbrains.kotlin.ir.symbols.IrSymbol
 import org.jetbrains.kotlin.ir.symbols.impl.IrClassSymbolImpl
 import org.jetbrains.kotlin.ir.symbols.impl.IrFieldSymbolImpl
 import org.jetbrains.kotlin.ir.symbols.impl.createFunctionSymbol
+import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.impl.originalKotlinType
 import org.jetbrains.kotlin.ir.types.toKotlinType
 import org.jetbrains.kotlin.name.Name
@@ -61,7 +62,8 @@ class Scope(val scopeOwnerSymbol: IrSymbol) {
         nameHint: String? = null,
         isMutable: Boolean = false,
         type: KotlinType? = null,
-        origin: IrDeclarationOrigin = IrDeclarationOrigin.IR_TEMPORARY_VARIABLE
+        origin: IrDeclarationOrigin = IrDeclarationOrigin.IR_TEMPORARY_VARIABLE,
+        irType: IrType? = null
     ): IrVariable {
         val originalKotlinType = type ?: (irExpression.type.originalKotlinType ?: irExpression.type.toKotlinType())
         return IrVariableImpl(
@@ -70,7 +72,7 @@ class Scope(val scopeOwnerSymbol: IrSymbol) {
                 originalKotlinType,
                 nameHint, isMutable
             ),
-            irExpression.type,
+            irType ?: irExpression.type,
             irExpression
         )
     }