diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FunctionInlining.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FunctionInlining.kt
index 762e32ebc40..8f96b4ec4e6 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FunctionInlining.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FunctionInlining.kt
@@ -14,7 +14,6 @@ import org.jetbrains.kotlin.backend.konan.Context
 import org.jetbrains.kotlin.backend.konan.descriptors.resolveFakeOverride
 import org.jetbrains.kotlin.backend.konan.ir.*
 import org.jetbrains.kotlin.config.languageVersionSettings
-import org.jetbrains.kotlin.descriptors.ValueDescriptor
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.builders.irGet
@@ -23,12 +22,10 @@ import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.*
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
-import org.jetbrains.kotlin.ir.symbols.IrValueSymbol
 import org.jetbrains.kotlin.ir.symbols.impl.IrReturnableBlockSymbolImpl
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
-import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.util.OperatorNameConventions
@@ -238,9 +235,9 @@ internal class FunctionInlining(val context: Context) : IrElementTransformerVoid
 
                     val immediateCall = with(expression) {
                         if (function is IrConstructor)
-                            IrConstructorCallImpl.fromSymbolOwner(startOffset, endOffset, type, function.symbol)
+                            IrConstructorCallImpl.fromSymbolOwner(startOffset, endOffset, function.returnType, function.symbol)
                         else
-                            IrCallImpl(startOffset, endOffset, type, functionArgument.symbol)
+                            IrCallImpl(startOffset, endOffset, function.returnType, functionArgument.symbol)
                     }.apply {
                         functionParameters.forEach {
                             val argument =
@@ -249,15 +246,19 @@ internal class FunctionInlining(val context: Context) : IrElementTransformerVoid
                                     else
                                         valueParameters[unboundIndex++].second
                             when (it) {
-                                function.dispatchReceiverParameter -> this.dispatchReceiver = argument
-                                function.extensionReceiverParameter -> this.extensionReceiver = argument
-                                else -> putValueArgument(it.index, argument)
+                                function.dispatchReceiverParameter ->
+                                    this.dispatchReceiver = argument.implicitCastIfNeededTo(function.dispatchReceiverParameter!!.type)
+
+                                function.extensionReceiverParameter ->
+                                    this.extensionReceiver = argument.implicitCastIfNeededTo(function.extensionReceiverParameter!!.type)
+
+                                else -> putValueArgument(it.index, argument.implicitCastIfNeededTo(function.valueParameters[it.index].type))
                             }
                         }
                         assert(unboundIndex == valueParameters.size) { "Not all arguments of <invoke> are used" }
                         for (index in 0 until functionArgument.typeArgumentsCount)
                             putTypeArgument(index, functionArgument.getTypeArgument(index))
-                    }
+                    }.implicitCastIfNeededTo(expression.type)
                     return this@FunctionInlining.visitExpression(super.visitExpression(immediateCall))
                 }
                 if (functionArgument !is IrBlock)
@@ -273,6 +274,12 @@ internal class FunctionInlining(val context: Context) : IrElementTransformerVoid
             override fun visitElement(element: IrElement) = element.accept(this, null)
         }
 
+        private fun IrExpression.implicitCastIfNeededTo(type: IrType) =
+                if (type == this.type)
+                    this
+                else
+                    IrTypeOperatorCallImpl(startOffset, endOffset, type, IrTypeOperator.IMPLICIT_CAST, type, this)
+
         private fun isLambdaCall(irCall: IrCall): Boolean {
             val callee = irCall.symbol.owner
             val dispatchReceiver = callee.dispatchReceiverParameter ?: return false
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/PostInlineLowering.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/PostInlineLowering.kt
index 46616b2f434..dc9c6abe01a 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/PostInlineLowering.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/PostInlineLowering.kt
@@ -100,9 +100,9 @@ internal class PostInlineLowering(val context: Context) : FileLoweringPass {
                         // Basic Multilingual Plane, so we could just append data "as is".
                         builder.append(value.toChar())
                     }
-                    expression.putValueArgument(0, IrConstImpl<String>(
+                    expression.putValueArgument(0, IrConstImpl(
                             expression.startOffset, expression.endOffset,
-                            context.ir.symbols.immutableBlob.typeWithoutArguments,
+                            context.irBuiltIns.stringType,
                             IrConstKind.String, builder.toString()))
                 } else if (expression.symbol.owner.isTypeOfIntrinsic()) {
                     val type = expression.getTypeArgument(0)