diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt
index 460fd82690c..7b3e88f7fac 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt
@@ -2,10 +2,7 @@ package org.jetbrains.kotlin.backend.konan.llvm
 
 import kotlinx.cinterop.*
 import llvm.*
-import org.jetbrains.kotlin.backend.konan.Context
-import org.jetbrains.kotlin.backend.konan.KonanConfigKeys
-import org.jetbrains.kotlin.backend.konan.KonanPhase
-import org.jetbrains.kotlin.backend.konan.PhaseManager
+import org.jetbrains.kotlin.backend.konan.*
 import org.jetbrains.kotlin.backend.konan.descriptors.*
 import org.jetbrains.kotlin.backend.konan.ir.IrInlineFunctionBody
 import org.jetbrains.kotlin.backend.konan.ir.getArguments
@@ -27,9 +24,7 @@ import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameUnsafe
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.TypeUtils
-import org.jetbrains.kotlin.types.typeUtil.isNothing
-import org.jetbrains.kotlin.types.typeUtil.isTypeParameter
-import org.jetbrains.kotlin.types.typeUtil.isUnit
+import org.jetbrains.kotlin.types.typeUtil.*
 import org.jetbrains.kotlin.utils.addToStdlib.singletonList
 
 
@@ -1130,6 +1125,7 @@ internal class CodeGeneratorVisitor(val context: Context) : IrElementVisitorVoid
     private fun evaluateTypeOperator(value: IrTypeOperatorCall): LLVMValueRef {
         when (value.operator) {
             IrTypeOperator.CAST                      -> return evaluateCast(value)
+            IrTypeOperator.IMPLICIT_INTEGER_COERCION -> return evaluateIntegerCoercion(value)
             IrTypeOperator.IMPLICIT_CAST             -> return evaluateExpression(value.argument)
             IrTypeOperator.IMPLICIT_NOTNULL          -> TODO("${ir2string(value)}")
             IrTypeOperator.IMPLICIT_COERCION_TO_UNIT -> {
@@ -1140,7 +1136,31 @@ internal class CodeGeneratorVisitor(val context: Context) : IrElementVisitorVoid
             IrTypeOperator.INSTANCEOF                -> return evaluateInstanceOf(value)
             IrTypeOperator.NOT_INSTANCEOF            -> return evaluateNotInstanceOf(value)
         }
+    }
 
+    //-------------------------------------------------------------------------//
+
+    private fun KotlinType.isPrimitiveInteger(): Boolean {
+        return isPrimitiveNumberType() &&
+               !KotlinBuiltIns.isFloat(this) &&
+               !KotlinBuiltIns.isDouble(this) &&
+               !KotlinBuiltIns.isChar(this)
+    }
+
+    private fun evaluateIntegerCoercion(value: IrTypeOperatorCall): LLVMValueRef {
+        context.log("evaluateIntegerCoercion    : ${ir2string(value)}")
+        val type = value.typeOperand
+        assert(type.isPrimitiveInteger())
+        val result = evaluateExpression(value.argument)
+        val llvmSrcType = codegen.getLLVMType(value.argument.type)
+        val llvmDstType = codegen.getLLVMType(type)
+        val srcWidth = LLVMGetIntTypeWidth(llvmSrcType)
+        val dstWidth = LLVMGetIntTypeWidth(llvmDstType)
+        return when {
+            srcWidth == dstWidth           -> result
+            srcWidth > dstWidth            -> LLVMBuildTrunc(codegen.builder, result, llvmDstType, "")!!
+            else /* srcWidth < dstWidth */ -> LLVMBuildSExt(codegen.builder, result, llvmDstType, "")!!
+        }
     }
 
     //-------------------------------------------------------------------------//
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/Autoboxing.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/Autoboxing.kt
index a4b4bdc5efc..45cf4f25761 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/Autoboxing.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/Autoboxing.kt
@@ -51,7 +51,8 @@ private class AutoboxingTransformer(val context: Context) : AbstractValueUsageTr
     }
 
     override fun IrExpression.useInTypeOperator(operator: IrTypeOperator, typeOperand: KotlinType): IrExpression {
-        return if (operator == IrTypeOperator.IMPLICIT_COERCION_TO_UNIT) {
+        return if (operator == IrTypeOperator.IMPLICIT_COERCION_TO_UNIT ||
+                   operator == IrTypeOperator.IMPLICIT_INTEGER_COERCION) {
             this
         } else {
             // Codegen expects the argument of type-checking operator to be an object reference:
@@ -68,7 +69,8 @@ private class AutoboxingTransformer(val context: Context) : AbstractValueUsageTr
         val newTypeOperand = getRuntimeReferenceType(expression.typeOperand)
 
         return when (expression.operator) {
-            IrTypeOperator.IMPLICIT_COERCION_TO_UNIT -> expression
+            IrTypeOperator.IMPLICIT_COERCION_TO_UNIT,
+            IrTypeOperator.IMPLICIT_INTEGER_COERCION -> expression
 
             IrTypeOperator.CAST, IrTypeOperator.IMPLICIT_CAST,
             IrTypeOperator.IMPLICIT_NOTNULL, IrTypeOperator.SAFE_CAST -> {
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/DelegationLowering.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/DelegationLowering.kt
index 10b02e99038..359b679c883 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/DelegationLowering.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/DelegationLowering.kt
@@ -60,10 +60,6 @@ internal class ClassDelegationLowering(val context: Context) : DeclarationContai
         val statement = body.statements.single()
         val delegatedCall = ((statement as? IrReturn)?.value ?: statement) as? IrCall
                 ?: throw AssertionError("Unexpected method body: $statement")
-        val propertyGetter = delegatedCall.dispatchReceiver as? IrGetValue
-                ?: throw AssertionError("Unexpected dispatch receiver: ${delegatedCall.dispatchReceiver}")
-        val propertyDescriptor = propertyGetter.descriptor as? PropertyDescriptor
-                ?: throw AssertionError("Unexpected dispatch receiver descriptor: ${propertyGetter.descriptor}")
         val delegated = context.specialDescriptorsFactory.getBridgeDescriptor(
                 OverriddenFunctionDescriptor(descriptor, delegatedCall.descriptor as FunctionDescriptor))
         val newFunction = IrFunctionImpl(irFunction.startOffset, irFunction.endOffset, irFunction.origin, delegated)
@@ -71,9 +67,7 @@ internal class ClassDelegationLowering(val context: Context) : DeclarationContai
         val irBlockBody = IrBlockBodyImpl(irFunction.startOffset, irFunction.endOffset)
         val returnType = delegatedCall.descriptor.returnType!!
         val irCall = IrCallImpl(irFunction.startOffset, irFunction.endOffset, returnType, delegatedCall.descriptor, null)
-        val receiver = IrGetValueImpl(irFunction.startOffset, irFunction.endOffset,
-                (irDeclarationContainer as IrClass).descriptor.thisAsReceiverParameter)
-        irCall.dispatchReceiver = IrGetFieldImpl(irFunction.startOffset, irFunction.endOffset, propertyDescriptor, receiver)
+        irCall.dispatchReceiver = delegatedCall.dispatchReceiver
         irCall.extensionReceiver = delegated.extensionReceiverParameter?.let { extensionReceiver ->
             IrGetValueImpl(irFunction.startOffset, irFunction.endOffset, extensionReceiver)
         }
diff --git a/gradle.properties b/gradle.properties
index 17466c759fb..d0fc7df717b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,4 +2,4 @@ kotlin_version=1.1-M03
 llvmVersion = 3.9.0
 minMacOsVersion = 10.10
 #kotlinCompilerModule=org.jetbrains.kotlin:kotlin-compiler:1.1-SNAPSHOT
-kotlinCompilerModule=org.jetbrains.kotlin:kotlin-compiler:1.1-20170224.164531-429
+kotlinCompilerModule=org.jetbrains.kotlin:kotlin-compiler:1.1-20170303.084850-431
\ No newline at end of file