Continue updating compiler to IR with symbols:

The symbols produced by the lowering are now bound.

Also:
* Simplify interop lowering and bridges building.
* Refactor IR validation.

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/common/AbstractValueUsageTransformer.kt

@@ -54,13 +54,14 @@ abstract class AbstractValueUsageTransformer(val builtIns: KotlinBuiltIns): IrEl
     protected open fun IrExpression.useAsArgument(parameter: ParameterDescriptor): IrExpression =
             this.useAsValue(parameter)
 
-    protected open fun IrExpression.useAsDispatchReceiver(function: CallableDescriptor): IrExpression =
-            this.useAsArgument(function.dispatchReceiverParameter!!)
+    protected open fun IrExpression.useAsDispatchReceiver(expression: IrMemberAccessExpression): IrExpression =
+            this.useAsArgument(expression.descriptor.dispatchReceiverParameter!!)
 
-    protected open fun IrExpression.useAsExtensionReceiver(function: CallableDescriptor): IrExpression =
-            this.useAsArgument(function.extensionReceiverParameter!!)
+    protected open fun IrExpression.useAsExtensionReceiver(expression: IrMemberAccessExpression): IrExpression =
+            this.useAsArgument(expression.descriptor.extensionReceiverParameter!!)
 
-    protected open fun IrExpression.useAsValueArgument(parameter: ValueParameterDescriptor): IrExpression =
+    protected open fun IrExpression.useAsValueArgument(expression: IrMemberAccessExpression,
+                                                       parameter: ValueParameterDescriptor): IrExpression =
             this.useAsArgument(parameter)
 
     protected open fun IrExpression.useForVariable(variable: VariableDescriptor): IrExpression =
@@ -81,12 +82,12 @@ abstract class AbstractValueUsageTransformer(val builtIns: KotlinBuiltIns): IrEl
         expression.transformChildrenVoid(this)
 
         with(expression) {
-            dispatchReceiver = dispatchReceiver?.useAsDispatchReceiver(descriptor)
-            extensionReceiver = extensionReceiver?.useAsExtensionReceiver(descriptor)
+            dispatchReceiver = dispatchReceiver?.useAsDispatchReceiver(expression)
+            extensionReceiver = extensionReceiver?.useAsExtensionReceiver(expression)
             for (index in descriptor.valueParameters.indices) {
                 val argument = getValueArgument(index) ?: continue
                 val parameter = descriptor.valueParameters[index]
-                putValueArgument(index, argument.useAsValueArgument(parameter))
+                putValueArgument(index, argument.useAsValueArgument(expression, parameter))
             }
         }
 
@@ -240,7 +241,7 @@ abstract class AbstractValueUsageTransformer(val builtIns: KotlinBuiltIns): IrEl
         declaration.descriptor.valueParameters.forEach { parameter ->
             val defaultValue = declaration.getDefault(parameter)
             if (defaultValue is IrExpressionBody) {
-                defaultValue.expression = defaultValue.expression.useAsValueArgument(parameter)
+                defaultValue.expression = defaultValue.expression.useAsArgument(parameter)
             }
         }
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/common/CheckIrElementVisitor.kt

@@ -17,8 +17,12 @@
 package org.jetbrains.kotlin.backend.common
 
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
+import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
+import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.ir.IrElement
+import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.expressions.*
+import org.jetbrains.kotlin.ir.symbols.IrSymbol
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.typeUtil.makeNullable
@@ -44,6 +48,12 @@ class CheckIrElementVisitor(val builtIns: KotlinBuiltIns, val reportError: Repor
         }
     }
 
+    private fun IrSymbol.ensureBound(expression: IrExpression) {
+        if (!this.isBound) {
+            reportError(expression, "Unbound symbol ${this}")
+        }
+    }
+
     override fun <T> visitConst(expression: IrConst<T>) {
         super.visitConst(expression)
 
@@ -110,6 +120,8 @@ class CheckIrElementVisitor(val builtIns: KotlinBuiltIns, val reportError: Repor
         } else {
             expression.ensureTypeIs(returnType)
         }
+
+        expression.superQualifierSymbol?.ensureBound(expression)
     }
 
     override fun visitDelegatingConstructorCall(expression: IrDelegatingConstructorCall) {
@@ -128,6 +140,7 @@ class CheckIrElementVisitor(val builtIns: KotlinBuiltIns, val reportError: Repor
         super.visitInstanceInitializerCall(expression)
 
         expression.ensureTypeIs(builtIns.unitType)
+        expression.classSymbol.ensureBound(expression)
     }
 
     override fun visitTypeOperator(expression: IrTypeOperatorCall) {
@@ -173,6 +186,7 @@ class CheckIrElementVisitor(val builtIns: KotlinBuiltIns, val reportError: Repor
         super.visitReturn(expression)
 
         expression.ensureTypeIs(builtIns.nothingType)
+        expression.returnTargetSymbol.ensureBound(expression)
     }
 
     override fun visitThrow(expression: IrThrow) {
@@ -180,4 +194,60 @@ class CheckIrElementVisitor(val builtIns: KotlinBuiltIns, val reportError: Repor
 
         expression.ensureTypeIs(builtIns.nothingType)
     }
+
+    override fun visitClass(declaration: IrClass) {
+        super.visitClass(declaration)
+
+        if (declaration.descriptor.kind != ClassKind.ANNOTATION_CLASS) {
+            // Check that all functions and properties from memberScope are present in IR
+            // (including FAKE_OVERRIDE ones).
+
+            val allDescriptors = declaration.descriptor.unsubstitutedMemberScope
+                    .getContributedDescriptors().filterIsInstance<CallableMemberDescriptor>()
+
+            val presentDescriptors = declaration.declarations.map { it.descriptor }
+
+            val missingDescriptors = allDescriptors - presentDescriptors
+
+            if (missingDescriptors.isNotEmpty()) {
+                reportError(declaration, "Missing declarations for descriptors:\n" +
+                        missingDescriptors.joinToString("\n"))
+            }
+        }
+    }
+
+    override fun visitDeclarationReference(expression: IrDeclarationReference) {
+        super.visitDeclarationReference(expression)
+
+        expression.symbol.ensureBound(expression)
+    }
+
+    override fun visitFunctionAccess(expression: IrFunctionAccessExpression) {
+        super.visitFunctionAccess(expression)
+
+        expression.symbol.ensureBound(expression)
+    }
+
+    override fun visitFunctionReference(expression: IrFunctionReference) {
+        super.visitFunctionReference(expression)
+
+        expression.symbol.ensureBound(expression)
+    }
+
+    override fun visitPropertyReference(expression: IrPropertyReference) {
+        super.visitPropertyReference(expression)
+
+        expression.field?.ensureBound(expression)
+        expression.getter?.ensureBound(expression)
+        expression.setter?.ensureBound(expression)
+    }
+
+    override fun visitLocalDelegatedPropertyReference(expression: IrLocalDelegatedPropertyReference) {
+        super.visitLocalDelegatedPropertyReference(expression)
+
+        expression.delegate.ensureBound(expression)
+        expression.getter.ensureBound(expression)
+        expression.setter?.ensureBound(expression)
+    }
+
 }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/common/DeepCopyIrTreeWithDeclarations.kt

@@ -16,54 +16,18 @@
 
 package org.jetbrains.kotlin.backend.common
 
-import org.jetbrains.kotlin.backend.konan.ir.IrReturnableBlock
-import org.jetbrains.kotlin.backend.konan.ir.IrReturnableBlockImpl
-import org.jetbrains.kotlin.descriptors.*
+import org.jetbrains.kotlin.backend.konan.ir.DeepCopyKonanIrTreeWithSymbols
+import org.jetbrains.kotlin.descriptors.VariableDescriptor
 import org.jetbrains.kotlin.descriptors.impl.LocalVariableDescriptor
 import org.jetbrains.kotlin.ir.IrElement
-import org.jetbrains.kotlin.ir.IrStatement
-import org.jetbrains.kotlin.ir.declarations.IrVariable
-import org.jetbrains.kotlin.ir.declarations.impl.IrVariableImpl
-import org.jetbrains.kotlin.ir.expressions.*
-import org.jetbrains.kotlin.ir.expressions.impl.IrGetValueImpl
-import org.jetbrains.kotlin.ir.expressions.impl.IrSetVariableImpl
-import org.jetbrains.kotlin.ir.symbols.IrVariableSymbol
-import org.jetbrains.kotlin.ir.symbols.impl.IrVariableSymbolImpl
-import org.jetbrains.kotlin.ir.util.DeepCopyIrTree
-import org.jetbrains.kotlin.ir.util.DeepCopyIrTreeWithSymbols
+import org.jetbrains.kotlin.ir.expressions.IrLoop
 import org.jetbrains.kotlin.ir.util.DeepCopySymbolsRemapper
-import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
+import org.jetbrains.kotlin.ir.util.DescriptorsRemapper
 import org.jetbrains.kotlin.ir.visitors.acceptVoid
 
-/**
- * Copies IR tree with descriptors of all declarations inside;
- * updates the references to these declarations.
- */
-@Deprecated("Creates unbound symbols")
-open class DeepCopyIrTreeWithDeclarations : DeepCopyIrTree() {
-
-    private fun DeclarationDescriptor.notSupported(): Nothing = TODO("${this}")
-
-    override fun mapModuleDescriptor(descriptor: ModuleDescriptor) = descriptor.notSupported()
-    override fun mapPackageFragmentDescriptor(descriptor: PackageFragmentDescriptor) = descriptor.notSupported()
-    override fun mapClassDeclaration(descriptor: ClassDescriptor) = descriptor.notSupported()
-    override fun mapTypeAliasDeclaration(descriptor: TypeAliasDescriptor) = descriptor.notSupported()
-    override fun mapFunctionDeclaration(descriptor: FunctionDescriptor) = descriptor.notSupported()
-    override fun mapConstructorDeclaration(descriptor: ClassConstructorDescriptor) = descriptor.notSupported()
-    override fun mapPropertyDeclaration(descriptor: PropertyDescriptor) = descriptor.notSupported()
-    override fun mapLocalPropertyDeclaration(descriptor: VariableDescriptorWithAccessors) = descriptor.notSupported()
-    override fun mapEnumEntryDeclaration(descriptor: ClassDescriptor) = descriptor.notSupported()
-
-    val copiedVariables = mutableMapOf<VariableDescriptor, VariableDescriptor>()
-
-    override fun mapVariableDeclaration(descriptor: VariableDescriptor): VariableDescriptor {
-        // TODO: how to ensure that the variable is not visible from outside of the transformed IR?
-
-        if (descriptor is VariableDescriptorWithAccessors && (descriptor.getter != null || descriptor.setter != null)) {
-            TODO("$descriptor with accessors")
-        }
-
-        val newDescriptor = LocalVariableDescriptor(
+fun IrElement.deepCopyWithVariablesImpl(): IrElement {
+    val descriptorsRemapper = object : DescriptorsRemapper {
+        override fun remapDeclaredVariable(descriptor: VariableDescriptor) = LocalVariableDescriptor(
                 /* containingDeclaration = */ descriptor.containingDeclaration,
                 /* annotations = */ descriptor.annotations,
                 /* name = */ descriptor.name,
@@ -72,103 +36,19 @@ open class DeepCopyIrTreeWithDeclarations : DeepCopyIrTree() {
                 /* isDelegated = */ false,
                 /* source = */ descriptor.source
         )
-
-        assert (descriptor !in copiedVariables)
-        copiedVariables[descriptor] = newDescriptor
-
-        return newDescriptor
     }
 
-    // Note: the reference to a variable can be traversed only after the declaration of that variable,
-    // so it is correct to map only references whose descriptors have copies.
-    // However such approach can be incorrect when copying functions, classes etc.
+    val symbolsRemapper = DeepCopySymbolsRemapper(descriptorsRemapper)
+    acceptVoid(symbolsRemapper)
 
-    override fun mapValueReference(descriptor: ValueDescriptor) =
-            copiedVariables[descriptor] ?: descriptor
-
-    override fun mapVariableReference(descriptor: VariableDescriptor) =
-            copiedVariables[descriptor] ?: descriptor
-
-    override fun visitBlock(expression: IrBlock): IrBlock {
-        return if (expression is IrReturnableBlock) {
-            IrReturnableBlockImpl(
-                    startOffset = expression.startOffset,
-                    endOffset   = expression.endOffset,
-                    type        = expression.type,
-                    descriptor  = expression.descriptor,
-                    origin      = mapStatementOrigin(expression.origin),
-                    statements  = expression.statements.map { it.transform(this, null) }
-            )
-        } else {
-            super.visitBlock(expression)
-        }
-    }
-
-    override fun getNonTransformedLoop(irLoop: IrLoop): IrLoop {
-        return irLoop
-    }
-}
-
-fun IrElement.deepCopyWithVariablesImpl(): IrElement {
-    // FIXME: support non-transformed loops
-
-    val remapper = DeepCopySymbolsRemapper()
-    acceptVoid(remapper)
-
-    val variableDescriptorReplacer = object : IrElementTransformerVoid() {
-
-        val copiedVariables = mutableMapOf<IrVariableSymbol, IrVariableSymbol>()
-
-        override fun visitVariable(declaration: IrVariable): IrStatement {
-            declaration.transformChildrenVoid()
-
-            val descriptor = declaration.descriptor
-            val newDescriptor = LocalVariableDescriptor(
-                    /* containingDeclaration = */ descriptor.containingDeclaration,
-                    /* annotations = */ descriptor.annotations,
-                    /* name = */ descriptor.name,
-                    /* type = */ descriptor.type,
-                    /* mutable = */ descriptor.isVar,
-                    /* isDelegated = */ false,
-                    /* source = */ descriptor.source
-            )
-            val newSymbol = IrVariableSymbolImpl(newDescriptor)
-            copiedVariables[declaration.symbol] = newSymbol
-
-            return with(declaration) {
-                IrVariableImpl(startOffset, endOffset, origin, newSymbol).also {
-                    it.initializer = initializer
+    return this.transform(
+            object : DeepCopyKonanIrTreeWithSymbols(symbolsRemapper) {
+                override fun getNonTransformedLoop(irLoop: IrLoop): IrLoop {
+                    return irLoop
                 }
-            }
-
-        }
-
-        override fun visitValueAccess(expression: IrValueAccessExpression): IrExpression {
-            assert(expression.symbol !in copiedVariables)
-            return super.visitValueAccess(expression)
-        }
-
-        override fun visitGetValue(expression: IrGetValue): IrExpression {
-            val newSymbol = copiedVariables[expression.symbol] ?: return super.visitGetValue(expression)
-
-            expression.transformChildrenVoid()
-            return with(expression) {
-                IrGetValueImpl(startOffset, endOffset, newSymbol, origin)
-            }
-        }
-
-        override fun visitSetVariable(expression: IrSetVariable): IrExpression {
-            val newSymbol = copiedVariables[expression.symbol] ?: return super.visitSetVariable(expression)
-
-            expression.transformChildrenVoid()
-            return with(expression) {
-                IrSetVariableImpl(startOffset, endOffset, newSymbol, value, origin)
-            }
-        }
-
-    }
-
-    return this.transform(DeepCopyIrTreeWithSymbols(remapper), null).transform(variableDescriptorReplacer, null)
+            },
+            null
+    )
 }
 
 inline fun <reified T : IrElement> T.deepCopyWithVariables(): T =

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/common/DeepCopyIrTreeWithDescriptoros.kt

@@ -86,9 +86,7 @@ internal class DeepCopyIrTreeWithDescriptors(val targetDescriptor: DeclarationDe
             val contributedDescriptors = oldDescriptor.unsubstitutedMemberScope
                     .getContributedDescriptors()
                     .map {
-                        if (it is CallableMemberDescriptor && it.kind == CallableMemberDescriptor.Kind.FAKE_OVERRIDE)
-                            it
-                        else descriptorSubstituteMap[it]!!
+                        descriptorSubstituteMap[it]!!
                     }
             newDescriptor.initialize(
                     SimpleMemberScope(contributedDescriptors),

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/common/IrValidator.kt

@@ -16,21 +16,12 @@
 
 package org.jetbrains.kotlin.backend.common
 
-import org.jetbrains.kotlin.descriptors.*
-import org.jetbrains.kotlin.descriptors.impl.TypeAliasConstructorDescriptor
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.declarations.*
-import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.util.render
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
 import org.jetbrains.kotlin.ir.visitors.acceptChildrenVoid
 import org.jetbrains.kotlin.ir.visitors.acceptVoid
-import org.jetbrains.kotlin.resolve.descriptorUtil.module
-
-fun validateIrFunction(context: BackendContext, irFunction: IrFunction) {
-    val visitor = IrValidator(context, false)
-    irFunction.acceptVoid(visitor)
-}
 
 fun validateIrFile(context: BackendContext, irFile: IrFile) {
     val visitor = IrValidator(context, false)
@@ -41,51 +32,7 @@ fun validateIrModule(context: BackendContext, irModule: IrModuleFragment) {
     val visitor = IrValidator(context, true) // TODO: consider taking the boolean from settings.
     irModule.acceptVoid(visitor)
 
-    // TODO: investigate and re-enable
-    val ENABLE_EXTENDED_VALIDATION = false
-    if (!ENABLE_EXTENDED_VALIDATION) {
-        return
-    }
-
-    val moduleDeclarations = visitor.foundDeclarations
-
-    irModule.acceptVoid(object : IrElementVisitorVoid {
-        lateinit var currentFile: IrFile
-
-        override fun visitFile(declaration: IrFile) {
-            currentFile = declaration
-            declaration.acceptChildrenVoid(this)
-        }
-
-        override fun visitElement(element: IrElement) {
-            element.acceptChildrenVoid(this)
-        }
-
-        override fun visitProperty(declaration: IrProperty) {
-            if (declaration.descriptor.modality == Modality.ABSTRACT) {
-                return // Workaround TODO
-            }
-
-            declaration.acceptChildrenVoid(this)
-        }
-
-        override fun visitDeclarationReference(expression: IrDeclarationReference) {
-            expression.acceptChildrenVoid(this)
-
-            val declarationDescriptor = expression.irDeclarationDescriptor ?: return
-
-            val declarationModule = declarationDescriptor.module
-
-            if (declarationModule == irModule.descriptor && !moduleDeclarations.hasTarget(expression)) {
-                context.reportIrValidationError(
-                        "declaration $declarationDescriptor is missing;\n" +
-                                "references from:\n" +
-                                expression.render(),
-
-                        currentFile, expression)
-            }
-        }
-    })
+    // TODO: also check that all referenced symbol targets are reachable.
 }
 
 private fun BackendContext.reportIrValidationError(message: String, irFile: IrFile, irElement: IrElement) {
@@ -98,86 +45,8 @@ private fun BackendContext.reportIrValidationError(message: String, irFile: IrFi
     // TODO: throw an exception after fixing bugs leading to invalid IR.
 }
 
-/**
- * Descriptor to be found in IR element declaring target of this reference,
- * or `null` if it is not supported yet.
- */
-private val IrDeclarationReference.irDeclarationDescriptor: DeclarationDescriptor?
-    get() {
-        when (this) {
-            is IrFieldAccessExpression -> return this.descriptor.original
-
-            is IrMemberAccessExpression -> {
-                val original = this.descriptor.original
-                if (original is CallableMemberDescriptor && !original.kind.isReal) {
-                    return null
-                }
-
-                if (original is TypeAliasConstructorDescriptor) {
-                    return original.underlyingConstructorDescriptor
-                }
-
-                return original
-            }
-
-            is IrGetValue -> {
-                if (this.descriptor is ParameterDescriptor) {
-                    return null
-                }
-
-                return this.descriptor
-            }
-
-            else -> return this.descriptor
-        }
-    }
-
-private val IrDeclarationReference.declarationKind: IrDeclarationKind
-    get() = when (this) {
-        is IrClassReference, is IrGetObjectValue -> IrDeclarationKind.CLASS
-        is IrFieldAccessExpression -> IrDeclarationKind.FIELD
-        is IrGetEnumValue -> IrDeclarationKind.ENUM_ENTRY
-        is IrValueAccessExpression -> IrDeclarationKind.VARIABLE
-        is IrMemberAccessExpression -> when (this.descriptor) {
-            is ConstructorDescriptor -> IrDeclarationKind.CONSTRUCTOR
-            is PropertyDescriptor -> IrDeclarationKind.PROPERTY
-            is VariableDescriptorWithAccessors -> IrDeclarationKind.LOCAL_PROPERTY
-            else -> IrDeclarationKind.FUNCTION
-        }
-        else -> TODO()
-    }
-
-/**
- * The collection of IR declarations.
- */
-private class Declarations {
-    private data class DeclarationKey(val descriptor: DeclarationDescriptor, val kind: IrDeclarationKind)
-
-    private val declarations = mutableSetOf<DeclarationKey>()
-
-    private fun createKey(declaration: IrDeclaration) =
-            DeclarationKey(declaration.descriptor, declaration.declarationKind)
-
-    fun add(declaration: IrDeclaration) {
-        declarations.add(createKey(declaration))
-    }
-
-    fun isAlreadyDeclared(declaration: IrDeclaration): Boolean {
-        return createKey(declaration) in declarations
-    }
-
-    fun hasTarget(reference: IrDeclarationReference): Boolean {
-        val descriptor = reference.irDeclarationDescriptor ?: return false
-        val kind = reference.declarationKind
-
-        return DeclarationKey(descriptor, kind) in declarations
-    }
-}
-
 private class IrValidator(val context: BackendContext, performHeavyValidations: Boolean) : IrElementVisitorVoid {
 
-    val foundDeclarations = Declarations()
-
     val builtIns = context.builtIns
     lateinit var currentFile: IrFile
 
@@ -200,25 +69,4 @@ private class IrValidator(val context: BackendContext, performHeavyValidations:
         element.acceptVoid(elementChecker)
         element.acceptChildrenVoid(this)
     }
-
-    private fun recordDeclaration(declaration: IrDeclaration) {
-        if (foundDeclarations.isAlreadyDeclared(declaration)) {
-            if (declaration !is IrValueParameter && declaration !is IrTypeParameter) {
-                // TODO: remove the check.
-                error(declaration, "redeclaration")
-            }
-        } else {
-            foundDeclarations.add(declaration)
-        }
-    }
-
-    override fun visitDeclaration(declaration: IrDeclaration) {
-        recordDeclaration(declaration)
-        super.visitDeclaration(declaration)
-    }
-
-    override fun visitAnonymousInitializer(declaration: IrAnonymousInitializer) {
-        // Do not treat anonymous initializers as declarations, because they are not unique.
-        super.visitDeclaration(declaration)
-    }
 }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/common/descriptors/DescriptorUtils.kt

@@ -58,20 +58,6 @@ internal val CallableDescriptor.explicitParameters: List<ParameterDescriptor>
         return result
     }
 
-/**
- * Returns the parameter in the original function corresponding to given parameter of this function.
- *
- * Note: `parameter.original` doesn't seem to be always the parameter of `this.original`.
- *
- * @param parameter must be declared in this function
- */
-fun CallableDescriptor.getOriginalParameter(parameter: ParameterDescriptor): ParameterDescriptor = when (parameter) {
-    is ValueParameterDescriptor -> this.original.valueParameters[parameter.index]
-    this.dispatchReceiverParameter -> this.original.dispatchReceiverParameter!!
-    this.extensionReceiverParameter -> this.original.extensionReceiverParameter!!
-    else -> TODO("$parameter in $this")
-}
-
 fun KotlinType.replace(types: List<KotlinType>) = this.replace(types.map(::TypeProjectionImpl))
 
 fun FunctionDescriptor.substitute(vararg types: KotlinType): FunctionDescriptor {
@@ -83,6 +69,13 @@ fun FunctionDescriptor.substitute(vararg types: KotlinType): FunctionDescriptor
     return substitute(typeSubstitutor)!!
 }
 
+fun FunctionDescriptor.substitute(typeArguments: Map<TypeParameterDescriptor, KotlinType>): FunctionDescriptor {
+    val typeSubstitutor = TypeSubstitutor.create(
+            typeParameters.associateBy({ it.typeConstructor }, { TypeProjectionImpl(typeArguments[it]!!) })
+    )
+    return substitute(typeSubstitutor)!!
+}
+
 fun ClassDescriptor.getFunction(name: String, types: List<KotlinType>): FunctionDescriptor {
     val typeSubstitutor = TypeSubstitutor.create(
             declaredTypeParameters

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/common/lower/LowerUtils.kt

@@ -26,7 +26,6 @@ import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.declarations.*
-import org.jetbrains.kotlin.ir.declarations.impl.IrVariableImpl
 import org.jetbrains.kotlin.ir.expressions.IrDelegatingConstructorCall
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.IrStatementOrigin
@@ -48,39 +47,16 @@ import org.jetbrains.kotlin.utils.Printer
 
 class IrLoweringContext(backendContext: BackendContext) : IrGeneratorContext(backendContext.irBuiltIns)
 
-class DeclarationIrBuilder : IrBuilderWithScope {
-
-    constructor(
-            backendContext: BackendContext,
-            symbol: IrSymbol,
-            startOffset: Int = UNDEFINED_OFFSET,
-            endOffset: Int = UNDEFINED_OFFSET
-    ) : super(
-            IrLoweringContext(backendContext),
-            Scope(symbol),
-            startOffset,
-            endOffset
-    )
-
-    @Deprecated("Creates unbound symbol")
-    constructor(
-            backendContext: BackendContext,
-            declarationDescriptor: DeclarationDescriptor,
-            startOffset: Int = UNDEFINED_OFFSET,
-            endOffset: Int = UNDEFINED_OFFSET
-    ) : super(
-            IrLoweringContext(backendContext),
-            Scope(declarationDescriptor),
-            startOffset,
-            endOffset
-    )
-}
-
-@Deprecated("Creates unbound symbol")
-fun BackendContext.createIrBuilder(declarationDescriptor: DeclarationDescriptor,
-                                   startOffset: Int = UNDEFINED_OFFSET,
-                                   endOffset: Int = UNDEFINED_OFFSET) =
-        DeclarationIrBuilder(this, declarationDescriptor, startOffset, endOffset)
+class DeclarationIrBuilder(
+        backendContext: BackendContext,
+        symbol: IrSymbol,
+        startOffset: Int = UNDEFINED_OFFSET, endOffset: Int = UNDEFINED_OFFSET
+) : IrBuilderWithScope(
+        IrLoweringContext(backendContext),
+        Scope(symbol),
+        startOffset,
+        endOffset
+)
 
 fun BackendContext.createIrBuilder(symbol: IrSymbol,
                                    startOffset: Int = UNDEFINED_OFFSET,
@@ -101,25 +77,9 @@ inline fun IrGeneratorWithScope.irBlock(expression: IrExpression, origin: IrStat
 inline fun IrGeneratorWithScope.irBlockBody(irElement: IrElement, body: IrBlockBodyBuilder.() -> Unit) =
         this.irBlockBody(irElement.startOffset, irElement.endOffset, body)
 
-
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irUnit() =
-        IrGetObjectValueImpl(startOffset, endOffset, context.builtIns.unitType, context.builtIns.unit)
-
 fun IrBuilderWithScope.irIfThen(condition: IrExpression, thenPart: IrExpression) =
         IrIfThenElseImpl(startOffset, endOffset, context.builtIns.unitType, condition, thenPart, null)
 
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irGet(descriptor: PropertyDescriptor) =
-        IrCallImpl(startOffset, endOffset, descriptor.getter!!)
-
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irSet(receiver: IrExpression, descriptor: PropertyDescriptor, arg: IrExpression) =
-        IrCallImpl(startOffset, endOffset, descriptor.setter!!).apply {
-            dispatchReceiver = receiver
-            putValueArgument(0, arg)
-        }
-
 fun IrBuilderWithScope.irNot(arg: IrExpression) =
         primitiveOp1(startOffset, endOffset, context.irBuiltIns.booleanNotSymbol, IrStatementOrigin.EXCL, arg)
 
@@ -139,30 +99,21 @@ fun IrBuilderWithScope.irImplicitCoercionToUnit(arg: IrExpression) =
         IrTypeOperatorCallImpl(startOffset, endOffset, context.builtIns.unitType,
                 IrTypeOperator.IMPLICIT_COERCION_TO_UNIT, context.builtIns.unitType, arg)
 
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irGetField(receiver: IrExpression, descriptor: PropertyDescriptor) =
-        IrGetFieldImpl(startOffset, endOffset, descriptor, receiver)
-
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irSetField(receiver: IrExpression, descriptor: PropertyDescriptor, value: IrExpression) =
-        IrSetFieldImpl(startOffset, endOffset, descriptor, receiver, value)
-
 fun IrBuilderWithScope.irGetField(receiver: IrExpression, symbol: IrFieldSymbol) =
         IrGetFieldImpl(startOffset, endOffset, symbol, receiver)
 
 fun IrBuilderWithScope.irSetField(receiver: IrExpression, symbol: IrFieldSymbol, value: IrExpression) =
         IrSetFieldImpl(startOffset, endOffset, symbol, receiver, value)
 
-@Deprecated("Creates unbound symbol")
 open class IrBuildingTransformer(private val context: BackendContext) : IrElementTransformerVoid() {
     private var currentBuilder: IrBuilderWithScope? = null
 
     protected val builder: IrBuilderWithScope
         get() = currentBuilder!!
 
-    private inline fun <T> withBuilder(declarationDescriptor: DeclarationDescriptor, block: () -> T): T {
+    private inline fun <T> withBuilder(symbol: IrSymbol, block: () -> T): T {
         val oldBuilder = currentBuilder
-        currentBuilder = context.createIrBuilder(declarationDescriptor)
+        currentBuilder = context.createIrBuilder(symbol)
         return try {
             block()
         } finally {
@@ -171,20 +122,20 @@ open class IrBuildingTransformer(private val context: BackendContext) : IrElemen
     }
 
     override fun visitFunction(declaration: IrFunction): IrStatement {
-        withBuilder(declaration.descriptor) {
+        withBuilder(declaration.symbol) {
             return super.visitFunction(declaration)
         }
     }
 
     override fun visitField(declaration: IrField): IrStatement {
-        withBuilder(declaration.descriptor) {
+        withBuilder(declaration.symbol) {
             // Transforms initializer:
             return super.visitField(declaration)
         }
     }
 
     override fun visitAnonymousInitializer(declaration: IrAnonymousInitializer): IrStatement {
-        withBuilder(declaration.descriptor) {
+        withBuilder(declaration.symbol) {
             return super.visitAnonymousInitializer(declaration)
         }
     }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/common/lower/TailrecLowering.kt

@@ -33,7 +33,7 @@ import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
  * This pass lowers tail recursion calls in `tailrec` functions.
  *
  * Note: it currently can't handle local functions and classes declared in default arguments.
- * See [DeepCopyIrTreeWithDeclarations].
+ * See [deepCopyWithVariables].
  */
 internal class TailrecLowering(val context: BackendContext) : FunctionLoweringPass {
     override fun lower(irFunction: IrFunction) {

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EnumSpecialDescriptorsFactory.kt

@@ -25,10 +25,7 @@ import org.jetbrains.kotlin.descriptors.impl.*
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.declarations.impl.*
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
-import org.jetbrains.kotlin.ir.util.createParameterDeclarations
-import org.jetbrains.kotlin.ir.util.endOffsetOrUndefined
-import org.jetbrains.kotlin.ir.util.functions
-import org.jetbrains.kotlin.ir.util.startOffsetOrUndefined
+import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.scopes.MemberScope
@@ -75,6 +72,7 @@ internal class EnumSpecialDeclarationsFactory(val context: Context) {
         implObjectDescriptor.initialize(memberScope, setOf(constructorDescriptor), constructorDescriptor)
         val implObject = IrClassImpl(startOffset, endOffset, IrDeclarationOrigin.DEFINED, implObjectDescriptor).apply {
             createParameterDeclarations()
+            addFakeOverrides()
         }
 
         val (itemGetterSymbol, itemGetterDescriptor) = getEnumItemGetter(enumClassDescriptor)

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/InteropUtils.kt

@@ -16,17 +16,12 @@
 
 package org.jetbrains.kotlin.backend.konan
 
-import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.scopes.MemberScope
-import org.jetbrains.kotlin.types.KotlinType
-import org.jetbrains.kotlin.types.StarProjectionImpl
 import org.jetbrains.kotlin.types.TypeUtils
-import org.jetbrains.kotlin.types.replace
-import org.jetbrains.kotlin.types.typeUtil.isSubtypeOf
 
 private val cPointerName = "CPointer"
 private val nativePointedName = "NativePointed"
@@ -67,53 +62,12 @@ internal class InteropBuiltIns(builtIns: KonanBuiltIns) {
                 TypeUtils.getClassDescriptor(extensionReceiverParameter.type) == nativePointed
     }
 
-    val memberAt = packageScope.getContributedFunctions("memberAt").single()
-
     val interpretNullablePointed = packageScope.getContributedFunctions("interpretNullablePointed").single()
 
     val interpretCPointer = packageScope.getContributedFunctions("interpretCPointer").single()
 
-    val variableClass = packageScope.getContributedClassifier("CVariable") as ClassDescriptor
-
-    val arrayGetByIntIndex = packageScope.getContributedFunctions("get").single {
-        KotlinBuiltIns.isInt(it.valueParameters.single().type) &&
-                it.typeParameters.single().upperBounds.single() == variableClass.defaultType
-    }
-
-    val arrayGetByLongIndex = packageScope.getContributedFunctions("get").single {
-        KotlinBuiltIns.isLong(it.valueParameters.single().type) &&
-                it.typeParameters.single().upperBounds.single() == variableClass.defaultType
-    }
-
-    val allocUninitializedArrayWithIntLength = packageScope.getContributedFunctions("allocArray").single {
-        it.valueParameters.size == 1 && KotlinBuiltIns.isInt(it.valueParameters[0].type)
-    }
-
-    val allocUninitializedArrayWithLongLength = packageScope.getContributedFunctions("allocArray").single {
-        it.valueParameters.size == 1 && KotlinBuiltIns.isLong(it.valueParameters[0].type)
-    }
-
-    val allocVariable = packageScope.getContributedFunctions("alloc").single {
-        it.valueParameters.size == 0
-    }
-
-    val readValue = packageScope.getContributedFunctions("readValue").single {
-        it.valueParameters.size == 0
-    }
-
-    val readValueBySizeAndAlign = packageScope.getContributedFunctions("readValue").single {
-        it.valueParameters.size == 2
-    }
-
     val typeOf = packageScope.getContributedFunctions("typeOf").single()
 
-    val variableTypeClass =
-            variableClass.unsubstitutedInnerClassesScope.getContributedClassifier("Type") as ClassDescriptor
-
-    val variableTypeSize = variableTypeClass.unsubstitutedMemberScope.getContributedVariables("size").single()
-
-    val variableTypeAlign = variableTypeClass.unsubstitutedMemberScope.getContributedVariables("align").single()
-
     val nativeMemUtils = packageScope.getContributedClassifier("nativeMemUtils") as ClassDescriptor
 
     private val primitives = listOf(

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanLower.kt

@@ -19,13 +19,11 @@ package org.jetbrains.kotlin.backend.konan
 import org.jetbrains.kotlin.backend.common.runOnFilePostfix
 import org.jetbrains.kotlin.backend.common.lower.*
 import org.jetbrains.kotlin.backend.common.validateIrFile
+import org.jetbrains.kotlin.backend.common.validateIrModule
 import org.jetbrains.kotlin.backend.konan.lower.*
-import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
-import org.jetbrains.kotlin.ir.util.IrSymbolBindingChecker
 import org.jetbrains.kotlin.ir.util.replaceUnboundSymbols
-import org.jetbrains.kotlin.ir.visitors.acceptVoid
 
 internal class KonanLower(val context: Context) {
 
@@ -49,9 +47,14 @@ internal class KonanLower(val context: Context) {
         // Inlining must be run before other phases.
         phaser.phase(KonanPhase.LOWER_INLINE) {
             FunctionInlining(context).inline(irModule)
-            irModule.replaceUnboundSymbols(context)
-            irModule.checkSymbolsBound()
         }
+
+        phaser.phase(KonanPhase.LOWER_INTEROP_PART1) {
+            irModule.files.forEach(InteropLoweringPart1(context)::lower)
+        }
+
+        irModule.replaceUnboundSymbols(context)
+        validateIrModule(context, irModule)
     }
 
     fun lowerFile(irFile: IrFile) {
@@ -59,31 +62,24 @@ internal class KonanLower(val context: Context) {
 
         phaser.phase(KonanPhase.LOWER_STRING_CONCAT) {
             StringConcatenationLowering(context).lower(irFile)
-            irFile.checkSymbolsBound()
         }
         phaser.phase(KonanPhase.LOWER_ENUMS) {
             EnumClassLowering(context).run(irFile)
-            irFile.checkSymbolsBound()
         }
         phaser.phase(KonanPhase.LOWER_INITIALIZERS) {
             InitializersLowering(context).runOnFilePostfix(irFile)
-            irFile.checkSymbolsBound()
         }
         phaser.phase(KonanPhase.LOWER_SHARED_VARIABLES) {
             SharedVariablesLowering(context).runOnFilePostfix(irFile)
-            irFile.checkSymbolsBound()
         }
         phaser.phase(KonanPhase.LOWER_DELEGATION) {
             PropertyDelegationLowering(context).lower(irFile)
-            irFile.checkSymbolsBound()
         }
         phaser.phase(KonanPhase.LOWER_LOCAL_FUNCTIONS) {
             LocalDeclarationsLowering(context).runOnFilePostfix(irFile)
-            irFile.checkSymbolsBound()
         }
         phaser.phase(KonanPhase.LOWER_TAILREC) {
             TailrecLowering(context).runOnFilePostfix(irFile)
-            irFile.checkSymbolsBound()
         }
         phaser.phase(KonanPhase.LOWER_FINALLY) {
             FinallyBlocksLowering(context).runOnFilePostfix(irFile)
@@ -101,8 +97,8 @@ internal class KonanLower(val context: Context) {
         phaser.phase(KonanPhase.LOWER_INNER_CLASSES) {
             InnerClassLowering(context).runOnFilePostfix(irFile)
         }
-        phaser.phase(KonanPhase.LOWER_INTEROP) {
-            InteropLowering(context).lower(irFile)
+        phaser.phase(KonanPhase.LOWER_INTEROP_PART2) {
+            InteropLoweringPart2(context).lower(irFile)
         }
         phaser.phase(KonanPhase.LOWER_CALLABLES) {
             CallableReferenceLowering(context).runOnFilePostfix(irFile)
@@ -118,7 +114,6 @@ internal class KonanLower(val context: Context) {
         }
         phaser.phase(KonanPhase.BRIDGES_BUILDING) {
             BridgesBuilding(context).runOnFilePostfix(irFile)
-            DirectBridgesCallsLowering(context).runOnFilePostfix(irFile)
         }
         phaser.phase(KonanPhase.AUTOBOX) {
             validateIrFile(context, irFile)
@@ -126,9 +121,4 @@ internal class KonanLower(val context: Context) {
         }
     }
 
-    private fun IrElement.checkSymbolsBound() {
-        if (context.shouldVerifyIr()) {
-            this.acceptVoid(IrSymbolBindingChecker())
-        }
-    }
 }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanPhases.kt

@@ -30,13 +30,14 @@ enum class KonanPhase(val description: String,
     /* ... ... */ LOWER_INLINE_CONSTRUCTORS("Inline constructors transformation"),
     /* ... ... */ LOWER_INLINE("Functions inlining", LOWER_INLINE_CONSTRUCTORS),
     /* ... ... ...  */ DESERIALIZER("Deserialize inline bodies"),
+    /* ... ... */ LOWER_INTEROP_PART1("Interop lowering, part 1", LOWER_INLINE),
     /* ... ... */ LOWER_ENUMS("Enum classes lowering"),
     /* ... ... */ LOWER_DELEGATION("Delegation lowering"),
     /* ... ... */ LOWER_INITIALIZERS("Initializers lowering", LOWER_ENUMS),
     /* ... ... */ LOWER_SHARED_VARIABLES("Shared Variable Lowering", LOWER_INITIALIZERS),
     /* ... ... */ LOWER_LOCAL_FUNCTIONS("Local Function Lowering", LOWER_SHARED_VARIABLES),
-    /* ... ... */ LOWER_INTEROP("Interop lowering", LOWER_LOCAL_FUNCTIONS),
-    /* ... ... */ LOWER_CALLABLES("Callable references Lowering", LOWER_INTEROP, LOWER_DELEGATION, LOWER_LOCAL_FUNCTIONS),
+    /* ... ... */ LOWER_INTEROP_PART2("Interop lowering, part 2", LOWER_LOCAL_FUNCTIONS),
+    /* ... ... */ LOWER_CALLABLES("Callable references Lowering", LOWER_INTEROP_PART2, LOWER_DELEGATION, LOWER_LOCAL_FUNCTIONS),
     /* ... ... */ LOWER_VARARG("Vararg lowering", LOWER_CALLABLES),
     /* ... ... */ LOWER_TAILREC("tailrec lowering", LOWER_LOCAL_FUNCTIONS),
     /* ... ... */ LOWER_FINALLY("Finally blocks lowering", LOWER_INITIALIZERS, LOWER_LOCAL_FUNCTIONS, LOWER_TAILREC),

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/Ir.kt

@@ -18,23 +18,29 @@ package org.jetbrains.kotlin.backend.konan.ir
 
 import org.jetbrains.kotlin.backend.konan.Context
 import org.jetbrains.kotlin.backend.konan.KonanBuiltIns
+import org.jetbrains.kotlin.backend.konan.ValueType
 import org.jetbrains.kotlin.backend.konan.descriptors.getKonanInternalClass
 import org.jetbrains.kotlin.backend.konan.descriptors.getKonanInternalFunctions
+import org.jetbrains.kotlin.backend.konan.descriptors.konanInternal
+import org.jetbrains.kotlin.backend.konan.util.atMostOne
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
+import org.jetbrains.kotlin.builtins.PrimitiveType
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.descriptors.PropertyDescriptor
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
+import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
-import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi2ir.generators.SymbolTable
+import org.jetbrains.kotlin.util.OperatorNameConventions
 
 // This is what Context collects about IR.
 internal class Ir(val context: Context, val irModule: IrModuleFragment) {
     val propertiesWithBackingFields = mutableSetOf<PropertyDescriptor>()
 
-    val defaultParameterDescriptorsCache = mutableMapOf<FunctionDescriptor, FunctionDescriptor>()
+    val defaultParameterDeclarationsCache = mutableMapOf<FunctionDescriptor, IrFunction>()
 
     val originalModuleIndex = ModuleIndex(irModule)
 
@@ -67,13 +73,31 @@ internal class Symbols(val context: Context, val symbolTable: SymbolTable) {
     val ThrowTypeCastException = symbolTable.referenceSimpleFunction(
             builtIns.getKonanInternalFunctions("ThrowTypeCastException").single())
 
+    val ThrowUninitializedPropertyAccessException = symbolTable.referenceSimpleFunction(
+            builtIns.getKonanInternalFunctions("ThrowUninitializedPropertyAccessException").single()
+    )
+
     val stringBuilder = symbolTable.referenceClass(
             builtInsPackage("kotlin", "text").getContributedClassifier(
                     Name.identifier("StringBuilder"), NoLookupLocation.FROM_BACKEND
             ) as ClassDescriptor
     )
 
+    val defaultArgumentMarker = symbolTable.referenceClass(
+            builtIns.konanInternal.getContributedClassifier(
+                    Name.identifier("DefaultArgumentMarker"), NoLookupLocation.FROM_BACKEND
+            ) as ClassDescriptor
+    )
+
     val any = symbolTable.referenceClass(builtIns.any)
+    val unit = symbolTable.referenceClass(builtIns.unit)
+
+    val byte = symbolTable.referenceClass(builtIns.byte)
+    val short = symbolTable.referenceClass(builtIns.short)
+    val int = symbolTable.referenceClass(builtIns.int)
+    val long = symbolTable.referenceClass(builtIns.long)
+
+    val integerClasses = listOf(byte, short, int, long)
 
     val arrayOf = symbolTable.referenceSimpleFunction(
             builtInsPackage("kotlin").getContributedFunctions(
@@ -83,12 +107,86 @@ internal class Symbols(val context: Context, val symbolTable: SymbolTable) {
 
     val array = symbolTable.referenceClass(builtIns.array)
 
+    private fun primitiveArrayClass(type: PrimitiveType) =
+            symbolTable.referenceClass(builtIns.getPrimitiveArrayClassDescriptor(type))
+
+    val byteArray = primitiveArrayClass(PrimitiveType.BYTE)
+    val charArray = primitiveArrayClass(PrimitiveType.CHAR)
+    val shortArray = primitiveArrayClass(PrimitiveType.SHORT)
+    val intArray = primitiveArrayClass(PrimitiveType.INT)
+    val longArray = primitiveArrayClass(PrimitiveType.LONG)
+    val floatArray = primitiveArrayClass(PrimitiveType.FLOAT)
+    val doubleArray = primitiveArrayClass(PrimitiveType.DOUBLE)
+    val booleanArray = primitiveArrayClass(PrimitiveType.BOOLEAN)
+
+    val arrays = PrimitiveType.values().map { primitiveArrayClass(it) } + array
+
+    val copyRangeTo = arrays.map { symbol ->
+        val packageViewDescriptor = builtIns.builtInsModule.getPackage(KotlinBuiltIns.COLLECTIONS_PACKAGE_FQ_NAME)
+        val functionDescriptor = packageViewDescriptor.memberScope
+                .getContributedFunctions(Name.identifier("copyRangeTo"), NoLookupLocation.FROM_BACKEND)
+                .first {
+                    it.extensionReceiverParameter?.type?.constructor?.declarationDescriptor == symbol.descriptor
+                }
+        symbol.descriptor to symbolTable.referenceSimpleFunction(functionDescriptor)
+    }.toMap()
+
+    val intAnd = symbolTable.referenceFunction(
+            builtIns.intType.memberScope
+                    .getContributedFunctions(OperatorNameConventions.AND, NoLookupLocation.FROM_BACKEND)
+                    .single()
+    )
+
+    val intPlusInt = symbolTable.referenceFunction(
+            builtIns.intType.memberScope
+                    .getContributedFunctions(OperatorNameConventions.PLUS, NoLookupLocation.FROM_BACKEND)
+                    .single {
+                        it.valueParameters.single().type == builtIns.intType
+                    }
+    )
+
+    val boxFunctions = ValueType.values().associate {
+        val boxFunctionName = "box${it.classFqName.shortName()}"
+        it to symbolTable.referenceSimpleFunction(context.builtIns.getKonanInternalFunctions(boxFunctionName).single())
+    }
+
+    val boxClasses = ValueType.values().associate {
+        it to symbolTable.referenceClass(context.builtIns.getKonanInternalClass("${it.classFqName.shortName()}Box"))
+    }
+
+    val unboxFunctions = ValueType.values().mapNotNull {
+        val unboxFunctionName = "unbox${it.classFqName.shortName()}"
+        context.builtIns.getKonanInternalFunctions(unboxFunctionName).atMostOne()?.let { descriptor ->
+            it to symbolTable.referenceSimpleFunction(descriptor)
+        }
+    }.toMap()
+
+    val interopNativePointedGetRawPointer =
+            symbolTable.referenceSimpleFunction(context.interopBuiltIns.nativePointedGetRawPointer)
+
+    val interopCPointerGetRawValue = symbolTable.referenceSimpleFunction(context.interopBuiltIns.cPointerGetRawValue)
+
+    val getNativeNullPtr = symbolTable.referenceSimpleFunction(builtIns.getNativeNullPtr)
+
     val valuesForEnum = symbolTable.referenceSimpleFunction(
             builtIns.getKonanInternalFunctions("valuesForEnum").single())
 
     val valueOfForEnum = symbolTable.referenceSimpleFunction(
             builtIns.getKonanInternalFunctions("valueOfForEnum").single())
 
+    val getContinuation = symbolTable.referenceSimpleFunction(
+            context.builtIns.getKonanInternalFunctions("getContinuation").single())
+
+    val coroutineImpl = symbolTable.referenceClass(context.builtIns.getKonanInternalClass("CoroutineImpl"))
+
+    val coroutineSuspendedGetter = symbolTable.referenceSimpleFunction(
+            builtInsPackage("kotlin", "coroutines", "experimental", "intrinsics")
+                    .getContributedVariables(Name.identifier("COROUTINE_SUSPENDED"), NoLookupLocation.FROM_BACKEND)
+                    .single().getter!!
+    )
+
+    val kFunctionImpl = symbolTable.referenceClass(context.builtIns.getKonanInternalClass("KFunctionImpl"))
+
     val kProperty0Impl = symbolTable.referenceClass(context.reflectionTypes.kProperty0Impl)
     val kProperty1Impl = symbolTable.referenceClass(context.reflectionTypes.kProperty1Impl)
     val kProperty2Impl = symbolTable.referenceClass(context.reflectionTypes.kProperty2Impl)

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/KonanIr.kt

@@ -51,6 +51,12 @@ class IrReturnableBlockImpl(startOffset: Int, endOffset: Int, type: KotlinType,
 
     override val descriptor = symbol.descriptor
 
+    constructor(startOffset: Int, endOffset: Int, type: KotlinType,
+                symbol: IrReturnableBlockSymbol, origin: IrStatementOrigin?, statements: List<IrStatement>) :
+            this(startOffset, endOffset, type, symbol, origin) {
+        this.statements.addAll(statements)
+    }
+
     constructor(startOffset: Int, endOffset: Int, type: KotlinType,
                 descriptor: FunctionDescriptor, origin: IrStatementOrigin? = null) :
             this(startOffset, endOffset, type, IrReturnableBlockSymbolImpl(descriptor), origin)

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/KonanIrCopy.kt

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.backend.konan.ir
+
+import org.jetbrains.kotlin.ir.IrElement
+import org.jetbrains.kotlin.ir.expressions.IrBlock
+import org.jetbrains.kotlin.ir.expressions.IrReturn
+import org.jetbrains.kotlin.ir.expressions.impl.IrReturnImpl
+import org.jetbrains.kotlin.ir.util.DeepCopyIrTreeWithSymbols
+import org.jetbrains.kotlin.ir.util.SymbolRemapper
+
+internal open class DeepCopyKonanIrTreeWithSymbols(
+        private val symbolRemapper: SymbolRemapper
+) : DeepCopyIrTreeWithSymbols(symbolRemapper) {
+
+    private inline fun <reified T : IrElement> T.transform() =
+            transform(this@DeepCopyKonanIrTreeWithSymbols, null) as T
+
+    private val transformedReturnableBlocks = mutableMapOf<IrReturnableBlock, IrReturnableBlock>()
+
+    override fun visitBlock(expression: IrBlock): IrBlock = if (expression is IrReturnableBlock) {
+        IrReturnableBlockImpl(
+                expression.startOffset, expression.endOffset,
+                expression.type,
+                expression.descriptor,
+                expression.origin
+        ).also {
+            transformedReturnableBlocks.put(expression, it)
+            it.statements.addAll(expression.statements.map { it.transform() })
+        }
+    } else {
+        super.visitBlock(expression)
+    }
+
+    override fun visitReturn(expression: IrReturn): IrReturn {
+        val returnTargetSymbol = expression.returnTargetSymbol
+        return if (returnTargetSymbol is IrReturnableBlockSymbol) {
+            IrReturnImpl(
+                    expression.startOffset, expression.endOffset,
+                    expression.type,
+                    transformedReturnableBlocks.getOrElse(returnTargetSymbol.owner) { returnTargetSymbol.owner }.symbol,
+                    expression.value.transform()
+            )
+        } else {
+            super.visitReturn(expression)
+        }
+    }
+}

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/Autoboxing.kt

@@ -20,8 +20,8 @@ import org.jetbrains.kotlin.backend.common.AbstractValueUsageTransformer
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.descriptors.isSuspend
 import org.jetbrains.kotlin.backend.konan.*
-import org.jetbrains.kotlin.backend.konan.descriptors.*
-import org.jetbrains.kotlin.backend.konan.util.atMostOne
+import org.jetbrains.kotlin.backend.konan.descriptors.getKonanInternalClass
+import org.jetbrains.kotlin.backend.konan.descriptors.target
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.declarations.IrFile
@@ -29,7 +29,10 @@ import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrTypeOperatorCallImpl
+import org.jetbrains.kotlin.ir.util.getPropertyGetter
 import org.jetbrains.kotlin.ir.util.isNullConst
+import org.jetbrains.kotlin.ir.util.render
+import org.jetbrains.kotlin.ir.util.type
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.TypeUtils
@@ -50,6 +53,8 @@ internal class Autoboxing(val context: Context) : FileLoweringPass {
 
 private class AutoboxingTransformer(val context: Context) : AbstractValueUsageTransformer(context.builtIns) {
 
+    val symbols = context.ir.symbols
+
     // TODO: should we handle the cases when expression type
     // is not equal to e.g. called function return type?
 
@@ -133,13 +138,13 @@ private class AutoboxingTransformer(val context: Context) : AbstractValueUsageTr
     override fun IrExpression.useAs(type: KotlinType): IrExpression {
         val interop = context.interopBuiltIns
         if (this.isNullConst() && interop.nullableInteropValueTypes.any { type.isRepresentedAs(it) }) {
-            return IrCallImpl(startOffset, endOffset, context.builtIns.getNativeNullPtr).uncheckedCast(type)
+            return IrCallImpl(startOffset, endOffset, symbols.getNativeNullPtr).uncheckedCast(type)
         }
 
         val actualType = when (this) {
             is IrCall -> {
                 if (this.descriptor.isSuspend) context.builtIns.nullableAnyType
-                else this.descriptor.original.returnType ?: this.type
+                else this.callTarget.returnType ?: this.type
             }
             is IrGetField -> this.descriptor.original.type
 
@@ -157,17 +162,32 @@ private class AutoboxingTransformer(val context: Context) : AbstractValueUsageTr
         return this.adaptIfNecessary(actualType, type)
     }
 
-    override fun IrExpression.useAsDispatchReceiver(function: CallableDescriptor): IrExpression {
-        return this.useAsArgument(function.original.dispatchReceiverParameter!!)
+    private val IrMemberAccessExpression.target: CallableDescriptor get() = when (this) {
+        is IrCall -> this.callTarget
+        is IrDelegatingConstructorCall -> this.descriptor.original
+        else -> TODO(this.render())
     }
 
-    override fun IrExpression.useAsExtensionReceiver(function: CallableDescriptor): IrExpression {
-        return this.useAsArgument(function.original.extensionReceiverParameter!!)
+    private val IrCall.callTarget: FunctionDescriptor
+        get() = if (superQualifier == null && descriptor.isOverridable) {
+            // A virtual call.
+            descriptor.original
+        } else {
+            descriptor.target
+        }
+
+    override fun IrExpression.useAsDispatchReceiver(expression: IrMemberAccessExpression): IrExpression {
+        return this.useAsArgument(expression.target.dispatchReceiverParameter!!)
     }
 
-    override fun IrExpression.useAsValueArgument(parameter: ValueParameterDescriptor): IrExpression {
-        val function = parameter.containingDeclaration
-        return this.useAsArgument(function.original.valueParameters[parameter.index])
+    override fun IrExpression.useAsExtensionReceiver(expression: IrMemberAccessExpression): IrExpression {
+        return this.useAsArgument(expression.target.extensionReceiverParameter!!)
+    }
+
+    override fun IrExpression.useAsValueArgument(expression: IrMemberAccessExpression,
+                                                 parameter: ValueParameterDescriptor): IrExpression {
+
+        return this.useAsArgument(expression.target.valueParameters[parameter.index])
     }
 
     override fun IrExpression.useForField(field: PropertyDescriptor): IrExpression {
@@ -211,9 +231,7 @@ private class AutoboxingTransformer(val context: Context) : AbstractValueUsageTr
             context.builtIns.getKonanInternalClass("${valueType.shortName}Box").defaultType
 
     private fun IrExpression.box(valueType: ValueType): IrExpression {
-        val boxFunctionName = "box${valueType.shortName}"
-        val boxFunction = context.builtIns.getKonanInternalFunctions(boxFunctionName).singleOrNull() ?:
-                TODO(valueType.toString())
+        val boxFunction = symbols.boxFunctions[valueType]!!
 
         return IrCallImpl(startOffset, endOffset, boxFunction).apply {
             putValueArgument(0, this@box)
@@ -221,22 +239,16 @@ private class AutoboxingTransformer(val context: Context) : AbstractValueUsageTr
     }
 
     private fun IrExpression.unbox(valueType: ValueType): IrExpression {
-        val unboxFunctionName = "unbox${valueType.shortName}"
-
-        context.builtIns.getKonanInternalFunctions(unboxFunctionName).atMostOne()?.let {
+        symbols.unboxFunctions[valueType]?.let {
             return IrCallImpl(startOffset, endOffset, it).apply {
-                putValueArgument(0, this@unbox.uncheckedCast(it.valueParameters[0].type))
+                putValueArgument(0, this@unbox.uncheckedCast(it.owner.valueParameters[0].type))
             }.uncheckedCast(this.type)
         }
 
-        val boxGetter = getBoxType(valueType)
-                .memberScope.getContributedDescriptors()
-                .filterIsInstance<PropertyDescriptor>()
-                .single { it.name.asString() == "value" }
-                .getter!!
+        val boxGetter = symbols.boxClasses[valueType]!!.getPropertyGetter("value")!!
 
         return IrCallImpl(startOffset, endOffset, boxGetter).apply {
-            dispatchReceiver = this@unbox.uncheckedCast(boxGetter.dispatchReceiverParameter!!.type)
+            dispatchReceiver = this@unbox.uncheckedCast(boxGetter.descriptor.dispatchReceiverParameter!!.type)
         }.uncheckedCast(this.type) // Try not to bring new type incompatibilities.
     }
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/BridgesBuilding.kt

@@ -16,13 +16,11 @@
 
 package org.jetbrains.kotlin.backend.konan.lower
 
-import org.jetbrains.kotlin.backend.common.BodyLoweringPass
 import org.jetbrains.kotlin.backend.common.ClassLoweringPass
 import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
 import org.jetbrains.kotlin.backend.common.lower.irBlockBody
 import org.jetbrains.kotlin.backend.common.lower.irIfThen
 import org.jetbrains.kotlin.backend.konan.Context
-import org.jetbrains.kotlin.backend.konan.ValueType
 import org.jetbrains.kotlin.backend.konan.descriptors.*
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.*
@@ -36,6 +34,7 @@ import org.jetbrains.kotlin.ir.declarations.IrProperty
 import org.jetbrains.kotlin.ir.declarations.impl.IrFunctionImpl
 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.util.createParameterDeclarations
 import org.jetbrains.kotlin.ir.util.type
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
@@ -43,46 +42,6 @@ import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.load.java.BuiltinMethodsWithSpecialGenericSignature
 import org.jetbrains.kotlin.types.KotlinType
 
-internal class DirectBridgesCallsLowering(val context: Context) : BodyLoweringPass {
-    override fun lower(irBody: IrBody) {
-        irBody.transformChildrenVoid(object : IrElementTransformerVoid() {
-            override fun visitCall(expression: IrCall): IrExpression {
-                expression.transformChildrenVoid(this)
-                val descriptor = expression.descriptor as? FunctionDescriptor ?: return expression
-                if (descriptor.modality == Modality.ABSTRACT
-                        || (expression.superQualifier == null && descriptor.isOverridable)) {
-                    // A virtual call. boxing/unboxing will be in the corresponding bridge.
-                    return expression
-                }
-
-                val target = descriptor.target
-                if (!descriptor.original.needBridgeTo(target)) return expression
-
-                return IrCallImpl(expression.startOffset, expression.endOffset,
-                        target, remapTypeArguments(expression, target), expression.origin,
-                        superQualifierDescriptor = target.containingDeclaration as ClassDescriptor /* Call non-virtually */
-                ).apply {
-                    dispatchReceiver = expression.dispatchReceiver
-                    extensionReceiver = expression.extensionReceiver
-                    mapValueParameters { expression.getValueArgument(it)!! }
-                }
-            }
-
-            private fun remapTypeArguments(oldExpression: IrMemberAccessExpression, newCallee: CallableDescriptor)
-                    : Map<TypeParameterDescriptor, KotlinType>? {
-                val oldCallee = oldExpression.descriptor
-
-                return if (oldCallee.typeParameters.isEmpty())
-                    null
-                else oldCallee.typeParameters.associateBy(
-                        { newCallee.typeParameters[it.index] },
-                        { oldExpression.getTypeArgument(it)!! }
-                )
-            }
-        })
-    }
-}
-
 internal class BridgesBuilding(val context: Context) : ClassLoweringPass {
 
     private fun IrBuilderWithScope.returnIfBadType(value: IrExpression,
@@ -162,30 +121,31 @@ internal class BridgesBuilding(val context: Context) : ClassLoweringPass {
     private object DECLARATION_ORIGIN_BRIDGE_METHOD :
             IrDeclarationOriginImpl("BRIDGE_METHOD")
 
-    private val ValueType.shortName
-        get() = this.classFqName.shortName()
-
-    private fun getBoxType(valueType: ValueType) =
-            context.builtIns.getKonanInternalClass("${valueType.shortName}Box").defaultType
-
     private fun buildBridge(descriptor: OverriddenFunctionDescriptor, irClass: IrClass) {
         val bridgeDescriptor = context.specialDeclarationsFactory.getBridgeDescriptor(descriptor)
-        val target = descriptor.descriptor.target
+        val bridge = IrFunctionImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, DECLARATION_ORIGIN_BRIDGE_METHOD,
+                bridgeDescriptor).apply { createParameterDeclarations() }
+
+        val target = descriptor.descriptor
+
+        assert(target.containingDeclaration == irClass.descriptor)
+        val superQualifierSymbol = irClass.symbol
+        val targetSymbol = irClass.findMember(target) // TODO: optimize
 
         val statements = mutableListOf<IrExpression>()
-        val irBuilder = context.createIrBuilder(bridgeDescriptor, irClass.startOffset, irClass.endOffset)
+        val irBuilder = context.createIrBuilder(bridge.symbol, irClass.startOffset, irClass.endOffset)
         irBuilder.run {
             val typeSafeBarrierDescription = BuiltinMethodsWithSpecialGenericSignature.getDefaultValueForOverriddenBuiltinFunction(descriptor.overriddenDescriptor)
             if (typeSafeBarrierDescription != null) {
-                val valueParameters = bridgeDescriptor.valueParameters
+                val valueParameters = bridge.valueParameters
                 for (i in valueParameters.indices) {
                     if (!typeSafeBarrierDescription.checkParameter(i))
                         continue
                     val type = target.valueParameters[i].type
                     if (type != context.builtIns.nullableAnyType) {
-                        statements += returnIfBadType(irGet(valueParameters[i]), type,
+                        statements += returnIfBadType(irGet(valueParameters[i].symbol), type,
                                 if (typeSafeBarrierDescription == BuiltinMethodsWithSpecialGenericSignature.TypeSafeBarrierDescription.MAP_GET_OR_DEFAULT)
-                                    irGet(valueParameters[2])
+                                    irGet(valueParameters[2].symbol)
                                 else irConst(typeSafeBarrierDescription.defaultValue)
                         )
                     }
@@ -193,22 +153,22 @@ internal class BridgesBuilding(val context: Context) : ClassLoweringPass {
             }
         }
 
-        val delegatingCall = IrCallImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, target,
-                superQualifierDescriptor = target.containingDeclaration as ClassDescriptor /* Call non-virtually */
+        val delegatingCall = IrCallImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, targetSymbol, target,
+                superQualifierSymbol = superQualifierSymbol /* Call non-virtually */
         ).apply {
-            val dispatchReceiverParameter = bridgeDescriptor.dispatchReceiverParameter
+            val dispatchReceiverParameter = bridge.dispatchReceiverParameter
             if (dispatchReceiverParameter != null)
-                dispatchReceiver = IrGetValueImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, dispatchReceiverParameter)
-            val extensionReceiverParameter = bridgeDescriptor.extensionReceiverParameter
+                dispatchReceiver = IrGetValueImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, dispatchReceiverParameter.symbol)
+            val extensionReceiverParameter = bridge.extensionReceiverParameter
             if (extensionReceiverParameter != null)
-                extensionReceiver = IrGetValueImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, extensionReceiverParameter)
-            bridgeDescriptor.valueParameters.forEach {
-                this.putValueArgument(it.index, IrGetValueImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, it))
+                extensionReceiver = IrGetValueImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, extensionReceiverParameter.symbol)
+            bridge.valueParameters.forEachIndexed { index, parameter ->
+                this.putValueArgument(index, IrGetValueImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, parameter.symbol))
             }
         }
 
         val bridgeBody = if (bridgeDescriptor.returnType.let { it != null && !KotlinBuiltIns.isUnitOrNullableUnit(it) })
-            IrReturnImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, bridgeDescriptor, delegatingCall)
+            IrReturnImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, bridge.symbol, delegatingCall)
         else
             delegatingCall
         statements += bridgeBody
@@ -219,3 +179,12 @@ internal class BridgesBuilding(val context: Context) : ClassLoweringPass {
         )
     }
 }
+
+private fun IrClass.findMember(descriptor: FunctionDescriptor): IrFunctionSymbol {
+    val functions = this.declarations.filterIsInstance<IrFunction>().map { it.symbol }
+    val propertyAccessors = this.declarations
+            .filterIsInstance<IrProperty>()
+            .flatMap { listOfNotNull(it.getter?.symbol, it.setter?.symbol) }
+
+    return (functions + propertyAccessors).single { it.descriptor == descriptor }
+}

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/CallableReferenceLowering.kt

@@ -20,8 +20,6 @@ import org.jetbrains.kotlin.backend.common.DeclarationContainerLoweringPass
 import org.jetbrains.kotlin.backend.common.descriptors.explicitParameters
 import org.jetbrains.kotlin.backend.common.lower.*
 import org.jetbrains.kotlin.backend.konan.Context
-import org.jetbrains.kotlin.backend.konan.descriptors.getKonanInternalClass
-import org.jetbrains.kotlin.backend.konan.descriptors.getKonanInternalFunctions
 import org.jetbrains.kotlin.backend.konan.descriptors.isFunctionOrKFunctionType
 import org.jetbrains.kotlin.backend.konan.descriptors.synthesizedName
 import org.jetbrains.kotlin.backend.konan.ir.createFakeOverrideDescriptor
@@ -45,8 +43,6 @@ import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.IrValueParameterSymbol
 import org.jetbrains.kotlin.ir.symbols.impl.IrConstructorSymbolImpl
 import org.jetbrains.kotlin.ir.symbols.impl.IrSimpleFunctionSymbolImpl
-import org.jetbrains.kotlin.ir.util.createParameterDeclarations
-import org.jetbrains.kotlin.ir.util.getArguments
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
@@ -54,9 +50,9 @@ import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
-import org.jetbrains.kotlin.ir.util.transformFlat
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.backend.common.descriptors.*
+import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.types.*
 
 internal class CallableReferenceLowering(val context: Context): DeclarationContainerLoweringPass {
@@ -122,7 +118,7 @@ internal class CallableReferenceLowering(val context: Context): DeclarationConta
     private val continuationClassDescriptor = coroutinesScope
             .getContributedClassifier(Name.identifier("Continuation"), NoLookupLocation.FROM_BACKEND) as ClassDescriptor
 
-    private val getContinuationDescriptor = context.builtIns.getKonanInternalFunctions("getContinuation").single()
+    private val getContinuationSymbol = context.ir.symbols.getContinuation
 
     private inner class FunctionReferenceBuilder(val containingDeclaration: DeclarationDescriptor,
                                                  val functionReference: IrFunctionReference) {
@@ -137,7 +133,7 @@ internal class CallableReferenceLowering(val context: Context): DeclarationConta
         private lateinit var functionReferenceThis: IrValueParameterSymbol
         private lateinit var argumentToPropertiesMap: Map<ParameterDescriptor, IrFieldSymbol>
 
-        private val kFunctionImplClassDescriptor = context.builtIns.getKonanInternalClass("KFunctionImpl")
+        private val kFunctionImplSymbol = context.ir.symbols.kFunctionImpl
 
         fun build(): BuiltFunctionReference {
             val startOffset = functionReference.startOffset
@@ -145,7 +141,7 @@ internal class CallableReferenceLowering(val context: Context): DeclarationConta
 
             val returnType = functionDescriptor.returnType!!
             val superTypes = mutableListOf(
-                    kFunctionImplClassDescriptor.defaultType.replace(listOf(returnType))
+                    kFunctionImplSymbol.owner.defaultType.replace(listOf(returnType))
             )
 
             val numberOfParameters = unboundFunctionParameters.size
@@ -196,7 +192,7 @@ internal class CallableReferenceLowering(val context: Context): DeclarationConta
                 suspendInvokeMethodBuilder = createInvokeMethodBuilder(suspendInvokeFunctionDescriptor)
             }
 
-            val inheritedKFunctionImpl = kFunctionImplClassDescriptor.unsubstitutedMemberScope
+            val inheritedKFunctionImpl = kFunctionImplSymbol.descriptor.unsubstitutedMemberScope
                     .getContributedDescriptors()
                     .map { it.createFakeOverrideDescriptor(functionReferenceClassDescriptor) }
                     .filterNotNull()
@@ -206,6 +202,8 @@ internal class CallableReferenceLowering(val context: Context): DeclarationConta
             functionReferenceClassDescriptor.initialize(
                     SimpleMemberScope(contributedDescriptors), setOf(constructorBuilder.symbol.descriptor), null)
 
+            functionReferenceClass.addFakeOverrides()
+
             constructorBuilder.initialize()
             functionReferenceClass.declarations.add(constructorBuilder.ir)
 
@@ -223,7 +221,7 @@ internal class CallableReferenceLowering(val context: Context): DeclarationConta
         private fun createConstructorBuilder()
                 = object : SymbolWithIrBuilder<IrConstructorSymbol, IrConstructor>() {
 
-            private val kFunctionImplConstructorDescriptor = kFunctionImplClassDescriptor.constructors.single()
+            private val kFunctionImplConstructorSymbol = kFunctionImplSymbol.constructors.single()
 
             override fun buildSymbol() = IrConstructorSymbolImpl(
                     ClassConstructorDescriptorImpl.create(
@@ -261,7 +259,8 @@ internal class CallableReferenceLowering(val context: Context): DeclarationConta
                     createParameterDeclarations()
 
                     body = irBuilder.irBlockBody {
-                        +IrDelegatingConstructorCallImpl(startOffset, endOffset, kFunctionImplConstructorDescriptor).apply {
+                        +IrDelegatingConstructorCallImpl(startOffset, endOffset,
+                                kFunctionImplConstructorSymbol, kFunctionImplConstructorSymbol.descriptor).apply {
                             val name = IrConstImpl(startOffset, endOffset, context.builtIns.stringType,
                                     IrConstKind.String, functionDescriptor.name.asString())
                             putValueArgument(0, name)
@@ -356,7 +355,8 @@ internal class CallableReferenceLowering(val context: Context): DeclarationConta
                                                 else {
                                                     if (ourSymbol.descriptor.isSuspend && unboundIndex == valueParameters.size)
                                                         // For suspend functions the last argument is continuation and it is implicit.
-                                                        irCall(getContinuationDescriptor.substitute(ourSymbol.descriptor.returnType!!))
+                                                        irCall(getContinuationSymbol,
+                                                                listOf(ourSymbol.descriptor.returnType!!))
                                                     else
                                                         irGet(valueParameters[unboundIndex++].symbol)
                                                 }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/DefaultArgumentStubGenerator.kt

@@ -21,8 +21,6 @@ import org.jetbrains.kotlin.backend.common.DeclarationContainerLoweringPass
 import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
 import org.jetbrains.kotlin.backend.common.lower.irBlockBody
 import org.jetbrains.kotlin.backend.konan.Context
-import org.jetbrains.kotlin.backend.konan.KonanBuiltIns
-import org.jetbrains.kotlin.backend.konan.descriptors.konanInternal
 import org.jetbrains.kotlin.backend.konan.descriptors.synthesizedName
 import org.jetbrains.kotlin.backend.konan.ir.ir2string
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
@@ -32,7 +30,6 @@ import org.jetbrains.kotlin.descriptors.impl.ClassConstructorDescriptorImpl
 import org.jetbrains.kotlin.descriptors.impl.SimpleFunctionDescriptorImpl
 import org.jetbrains.kotlin.descriptors.impl.TypeParameterDescriptorImpl
 import org.jetbrains.kotlin.descriptors.impl.ValueParameterDescriptorImpl
-import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.declarations.*
@@ -42,8 +39,9 @@ import org.jetbrains.kotlin.ir.declarations.impl.IrVariableImpl
 import org.jetbrains.kotlin.ir.descriptors.IrTemporaryVariableDescriptorImpl
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.*
-import org.jetbrains.kotlin.ir.util.createParameterDeclarations
-import org.jetbrains.kotlin.ir.util.transformFlat
+import org.jetbrains.kotlin.ir.symbols.*
+import org.jetbrains.kotlin.ir.symbols.impl.IrVariableSymbolImpl
+import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.name.Name
@@ -52,7 +50,6 @@ import org.jetbrains.kotlin.resolve.descriptorUtil.builtIns
 import org.jetbrains.kotlin.resolve.descriptorUtil.hasDefaultValue
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.typeUtil.builtIns
-import org.jetbrains.kotlin.util.OperatorNameConventions
 
 class DefaultArgumentStubGenerator internal constructor(val context: Context): DeclarationContainerLoweringPass {
     override fun lower(irDeclarationContainer: IrDeclarationContainer) {
@@ -65,8 +62,7 @@ class DefaultArgumentStubGenerator internal constructor(val context: Context): D
 
     }
 
-    object DECLARATION_ORIGIN_FUNCTION_FOR_DEFAULT_PARAMETER :
-            IrDeclarationOriginImpl("DEFAULT_PARAMETER_EXTENT")
+    private val symbols = context.ir.symbols
 
     private fun lower(irFunction: IrFunction): List<IrFunction> {
         val functionDescriptor = irFunction.descriptor
@@ -81,27 +77,28 @@ class DefaultArgumentStubGenerator internal constructor(val context: Context): D
         log("detected ${functionDescriptor.name.asString()} has got #${bodies.size} default expressions")
         functionDescriptor.overriddenDescriptors.forEach { context.log{"DEFAULT-REPLACER: $it"} }
         if (bodies.isNotEmpty()) {
-            val descriptor = functionDescriptor.generateDefaultsDescription(context)
+            val newIrFunction = functionDescriptor.generateDefaultsFunction(context)
+            val descriptor = newIrFunction.descriptor
             log("$functionDescriptor -> $descriptor")
-            val builder = context.createIrBuilder(descriptor)
+            val builder = context.createIrBuilder(newIrFunction.symbol)
             val body = builder.irBlockBody(irFunction) {
-                val params = mutableListOf<VariableDescriptor>()
-                val variables = mutableMapOf<ValueDescriptor, ValueDescriptor>()
+                val params = mutableListOf<IrVariableSymbol>()
+                val variables = mutableMapOf<ValueDescriptor, IrValueSymbol>()
                 if (descriptor.extensionReceiverParameter != null) {
-                    variables[functionDescriptor.extensionReceiverParameter!!] = descriptor.extensionReceiverParameter!!
+                    variables[functionDescriptor.extensionReceiverParameter!!] =
+                            newIrFunction.extensionReceiverParameter!!.symbol
                 }
 
                 for (valueParameter in functionDescriptor.valueParameters) {
-                    val parameterDescriptor = descriptor.valueParameters[valueParameter.index]
-                    val temporaryVariableDescriptor = scope.createTemporaryVariableDescriptor(parameterDescriptor)
-                    params.add(temporaryVariableDescriptor)
-                    variables.put(valueParameter, temporaryVariableDescriptor)
+                    val parameterSymbol = newIrFunction.valueParameters[valueParameter.index].symbol
+                    val temporaryVariableSymbol =
+                            IrVariableSymbolImpl(scope.createTemporaryVariableDescriptor(parameterSymbol.descriptor))
+                    params.add(temporaryVariableSymbol)
+                    variables.put(valueParameter, temporaryVariableSymbol)
                     if (valueParameter.hasDefaultValue()) {
-                        val kIntAnd = valueParameter.builtIns.intType.memberScope
-                                .getContributedFunctions(OperatorNameConventions.AND, NoLookupLocation.FROM_BACKEND)
-                                .single()
+                        val kIntAnd = symbols.intAnd
                         val condition = irNotEquals(irCall(kIntAnd).apply {
-                            dispatchReceiver = irGet(maskParameterDescriptor(descriptor, valueParameter.index / 32))
+                            dispatchReceiver = irGet(maskParameterSymbol(newIrFunction, valueParameter.index / 32))
                             putValueArgument(0, irInt(1 shl (valueParameter.index % 32)))
                         }, irInt(0))
                         val expressionBody = getDefaultParameterExpressionBody(irFunction, valueParameter)
@@ -110,51 +107,45 @@ class DefaultArgumentStubGenerator internal constructor(val context: Context): D
                         expressionBody.transformChildrenVoid(object:IrElementTransformerVoid() {
                             override fun visitGetValue(expression: IrGetValue): IrExpression {
                                 log("GetValue: ${expression.descriptor}")
-                                val valueDescriptor = variables[expression.descriptor]
-                                return when (valueDescriptor) {
-                                    is VariableDescriptor          -> irGet(valueDescriptor)
-                                    is ReceiverParameterDescriptor -> irGet(valueDescriptor)
-                                    null                           -> expression
-                                    else                           -> TODO("$valueDescriptor")
-                                }
-
+                                val valueSymbol = variables[expression.descriptor] ?: return expression
+                                return irGet(valueSymbol)
                             }
                         })
                         val variableInitialization = irIfThenElse(
-                                type      = temporaryVariableDescriptor.type,
+                                type      = temporaryVariableSymbol.descriptor.type,
                                 condition = condition,
                                 thenPart  = expressionBody.expression,
-                                elsePart  = irGet(parameterDescriptor))
+                                elsePart  = irGet(parameterSymbol))
                         + scope.createTemporaryVariable(
-                                descriptor  = temporaryVariableDescriptor,
+                                symbol  = temporaryVariableSymbol,
                                 initializer = variableInitialization)
                         /* Mapping calculated values with its origin variables. */
                     } else {
                         + scope.createTemporaryVariable(
-                                descriptor   = temporaryVariableDescriptor,
-                                initializer = irGet(parameterDescriptor))
+                                symbol  = temporaryVariableSymbol,
+                                initializer = irGet(parameterSymbol))
                     }
                 }
-                if (functionDescriptor is ClassConstructorDescriptor) {
+                if (irFunction is IrConstructor) {
                     + IrDelegatingConstructorCallImpl(
                             startOffset = irFunction.startOffset,
                             endOffset   = irFunction.endOffset,
-                            constructorDescriptor = functionDescriptor
+                            symbol = irFunction.symbol, descriptor = irFunction.symbol.descriptor
                     ).apply {
                         params.forEachIndexed { i, variable ->
                             putValueArgument(i, irGet(variable))
                         }
                         if (functionDescriptor.dispatchReceiverParameter != null) {
-                            dispatchReceiver = irThis()
+                            dispatchReceiver = irGet(newIrFunction.dispatchReceiverParameter!!.symbol)
                         }
                     }
                 } else {
-                    +irReturn(irCall(functionDescriptor).apply {
+                    +irReturn(irCall(irFunction.symbol).apply {
                         if (functionDescriptor.dispatchReceiverParameter != null) {
-                            dispatchReceiver = irThis()
+                            dispatchReceiver = irGet(newIrFunction.dispatchReceiverParameter!!.symbol)
                         }
                         if (functionDescriptor.extensionReceiverParameter != null) {
-                            extensionReceiver = irGet(variables[functionDescriptor.extensionReceiverParameter!!] as ReceiverParameterDescriptor)
+                            extensionReceiver = irGet(variables[functionDescriptor.extensionReceiverParameter!!]!!)
                         }
                         params.forEachIndexed { i, variable ->
                             putValueArgument(i, irGet(variable))
@@ -188,26 +179,31 @@ class DefaultArgumentStubGenerator internal constructor(val context: Context): D
     private fun log(msg:String) = context.log{"DEFAULT-REPLACER: $msg"}
 }
 
-private fun Scope.createTemporaryVariableDescriptor(parameterDescriptor: ValueParameterDescriptor?): VariableDescriptor =
+private fun Scope.createTemporaryVariableDescriptor(parameterDescriptor: ParameterDescriptor?): VariableDescriptor =
         IrTemporaryVariableDescriptorImpl(
                 containingDeclaration = this.scopeOwner,
                 name                  = parameterDescriptor!!.name.asString().synthesizedName,
                 outType               = parameterDescriptor.type,
                 isMutable             = false)
 
-private fun Scope.createTemporaryVariable(descriptor: VariableDescriptor, initializer: IrExpression) =
+private fun Scope.createTemporaryVariable(symbol: IrVariableSymbol, initializer: IrExpression) =
         IrVariableImpl(
                 startOffset = initializer.startOffset,
                 endOffset   = initializer.endOffset,
                 origin      = IrDeclarationOrigin.IR_TEMPORARY_VARIABLE,
-                descriptor  = descriptor,
-                initializer = initializer)
+                symbol      = symbol).apply {
+
+            this.initializer = initializer
+        }
 
 private fun getDefaultParameterExpressionBody(irFunction: IrFunction, valueParameter: ValueParameterDescriptor):IrExpressionBody {
     return irFunction.getDefault(valueParameter) as? IrExpressionBody ?: TODO("FIXME!!!")
 }
 
-private fun maskParameterDescriptor(descriptor: FunctionDescriptor, number:Int)= descriptor.valueParameters.single { it.name == parameterMaskName(number) }
+private fun maskParameterDescriptor(function: IrFunction, number: Int) =
+        maskParameterSymbol(function, number).descriptor as ValueParameterDescriptor
+private fun maskParameterSymbol(function: IrFunction, number: Int) =
+        function.valueParameters.single { it.descriptor.name == parameterMaskName(number) }.symbol
 
 private fun markerParameterDescriptor(descriptor: FunctionDescriptor) = descriptor.valueParameters.single { it.name == kConstructorMarkerName }
 
@@ -237,11 +233,12 @@ class DefaultParameterInjector internal constructor(val context: Context): BodyL
                 val argumentsCount = argumentCount(expression)
                 if (argumentsCount == descriptor.valueParameters.size)
                     return expression
-                val (descriptorForCall, params) = parametersForCall(expression)
+                val (symbolForCall, params) = parametersForCall(expression)
                 return IrDelegatingConstructorCallImpl(
                         startOffset = expression.startOffset,
                         endOffset   = expression.endOffset,
-                        constructorDescriptor = descriptorForCall as ClassConstructorDescriptor)
+                        symbol      = symbolForCall as IrConstructorSymbol,
+                        descriptor  = symbolForCall.descriptor)
                             .apply {
                                 params.forEach {
                                     log("call::params@${it.first.index}/${it.first.name.asString()}: ${ir2string(it.second)}")
@@ -254,7 +251,7 @@ class DefaultParameterInjector internal constructor(val context: Context): BodyL
 
             override fun visitCall(expression: IrCall): IrExpression {
                 super.visitCall(expression)
-                val functionDescriptor = expression.descriptor as FunctionDescriptor
+                val functionDescriptor = expression.descriptor
 
                 if (!functionDescriptor.needsDefaultArgumentsLowering)
                     return expression
@@ -262,13 +259,15 @@ class DefaultParameterInjector internal constructor(val context: Context): BodyL
                 val argumentsCount = argumentCount(expression)
                 if (argumentsCount == functionDescriptor.valueParameters.size)
                     return expression
-                val (descriptor, params) = parametersForCall(expression)
+                val (symbol, params) = parametersForCall(expression)
+                val descriptor = symbol.descriptor
                 descriptor.typeParameters.forEach { log("$descriptor [${it.index}]: $it") }
                 descriptor.original.typeParameters.forEach { log("${descriptor.original}[${it.index}] : $it") }
                 return IrCallImpl(
                         startOffset   = expression.startOffset,
                         endOffset     = expression.endOffset,
-                        calleeDescriptor = descriptor,
+                        symbol        = symbol,
+                        descriptor    = descriptor,
                         typeArguments = expression.descriptor.typeParameters.map{it to (expression.getTypeArgument(it) ?: it.defaultType) }.toMap())
                         .apply {
                             params.forEach {
@@ -286,13 +285,14 @@ class DefaultParameterInjector internal constructor(val context: Context): BodyL
                         }
             }
 
-            private fun parametersForCall(expression: IrMemberAccessExpression): Pair<FunctionDescriptor, List<Pair<ValueParameterDescriptor, IrExpression?>>> {
+            private fun parametersForCall(expression: IrMemberAccessExpression): Pair<IrFunctionSymbol, List<Pair<ValueParameterDescriptor, IrExpression?>>> {
                 val descriptor = expression.descriptor as FunctionDescriptor
                 val keyDescriptor = if (DescriptorUtils.isOverride(descriptor))
                     DescriptorUtils.getAllOverriddenDescriptors(descriptor).first()
                 else
                     descriptor.original
-                val realDescriptor = keyDescriptor.generateDefaultsDescription(context)
+                val realFunction = keyDescriptor.generateDefaultsFunction(context)
+                val realDescriptor = realFunction.descriptor
 
                 log("$descriptor -> $realDescriptor")
                 val maskValues = Array(descriptor.valueParameters.size / 32 + 1, {0})
@@ -308,24 +308,24 @@ class DefaultParameterInjector internal constructor(val context: Context): BodyL
                     return@mapIndexed pair
                 })
                 maskValues.forEachIndexed { i, maskValue ->
-                    params += maskParameterDescriptor(realDescriptor, i) to IrConstImpl.int(
+                    params += maskParameterDescriptor(realFunction, i) to IrConstImpl.int(
                             startOffset = irBody.startOffset,
                             endOffset   = irBody.endOffset,
                             type        = descriptor.builtIns.intType,
                             value       = maskValue)
                 }
                 if (expression.descriptor is ClassConstructorDescriptor) {
-                    val defaultArgumentMarker = getDefaultArgumentMarkerClassDescriptor(context.builtIns)
+                    val defaultArgumentMarker = context.ir.symbols.defaultArgumentMarker
                     params += markerParameterDescriptor(realDescriptor) to IrGetObjectValueImpl(
                             startOffset = irBody.startOffset,
                             endOffset   = irBody.endOffset,
-                            type        = defaultArgumentMarker.defaultType,
-                            descriptor  = defaultArgumentMarker)
+                            type        = defaultArgumentMarker.owner.defaultType,
+                            symbol      = defaultArgumentMarker)
                 }
                 params.forEach {
                     log("descriptor::${realDescriptor.name.asString()}#${it.first.index}: ${it.first.name.asString()}")
                 }
-                return Pair(realDescriptor, params)
+                return Pair(realFunction.symbol, params)
             }
 
             private fun argumentCount(expression: IrMemberAccessExpression) =
@@ -339,8 +339,8 @@ class DefaultParameterInjector internal constructor(val context: Context): BodyL
 private val CallableMemberDescriptor.needsDefaultArgumentsLowering
     get() = valueParameters.any { it.hasDefaultValue() } && !(this is FunctionDescriptor && isInline)
 
-private fun FunctionDescriptor.generateDefaultsDescription(context: Context): FunctionDescriptor {
-    return context.ir.defaultParameterDescriptorsCache.getOrPut(this) {
+private fun FunctionDescriptor.generateDefaultsFunction(context: Context): IrFunction {
+    return context.ir.defaultParameterDeclarationsCache.getOrPut(this) {
         val descriptor = when (this) {
             is ClassConstructorDescriptor ->
                 ClassConstructorDescriptorImpl.create(
@@ -367,7 +367,7 @@ private fun FunctionDescriptor.generateDefaultsDescription(context: Context): Fu
         if (this is ClassConstructorDescriptor) {
             syntheticParameters += valueParameter(descriptor, syntheticParameters.last().index + 1,
                     kConstructorMarkerName,
-                    getDefaultArgumentMarkerClassDescriptor(context.builtIns).defaultType)
+                    context.ir.symbols.defaultArgumentMarker.owner.defaultType)
         }
         descriptor.initialize(
                 /* receiverParameterType         = */ extensionReceiverParameter?.type,
@@ -407,10 +407,33 @@ private fun FunctionDescriptor.generateDefaultsDescription(context: Context): Fu
                 /* visibility                    = */ this.visibility)
         descriptor.isSuspend = this.isSuspend
         context.log{"adds to cache[$this] = $descriptor"}
-        descriptor
+
+        val startOffset = this.startOffsetOrUndefined
+        val endOffset = this.endOffsetOrUndefined
+
+        val result: IrFunction = when (descriptor) {
+            is ClassConstructorDescriptor -> IrConstructorImpl(
+                    startOffset, endOffset,
+                    DECLARATION_ORIGIN_FUNCTION_FOR_DEFAULT_PARAMETER,
+                    descriptor
+            )
+
+            else -> IrFunctionImpl(
+                    startOffset, endOffset,
+                    DECLARATION_ORIGIN_FUNCTION_FOR_DEFAULT_PARAMETER,
+                    descriptor
+            )
+        }
+
+        result.createParameterDeclarations()
+
+        result
     }
 }
 
+object DECLARATION_ORIGIN_FUNCTION_FOR_DEFAULT_PARAMETER :
+        IrDeclarationOriginImpl("DEFAULT_PARAMETER_EXTENT")
+
 private fun valueParameter(descriptor: FunctionDescriptor, index: Int, name: Name, type: KotlinType):ValueParameterDescriptor {
      return ValueParameterDescriptorImpl(
             containingDeclaration = descriptor,
@@ -429,9 +452,4 @@ private fun valueParameter(descriptor: FunctionDescriptor, index: Int, name: Nam
 
 internal val kConstructorMarkerName = "marker".synthesizedName
 
-private fun getDefaultArgumentMarkerClassDescriptor(builtIns: KonanBuiltIns): ClassDescriptor =
-        builtIns.konanInternal.getContributedClassifier(
-                Name.identifier("DefaultArgumentMarker"), NoLookupLocation.FROM_BACKEND) as ClassDescriptor
-
-internal fun IrBuilderWithScope.irGet(descriptor: ReceiverParameterDescriptor):IrGetValue = IrGetValueImpl(startOffset, endOffset, descriptor)
 private fun parameterMaskName(number: Int) = "mask$number".synthesizedName

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/EnumClassLowering.kt

@@ -282,6 +282,8 @@ internal class EnumClassLowering(val context: Context) : ClassLoweringPass {
                     .toList()
             defaultClassDescriptor.initialize(SimpleMemberScope(contributedDescriptors), constructors, null)
 
+            defaultClass.addFakeOverrides()
+
             return defaultClass
         }
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FinallyBlocksLowering.kt

@@ -1,24 +1,25 @@
 package org.jetbrains.kotlin.backend.konan.lower
 
-import org.jetbrains.kotlin.backend.common.DeepCopyIrTreeWithDeclarations
 import org.jetbrains.kotlin.backend.common.FunctionLoweringPass
 import org.jetbrains.kotlin.backend.common.lower.*
 import org.jetbrains.kotlin.backend.common.*
 import org.jetbrains.kotlin.backend.konan.Context
 import org.jetbrains.kotlin.backend.konan.descriptors.synthesizedName
 import org.jetbrains.kotlin.backend.konan.ir.IrReturnableBlockImpl
+import org.jetbrains.kotlin.backend.konan.ir.IrReturnableBlockSymbol
+import org.jetbrains.kotlin.backend.konan.ir.IrReturnableBlockSymbolImpl
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.descriptors.annotations.Annotations
 import org.jetbrains.kotlin.descriptors.impl.SimpleFunctionDescriptorImpl
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
-import org.jetbrains.kotlin.ir.declarations.IrDeclarationOriginImpl
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.declarations.impl.IrVariableImpl
 import org.jetbrains.kotlin.ir.descriptors.IrTemporaryVariableDescriptorImpl
 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.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.name.Name
@@ -32,9 +33,9 @@ internal class FinallyBlocksLowering(val context: Context): FunctionLoweringPass
         fun toIr(context: Context, startOffset: Int, endOffset: Int, value: IrExpression): IrExpression
     }
 
-    private data class Return(val functionDescriptor: FunctionDescriptor): HighLevelJump {
+    private data class Return(val target: IrFunctionSymbol): HighLevelJump {
         override fun toIr(context: Context, startOffset: Int, endOffset: Int, value: IrExpression)
-                = IrReturnImpl(startOffset, endOffset, functionDescriptor, value)
+                = IrReturnImpl(startOffset, endOffset, target, value)
     }
 
     private data class Break(val loop: IrLoop): HighLevelJump {
@@ -64,7 +65,7 @@ internal class FinallyBlocksLowering(val context: Context): FunctionLoweringPass
     private class TryScope(var expression: IrExpression,
                            val finallyExpression: IrExpression,
                            val irBuilder: IrBuilderWithScope): Scope() {
-        val jumps = mutableMapOf<HighLevelJump, FunctionDescriptor>()
+        val jumps = mutableMapOf<HighLevelJump, IrFunctionSymbol>()
     }
 
     private val scopeStack = mutableListOf<Scope>()
@@ -101,26 +102,26 @@ internal class FinallyBlocksLowering(val context: Context): FunctionLoweringPass
                 override fun visitBreak(jump: IrBreak): IrExpression {
                     val startOffset = jump.startOffset
                     val endOffset = jump.endOffset
-                    val irBuilder = context.createIrBuilder(functionDescriptor, startOffset, endOffset)
+                    val irBuilder = context.createIrBuilder(irFunction.symbol, startOffset, endOffset)
                     return performHighLevelJump(
                             targetScopePredicate = { it is LoopScope && it.loop == jump.loop },
                             jump                 = Break(jump.loop),
                             startOffset          = startOffset,
                             endOffset            = endOffset,
-                            value                = irBuilder.irUnit()
+                            value                = irBuilder.irGetObject(context.ir.symbols.unit)
                     ) ?: jump
                 }
 
                 override fun visitContinue(jump: IrContinue): IrExpression {
                     val startOffset = jump.startOffset
                     val endOffset = jump.endOffset
-                    val irBuilder = context.createIrBuilder(functionDescriptor, startOffset, endOffset)
+                    val irBuilder = context.createIrBuilder(irFunction.symbol, startOffset, endOffset)
                     return performHighLevelJump(
                             targetScopePredicate = { it is LoopScope && it.loop == jump.loop },
                             jump                 = Continue(jump.loop),
                             startOffset          = startOffset,
                             endOffset            = endOffset,
-                            value                = irBuilder.irUnit()
+                            value                = irBuilder.irGetObject(context.ir.symbols.unit)
                     ) ?: jump
                 }
 
@@ -129,7 +130,7 @@ internal class FinallyBlocksLowering(val context: Context): FunctionLoweringPass
 
                     return performHighLevelJump(
                             targetScopePredicate = { it is ReturnableScope && it.descriptor == expression.returnTarget },
-                            jump                 = Return(expression.returnTarget),
+                            jump                 = Return(expression.returnTargetSymbol),
                             startOffset          = expression.startOffset,
                             endOffset            = expression.endOffset,
                             value                = expression.value
@@ -161,10 +162,10 @@ internal class FinallyBlocksLowering(val context: Context): FunctionLoweringPass
 
                     val currentTryScope = tryScopes[index]
                     currentTryScope.jumps.getOrPut(jump) {
-                        val descriptor = getFakeFunctionDescriptor(jump.toString(), value.type)
+                        val symbol = getIrReturnableBlockSymbol(jump.toString(), value.type)
                         with(currentTryScope) {
                             irBuilder.run {
-                                val inlinedFinally = irInlineFinally(descriptor, expression, finallyExpression)
+                                val inlinedFinally = irInlineFinally(symbol, expression, finallyExpression)
                                 expression = performHighLevelJump(
                                         tryScopes   = tryScopes,
                                         index       = index + 1,
@@ -174,12 +175,12 @@ internal class FinallyBlocksLowering(val context: Context): FunctionLoweringPass
                                         value       = inlinedFinally)
                             }
                         }
-                        descriptor
+                        symbol
                     }.let {
                         return IrReturnImpl(
                                 startOffset  = startOffset,
                                 endOffset    = endOffset,
-                                returnTargetDescriptor = it,
+                                returnTargetSymbol = it,
                                 value        = value)
                     }
                 }
@@ -191,7 +192,7 @@ internal class FinallyBlocksLowering(val context: Context): FunctionLoweringPass
 
                     val startOffset = aTry.startOffset
                     val endOffset = aTry.endOffset
-                    val irBuilder = context.createIrBuilder(functionDescriptor, startOffset, endOffset)
+                    val irBuilder = context.createIrBuilder(irFunction.symbol, startOffset, endOffset)
                     val transformer = this
                     irBuilder.run {
                         val transformedTry = IrTryImpl(
@@ -223,33 +224,33 @@ internal class FinallyBlocksLowering(val context: Context): FunctionLoweringPass
                                 finallyExpression = null
                         )
                         using(TryScope(syntheticTry, transformedFinallyExpression, this)) {
-                            val fallThroughDescriptor = getFakeFunctionDescriptor("fallThrough", aTry.type)
+                            val fallThroughSymbol = getIrReturnableBlockSymbol("fallThrough", aTry.type)
                             val transformedResult = aTry.tryResult.transform(transformer, null)
-                            transformedTry.tryResult = irReturn(fallThroughDescriptor, transformedResult)
+                            transformedTry.tryResult = irReturn(fallThroughSymbol, transformedResult)
                             for (aCatch in aTry.catches) {
                                 val transformedCatch = aCatch.transform(transformer, null)
-                                transformedCatch.result = irReturn(fallThroughDescriptor, transformedCatch.result)
+                                transformedCatch.result = irReturn(fallThroughSymbol, transformedCatch.result)
                                 transformedTry.catches.add(transformedCatch)
                             }
-                            return irInlineFinally(fallThroughDescriptor, it.expression, it.finallyExpression)
+                            return irInlineFinally(fallThroughSymbol, it.expression, it.finallyExpression)
                         }
                     }
                 }
 
-                private fun IrBuilderWithScope.irInlineFinally(descriptor: FunctionDescriptor,
+                private fun IrBuilderWithScope.irInlineFinally(symbol: IrReturnableBlockSymbol,
                                                                value: IrExpression,
                                                                finallyExpression: IrExpression): IrExpression {
-                    val returnType = descriptor.returnType!!
+                    val returnType = symbol.descriptor.returnType!!
                     return when {
                         returnType.isUnit() || returnType.isNothing() -> irBlock(value, null, returnType) {
-                            +irReturnableBlock(descriptor) {
+                            +irReturnableBlock(symbol) {
                                 +value
                             }
                             +finallyExpression.copy()
                         }
                         else -> irBlock(value, null, returnType) {
-                            val tmp = irTemporary(irReturnableBlock(descriptor) {
-                                +irReturn(descriptor, value)
+                            val tmp = irTemporary(irReturnableBlock(symbol) {
+                                +irReturn(symbol, value)
                             })
                             +finallyExpression.copy()
                             +irGet(tmp.symbol)
@@ -268,23 +269,19 @@ internal class FinallyBlocksLowering(val context: Context): FunctionLoweringPass
                     }
                 }
 
-                @Suppress("UNCHECKED_CAST")
-                private fun <T: IrElement> T.copy() = this.transform(DeepCopyIrTreeWithDeclarations(), data = null) as T
+                private fun getIrReturnableBlockSymbol(name: String, returnType: KotlinType): IrReturnableBlockSymbol =
+                        IrReturnableBlockSymbolImpl(getFakeFunctionDescriptor(name, returnType))
+
+                private inline fun <reified T : IrElement> T.copy() = this.deepCopyWithVariables()
             })
         }
     }
 
-    private object DECLARATION_ORIGIN_FINALLY_BLOCK :
-            IrDeclarationOriginImpl("FINALLY_BLOCK")
-
-    private fun IrBuilderWithScope.irVar(descriptor: VariableDescriptor, initializer: IrExpression?) =
-            IrVariableImpl(startOffset, endOffset, DECLARATION_ORIGIN_FINALLY_BLOCK, descriptor, initializer)
-
-    fun IrBuilderWithScope.irReturn(target: FunctionDescriptor, value: IrExpression) =
+    fun IrBuilderWithScope.irReturn(target: IrFunctionSymbol, value: IrExpression) =
             IrReturnImpl(startOffset, endOffset, target, value)
 
-    inline fun IrBuilderWithScope.irReturnableBlock(descriptor: FunctionDescriptor, body: IrBlockBuilder.() -> Unit) =
-            IrReturnableBlockImpl(startOffset, endOffset, descriptor.returnType!!, descriptor, null,
-                    IrBlockBuilder(context, scope, startOffset, endOffset, null, descriptor.returnType!!)
+    inline fun IrBuilderWithScope.irReturnableBlock(symbol: IrReturnableBlockSymbol, body: IrBlockBuilder.() -> Unit) =
+            IrReturnableBlockImpl(startOffset, endOffset, symbol.descriptor.returnType!!, symbol, null,
+                    IrBlockBuilder(context, scope, startOffset, endOffset, null, symbol.descriptor.returnType!!)
                             .block(body).statements)
 }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InteropLowering.kt

@@ -25,32 +25,60 @@ import org.jetbrains.kotlin.backend.konan.ValueType
 import org.jetbrains.kotlin.backend.konan.isRepresentedAs
 import org.jetbrains.kotlin.backend.konan.reportCompilationError
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
-import org.jetbrains.kotlin.descriptors.*
-import org.jetbrains.kotlin.incremental.components.NoLookupLocation
+import org.jetbrains.kotlin.descriptors.ClassConstructorDescriptor
 import org.jetbrains.kotlin.ir.builders.IrBuilder
-import org.jetbrains.kotlin.ir.builders.IrBuilderWithScope
 import org.jetbrains.kotlin.ir.builders.irCall
-import org.jetbrains.kotlin.ir.builders.irGet
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.expressions.*
-import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrConstImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrFunctionReferenceImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrGetObjectValueImpl
+import org.jetbrains.kotlin.ir.util.defaultType
+import org.jetbrains.kotlin.ir.util.functions
 import org.jetbrains.kotlin.ir.util.getArguments
+import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.OverridingUtil
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
-import org.jetbrains.kotlin.resolve.scopes.MemberScope
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.TypeUtils
 import org.jetbrains.kotlin.types.typeUtil.isSubtypeOf
 
+internal class InteropLoweringPart1(val context: Context) : IrElementTransformerVoid(), FileLoweringPass {
+    override fun lower(irFile: IrFile) {
+        irFile.transformChildrenVoid(this)
+    }
+
+    override fun visitCall(expression: IrCall): IrExpression {
+        expression.transformChildrenVoid()
+
+        return when (expression.descriptor.original) {
+            context.interopBuiltIns.typeOf -> {
+                val typeArgument = expression.getSingleTypeArgument()
+                val classDescriptor = TypeUtils.getClassDescriptor(typeArgument)
+
+                if (classDescriptor == null) {
+                    expression
+                } else {
+                    val companionObjectDescriptor = classDescriptor.companionObjectDescriptor ?:
+                            error("native variable class $classDescriptor must have the companion object")
+
+                    IrGetObjectValueImpl(
+                            expression.startOffset, expression.endOffset,
+                            companionObjectDescriptor.defaultType, companionObjectDescriptor
+                    )
+                }
+            }
+            else -> expression
+        }
+    }
+}
+
 /**
  * Lowers some interop intrinsic calls.
  */
-internal class InteropLowering(val context: Context) : FileLoweringPass {
+internal class InteropLoweringPart2(val context: Context) : FileLoweringPass {
     override fun lower(irFile: IrFile) {
         val transformer = InteropTransformer(context, irFile)
         irFile.transformChildrenVoid(transformer)
@@ -60,142 +88,7 @@ internal class InteropLowering(val context: Context) : FileLoweringPass {
 private class InteropTransformer(val context: Context, val irFile: IrFile) : IrBuildingTransformer(context) {
 
     val interop = context.interopBuiltIns
-    val konanBuiltins = context.builtIns
-
-    private fun MemberScope.getSingleContributedFunction(name: String,
-                                                         predicate: (SimpleFunctionDescriptor) -> Boolean) =
-            this.getContributedFunctions(Name.identifier(name), NoLookupLocation.FROM_BACKEND).single(predicate)
-
-    private fun IrBuilder.irGetObject(descriptor: ClassDescriptor): IrExpression {
-        return IrGetObjectValueImpl(startOffset, endOffset, descriptor.defaultType, descriptor)
-    }
-
-    private fun IrBuilder.typeOf(descriptor: ClassDescriptor): IrExpression {
-        val companionObject = descriptor.companionObjectDescriptor ?:
-                error("native variable class $descriptor must have the companion object")
-        // TODO: add more checks and produce the compile error instead of exception.
-
-        return irGetObject(companionObject)
-    }
-
-    private fun IrBuilder.typeOf(type: KotlinType): IrExpression? {
-        val descriptor = TypeUtils.getClassDescriptor(type) ?: return null
-        return typeOf(descriptor)
-    }
-
-    private fun KotlinType.findOverride(property: PropertyDescriptor): PropertyDescriptor {
-        val result = this.memberScope.getContributedVariables(property.name, NoLookupLocation.FROM_BACKEND).single()
-        assert (OverridingUtil.overrides(result, property))
-        return result
-    }
-
-    private fun IrBuilderWithScope.sizeOf(typeObject: IrExpression): IrExpression {
-        val sizeProperty = typeObject.type.findOverride(interop.variableTypeSize)
-        return irGet(typeObject, sizeProperty)
-    }
-
-    private fun IrBuilderWithScope.sizeOf(type: KotlinType): IrExpression? {
-        val typeObject = typeOf(type) ?: return null
-        return sizeOf(typeObject)
-    }
-
-    private fun IrBuilderWithScope.alignOf(typeObject: IrExpression): IrExpression {
-        val alignProperty = typeObject.type.findOverride(interop.variableTypeAlign)
-        return irGet(typeObject, alignProperty)
-    }
-
-    private fun IrBuilderWithScope.alignOf(type: KotlinType): IrExpression? {
-        val typeObject = typeOf(type) ?: return null
-        return alignOf(typeObject)
-    }
-
-    @Suppress("UNUSED_PARAMETER")
-    private fun IrBuilderWithScope.interpretPointed(expression: IrCall, type: KotlinType): IrExpression =
-            irCall(interop.interpretNullablePointed).apply {
-                putValueArgument(0, expression)
-            }
-    // TODO: make the result type more correct.
-
-    private fun IrBuilderWithScope.arrayGet(array: IrExpression, index: IrExpression): IrExpression? {
-        val elementType = array.type.arguments.single().type
-        val elementSize = sizeOf(elementType) ?: return null
-
-        val resultRawPtr = irCall(konanBuiltins.nativePtrPlusLong).apply {
-            dispatchReceiver = irCall(interop.cPointerGetRawValue).apply {
-                extensionReceiver = array
-            }
-            putValueArgument(0, times(elementSize, index))
-        }
-        return interpretPointed(resultRawPtr, elementType)
-    }
-
-    private fun IrBuilderWithScope.times(left: IrExpression, right: IrExpression): IrCall {
-        val times = left.type.memberScope.getSingleContributedFunction("times") {
-            right.type.isSubtypeOf(it.valueParameters.single().type)
-        }
-
-        return irCall(times).apply {
-            dispatchReceiver = left
-            putValueArgument(0, right)
-        }
-    }
-
-    private fun IrBuilderWithScope.alloc(placement: IrExpression, size: IrExpression, align: IrExpression): IrExpression {
-        val alloc = placement.type.memberScope.getSingleContributedFunction("alloc") {
-            size.type.isSubtypeOf(it.valueParameters[0]!!.type) &&
-                    align.type.isSubtypeOf(it.valueParameters[1]!!.type)
-        }
-
-        return irCall(alloc).apply {
-            dispatchReceiver = placement
-            putValueArgument(0, size)
-            putValueArgument(1, align)
-        }
-    }
-
-    @Suppress("UNUSED_PARAMETER")
-    private fun IrBuilderWithScope.nativePointedToCPointer(
-            expression: IrExpression, pointeeType: KotlinType
-    ): IrExpression = irCall(interop.interpretCPointer).apply {
-        putValueArgument(0, irCall(interop.nativePointedGetRawPointer).apply {
-            extensionReceiver = expression
-        })
-    }
-    // TODO: make the result type more correct.
-
-    private fun IrBuilderWithScope.allocArray(placement: IrExpression,
-                                              elementType: KotlinType,
-                                              length: IrExpression
-    ): IrExpression? {
-
-        val elementSize = sizeOf(elementType) ?: return null
-        val size = times(elementSize, length)
-        val align = alignOf(elementType) ?: return null
-
-        return nativePointedToCPointer(alloc(placement, size, align), elementType)
-    }
-
-    private fun IrBuilderWithScope.alloc(placement: IrExpression, type: KotlinType): IrExpression? {
-        val size = sizeOf(type) ?: return null
-        val align = alignOf(type) ?: return null
-
-        return alloc(placement, size, align)
-    }
-
-    private fun IrBuilderWithScope.readValue(receiver: IrExpression, typeArgument: KotlinType): IrCallImpl? {
-        val size = sizeOf(typeArgument) ?: return null
-        val align = alignOf(typeArgument) ?: return null
-
-        val callee = interop.readValueBySizeAndAlign
-        val typeParameter = callee.typeParameters.single()
-        val typeArguments = mapOf(typeParameter to typeArgument)
-
-        return irCall(callee, typeArguments).apply {
-            extensionReceiver = receiver
-            putValueArgument(0, size)
-            putValueArgument(1, align)
-        }
-    }
+    val symbols = context.ir.symbols
 
     override fun visitCall(expression: IrCall): IrExpression {
 
@@ -214,7 +107,7 @@ private class InteropTransformer(val context: Context, val irFile: IrFile) : IrB
                 OverridingUtil.overrides(descriptor, interop.nativePointedRawPtrGetter)) {
 
             // Replace by the intrinsic call to be handled by code generator:
-            return builder.irCall(interop.nativePointedGetRawPointer).apply {
+            return builder.irCall(symbols.interopNativePointedGetRawPointer).apply {
                 extensionReceiver = expression.dispatchReceiver
             }
         }
@@ -222,34 +115,10 @@ private class InteropTransformer(val context: Context, val irFile: IrFile) : IrB
         return when (descriptor) {
             interop.cPointerRawValue.getter ->
                 // Replace by the intrinsic call to be handled by code generator:
-                builder.irCall(interop.cPointerGetRawValue).apply {
+                builder.irCall(symbols.interopCPointerGetRawValue).apply {
                     extensionReceiver = expression.dispatchReceiver
                 }
 
-            interop.arrayGetByIntIndex, interop.arrayGetByLongIndex -> {
-                val array = expression.extensionReceiver!!
-                val index = expression.getValueArgument(0)!!
-                builder.arrayGet(array, index) ?: expression
-            }
-
-            interop.allocUninitializedArrayWithIntLength, interop.allocUninitializedArrayWithLongLength -> {
-                val placement = expression.extensionReceiver!!
-                val elementType = expression.type.arguments.single().type
-                val length = expression.getValueArgument(0)!!
-                builder.allocArray(placement, elementType, length) ?: expression
-            }
-
-            interop.allocVariable -> {
-                val placement = expression.extensionReceiver!!
-                val type = expression.getSingleTypeArgument()
-                builder.alloc(placement, type) ?: expression
-            }
-
-            interop.typeOf -> {
-                val type = expression.getSingleTypeArgument()
-                builder.typeOf(type) ?: expression
-            }
-
             interop.bitsToFloat -> {
                 val argument = expression.getValueArgument(0)
                 if (argument is IrConst<*> && argument.kind == IrConstKind.Int) {
@@ -270,13 +139,6 @@ private class InteropTransformer(val context: Context, val irFile: IrFile) : IrB
                 }
             }
 
-            interop.readValue -> {
-                val typeArgument = expression.getSingleTypeArgument()
-                val receiver = expression.extensionReceiver!!
-
-                builder.readValue(receiver, typeArgument) ?: expression
-            }
-
             in interop.staticCFunction -> {
                 val irCallableReference = unwrapStaticFunctionArgument(expression.getValueArgument(0)!!)
 
@@ -288,7 +150,8 @@ private class InteropTransformer(val context: Context, val irFile: IrFile) : IrB
                     // TODO: should probably be reported during analysis.
                 }
 
-                val target = irCallableReference.descriptor.original
+                val targetSymbol = irCallableReference.symbol
+                val target = targetSymbol.descriptor
                 val signatureTypes = target.allParameters.map { it.type } + target.returnType!!
 
                 signatureTypes.forEachIndexed { index, type ->
@@ -312,7 +175,7 @@ private class InteropTransformer(val context: Context, val irFile: IrFile) : IrB
                 IrFunctionReferenceImpl(
                         builder.startOffset, builder.endOffset,
                         expression.type,
-                        target,
+                        targetSymbol, target,
                         typeArguments = null)
             }
 
@@ -352,10 +215,14 @@ private class InteropTransformer(val context: Context, val irFile: IrFile) : IrB
                     else -> throw Error()
                 }
 
-                val conversionDescriptor = receiver.type.memberScope.getContributedFunctions(
-                        Name.identifier("to$typeOperand"), NoLookupLocation.FROM_BACKEND).single()
+                val receiverClass = symbols.integerClasses.single {
+                    receiver.type.isSubtypeOf(it.owner.defaultType)
+                }
+                val conversionSymbol = receiverClass.functions.single {
+                    it.descriptor.name == Name.identifier("to$typeOperand")
+                }
 
-                builder.irCall(conversionDescriptor).apply {
+                builder.irCall(conversionSymbol).apply {
                     dispatchReceiver = receiver
                 }
             }
@@ -415,11 +282,11 @@ private class InteropTransformer(val context: Context, val irFile: IrFile) : IrB
 
         return argument.statements.last() as? IrFunctionReference
     }
+}
 
-    private fun IrCall.getSingleTypeArgument(): KotlinType {
-        val typeParameter = descriptor.original.typeParameters.single()
-        return getTypeArgument(typeParameter)!!
-    }
+private fun IrCall.getSingleTypeArgument(): KotlinType {
+    val typeParameter = descriptor.original.typeParameters.single()
+    return getTypeArgument(typeParameter)!!
 }
 
 private fun IrBuilder.irFloat(value: Float) =

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/LateinitLowering.kt

@@ -19,19 +19,16 @@ package org.jetbrains.kotlin.backend.konan.lower
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
 import org.jetbrains.kotlin.backend.konan.Context
-import org.jetbrains.kotlin.backend.konan.descriptors.getKonanInternalFunctions
 import org.jetbrains.kotlin.backend.konan.isValueType
-import org.jetbrains.kotlin.descriptors.PropertyDescriptor
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.declarations.IrProperty
 import org.jetbrains.kotlin.ir.expressions.IrBlock
-import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.impl.IrBlockImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrExpressionBodyImpl
-import org.jetbrains.kotlin.ir.expressions.impl.IrGetFieldImpl
+import org.jetbrains.kotlin.ir.symbols.IrFieldSymbol
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.types.KotlinType
@@ -41,22 +38,24 @@ internal class LateinitLowering(val context: Context): FileLoweringPass {
         irFile.transformChildrenVoid(object: IrElementTransformerVoid() {
             override fun visitProperty(declaration: IrProperty): IrStatement {
                 if (declaration.descriptor.isLateInit)
-                    transformGetter(declaration.descriptor, declaration.getter!!)
+                    transformGetter(declaration.backingField!!.symbol, declaration.getter!!)
                 return declaration
             }
 
-            private fun transformGetter(propertyDescriptor: PropertyDescriptor, getter: IrFunction) {
-                assert (!propertyDescriptor.type.isValueType(), { "'lateinit' modifier is not allowed on value types" })
+            private fun transformGetter(backingFieldSymbol: IrFieldSymbol, getter: IrFunction) {
+                val type = backingFieldSymbol.descriptor.type
+                assert (!type.isValueType(), { "'lateinit' modifier is not allowed on value types" })
                 val startOffset = getter.startOffset
                 val endOffset = getter.endOffset
-                val irBuilder = context.createIrBuilder(getter.descriptor, startOffset, endOffset)
+                val irBuilder = context.createIrBuilder(getter.symbol, startOffset, endOffset)
                 irBuilder.run {
-                    val block = irBlock(propertyDescriptor.type)
-                    val resultVar = scope.createTemporaryVariable(irGetField(irThis(), propertyDescriptor))
+                    val block = irBlock(type)
+                    val resultVar = scope.createTemporaryVariable(
+                            irGetField(irGet(getter.dispatchReceiverParameter!!.symbol), backingFieldSymbol))
                     block.statements.add(resultVar)
                     val throwIfNull = irIfThenElse(context.builtIns.nothingType,
-                            irNotEquals(irGet(resultVar.descriptor), irNull()),
-                            irReturn(irGet(resultVar.descriptor)),
+                            irNotEquals(irGet(resultVar.symbol), irNull()),
+                            irReturn(irGet(resultVar.symbol)),
                             irCall(throwErrorFunction))
                     block.statements.add(throwIfNull)
                     getter.body = IrExpressionBodyImpl(startOffset, endOffset, block)
@@ -65,11 +64,9 @@ internal class LateinitLowering(val context: Context): FileLoweringPass {
         })
     }
 
-    private val throwErrorFunction = context.builtIns.getKonanInternalFunctions("ThrowUninitializedPropertyAccessException").single()
+    private val throwErrorFunction = context.ir.symbols.ThrowUninitializedPropertyAccessException
 
     private fun IrBuilderWithScope.irBlock(type: KotlinType): IrBlock
             = IrBlockImpl(startOffset, endOffset, type)
 
-    private fun IrBuilderWithScope.irGetField(receiver: IrExpression?, property: PropertyDescriptor): IrExpression
-            = IrGetFieldImpl(startOffset, endOffset, property, receiver)
 }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/SuspendFunctionsLowering.kt

@@ -21,9 +21,7 @@ import org.jetbrains.kotlin.backend.common.descriptors.explicitParameters
 import org.jetbrains.kotlin.backend.common.lower.*
 import org.jetbrains.kotlin.backend.common.*
 import org.jetbrains.kotlin.backend.konan.Context
-import org.jetbrains.kotlin.backend.konan.descriptors.getKonanInternalClass
 import org.jetbrains.kotlin.backend.konan.descriptors.getKonanInternalFunctions
-import org.jetbrains.kotlin.backend.konan.descriptors.isSuspendFunctionInvoke
 import org.jetbrains.kotlin.backend.konan.descriptors.synthesizedName
 import org.jetbrains.kotlin.backend.konan.ir.*
 import org.jetbrains.kotlin.backend.konan.util.atMostOne
@@ -43,9 +41,6 @@ import org.jetbrains.kotlin.ir.symbols.*
 import org.jetbrains.kotlin.ir.symbols.impl.IrConstructorSymbolImpl
 import org.jetbrains.kotlin.ir.symbols.impl.IrSimpleFunctionSymbolImpl
 import org.jetbrains.kotlin.ir.symbols.impl.IrVariableSymbolImpl
-import org.jetbrains.kotlin.ir.util.createParameterDeclarations
-import org.jetbrains.kotlin.ir.util.getArguments
-import org.jetbrains.kotlin.ir.util.transformFlat
 import org.jetbrains.kotlin.ir.visitors.*
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
@@ -53,6 +48,7 @@ import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.typeUtil.isUnit
 import org.jetbrains.kotlin.types.typeUtil.makeNotNullable
 import org.jetbrains.kotlin.backend.common.descriptors.*
+import org.jetbrains.kotlin.ir.util.*
 
 internal class SuspendFunctionsLowering(val context: Context): DeclarationContainerLoweringPass {
 
@@ -67,7 +63,6 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
             else null
         }
         transformCallableReferencesToSuspendLambdas(irDeclarationContainer)
-        transformCallsToExtensionSuspendFunctions(irDeclarationContainer)
     }
 
     private fun markSuspendLambdas(irDeclarationContainer: IrDeclarationContainer) {
@@ -116,36 +111,6 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
         }
     }
 
-    private fun transformCallsToExtensionSuspendFunctions(irDeclarationContainer: IrDeclarationContainer) {
-        irDeclarationContainer.declarations.forEach {
-            it.transformChildrenVoid(object: IrElementTransformerVoid() {
-
-                override fun visitCall(expression: IrCall): IrExpression {
-                    expression.transformChildrenVoid(this)
-
-                    val descriptor = expression.descriptor
-
-                    if (!descriptor.isSuspendFunctionInvoke || descriptor.extensionReceiverParameter == null)
-                        return expression
-
-                    val invokeFunctionDescriptor = descriptor.dispatchReceiverParameter!!.type.memberScope
-                            .getContributedFunctions(Name.identifier("invoke"), NoLookupLocation.FROM_BACKEND).single()
-                    return IrCallImpl(
-                            startOffset      = expression.startOffset,
-                            endOffset        = expression.endOffset,
-                            calleeDescriptor = invokeFunctionDescriptor
-                    ).apply {
-                        dispatchReceiver = expression.dispatchReceiver
-                        putValueArgument(0, expression.extensionReceiver)
-                        invokeFunctionDescriptor.valueParameters.drop(1).forEach {
-                            putValueArgument(it.index, expression.getValueArgument(it.index - 1))
-                        }
-                    }
-                }
-            })
-        }
-    }
-
     private enum class SuspendFunctionKind {
         NO_SUSPEND_CALLS,
         DELEGATING,
@@ -235,7 +200,8 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
         }
     }
 
-    private val getContinuationDescriptor = context.builtIns.getKonanInternalFunctions("getContinuation").single()
+    private val symbols = context.ir.symbols
+    private val getContinuationSymbol = symbols.getContinuation
     private val returnIfSuspendedDescriptor = context.builtIns.getKonanInternalFunctions("returnIfSuspended").single()
 
     private fun removeReturnIfSuspendedCall(irFunction: IrFunction) {
@@ -262,15 +228,15 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
                 +irReturn(
                         irCall(coroutine.doResumeFunction.symbol).apply {
                             dispatchReceiver = irCall(coroutine.coroutineConstructor.symbol).apply {
-                                val functionParameters = irFunction.descriptor.explicitParameters
+                                val functionParameters = irFunction.explicitParameters
                                 functionParameters.forEachIndexed { index, argument ->
                                     putValueArgument(index, irGet(argument))
                                 }
                                 putValueArgument(functionParameters.size,
-                                        irCall(getContinuationDescriptor.substitute(descriptor.returnType!!)))
+                                        irCall(getContinuationSymbol, listOf(descriptor.returnType!!)))
                             }
-                            putValueArgument(0, irUnit())       // value
-                            putValueArgument(1, irNull())       // exception
+                            putValueArgument(0, irGetObject(symbols.unit)) // value
+                            putValueArgument(1, irNull()) // exception
                         })
             }
         }
@@ -285,17 +251,13 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
     private var coroutineId = 0
 
     private val COROUTINES_FQ_NAME            = FqName.fromSegments(listOf("kotlin", "coroutines", "experimental"))
-    private val COROUTINES_INTRINSICS_FQ_NAME = FqName.fromSegments(listOf("kotlin", "coroutines", "experimental", "intrinsics"))
     private val KOTLIN_FQ_NAME                = FqName("kotlin")
 
     private val coroutinesScope           = context.irModule!!.descriptor.getPackage(COROUTINES_FQ_NAME).memberScope
-    private val coroutinesIntrinsicsScope = context.irModule!!.descriptor.getPackage(COROUTINES_INTRINSICS_FQ_NAME).memberScope
     private val kotlinPackageScope        = context.irModule!!.descriptor.getPackage(KOTLIN_FQ_NAME).memberScope
 
     private val continuationClassDescriptor = coroutinesScope
             .getContributedClassifier(Name.identifier("Continuation"), NoLookupLocation.FROM_BACKEND) as ClassDescriptor
-    private val COROUTINE_SUSPENDED = coroutinesIntrinsicsScope
-            .getContributedVariables(Name.identifier("COROUTINE_SUSPENDED"), NoLookupLocation.FROM_BACKEND).first()
 
     private inner class CoroutineBuilder(val irFunction: IrFunction, val functionReference: IrFunctionReference?) {
 
@@ -313,12 +275,17 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
         private lateinit var coroutineClassThis: IrValueParameterSymbol
         private lateinit var argumentToPropertiesMap: Map<ParameterDescriptor, IrFieldSymbol>
 
-        private val coroutineImplClassDescriptor = context.builtIns.getKonanInternalClass("CoroutineImpl")
+        private val coroutineImplSymbol = symbols.coroutineImpl
+        private val coroutineImplConstructorSymbol = coroutineImplSymbol.constructors.single()
+        private val coroutineImplClassDescriptor = coroutineImplSymbol.descriptor
         private val create1FunctionDescriptor = coroutineImplClassDescriptor.unsubstitutedMemberScope
                 .getContributedFunctions(Name.identifier("create"), NoLookupLocation.FROM_BACKEND)
                 .single { it.valueParameters.size == 1 }
         private val create1CompletionParameter = create1FunctionDescriptor.valueParameters[0]
 
+        private val coroutineImplLabelGetterSymbol = coroutineImplSymbol.getPropertyGetter("label")!!
+        private val coroutineImplLabelSetterSymbol = coroutineImplSymbol.getPropertySetter("label")!!
+
         fun build(): BuiltCoroutine {
             val superTypes = mutableListOf<KotlinType>(coroutineImplClassDescriptor.defaultType)
             var suspendFunctionClassDescriptor: ClassDescriptor? = null
@@ -406,6 +373,8 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
                     ).filterNotNull().toList()
             coroutineClassDescriptor.initialize(SimpleMemberScope(contributedDescriptors), constructors, null)
 
+            coroutineClass.addFakeOverrides()
+
             coroutineConstructorBuilder.initialize()
             coroutineClass.declarations.add(coroutineConstructorBuilder.ir)
 
@@ -437,8 +406,6 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
         private fun createConstructorBuilder()
                 = object : SymbolWithIrBuilder<IrConstructorSymbol, IrConstructor>() {
 
-            private val coroutineImplConstructorDescriptor = coroutineImplClassDescriptor.constructors.single()
-
             override fun buildSymbol() = IrConstructorSymbolImpl(
                     ClassConstructorDescriptorImpl.create(
                             /* containingDeclaration = */ coroutineClassDescriptor,
@@ -452,7 +419,7 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
                 val descriptor = symbol.descriptor as ClassConstructorDescriptorImpl
                 val constructorParameters = (
                         functionParameters
-                        + coroutineImplConstructorDescriptor.valueParameters[0] // completion.
+                        + coroutineImplConstructorSymbol.descriptor.valueParameters[0] // completion.
                         ).mapIndexed { index, parameter -> parameter.copyAsValueParameter(descriptor, index) }
 
                 descriptor.initialize(constructorParameters, Visibilities.PUBLIC)
@@ -478,7 +445,8 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
                     val irBuilder = context.createIrBuilder(symbol, startOffset, endOffset)
                     body = irBuilder.irBlockBody {
                         val completionParameter = valueParameters.last()
-                        +IrDelegatingConstructorCallImpl(startOffset, endOffset, coroutineImplConstructorDescriptor).apply {
+                        +IrDelegatingConstructorCallImpl(startOffset, endOffset,
+                                coroutineImplConstructorSymbol, coroutineImplConstructorSymbol.descriptor).apply {
                             putValueArgument(0, irGet(completionParameter.symbol))
                         }
                         +IrInstanceInitializerCallImpl(startOffset, endOffset, coroutineClass.symbol)
@@ -493,8 +461,6 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
         private fun createFactoryConstructorBuilder(boundParams: List<ParameterDescriptor>)
                 = object : SymbolWithIrBuilder<IrConstructorSymbol, IrConstructor>() {
 
-            private val coroutineImplConstructorDescriptor = coroutineImplClassDescriptor.constructors.single()
-
             override fun buildSymbol() = IrConstructorSymbolImpl(
                     ClassConstructorDescriptorImpl.create(
                             /* containingDeclaration = */ coroutineClassDescriptor,
@@ -526,7 +492,8 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
 
                     val irBuilder = context.createIrBuilder(symbol, startOffset, endOffset)
                     body = irBuilder.irBlockBody {
-                        +IrDelegatingConstructorCallImpl(startOffset, endOffset, coroutineImplConstructorDescriptor).apply {
+                        +IrDelegatingConstructorCallImpl(startOffset, endOffset,
+                                coroutineImplConstructorSymbol, coroutineImplConstructorSymbol.descriptor).apply {
                             putValueArgument(0, irNull()) // Completion.
                         }
                         +IrInstanceInitializerCallImpl(startOffset, endOffset, coroutineClass.symbol)
@@ -669,9 +636,9 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
                                             putValueArgument(index, irGet(parameter.symbol))
                                         }
                                         putValueArgument(valueParameters.size,
-                                                irCall(getContinuationDescriptor.substitute(symbol.descriptor.returnType!!)))
+                                                irCall(getContinuationSymbol, listOf(symbol.descriptor.returnType!!)))
                                     }
-                                    putValueArgument(0, irUnit())       // value
+                                    putValueArgument(0, irGetObject(symbols.unit))       // value
                                     putValueArgument(1, irNull())       // exception
                                 }
                         )
@@ -803,7 +770,10 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
                                                 scope.forEach {
                                                     +irSetField(irGet(coroutineClassThis), localToPropertyMap[it]!!, irGet(localsMap[it.descriptor] ?: it))
                                                 }
-                                                +irSet(irGet(coroutineClassThis), label, irGet(suspensionPoint.suspensionPointIdParameter.symbol))
+                                                +irCall(coroutineImplLabelSetterSymbol).apply {
+                                                    dispatchReceiver = irGet(coroutineClassThis)
+                                                    putValueArgument(0, irGet(suspensionPoint.suspensionPointIdParameter.symbol))
+                                                }
                                             }
                                         }
                                         restoreStateSymbol -> {
@@ -828,13 +798,15 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
                             startOffset       = startOffset,
                             endOffset         = endOffset,
                             type              = context.builtIns.unitType,
-                            suspensionPointId = irGet(irGet(coroutineClassThis), label),
+                            suspensionPointId = irCall(coroutineImplLabelGetterSymbol).apply {
+                                dispatchReceiver = irGet(coroutineClassThis)
+                            },
                             result            = irBlock(startOffset, endOffset) {
                                 +irThrowIfNotNull(exceptionArgument)    // Coroutine might start with an exception.
                                 statements.forEach { +it }
                             })
                     if (irFunction.descriptor.returnType!!.isUnit())
-                        +irReturn(irUnit())                             // Insert explicit return for Unit functions.
+                        +irReturn(irGetObject(symbols.unit))                             // Insert explicit return for Unit functions.
                 }
                 return function
             }
@@ -1156,7 +1128,7 @@ internal class SuspendFunctionsLowering(val context: Context): DeclarationContai
                 }
 
         private fun IrBuilderWithScope.irReturnIfSuspended(value: IrValueSymbol) =
-                irIfThen(irEqeqeq(irGet(value), irGet(COROUTINE_SUSPENDED)),
+                irIfThen(irEqeqeq(irGet(value), irCall(symbols.coroutineSuspendedGetter)),
                         irReturn(irGet(value)))
 
         private fun IrBuilderWithScope.irThrowIfNotNull(exception: IrValueSymbol) =

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/VarargLowering.kt

@@ -23,47 +23,50 @@ import org.jetbrains.kotlin.backend.konan.descriptors.synthesizedString
 import org.jetbrains.kotlin.backend.konan.ir.ir2string
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.builtins.PrimitiveType
-import org.jetbrains.kotlin.descriptors.*
-import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.ir.IrElement
-import org.jetbrains.kotlin.ir.builders.IrBuilderWithScope
-import org.jetbrains.kotlin.ir.builders.Scope
-import org.jetbrains.kotlin.ir.builders.irGet
-import org.jetbrains.kotlin.ir.builders.irSetVar
+import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.IrBlockImpl
-import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrConstImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrVarargImpl
+import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
+import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
+import org.jetbrains.kotlin.ir.symbols.IrSymbol
 import org.jetbrains.kotlin.ir.symbols.IrVariableSymbol
+import org.jetbrains.kotlin.ir.util.constructors
+import org.jetbrains.kotlin.ir.util.defaultType
+import org.jetbrains.kotlin.ir.util.functions
+import org.jetbrains.kotlin.ir.util.getPropertyGetter
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
-import org.jetbrains.kotlin.name.FqName
-import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.DescriptorUtils
-import org.jetbrains.kotlin.resolve.descriptorUtil.module
 import org.jetbrains.kotlin.types.KotlinType
+import org.jetbrains.kotlin.util.OperatorNameConventions
 
 
 class VarargInjectionLowering internal constructor(val context: Context): DeclarationContainerLoweringPass {
     override fun lower(irDeclarationContainer: IrDeclarationContainer) {
         irDeclarationContainer.declarations.forEach{
             when (it) {
-                is IrField    -> lower(it.descriptor, it.initializer)
-                is IrFunction -> lower(it.descriptor, it.body)
+                is IrField    -> lower(it.symbol, it.initializer)
+                is IrFunction -> lower(it.symbol, it.body)
                 is IrProperty -> {
-                    lower(it.descriptor, it.backingField)
-                    if (it.getter != null)
-                        lower(it.getter!!.descriptor, it.getter)
-                    if (it.setter != null)
-                        lower(it.setter!!.descriptor, it.setter)
+                    it.backingField?.let { field ->
+                        lower(field.symbol, field)
+                    }
+                    it.getter?.let { getter ->
+                        lower(getter.symbol, getter)
+                    }
+                    it.setter?.let { setter ->
+                        lower(setter.symbol, setter)
+                    }
                 }
             }
         }
     }
 
-    private fun lower(owner:DeclarationDescriptor, element: IrElement?) {
+    private fun lower(owner: IrSymbol, element: IrElement?) {
         element?.transformChildrenVoid(object: IrElementTransformerVoid() {
             val transformer = this
 
@@ -107,11 +110,13 @@ class VarargInjectionLowering internal constructor(val context: Context): Declar
                     val type = expression.varargElementType
                     log("$expression: array type:$type, is array of primitives ${!KotlinBuiltIns.isArray(expression.type)}")
                     val arrayHandle = arrayType(expression.type)
-                    val arrayConstructor = arrayHandle.arrayDescriptor.constructors.find { it.valueParameters.size == 1 }!!
-                    val block = irBlock(arrayHandle.arrayDescriptor.defaultType)
-                    val arrayConstructorCall = irCall(
-                            descriptor = arrayConstructor,
-                            typeArguments = typeArgument(arrayConstructor, type))
+                    val arrayConstructor = arrayHandle.arraySymbol.constructors.find { it.owner.valueParameters.size == 1 }!!
+                    val block = irBlock(arrayHandle.arraySymbol.owner.defaultType)
+                    val arrayConstructorCall = if (arrayConstructor.owner.typeParameters.isEmpty()) {
+                        irCall(arrayConstructor)
+                    } else {
+                        irCall(arrayConstructor, listOf(type))
+                    }
 
 
                     val vars = expression.elements.map {
@@ -135,10 +140,7 @@ class VarargInjectionLowering internal constructor(val context: Context): Declar
                             log("element:$i> ${ir2string(element)}")
                             val dst = vars[element]!!
                             if (element !is IrSpreadElement) {
-                                val setArrayElementCall = irCall(
-                                        descriptor    = arrayHandle.setMethodDescriptor,
-                                        typeArguments = null
-                                )
+                                val setArrayElementCall = irCall(arrayHandle.setMethodSymbol)
                                 setArrayElementCall.dispatchReceiver = irGet(arrayTmpVariable.symbol)
                                 setArrayElementCall.putValueArgument(0, if (hasSpreadElement) irGet(indexTmpVariable.symbol) else irConstInt(i))
                                 setArrayElementCall.putValueArgument(1, irGet(dst.symbol))
@@ -149,7 +151,7 @@ class VarargInjectionLowering internal constructor(val context: Context): Declar
                             } else {
                                 val arraySizeVariable = scope.createTemporaryVariable(irArraySize(arrayHandle, irGet(dst.symbol)), "length".synthesizedString)
                                 block.statements.add(arraySizeVariable)
-                                val copyCall = irCall(arrayHandle.copyRangeToDescriptor, null).apply {
+                                val copyCall = irCall(arrayHandle.copyRangeToSymbol).apply {
                                     extensionReceiver = irGet(dst.symbol)
                                     putValueArgument(0, irGet(arrayTmpVariable.symbol))  /* destination */
                                     putValueArgument(1, kIntZero)                            /* fromIndex */
@@ -170,13 +172,8 @@ class VarargInjectionLowering internal constructor(val context: Context): Declar
         })
     }
 
-
-    private fun typeArgument(arrayConstructor: ClassConstructorDescriptor, type: KotlinType):Map<TypeParameterDescriptor, KotlinType>? {
-        return if (!arrayConstructor.typeParameters.isEmpty())
-            mapOf(arrayConstructor.typeParameters.first() to type)
-        else
-            null
-    }
+    private val symbols = context.ir.symbols
+    private val intPlusInt = symbols.intPlusInt
 
     private fun arrayType(type: KotlinType): ArrayHandle = when {
         KotlinBuiltIns.isPrimitiveArray(type) -> {
@@ -196,7 +193,7 @@ class VarargInjectionLowering internal constructor(val context: Context): Declar
         else -> kArrayHandler
     }
 
-    private fun IrBuilderWithScope.intPlus() = irCall(kIntPlusDescriptor, null)
+    private fun IrBuilderWithScope.intPlus() = irCall(intPlusInt)
     private fun IrBuilderWithScope.increment(expression: IrExpression, value: IrExpression): IrExpression {
         return intPlus().apply {
             dispatchReceiver = expression
@@ -211,7 +208,7 @@ class VarargInjectionLowering internal constructor(val context: Context): Declar
         })
     }
     private fun calculateArraySize(arrayHandle: ArrayHandle, hasSpreadElement: Boolean, scope:Scope, expression: IrVararg, vars: Map<IrVarargElement, IrVariable>): IrExpression? {
-        context.createIrBuilder(scope.scopeOwner, expression.startOffset, expression.endOffset).run {
+        context.createIrBuilder(scope.scopeOwnerSymbol, expression.startOffset, expression.endOffset).run {
             if (!hasSpreadElement)
                 return irConstInt(expression.elements.size)
             val notSpreadElementCount = expression.elements.filter { it !is IrSpreadElement}.size
@@ -224,7 +221,7 @@ class VarargInjectionLowering internal constructor(val context: Context): Declar
     }
 
     private fun IrBuilderWithScope.irArraySize(arrayHandle: ArrayHandle, expression: IrExpression): IrExpression {
-        val arraySize = irCall((arrayHandle.sizeDescriptor as PropertyDescriptor).getter as FunctionDescriptor, null).apply {
+        val arraySize = irCall(arrayHandle.sizeGetterSymbol).apply {
             dispatchReceiver = expression
         }
         return arraySize
@@ -237,48 +234,31 @@ class VarargInjectionLowering internal constructor(val context: Context): Declar
         context.log{"VARARG-INJECTOR:    $msg"}
     }
 
-    data class ArrayHandle(val arrayDescriptor:ClassDescriptor,
-                           val setMethodDescriptor: FunctionDescriptor,
-                           val sizeDescriptor:DeclarationDescriptor,
-                           val copyRangeToDescriptor:FunctionDescriptor)
-    val kKotlinPackage       = context.builtIns.builtInsModule.getPackage(FqName("kotlin"))
-    val kByteArrayHandler    = handle(arrayClassDescriptor("ByteArray"))
-    val kCharArrayHandler    = handle(arrayClassDescriptor("CharArray"))
-    val kShortArrayHandler   = handle(arrayClassDescriptor("ShortArray"))
-    val kIntArrayHandler     = handle(arrayClassDescriptor("IntArray"))
-    val kLongArrayHandler    = handle(arrayClassDescriptor("LongArray"))
-    val kFloatArrayHandler   = handle(arrayClassDescriptor("FloatArray"))
-    val kDoubleArrayHandler  = handle(arrayClassDescriptor("DoubleArray"))
-    val kBooleanArrayHandler = handle(arrayClassDescriptor("BooleanArray"))
-    val kArrayHandler        = handle(context.builtIns.array)
+    data class ArrayHandle(val arraySymbol: IrClassSymbol,
+                           val setMethodSymbol: IrFunctionSymbol,
+                           val sizeGetterSymbol: IrFunctionSymbol,
+                           val copyRangeToSymbol: IrFunctionSymbol)
 
-    val kInt               = context.builtIns.int
-    val kIntType           =  context.builtIns.intType
-    val kIntPlusDescriptor = DescriptorUtils.getAllDescriptors(kInt.unsubstitutedMemberScope).find {
-                        it.name.asString() == "plus"
-                    && (it as FunctionDescriptor).valueParameters[0].type == kIntType} as FunctionDescriptor
+    val kByteArrayHandler    = handle(symbols.byteArray)
+    val kCharArrayHandler    = handle(symbols.charArray)
+    val kShortArrayHandler   = handle(symbols.shortArray)
+    val kIntArrayHandler     = handle(symbols.intArray)
+    val kLongArrayHandler    = handle(symbols.longArray)
+    val kFloatArrayHandler   = handle(symbols.floatArray)
+    val kDoubleArrayHandler  = handle(symbols.doubleArray)
+    val kBooleanArrayHandler = handle(symbols.booleanArray)
+    val kArrayHandler        = handle(symbols.array)
 
-    private fun handle(descriptor:ClassDescriptor) = ArrayHandle(
-            arrayDescriptor       = descriptor,
-            setMethodDescriptor   = setMethodDescriptor(descriptor),
-            sizeDescriptor        = sizeMethodDescriptor(descriptor)!!,
-            copyRangeToDescriptor = copyRangeToFunctionDescriptor(descriptor))
+    private fun handle(symbol: IrClassSymbol) = ArrayHandle(
+            arraySymbol = symbol,
+            setMethodSymbol = symbol.functions.single { it.descriptor.name == OperatorNameConventions.SET },
+            sizeGetterSymbol = symbol.getPropertyGetter("size")!!,
+            copyRangeToSymbol = symbols.copyRangeTo[symbol.descriptor]!!
+    )
 
-    private fun copyRangeToFunctionDescriptor(descriptor: ClassDescriptor): FunctionDescriptor {
-        val packageViewDescriptor = descriptor.module.getPackage(KotlinBuiltIns.COLLECTIONS_PACKAGE_FQ_NAME)
-        return packageViewDescriptor.memberScope.getContributedFunctions(Name.identifier("copyRangeTo"), NoLookupLocation.FROM_BACKEND).first {
-            it.extensionReceiverParameter?.type?.constructor?.declarationDescriptor == descriptor
-        }
-    }
-    private fun setMethodDescriptor(descriptor:ClassDescriptor) = methodDescriptor(descriptor, "set")
-    private fun sizeMethodDescriptor(descriptor:ClassDescriptor) = descriptor(descriptor, "size")
-    private fun methodDescriptor(descriptor:ClassDescriptor, methodName:String) = DescriptorUtils.getFunctionByName(descriptor.unsubstitutedMemberScope, Name.identifier(methodName))
-    private fun arrayClassDescriptor(name:String) = kKotlinPackage.memberScope.getContributedClassifier(Name.identifier(name), NoLookupLocation.FROM_BACKEND) as ClassDescriptor
-    private fun descriptor(descriptor: ClassDescriptor, name:String) = DescriptorUtils.getAllDescriptors(descriptor.unsubstitutedMemberScope).find{it.name.asString() == name}
 }
 
 private fun IrBuilderWithScope.irConstInt(value: Int): IrConst<Int> = IrConstImpl.int(startOffset, endOffset, context.builtIns.intType, value)
 private fun IrBuilderWithScope.irBlock(type: KotlinType): IrBlock = IrBlockImpl(startOffset, endOffset, type)
-private fun IrBuilderWithScope.irCall(descriptor: FunctionDescriptor, typeArguments: Map<TypeParameterDescriptor, KotlinType>?): IrCall = IrCallImpl(startOffset, endOffset, descriptor, typeArguments)
 private val IrBuilderWithScope.kIntZero get() = irConstInt(0)
 private val IrBuilderWithScope.kIntOne get() = irConstInt(1)

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/SerializeIr.kt

@@ -37,6 +37,7 @@ import org.jetbrains.kotlin.ir.declarations.impl.IrVariableImpl
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.*
 import org.jetbrains.kotlin.ir.symbols.impl.createFunctionSymbol
+import org.jetbrains.kotlin.ir.util.addFakeOverrides
 import org.jetbrains.kotlin.ir.util.createParameterDeclarations
 import org.jetbrains.kotlin.serialization.KonanDescriptorSerializer
 import org.jetbrains.kotlin.serialization.KonanIr
@@ -1057,6 +1058,7 @@ internal class IrDeserializer(val context: Context,
         val clazz = IrClassImpl(start, end, origin, descriptor, members)
 
         clazz.createParameterDeclarations()
+        clazz.addFakeOverrides()
 
         return clazz
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/SerializerVisitor.kt

@@ -35,7 +35,6 @@ import org.jetbrains.kotlin.backend.konan.PhaseManager
 import org.jetbrains.kotlin.backend.konan.KonanPhase
 import org.jetbrains.kotlin.serialization.MutableTypeTable
 import org.jetbrains.kotlin.serialization.KonanLinkData
-import org.jetbrains.kotlin.backend.common.validateIrFunction
 
 internal class DeserializerDriver(val context: Context) {
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/builders/IrBuilders.kt

@@ -16,33 +16,17 @@
 
 package org.jetbrains.kotlin.ir.builders
 
-import org.jetbrains.kotlin.descriptors.*
-import org.jetbrains.kotlin.ir.declarations.IrClass
-import org.jetbrains.kotlin.ir.declarations.IrConstructor
-import org.jetbrains.kotlin.ir.declarations.IrFunction
-import org.jetbrains.kotlin.ir.expressions.IrCall
+import org.jetbrains.kotlin.backend.common.descriptors.substitute
+import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.IrLoop
 import org.jetbrains.kotlin.ir.expressions.IrStatementOrigin
 import org.jetbrains.kotlin.ir.expressions.impl.*
+import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.IrFieldSymbol
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
+import org.jetbrains.kotlin.ir.util.defaultType
 import org.jetbrains.kotlin.types.KotlinType
-import org.jetbrains.kotlin.types.TypeProjectionImpl
-import org.jetbrains.kotlin.types.TypeSubstitutor
-
-inline fun IrBuilderWithScope.irLetSequence(
-        value: IrExpression,
-        nameHint: String? = null,
-        startOffset: Int = this.startOffset,
-        endOffset: Int = this.endOffset,
-        origin: IrStatementOrigin? = null,
-        resultType: KotlinType? = null,
-        body: IrBlockBuilder.(VariableDescriptor) -> Unit
-): IrExpression = irBlock(startOffset, endOffset, origin, resultType) {
-    val irTemporary = defineTemporary(value, nameHint)
-    this.body(irTemporary)
-}
 
 fun IrBuilderWithScope.irWhile(origin: IrStatementOrigin? = null) =
         IrWhileLoopImpl(startOffset, endOffset, context.builtIns.unitType, origin)
@@ -57,46 +41,18 @@ fun IrBuilderWithScope.irTrue() = IrConstImpl.boolean(startOffset, endOffset, co
 
 fun IrBuilderWithScope.irFalse() = IrConstImpl.boolean(startOffset, endOffset, context.builtIns.booleanType, false)
 
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irGet(value: ValueDescriptor) =
-        IrGetValueImpl(startOffset, endOffset, value)
-
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irGet(receiver: IrExpression?, property: PropertyDescriptor): IrCall =
-        IrCallImpl(startOffset, endOffset, property.getter!!).apply {
-            dispatchReceiver = receiver
-        }
-
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irThis() =
-        scope.classOwner().let { classOwner ->
-            IrGetValueImpl(startOffset, endOffset, classOwner.thisAsReceiverParameter)
-        }
-
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irSetVar(variable: VariableDescriptor, value: IrExpression) =
-        IrSetVariableImpl(startOffset, endOffset, variable, value, IrStatementOrigin.EQ)
-
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irCall(descriptor: FunctionDescriptor): IrCallImpl {
-    return IrCallImpl(this.startOffset, this.endOffset, descriptor)
-}
-
 fun IrBuilderWithScope.irCall(symbol: IrFunctionSymbol): IrCallImpl {
     return IrCallImpl(this.startOffset, this.endOffset, symbol)
 }
 
-@Deprecated("Creates unbound symbol")
-fun IrBuilderWithScope.irCall(
-        callee: FunctionDescriptor,
-        typeArguments: Map<TypeParameterDescriptor, KotlinType>
-): IrCallImpl {
-    val substitutionContext = typeArguments.map { (typeParameter, typeArgument) ->
-        typeParameter.typeConstructor to TypeProjectionImpl(typeArgument)
-    }.toMap()
+fun IrBuilderWithScope.irCall(symbol: IrFunctionSymbol, typeArguments: Map<TypeParameterDescriptor, KotlinType>) =
+        IrCallImpl(this.startOffset, this.endOffset, symbol, symbol.descriptor.substitute(typeArguments), typeArguments)
 
-    val substitutor = TypeSubstitutor.create(substitutionContext)
-    val substitutedCallee = callee.substitute(substitutor)!!
+fun IrBuilderWithScope.irCall(symbol: IrFunctionSymbol, typeArguments: List<KotlinType>) =
+    irCall(symbol, symbol.descriptor.typeParameters.zip(typeArguments).toMap())
 
-    return IrCallImpl(this.startOffset, this.endOffset, substitutedCallee, typeArguments)
-}
+fun IrBuilderWithScope.irGetObject(classSymbol: IrClassSymbol) =
+        IrGetObjectValueImpl(startOffset, endOffset, classSymbol.owner.defaultType, classSymbol)
+
+fun IrBuilderWithScope.irGetField(receiver: IrExpression?, symbol: IrFieldSymbol) =
+        IrGetFieldImpl(startOffset, endOffset, symbol, receiver)

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/util/IrUtils.kt

@@ -16,20 +16,19 @@
 
 package org.jetbrains.kotlin.ir.util
 
+import org.jetbrains.kotlin.backend.konan.util.atMostOne
 import org.jetbrains.kotlin.cli.common.messages.CompilerMessageLocation
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptorWithSource
-import org.jetbrains.kotlin.descriptors.ParameterDescriptor
-import org.jetbrains.kotlin.descriptors.ValueParameterDescriptor
+import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.declarations.*
+import org.jetbrains.kotlin.ir.declarations.impl.IrFunctionImpl
+import org.jetbrains.kotlin.ir.declarations.impl.IrPropertyImpl
 import org.jetbrains.kotlin.ir.declarations.impl.IrTypeParameterImpl
 import org.jetbrains.kotlin.ir.declarations.impl.IrValueParameterImpl
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.symbols.*
-import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
-import org.jetbrains.kotlin.ir.visitors.acceptChildrenVoid
-import org.jetbrains.kotlin.ir.visitors.acceptVoid
+import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.psiUtil.endOffset
 import org.jetbrains.kotlin.psi.psiUtil.startOffset
 import org.jetbrains.kotlin.resolve.source.PsiSourceElement
@@ -175,6 +174,35 @@ fun IrClass.createParameterDeclarations() {
     }
 }
 
+fun IrClass.addFakeOverrides() {
+
+    val startOffset = this.startOffset
+    val endOffset = this.endOffset
+
+    fun FunctionDescriptor.createFunction(): IrFunction = IrFunctionImpl(
+            startOffset, endOffset,
+            IrDeclarationOrigin.FAKE_OVERRIDE, this
+    ).apply {
+        createParameterDeclarations()
+    }
+
+    descriptor.unsubstitutedMemberScope.getContributedDescriptors()
+            .filterIsInstance<CallableMemberDescriptor>()
+            .filter { it.kind == CallableMemberDescriptor.Kind.FAKE_OVERRIDE }
+            .mapTo(this.declarations) {
+                when (it) {
+                    is FunctionDescriptor -> it.createFunction()
+                    is PropertyDescriptor ->
+                        IrPropertyImpl(startOffset, endOffset, IrDeclarationOrigin.FAKE_OVERRIDE, it).apply {
+                            // TODO: add field if getter is missing?
+                            getter = it.getter?.createFunction()
+                            setter = it.setter?.createFunction()
+                        }
+                    else -> TODO(it.toString())
+                }
+            }
+}
+
 private fun IrElement.innerStartOffset(descriptor: DeclarationDescriptorWithSource): Int =
         descriptor.startOffset ?: this.startOffset
 
@@ -193,6 +221,16 @@ val IrClassSymbol.functions: Sequence<IrSimpleFunctionSymbol>
 val IrClassSymbol.constructors: Sequence<IrConstructorSymbol>
     get() = this.owner.declarations.asSequence().filterIsInstance<IrConstructor>().map { it.symbol }
 
+private fun IrClassSymbol.getPropertyDeclaration(name: String) =
+        this.owner.declarations.filterIsInstance<IrProperty>()
+                .atMostOne { it.descriptor.name == Name.identifier(name) }
+
+fun IrClassSymbol.getPropertyGetter(name: String): IrFunctionSymbol? =
+        this.getPropertyDeclaration(name)?.getter?.symbol
+
+fun IrClassSymbol.getPropertySetter(name: String): IrFunctionSymbol? =
+        this.getPropertyDeclaration(name)?.setter?.symbol
+
 val IrFunction.explicitParameters: List<IrValueParameterSymbol>
     get() = (listOfNotNull(dispatchReceiverParameter, extensionReceiverParameter) + valueParameters).map { it.symbol }
 
@@ -201,68 +239,3 @@ val IrValueParameter.type: KotlinType
 
 val IrClass.defaultType: KotlinType
     get() = this.descriptor.defaultType
-
-class IrSymbolBindingChecker : IrElementVisitorVoid {
-    override fun visitElement(element: IrElement) {
-        element.acceptChildrenVoid(this)
-    }
-
-    override fun visitDeclarationReference(expression: IrDeclarationReference) {
-        super.visitDeclarationReference(expression)
-
-        expression.symbol.ensureBound(expression)
-    }
-
-    override fun visitFunctionAccess(expression: IrFunctionAccessExpression) {
-        super.visitFunctionAccess(expression)
-
-        expression.symbol.ensureBound(expression)
-    }
-
-    override fun visitFunctionReference(expression: IrFunctionReference) {
-        super.visitFunctionReference(expression)
-
-        expression.symbol.ensureBound(expression)
-    }
-
-    override fun visitCall(expression: IrCall) {
-        super.visitCall(expression)
-
-        expression.superQualifierSymbol?.ensureBound(expression)
-    }
-
-    override fun visitPropertyReference(expression: IrPropertyReference) {
-        super.visitPropertyReference(expression)
-
-        expression.field?.ensureBound(expression)
-        expression.getter?.ensureBound(expression)
-        expression.setter?.ensureBound(expression)
-    }
-
-    override fun visitLocalDelegatedPropertyReference(expression: IrLocalDelegatedPropertyReference) {
-        super.visitLocalDelegatedPropertyReference(expression)
-
-        expression.delegate.ensureBound(expression)
-        expression.getter.ensureBound(expression)
-        expression.setter?.ensureBound(expression)
-    }
-
-    override fun visitReturn(expression: IrReturn) {
-        super.visitReturn(expression)
-
-        expression.returnTargetSymbol.ensureBound(expression)
-    }
-
-    override fun visitInstanceInitializerCall(expression: IrInstanceInitializerCall) {
-        super.visitInstanceInitializerCall(expression)
-
-        expression.classSymbol.ensureBound(expression)
-    }
-
-    private fun IrSymbol.ensureBound(expression: IrExpression) {
-        if (!this.isBound) {
-            throw Error("Unbound symbol ${this} found in ${expression.render()}")
-        }
-    }
-
-}

gradle.properties

@@ -24,5 +24,5 @@ testDataVersion=1067176:id
 kotlinCompilerRepo=http://dl.bintray.com/jetbrains/kotlin-native-dependencies
 #kotlinCompilerRepo=http://oss.sonatype.org/content/repositories/snapshots
 #kotlinCompilerRepo=http://dl.bintray.com/kotlin/kotlin-dev
-kotlinCompilerModule=org.jetbrains.kotlin:kotlin-compiler:1.1-20170519.065155-538
+kotlinCompilerModule=org.jetbrains.kotlin:kotlin-compiler:1.1-20170521.012435-545
 konanVersion=0.2