[JS IR BE] Implement type check

* IrTypeOperator lowering
 * runtime support
 * refactoring

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIntrinsics.kt

@@ -10,21 +10,22 @@ import org.jetbrains.kotlin.descriptors.annotations.Annotations
 import org.jetbrains.kotlin.descriptors.impl.SimpleFunctionDescriptorImpl
 import org.jetbrains.kotlin.descriptors.impl.TypeParameterDescriptorImpl
 import org.jetbrains.kotlin.ir.backend.js.utils.createValueParameter
-import org.jetbrains.kotlin.ir.backend.js.utils.getFunctions
 import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
 import org.jetbrains.kotlin.ir.descriptors.IrBuiltIns
 import org.jetbrains.kotlin.ir.util.DeclarationStubGenerator
-import org.jetbrains.kotlin.ir.util.SymbolTable
 import org.jetbrains.kotlin.js.resolve.JsPlatform.builtIns
-import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.KotlinTypeFactory
 import org.jetbrains.kotlin.types.Variance
 
-class JsIntrinsics(private val module: ModuleDescriptor, private val irBuiltIns: IrBuiltIns, symbolTable: SymbolTable) {
+class JsIntrinsics(
+    private val module: ModuleDescriptor,
+    private val irBuiltIns: IrBuiltIns,
+    context: JsIrBackendContext
+) {
 
-    private val stubBuilder = DeclarationStubGenerator(symbolTable, JsLoweredDeclarationOrigin.JS_INTRINSICS_STUB)
+    private val stubBuilder = DeclarationStubGenerator(context.symbolTable, JsLoweredDeclarationOrigin.JS_INTRINSICS_STUB)
 
     // Equality operations:
 
@@ -81,18 +82,45 @@ class JsIntrinsics(private val module: ModuleDescriptor, private val irBuiltIns:
     val jsPropertyGet = binOp("kPropertyGet")
     val jsPropertySet = tripleOp("kPropertySet", irBuiltIns.unit)
 
-    // Other:
+
+    // Type checks:
 
     val jsInstanceOf = binOpBool("jsInstanceOf")
+    val jsTypeOf = unOp("jsTypeOf", irBuiltIns.string)
 
-    val jsObjectCreate = defineObjectCreateIntrinsic()
 
-    val jsSetJSField = defineSetJSPropertyIntrinsic()
+    // Other:
 
-    val jsCode = module.getFunctions(FqName("kotlin.js.js")).singleOrNull()?.let { symbolTable.referenceFunction(it) }
+    val jsObjectCreate = defineObjectCreateIntrinsic() // Object.create
+    val jsSetJSField = defineSetJSPropertyIntrinsic() // till we don't have dynamic type we use intrinsic which sets a field with any name
+    val jsToJsType = defineToJsType() // creates name reference to KotlinType
+    val jsCode = context.getInternalFunctions("js").singleOrNull()?.let { context.symbolTable.referenceFunction(it) } // js("<code>")
 
     // Helpers:
 
+    private fun defineToJsType(): IrSimpleFunction {
+        val desc = SimpleFunctionDescriptorImpl.create(
+            module,
+            Annotations.EMPTY,
+            Name.identifier("\$toJSType\$"),
+            CallableMemberDescriptor.Kind.SYNTHESIZED,
+            SourceElement.NO_SOURCE
+        ).apply {
+
+            val typeParameter = TypeParameterDescriptorImpl.createWithDefaultBound(
+                this,
+                Annotations.EMPTY,
+                false,
+                Variance.INVARIANT,
+                Name.identifier("T"),
+                0
+            )
+            initialize(null, null, listOf(typeParameter), emptyList(), builtIns.anyType, Modality.FINAL, Visibilities.PUBLIC)
+        }
+
+        return stubBuilder.generateFunctionStub(desc)
+    }
+
     // TODO: unify how we create intrinsic symbols
     private fun defineObjectCreateIntrinsic(): IrSimpleFunction {
 
@@ -121,7 +149,6 @@ class JsIntrinsics(private val module: ModuleDescriptor, private val irBuiltIns:
         return stubBuilder.generateFunctionStub(desc)
     }
 
-
     private fun defineSetJSPropertyIntrinsic(): IrSimpleFunction {
         val returnType = irBuiltIns.unit
 

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIrBackendContext.kt

@@ -12,21 +12,23 @@ import org.jetbrains.kotlin.backend.common.ir.Ir
 import org.jetbrains.kotlin.backend.common.ir.Symbols
 import org.jetbrains.kotlin.backend.js.JsDescriptorsFactory
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
-import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.ir.IrElement
+import org.jetbrains.kotlin.ir.backend.js.utils.OperatorNames
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.descriptors.IrBuiltIns
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.IrConstructorSymbol
+import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
 import org.jetbrains.kotlin.ir.util.SymbolTable
 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
 
 class JsIrBackendContext(
     val module: ModuleDescriptor,
@@ -35,20 +37,31 @@ class JsIrBackendContext(
     irModuleFragment: IrModuleFragment
 ) : CommonBackendContext {
 
-    val intrinsics = JsIntrinsics(module, irBuiltIns, symbolTable)
-
     override val builtIns = module.builtIns
+
     override val sharedVariablesManager =
         JsSharedVariablesManager(builtIns, KnownPackageFragmentDescriptor(builtIns.builtInsModule, FqName("kotlin.js.internal")))
     override val descriptorsFactory = JsDescriptorsFactory()
-
     override val reflectionTypes: ReflectionTypes by lazy(LazyThreadSafetyMode.PUBLICATION) {
         // TODO
         ReflectionTypes(module, FqName("kotlin.reflect"))
     }
 
-    override val ir: Ir<CommonBackendContext> = object : Ir<CommonBackendContext>(this, irModuleFragment) {
+    private val internalPackageName = FqName("kotlin.js")
-        override val symbols: Symbols<CommonBackendContext> = object : Symbols<CommonBackendContext>(this@JsIrBackendContext, symbolTable) {
+    private val internalPackage = module.getPackage(internalPackageName)
+
+    val intrinsics = JsIntrinsics(module, irBuiltIns, this)
+
+    private val operatorMap = referenceOperators()
+
+    data class SecondaryCtorPair(val delegate: IrSimpleFunctionSymbol, val stub: IrSimpleFunctionSymbol)
+
+    val secondaryConstructorsMap = mutableMapOf<IrConstructorSymbol, SecondaryCtorPair>()
+
+    fun getOperatorByName(name: Name, type: KotlinType) = operatorMap[name]?.get(type)
+
+    override val ir = object : Ir<CommonBackendContext>(this, irModuleFragment) {
+        override val symbols = object : Symbols<CommonBackendContext>(this@JsIrBackendContext, symbolTable) {
 
             override fun calc(initializer: () -> IrClassSymbol): IrClassSymbol {
                 return object : IrClassSymbol {
@@ -63,13 +76,13 @@ class JsIrBackendContext(
                 get () = TODO("not implemented")
 
             override val ThrowNullPointerException
-                get () = TODO("not implemented")
+                get () = irBuiltIns.throwNpeSymbol
 
             override val ThrowNoWhenBranchMatchedException
-                get () = TODO("not implemented")
+                get () = irBuiltIns.noWhenBranchMatchedExceptionSymbol
 
             override val ThrowTypeCastException
-                get () = TODO("not implemented")
+                get () = irBuiltIns.throwCceSymbol
 
             override val ThrowUninitializedPropertyAccessException = symbolTable.referenceSimpleFunction(
                 irBuiltIns.defineOperator(
@@ -92,29 +105,30 @@ class JsIrBackendContext(
         override fun shouldGenerateHandlerParameterForDefaultBodyFun() = true
     }
 
-    data class SecondaryCtorPair(val delegate: IrSimpleFunctionSymbol, val stub: IrSimpleFunctionSymbol)
+    private fun referenceOperators() = OperatorNames.ALL.map { name ->
+        name to irBuiltIns.primitiveTypes.fold(mutableMapOf<KotlinType, IrFunctionSymbol>()) { m, t ->
+            val function = t.memberScope.getContributedFunctions(name, NoLookupLocation.FROM_BACKEND).singleOrNull()
+            function?.let { m.put(t, symbolTable.referenceSimpleFunction(it)) }
+            m
+        }
+    }.toMap()
 
-    val secondaryConstructorsMap = mutableMapOf<IrConstructorSymbol, SecondaryCtorPair>()
+    private fun findClass(memberScope: MemberScope, className: String) = findClass(memberScope, Name.identifier(className))
 
-    private fun find(memberScope: MemberScope, className: String): ClassDescriptor {
+    private fun findClass(memberScope: MemberScope, name: Name) =
-        return find(memberScope, Name.identifier(className))
+        memberScope.getContributedClassifier(name, NoLookupLocation.FROM_BACKEND) as ClassDescriptor
-    }
 
-    private fun find(memberScope: MemberScope, name: Name): ClassDescriptor {
+    private fun findFunctions(memberScope: MemberScope, className: String) =
-        return memberScope.getContributedClassifier(name, NoLookupLocation.FROM_BACKEND) as ClassDescriptor
+        findFunctions(memberScope, Name.identifier(className))
-    }
 
-    override fun getInternalClass(name: String): ClassDescriptor {
+    private fun findFunctions(memberScope: MemberScope, name: Name) =
-        return find(module.getPackage(FqName("kotlin.js")).memberScope, name)
+        memberScope.getContributedFunctions(name, NoLookupLocation.FROM_BACKEND).toList()
-    }
 
-    override fun getClass(fqName: FqName): ClassDescriptor {
+    override fun getInternalClass(name: String) = findClass(internalPackage.memberScope, name)
-        return find(module.getPackage(fqName.parent()).memberScope, fqName.shortName())
-    }
 
-    override fun getInternalFunctions(name: String): List<FunctionDescriptor> {
+    override fun getClass(fqName: FqName) = findClass(module.getPackage(fqName.parent()).memberScope, fqName.shortName())
-        TODO("not implemented")
+
-    }
+    override fun getInternalFunctions(name: String) = findFunctions(internalPackage.memberScope, name)
 
     override fun log(message: () -> String) {
         /*TODO*/

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/compiler.kt

@@ -9,10 +9,7 @@ import com.intellij.openapi.project.Project
 import org.jetbrains.kotlin.backend.common.lower.*
 import org.jetbrains.kotlin.backend.common.runOnFilePostfix
 import org.jetbrains.kotlin.config.CompilerConfiguration
-import org.jetbrains.kotlin.ir.backend.js.lower.BlockDecomposerLowering
+import org.jetbrains.kotlin.ir.backend.js.lower.*
-import org.jetbrains.kotlin.ir.backend.js.lower.CallableReferenceLowering
-import org.jetbrains.kotlin.ir.backend.js.lower.IntrinsicifyCallsLowering
-import org.jetbrains.kotlin.ir.backend.js.lower.SecondaryCtorLowering
 import org.jetbrains.kotlin.ir.backend.js.transformers.irToJs.IrModuleToJsTransformer
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.util.ExternalDependenciesGenerator
@@ -65,6 +62,7 @@ fun JsIrBackendContext.lower(file: IrFile) {
     InnerClassConstructorCallsLowering(this).runOnFilePostfix(file)
     PropertiesLowering().lower(file)
     InitializersLowering(this, JsLoweredDeclarationOrigin.CLASS_STATIC_INITIALIZER, false).runOnFilePostfix(file)
+    TypeOperatorLowering(this).lower(file)
     BlockDecomposerLowering(this).runOnFilePostfix(file)
     SecondaryCtorLowering(this).runOnFilePostfix(file)
     CallableReferenceLowering(this).lower(file)

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ir/IrArithBuilder.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.backend.js.ir
+
+import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
+import org.jetbrains.kotlin.ir.backend.js.utils.OperatorNames
+import org.jetbrains.kotlin.ir.expressions.IrExpression
+import org.jetbrains.kotlin.name.Name
+
+class JsIrArithBuilder(val context: JsIrBackendContext) {
+
+    val symbols = context.ir.symbols
+
+    private fun buildBinaryOperator(name: Name, l: IrExpression, r: IrExpression): IrExpression {
+        val symbol = context.getOperatorByName(name, l.type)!!
+        return JsIrBuilder.buildCall(symbol).apply {
+            dispatchReceiver = l
+            putValueArgument(0, r)
+        }
+    }
+
+    private fun buildUnaryOperator(name: Name, v: IrExpression): IrExpression {
+        val symbol = context.getOperatorByName(name, v.type)!!
+        return JsIrBuilder.buildCall(symbol).apply { dispatchReceiver = v }
+    }
+
+    fun add(l: IrExpression, r: IrExpression) = buildBinaryOperator(OperatorNames.ADD, l, r)
+    fun sub(l: IrExpression, r: IrExpression) = buildBinaryOperator(OperatorNames.SUB, l, r)
+    fun mul(l: IrExpression, r: IrExpression) = buildBinaryOperator(OperatorNames.MUL, l, r)
+    fun div(l: IrExpression, r: IrExpression) = buildBinaryOperator(OperatorNames.DIV, l, r)
+    fun mod(l: IrExpression, r: IrExpression) = buildBinaryOperator(OperatorNames.MOD, l, r)
+    fun and(l: IrExpression, r: IrExpression) = buildBinaryOperator(OperatorNames.AND, l, r)
+    fun or(l: IrExpression, r: IrExpression) = buildBinaryOperator(OperatorNames.OR, l, r)
+    fun shl(l: IrExpression, r: IrExpression) = buildBinaryOperator(OperatorNames.SHL, l, r)
+    fun shr(l: IrExpression, r: IrExpression) = buildBinaryOperator(OperatorNames.SHR, l, r)
+    fun shru(l: IrExpression, r: IrExpression) = buildBinaryOperator(OperatorNames.SHRU, l, r)
+    fun not(v: IrExpression): IrExpression = buildUnaryOperator(OperatorNames.NOT, v)
+    fun inv(v: IrExpression): IrExpression = buildUnaryOperator(OperatorNames.INV, v)
+
+    fun andand(l: IrExpression, r: IrExpression) = // if (l) r else false
+        JsIrBuilder.buildIfElse(context.builtIns.booleanType, l, r, JsIrBuilder.buildBoolean(context.builtIns.booleanType, false))
+    fun oror(l: IrExpression, r: IrExpression) = // if (l) true else r
+        JsIrBuilder.buildIfElse(context.builtIns.booleanType, l, JsIrBuilder.buildBoolean(context.builtIns.booleanType, true), r)
+}

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ir/IrBuilder.kt

@@ -78,5 +78,6 @@ object JsIrBuilder {
 
     fun buildNull(type: KotlinType) = IrConstImpl.constNull(UNDEFINED_OFFSET, UNDEFINED_OFFSET, type)
     fun buildBoolean(type: KotlinType, v: Boolean) = IrConstImpl.boolean(UNDEFINED_OFFSET, UNDEFINED_OFFSET, type, v)
+    fun buildInt(type: KotlinType, v: Int) = IrConstImpl.int(UNDEFINED_OFFSET, UNDEFINED_OFFSET, type, v)
     fun buildString(type: KotlinType, s: String) = IrConstImpl.string(UNDEFINED_OFFSET, UNDEFINED_OFFSET, type, s)
 }

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

@@ -27,6 +27,7 @@ import org.jetbrains.kotlin.ir.symbols.IrValueSymbol
 import org.jetbrains.kotlin.ir.visitors.*
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
 
+// TODO: generate $metadata$ property and fill it with corresponding KFunction/KProperty interface
 class CallableReferenceLowering(val context: JsIrBackendContext) : FileLoweringPass {
 
     private data class CallableReferenceKey(

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/IntrinsicifyCallsLowering.kt

@@ -7,25 +7,23 @@ package org.jetbrains.kotlin.ir.backend.js.lower
 
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
-import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
+import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
 import org.jetbrains.kotlin.ir.backend.js.utils.Namer
+import org.jetbrains.kotlin.ir.backend.js.utils.OperatorNames
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
 import org.jetbrains.kotlin.ir.expressions.IrCall
-import org.jetbrains.kotlin.ir.expressions.IrConstKind
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.copyTypeArgumentsFrom
 import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
-import org.jetbrains.kotlin.ir.expressions.impl.IrConstImpl
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.SimpleType
-import org.jetbrains.kotlin.util.OperatorNameConventions
 
 class IntrinsicifyCallsLowering(private val context: JsIrBackendContext) : FileLoweringPass {
 
@@ -48,36 +46,36 @@ class IntrinsicifyCallsLowering(private val context: JsIrBackendContext) : FileL
 
         memberToIrFunction.run {
             for (type in primitiveNumbers) {
-                op(type, OperatorNameConventions.UNARY_PLUS, context.intrinsics.jsUnaryPlus)
+                op(type, OperatorNames.UNARY_PLUS, context.intrinsics.jsUnaryPlus)
-                op(type, OperatorNameConventions.UNARY_MINUS, context.intrinsics.jsUnaryMinus)
+                op(type, OperatorNames.UNARY_MINUS, context.intrinsics.jsUnaryMinus)
 
-                op(type, OperatorNameConventions.PLUS, context.intrinsics.jsPlus)
+                op(type, OperatorNames.ADD, context.intrinsics.jsPlus)
-                op(type, OperatorNameConventions.MINUS, context.intrinsics.jsMinus)
+                op(type, OperatorNames.SUB, context.intrinsics.jsMinus)
-                op(type, OperatorNameConventions.TIMES, context.intrinsics.jsMult)
+                op(type, OperatorNames.MUL, context.intrinsics.jsMult)
-                op(type, OperatorNameConventions.DIV, context.intrinsics.jsDiv)
+                op(type, OperatorNames.DIV, context.intrinsics.jsDiv)
-                op(type, OperatorNameConventions.MOD, context.intrinsics.jsMod)
+                op(type, OperatorNames.MOD, context.intrinsics.jsMod)
-                op(type, OperatorNameConventions.REM, context.intrinsics.jsMod)
+                op(type, OperatorNames.REM, context.intrinsics.jsMod)
             }
 
             context.irBuiltIns.string.let {
-                op(it, OperatorNameConventions.PLUS, context.intrinsics.jsPlus)
+                op(it, OperatorNames.ADD, context.intrinsics.jsPlus)
             }
 
             context.irBuiltIns.int.let {
-                op(it, "shl", context.intrinsics.jsBitShiftL)
+                op(it, OperatorNames.SHL, context.intrinsics.jsBitShiftL)
-                op(it, "shr", context.intrinsics.jsBitShiftR)
+                op(it, OperatorNames.SHR, context.intrinsics.jsBitShiftR)
-                op(it, "ushr", context.intrinsics.jsBitShiftRU)
+                op(it, OperatorNames.SHRU, context.intrinsics.jsBitShiftRU)
-                op(it, "and", context.intrinsics.jsBitAnd)
+                op(it, OperatorNames.AND, context.intrinsics.jsBitAnd)
-                op(it, "or", context.intrinsics.jsBitOr)
+                op(it, OperatorNames.OR, context.intrinsics.jsBitOr)
-                op(it, "xor", context.intrinsics.jsBitXor)
+                op(it, OperatorNames.XOR, context.intrinsics.jsBitXor)
-                op(it, "inv", context.intrinsics.jsBitNot)
+                op(it, OperatorNames.INV, context.intrinsics.jsBitNot)
             }
 
             context.irBuiltIns.bool.let {
-                op(it, OperatorNameConventions.AND, context.intrinsics.jsAnd)
+                op(it, OperatorNames.AND, context.intrinsics.jsAnd)
-                op(it, OperatorNameConventions.OR, context.intrinsics.jsOr)
+                op(it, OperatorNames.OR, context.intrinsics.jsOr)
-                op(it, OperatorNameConventions.NOT, context.intrinsics.jsNot)
+                op(it, OperatorNames.NOT, context.intrinsics.jsNot)
-                op(it, "xor", context.intrinsics.jsBitXor)
+                op(it, OperatorNames.XOR, context.intrinsics.jsBitXor)
             }
         }
 
@@ -99,14 +97,14 @@ class IntrinsicifyCallsLowering(private val context: JsIrBackendContext) : FileL
         memberToTransformer.run {
             for (type in primitiveNumbers) {
                 // TODO: use increment and decrement when it's possible
-                op(type, OperatorNameConventions.INC) {
+                op(type, OperatorNames.INC) {
                     irCall(it, context.intrinsics.jsPlus.symbol, dispatchReceiverAsFirstArgument = true).apply {
-                        putValueArgument(1, IrConstImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, context.irBuiltIns.int, IrConstKind.Int, 1))
+                        putValueArgument(1, JsIrBuilder.buildInt(context.irBuiltIns.int, 1))
                     }
                 }
-                op(type, OperatorNameConventions.DEC) {
+                op(type, OperatorNames.DEC) {
                     irCall(it, context.intrinsics.jsMinus.symbol, dispatchReceiverAsFirstArgument = true).apply {
-                        putValueArgument(1, IrConstImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, context.irBuiltIns.int, IrConstKind.Int, 1))
+                        putValueArgument(1, JsIrBuilder.buildInt(context.irBuiltIns.int, 1))
                     }
                 }
             }

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/TypeOperatorLowering.kt

@@ -0,0 +1,299 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.backend.js.lower
+
+import org.jetbrains.kotlin.backend.common.FileLoweringPass
+import org.jetbrains.kotlin.backend.common.descriptors.isFunctionOrKFunctionType
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
+import org.jetbrains.kotlin.ir.IrStatement
+import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
+import org.jetbrains.kotlin.ir.backend.js.ir.JsIrArithBuilder
+import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
+import org.jetbrains.kotlin.ir.backend.js.symbols.JsSymbolBuilder
+import org.jetbrains.kotlin.ir.declarations.IrDeclaration
+import org.jetbrains.kotlin.ir.declarations.IrFile
+import org.jetbrains.kotlin.ir.expressions.IrExpression
+import org.jetbrains.kotlin.ir.expressions.IrTypeOperator
+import org.jetbrains.kotlin.ir.expressions.IrTypeOperatorCall
+import org.jetbrains.kotlin.ir.expressions.impl.IrCompositeImpl
+import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
+import org.jetbrains.kotlin.types.KotlinType
+import org.jetbrains.kotlin.types.isNullable
+import org.jetbrains.kotlin.types.typeUtil.*
+
+class TypeOperatorLowering(val context: JsIrBackendContext) : FileLoweringPass {
+    private val unit = context.builtIns.unit
+    private val unitValue = JsIrBuilder.buildGetObjectValue(unit.defaultType, context.symbolTable.referenceClass(unit))
+
+    private val lit24 = JsIrBuilder.buildInt(context.builtIns.intType, 24)
+    private val lit16 = JsIrBuilder.buildInt(context.builtIns.intType, 16)
+
+    private val byteMask = JsIrBuilder.buildInt(context.builtIns.intType, 0xFF)
+    private val shortMask = JsIrBuilder.buildInt(context.builtIns.intType, 0xFFFF)
+
+    private val calculator = JsIrArithBuilder(context)
+
+    //NOTE: Should we define JS-own functions similar to current implementation?
+    private val throwCCE = context.irBuiltIns.throwCceSymbol
+    private val throwNPE = context.irBuiltIns.throwNpeSymbol
+
+    private val eqeq = context.irBuiltIns.eqeqSymbol
+
+    private val isInterfaceSymbol = getInternalFunction("isInterface")
+    private val isArraySymbol = getInternalFunction("isArray")
+    private val isCharSymbol = getInternalFunction("isChar")
+    private val isObjectSymbol = getInternalFunction("isObject")
+
+    private val instanceOfIntrinsicSymbol = context.intrinsics.jsInstanceOf.symbol
+    private val typeOfIntrinsicSymbol = context.intrinsics.jsTypeOf.symbol
+    private val toJSTypeIntrinsicSymbol = context.intrinsics.jsToJsType.symbol
+
+    private val stringMarker = JsIrBuilder.buildString(context.irBuiltIns.string, "string")
+    private val booleanMarker = JsIrBuilder.buildString(context.irBuiltIns.string, "boolean")
+    private val functionMarker = JsIrBuilder.buildString(context.irBuiltIns.string, "function")
+    private val numberMarker = JsIrBuilder.buildString(context.irBuiltIns.string, "number")
+
+    private val litTrue: IrExpression = JsIrBuilder.buildBoolean(context.irBuiltIns.bool, true)
+    private val litNull: IrExpression = JsIrBuilder.buildNull(context.builtIns.nullableNothingType)
+
+    private fun getInternalFunction(name: String) = context.symbolTable.referenceSimpleFunction(context.getInternalFunctions(name).single())
+
+    override fun lower(irFile: IrFile) {
+        // TODO: get rid of descriptors
+        irFile.transformChildren(object : IrElementTransformer<DeclarationDescriptor> {
+            override fun visitDeclaration(declaration: IrDeclaration, data: DeclarationDescriptor) =
+                super.visitDeclaration(declaration, declaration.descriptor)
+
+            override fun visitTypeOperator(expression: IrTypeOperatorCall, data: DeclarationDescriptor): IrExpression {
+                super.visitTypeOperator(expression, data)
+
+                return when (expression.operator) {
+                    IrTypeOperator.IMPLICIT_CAST -> lowerImplicitCast(expression)
+                    IrTypeOperator.IMPLICIT_COERCION_TO_UNIT -> lowerCoercionToUnit(expression)
+                    IrTypeOperator.IMPLICIT_INTEGER_COERCION -> lowerIntegerCoercion(expression, data)
+                    IrTypeOperator.IMPLICIT_NOTNULL -> lowerImplicitNotNull(expression, data)
+                    IrTypeOperator.INSTANCEOF -> lowerInstanceOf(expression, data, false)
+                    IrTypeOperator.NOT_INSTANCEOF -> lowerInstanceOf(expression, data, true)
+                    IrTypeOperator.CAST -> lowerCast(expression, data, false)
+                    IrTypeOperator.SAFE_CAST -> lowerCast(expression, data, true)
+                }
+            }
+
+            private fun lowerImplicitNotNull(expression: IrTypeOperatorCall, containingDeclaration: DeclarationDescriptor): IrExpression {
+                assert(expression.operator == IrTypeOperator.IMPLICIT_NOTNULL)
+                assert(expression.typeOperand.isNullable() xor expression.argument.type.isNullable())
+
+                val newStatements = mutableListOf<IrStatement>()
+
+                val argument = cacheValue(expression.argument, newStatements, containingDeclaration)
+                val irNullCheck = nullCheck(argument)
+
+                newStatements += JsIrBuilder.buildIfElse(expression.typeOperand, irNullCheck, JsIrBuilder.buildCall(throwNPE), argument)
+
+                return expression.run { IrCompositeImpl(startOffset, endOffset, typeOperand, null, newStatements) }
+            }
+
+            private fun lowerCast(
+                expression: IrTypeOperatorCall,
+                containingDeclaration: DeclarationDescriptor,
+                isSafe: Boolean
+            ): IrExpression {
+                assert(expression.operator == IrTypeOperator.CAST || expression.operator == IrTypeOperator.SAFE_CAST)
+                assert((expression.operator == IrTypeOperator.SAFE_CAST) == isSafe)
+
+                val toType = expression.typeOperand
+                val failResult = if (isSafe) litNull else JsIrBuilder.buildCall(throwCCE)
+
+                val newStatements = mutableListOf<IrStatement>()
+
+                val argument = cacheValue(expression.argument, newStatements, containingDeclaration)
+
+                val check = generateTypeCheck(argument, toType)
+
+                newStatements += JsIrBuilder.buildIfElse(toType, check, argument, failResult)
+
+                return expression.run { IrCompositeImpl(startOffset, endOffset, toType, null, newStatements) }
+            }
+
+            private fun lowerImplicitCast(expression: IrTypeOperatorCall) = expression.run {
+                assert(operator == IrTypeOperator.IMPLICIT_CAST)
+                IrCompositeImpl(startOffset, endOffset, typeOperand, null, listOf(argument))
+            }
+
+            // Note: native `instanceOf` is not used which is important because of null-behaviour
+            private fun advancedCheckRequired(type: KotlinType) = type.isInterface() ||
+                    KotlinBuiltIns.isArray(type) ||
+                    KotlinBuiltIns.isPrimitiveArray(type) ||
+                    isTypeOfCheckingType(type)
+
+            private fun isTypeOfCheckingType(type: KotlinType) =
+                ((type.isPrimitiveNumberType() || KotlinBuiltIns.isNumber(type)) && !type.isLong() && !type.isChar()) ||
+                        type.isBoolean() ||
+                        type.isFunctionOrKFunctionType ||
+                        KotlinBuiltIns.isString(type)
+
+            fun lowerInstanceOf(
+                expression: IrTypeOperatorCall,
+                containingDeclaration: DeclarationDescriptor,
+                inverted: Boolean
+            ): IrExpression {
+                assert(expression.operator == IrTypeOperator.INSTANCEOF || expression.operator == IrTypeOperator.NOT_INSTANCEOF)
+                assert((expression.operator == IrTypeOperator.NOT_INSTANCEOF) == inverted)
+
+                val toType = expression.typeOperand
+                val isCopyRequired = expression.argument.type.isNullable() && advancedCheckRequired(toType.makeNotNullable())
+                val newStatements = mutableListOf<IrStatement>()
+
+                val argument =
+                    if (isCopyRequired) cacheValue(expression.argument, newStatements, containingDeclaration) else expression.argument
+                val check = generateTypeCheck(argument, toType)
+                val result = if (inverted) calculator.not(check) else check
+
+                return if (isCopyRequired) {
+                    newStatements += result
+                    IrCompositeImpl(expression.startOffset, expression.endOffset, toType, null, newStatements)
+                } else result
+            }
+
+            private fun nullCheck(value: IrExpression) = JsIrBuilder.buildCall(eqeq).apply {
+                putValueArgument(0, value)
+                putValueArgument(1, litNull)
+            }
+
+            private fun cacheValue(value: IrExpression, newStatements: MutableList<IrStatement>, cd: DeclarationDescriptor): IrExpression {
+                val varSymbol = JsSymbolBuilder.buildTempVar(cd, value.type, mutable = false)
+                newStatements += JsIrBuilder.buildVar(varSymbol, value)
+                return JsIrBuilder.buildGetValue(varSymbol)
+            }
+
+            private fun generateTypeCheck(argument: IrExpression, toType: KotlinType): IrExpression {
+                val toNotNullable = toType.makeNotNullable()
+                val instanceCheck = generateTypeCheckNonNull(argument, toNotNullable)
+                val isFromNullable = argument.type.isNullable()
+                val isToNullable = toType.isNullable()
+                val isNativeCheck = !advancedCheckRequired(toNotNullable)
+
+                return when {
+                    !isFromNullable -> instanceCheck // ! -> *
+                    isToNullable -> calculator.run { oror(nullCheck(argument), instanceCheck) } // * -> ?
+                    else -> if (isNativeCheck) instanceCheck else calculator.run {
+                        andand(
+                            not(nullCheck(argument)),
+                            instanceCheck
+                        )
+                    } // ? -> !
+                }
+            }
+
+            private fun generateTypeCheckNonNull(argument: IrExpression, toType: KotlinType): IrExpression {
+                assert(!toType.isMarkedNullable)
+                return when {
+                    KotlinBuiltIns.isAny(toType) -> generateIsObjectCheck(argument)
+                    isTypeOfCheckingType(toType) -> generateTypeOfCheck(argument, toType)
+                    toType.isChar() -> generateCheckForChar(argument)
+                    KotlinBuiltIns.isArray(toType) -> generateGenericArrayCheck(argument)
+                    KotlinBuiltIns.isPrimitiveArray(toType) -> generatePrimitiveArrayTypeCheck(argument, toType)
+                    toType.isTypeParameter() -> generateTypeCheckWithTypeParameter(argument, toType)
+                    toType.isInterface() -> generateInterfaceCheck(argument, toType)
+                    else -> generateNativeInstanceOf(argument, toType)
+                }
+            }
+
+            private fun generateIsObjectCheck(argument: IrExpression) = JsIrBuilder.buildCall(isObjectSymbol).apply {
+                putValueArgument(0, argument)
+            }
+
+            private fun generateTypeCheckWithTypeParameter(argument: IrExpression, toType: KotlinType): IrExpression {
+                val typeParameterDescriptor = toType.constructor.declarationDescriptor as TypeParameterDescriptor
+                assert(!typeParameterDescriptor.isReified) { "reified parameters have to be lowered before" }
+
+                return typeParameterDescriptor.upperBounds.fold(litTrue) { r, t ->
+                    val check = generateTypeCheckNonNull(argument, t.makeNotNullable())
+                    calculator.and(r, check)
+                }
+            }
+
+            private fun generateCheckForChar(argument: IrExpression) =
+                JsIrBuilder.buildCall(isCharSymbol).apply { dispatchReceiver = argument }
+
+            private fun generateTypeOfCheck(argument: IrExpression, toType: KotlinType): IrExpression {
+                val marker = when {
+                    toType.isFunctionOrKFunctionType -> functionMarker
+                    toType.isBoolean() -> booleanMarker
+                    KotlinBuiltIns.isString(toType) -> stringMarker
+                    else -> numberMarker
+                }
+
+                val typeOf = JsIrBuilder.buildCall(typeOfIntrinsicSymbol).apply { putValueArgument(0, argument) }
+                return JsIrBuilder.buildCall(eqeq).apply {
+                    putValueArgument(0, typeOf)
+                    putValueArgument(1, marker)
+                }
+            }
+
+            private fun wrapTypeReference(toType: KotlinType) =
+                JsIrBuilder.buildCall(toJSTypeIntrinsicSymbol).apply { putTypeArgument(0, toType) }
+
+            private fun generateGenericArrayCheck(argument: IrExpression) =
+                JsIrBuilder.buildCall(isArraySymbol).apply { putValueArgument(0, argument) }
+
+            private fun generatePrimitiveArrayTypeCheck(argument: IrExpression, toType: KotlinType): IrExpression {
+                TODO("Implement Typed Array check")
+            }
+
+            private fun generateInterfaceCheck(argument: IrExpression, toType: KotlinType): IrExpression {
+                val irType = wrapTypeReference(toType)
+                return JsIrBuilder.buildCall(isInterfaceSymbol).apply {
+                    putValueArgument(0, argument)
+                    putValueArgument(1, irType)
+                }
+            }
+
+            private fun generateNativeInstanceOf(argument: IrExpression, toType: KotlinType): IrExpression {
+                val irType = wrapTypeReference(toType)
+                return JsIrBuilder.buildCall(instanceOfIntrinsicSymbol).apply {
+                    putValueArgument(0, argument)
+                    putValueArgument(1, irType)
+                }
+            }
+
+            private fun lowerCoercionToUnit(expression: IrTypeOperatorCall): IrExpression {
+                assert(expression.operator === IrTypeOperator.IMPLICIT_COERCION_TO_UNIT)
+                return expression.run { IrCompositeImpl(startOffset, endOffset, unit.defaultType, null, listOf(argument, unitValue)) }
+            }
+
+            private fun lowerIntegerCoercion(expression: IrTypeOperatorCall, containingDeclaration: DeclarationDescriptor): IrExpression {
+                assert(expression.operator === IrTypeOperator.IMPLICIT_INTEGER_COERCION)
+                assert(KotlinBuiltIns.isInt(expression.argument.type))
+
+                val isNullable = expression.argument.type.isNullable()
+                val toType = expression.typeOperand
+
+                fun maskOp(arg: IrExpression, mask: IrExpression, shift: IrExpression) = calculator.run {
+                    shr(shl(and(arg, mask), shift), shift)
+                }
+
+                val newStatements = mutableListOf<IrStatement>()
+
+                val argument =
+                    if (isNullable) cacheValue(expression.argument, newStatements, containingDeclaration) else expression.argument
+
+                val casted = when {
+                    KotlinBuiltIns.isByte(toType) -> maskOp(argument, byteMask, lit24)
+                    KotlinBuiltIns.isShort(toType) -> maskOp(argument, shortMask, lit16)
+                    KotlinBuiltIns.isLong(toType) -> TODO("Long coercion")
+                    else -> error("Unreachable execution (coercion to non-Integer type")
+                }
+
+                newStatements += if (isNullable) JsIrBuilder.buildIfElse(toType, nullCheck(argument), litNull, casted) else casted
+
+                return expression.run { IrCompositeImpl(startOffset, endOffset, toType, null, newStatements) }
+            }
+        }, irFile.packageFragmentDescriptor)
+    }
+}

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/symbols/SymbolBuilder.kt

@@ -68,9 +68,12 @@ object JsSymbolBuilder {
     )
 
     fun buildTempVar(containingSymbol: IrFunctionSymbol, type: KotlinType, name: String? = null, mutable: Boolean = false) =
+        buildTempVar(containingSymbol.descriptor, type, name, mutable)
+
+    fun buildTempVar(containingDeclaration: DeclarationDescriptor, type: KotlinType, name: String? = null, mutable: Boolean = false) =
         IrVariableSymbolImpl(
             IrTemporaryVariableDescriptorImpl(
-                containingSymbol.descriptor,
+                containingDeclaration,
                 Name.identifier(name ?: "tmp"),
                 type, mutable
             )

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrElementToJsExpressionTransformer.kt

@@ -10,7 +10,6 @@ import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.ir.backend.js.utils.JsGenerationContext
 import org.jetbrains.kotlin.ir.backend.js.utils.Namer
 import org.jetbrains.kotlin.ir.declarations.IrConstructor
-import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.symbols.IrConstructorSymbol
 import org.jetbrains.kotlin.js.backend.ast.*
@@ -70,7 +69,7 @@ class IrElementToJsExpressionTransformer : BaseIrElementToJsNodeTransformer<JsEx
         body.expression.accept(this, context)
 
     override fun visitFunctionReference(expression: IrFunctionReference, context: JsGenerationContext): JsExpression {
-        val irFunction = expression.symbol.owner as IrFunction
+        val irFunction = expression.symbol.owner
         return irFunction.accept(IrFunctionToJsTransformer(), context).apply { name = null }
     }
 
@@ -111,7 +110,7 @@ class IrElementToJsExpressionTransformer : BaseIrElementToJsNodeTransformer<JsEx
 
     override fun visitGetObjectValue(expression: IrGetObjectValue, context: JsGenerationContext) = when (expression.symbol.owner.kind) {
         ClassKind.OBJECT -> {
-            // TODO:
+            // TODO: return unit instance instead of null
             if (expression.type.isUnit()) JsNullLiteral()
             else {
                 val className = context.getNameForSymbol(expression.symbol)
@@ -175,7 +174,6 @@ class IrElementToJsExpressionTransformer : BaseIrElementToJsNodeTransformer<JsEx
         return if (symbol is IrConstructorSymbol) {
             JsNew(context.getNameForSymbol(symbol).makeRef(), arguments)
         } else {
-            // TODO sanitize name
             val symbolName = context.getNameForSymbol(symbol)
             val ref = if (jsDispatchReceiver != null) JsNameRef(symbolName, jsDispatchReceiver) else JsNameRef(symbolName)
             JsInvocation(ref, jsExtensionReceiver?.let { listOf(jsExtensionReceiver) + arguments } ?: arguments)

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrElementToJsStatementTransformer.kt

@@ -14,14 +14,6 @@ import org.jetbrains.kotlin.js.backend.ast.*
 
 class IrElementToJsStatementTransformer : BaseIrElementToJsNodeTransformer<JsStatement, JsGenerationContext> {
 
-    // TODO: is it right place for this logic? Or should it be implemented as a separate lowering?
-    override fun visitTypeOperator(expression: IrTypeOperatorCall, context: JsGenerationContext): JsStatement {
-        if (expression.operator == IrTypeOperator.IMPLICIT_COERCION_TO_UNIT) {
-            return expression.argument.accept(this, context)
-        }
-        return super.visitTypeOperator(expression, context)
-    }
-
     override fun visitBlockBody(body: IrBlockBody, context: JsGenerationContext): JsStatement {
         return JsBlock(body.statements.map { it.accept(this, context) })
     }

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrModuleToJsTransformer.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.ir.backend.js.transformers.irToJs
 
 import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
 import org.jetbrains.kotlin.ir.backend.js.utils.JsGenerationContext
+import org.jetbrains.kotlin.ir.backend.js.utils.Namer
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.js.backend.ast.*
 
@@ -15,6 +16,12 @@ class IrModuleToJsTransformer(val backendContext: JsIrBackendContext) : BaseIrEl
         val program = JsProgram()
         val rootContext = JsGenerationContext(JsRootScope(program), backendContext)
 
+        // TODO: fix it up with new name generator
+        val kotlinAny = "kotlin\$${backendContext.builtIns.any.name.asString()}"
+        val anyName = rootContext.currentScope.declareName(kotlinAny)
+
+        program.globalBlock.statements += JsVars(JsVars.JsVar(anyName, Namer.JS_OBJECT))
+
         declaration.files.forEach {
             program.globalBlock.statements.add(it.accept(IrFileToJsTransformer(), rootContext))
         }
@@ -38,7 +45,12 @@ class IrModuleToJsTransformer(val backendContext: JsIrBackendContext) : BaseIrEl
         return statements
     }
 
-    private fun addPostDeclaration(name: JsName, visited: MutableSet<JsName>, statements: MutableList<JsStatement>, classModels: Map<JsName, JsClassModel>) {
+    private fun addPostDeclaration(
+        name: JsName,
+        visited: MutableSet<JsName>,
+        statements: MutableList<JsStatement>,
+        classModels: Map<JsName, JsClassModel>
+    ) {
         if (visited.add(name)) {
             classModels[name]?.run {
                 superName?.let { addPostDeclaration(it, visited, statements, classModels) }

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/JsIntrinsicTransformers.kt

@@ -37,6 +37,8 @@ class JsIntrinsicTransformers(backendContext: JsIrBackendContext) {
             binOp(intrinsics.jsLtEq, JsBinaryOperator.LTE)
 
             prefixOp(intrinsics.jsNot, JsUnaryOperator.NOT)
+            binOp(intrinsics.jsAnd, JsBinaryOperator.AND)
+            binOp(intrinsics.jsOr, JsBinaryOperator.OR)
 
             prefixOp(intrinsics.jsUnaryPlus, JsUnaryOperator.POS)
             prefixOp(intrinsics.jsUnaryMinus, JsUnaryOperator.NEG)
@@ -63,6 +65,8 @@ class JsIntrinsicTransformers(backendContext: JsIrBackendContext) {
 
             binOp(intrinsics.jsInstanceOf, JsBinaryOperator.INSTANCEOF)
 
+            prefixOp(intrinsics.jsTypeOf, JsUnaryOperator.TYPEOF)
+
             add(intrinsics.jsObjectCreate) { call, context ->
                 val classToCreate = call.getTypeArgument(0)!!
                 val className = context.getNameForSymbol(IrClassSymbolImpl(classToCreate.constructor.declarationDescriptor as ClassDescriptor))
@@ -81,6 +85,12 @@ class JsIntrinsicTransformers(backendContext: JsIrBackendContext) {
                 jsAssignment(JsNameRef(fieldNameLiteral, receiver), fieldValue)
             }
 
+            add(intrinsics.jsToJsType) { call, context ->
+                val typeParameter = call.getTypeArgument(0)!!
+                val typeName = context.getNameForSymbol(IrClassSymbolImpl(typeParameter.constructor.declarationDescriptor as ClassDescriptor))
+                typeName.makeRef()
+            }
+
             add(backendContext.sharedVariablesManager.closureBoxConstructorTypeSymbol) { call, context ->
                 val args = translateCallArguments(call, context)
                 val initializer = args[0]

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/jsCode.kt

@@ -6,24 +6,43 @@
 package org.jetbrains.kotlin.ir.backend.js.transformers.irToJs
 
 import com.google.gwt.dev.js.ThrowExceptionOnErrorReporter
+import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.expressions.IrCall
 import org.jetbrains.kotlin.ir.expressions.IrConst
-import org.jetbrains.kotlin.ir.expressions.IrConstKind
+import org.jetbrains.kotlin.ir.expressions.IrExpression
+import org.jetbrains.kotlin.ir.expressions.IrStringConcatenation
+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.js.backend.ast.*
 import org.jetbrains.kotlin.js.parser.parse
 
+
 fun translateJsCode(call: IrCall, scope: JsScope): JsNode {
     //TODO check non simple compile time constants (expressions)
 
-    val arg = call.getValueArgument(0) as? IrConst<*>
+    fun foldString(expression: IrExpression): String {
-    val kind = arg?.kind as? IrConstKind.String ?: error("Parameter of js function must be compile time String constant")
+        val builder = StringBuilder()
+        expression.acceptVoid(object : IrElementVisitorVoid {
+            override fun visitElement(element: IrElement) = error("Parameter of js function must be compile time String constant")
 
-    val statements = parseJsCode(kind.valueOf(arg), JsFunctionScope(scope, "<js-code>")).orEmpty()
+            override fun <T> visitConst(expression: IrConst<T>) {
+                builder.append(expression.kind.valueOf(expression))
+            }
+
+            override fun visitStringConcatenation(expression: IrStringConcatenation) = expression.acceptChildrenVoid(this)
+        })
+
+        return builder.toString()
+    }
+
+    val code = call.getValueArgument(0)!!
+    val statements = parseJsCode(code.run(::foldString), JsFunctionScope(scope, "<js-code>")).orEmpty()
     val size = statements.size
 
     return when (size) {
         0 -> JsEmpty
-        1 -> statements[0].let { if (it is JsExpressionStatement) it.expression else it }
+        1 -> statements[0].let { (it as? JsExpressionStatement)?.expression ?: it }
         else -> JsBlock(statements)
     }
 }

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/utils/OperatorNames.kt

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.backend.js.utils
+
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.util.OperatorNameConventions
+
+object OperatorNames {
+    val UNARY_PLUS = OperatorNameConventions.UNARY_PLUS
+    val UNARY_MINUS = OperatorNameConventions.UNARY_MINUS
+
+    val ADD = OperatorNameConventions.PLUS
+    val SUB = OperatorNameConventions.MINUS
+    val MUL = OperatorNameConventions.TIMES
+    val DIV = OperatorNameConventions.DIV
+    val MOD = OperatorNameConventions.MOD
+    val REM = OperatorNameConventions.REM
+
+    val AND = OperatorNameConventions.AND
+    val OR = OperatorNameConventions.OR
+    val XOR = Name.identifier("xor")
+    val INV = Name.identifier("inv")
+
+    val SHL = Name.identifier("shl")
+    val SHR = Name.identifier("shr")
+    val SHRU = Name.identifier("shru")
+
+    val NOT = OperatorNameConventions.NOT
+
+    val INC = OperatorNameConventions.INC
+    val DEC = OperatorNameConventions.DEC
+
+
+    val BINARY = setOf(ADD, SUB, MUL, DIV, MOD, REM, AND, OR, XOR, SHL, SHR, SHRU)
+    val UNARY = setOf(UNARY_PLUS, UNARY_MINUS, INV, NOT, INC, DEC)
+    val ALL = BINARY + UNARY
+}

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/generators/DataClassMembersGenerator.kt

@@ -142,7 +142,7 @@ class DataClassMembersGenerator(declarationGenerator: DeclarationGenerator) : De
             buildMember(function, declaration) {
                 +irIfThenReturnTrue(irEqeqeq(irThis(), irOther()))
                 +irIfThenReturnFalse(irNotIs(irOther(), classDescriptor.defaultType, irClass.symbol))
-                val otherWithCast = irTemporary(irAs(irOther(), classDescriptor.defaultType, irClass.symbol), "other_with_cast")
+                val otherWithCast = irTemporary(irImplicitCast(irOther(), classDescriptor.defaultType, irClass.symbol), "other_with_cast")
                 for (property in properties) {
                     val arg1 = irGet(irThis(), getPropertyGetterSymbol(property))
                     val arg2 = irGet(irGet(otherWithCast.symbol), getPropertyGetterSymbol(property))

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/descriptors/IrBuiltIns.kt

@@ -99,18 +99,21 @@ class IrBuiltIns(val builtIns: KotlinBuiltIns) {
     val eqeqeqFun = defineOperator("EQEQEQ", bool, listOf(anyN, anyN))
     val eqeqFun = defineOperator("EQEQ", bool, listOf(anyN, anyN))
     val throwNpeFun = defineOperator("THROW_NPE", nothing, listOf())
+    val throwCceFun = defineOperator("THROW_CCE", nothing, listOf())
     val booleanNotFun = defineOperator("NOT", bool, listOf(bool))
     val noWhenBranchMatchedExceptionFun = defineOperator("noWhenBranchMatchedException", unit, listOf())
 
     val eqeqeq = eqeqeqFun.descriptor
     val eqeq = eqeqFun.descriptor
     val throwNpe = throwNpeFun.descriptor
+    val throwCce = throwCceFun.descriptor
     val booleanNot = booleanNotFun.descriptor
     val noWhenBranchMatchedException = noWhenBranchMatchedExceptionFun.descriptor
 
     val eqeqeqSymbol = eqeqeqFun.symbol
     val eqeqSymbol = eqeqFun.symbol
     val throwNpeSymbol = throwNpeFun.symbol
+    val throwCceSymbol = throwCceFun.symbol
     val booleanNotSymbol = booleanNotFun.symbol
     val noWhenBranchMatchedExceptionSymbol = noWhenBranchMatchedExceptionFun.symbol
 

core/descriptors/src/org/jetbrains/kotlin/builtins/KotlinBuiltIns.java

@@ -944,6 +944,10 @@ public abstract class KotlinBuiltIns {
         return classFqNameEquals(classDescriptor, FQ_NAMES._boolean);
     }
 
+    public static boolean isNumber(@NotNull KotlinType type) {
+        return isConstructedFromGivenClassAndNotNullable(type, FQ_NAMES.number);
+    }
+
     public static boolean isChar(@NotNull KotlinType type) {
         return isConstructedFromGivenClassAndNotNullable(type, FQ_NAMES._char);
     }

js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt

@@ -45,7 +45,9 @@ abstract class BasicIrBoxTest(
     ) {
         val runtime = listOf(
             "libraries/stdlib/js/src/kotlin/core.kt",
-            "libraries/stdlib/js/irRuntime/dummy.kt"
+            "libraries/stdlib/js/irRuntime/annotations.kt",
+            "libraries/stdlib/js/irRuntime/internalAnnotations.kt",
+            "libraries/stdlib/js/irRuntime/typeCheckUtils.kt"
         ).map { createPsiFile(it) }
 
         val filesToIgnore = listOf(

libraries/stdlib/js/irRuntime/annotations.kt

@@ -0,0 +1,8 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin
+
+interface Annotation

libraries/stdlib/js/irRuntime/internalAnnotations.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.internal
+
+@Target(AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY)
+@Retention(AnnotationRetention.BINARY)
+internal annotation class DynamicExtension

libraries/stdlib/js/irRuntime/typeCheckUtils.kt

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.js
+
+@kotlin.internal.DynamicExtension
+public fun <T> dynamic.unsafeCast(): T = this
+
+private fun isInterfaceImpl(ctor: dynamic, iface: dynamic): Boolean {
+    if (ctor === iface) return true;
+
+    val self = ::isInterfaceImpl
+    return js(
+        """
+    var metadata = ctor.${'$'}metadata${'$'};
+    if (metadata != null) {
+        var interfaces = metadata.interfaces;
+        for (var i = 0; i < interfaces.length; i++) {
+            if (self_0(interfaces[i], iface)) {
+                return true;
+            }
+        }
+    }
+
+    var superPrototype = ctor.prototype != null ? Object.getPrototypeOf(ctor.prototype) : null;
+    var superConstructor = superPrototype != null ? superPrototype.constructor : null;
+    return superConstructor != null && self_0(superConstructor, iface);
+    """
+    ).unsafeCast<Boolean>()
+}
+
+public fun isInterface(obj: dynamic, iface: dynamic): Boolean {
+    //TODO: val ctor = obj.constructor
+    val ctor = js("obj.constructor")
+
+    if (ctor == null) return false
+
+    return isInterfaceImpl(ctor, iface)
+}
+
+/*
+
+internal interface ClassMetadata {
+    val simpleName: String
+    val interfaces: Array<dynamic>
+}
+
+// TODO: replace `isInterface` with the following
+public fun isInterface(ctor: dynamic, IType: dynamic): Boolean {
+    if (ctor === IType) return true
+
+    val metadata = ctor.`$metadata$`.unsafeCast<ClassMetadata?>()
+
+    if (metadata !== null) {
+        val interfaces = metadata.interfaces
+        for (i in interfaces) {
+            if (isInterface(i, IType)) {
+                return true
+            }
+        }
+    }
+
+    var superPrototype = ctor.prototype
+    if (superPrototype !== null) {
+        superPrototype = js("Object.getPrototypeOf(superPrototype)")
+    }
+
+    val superConstructor = if (superPrototype !== null) {
+        superPrototype.constructor
+    } else null
+
+    return superConstructor != null && isInterface(superConstructor, IType)
+}
+*/
+
+inline private fun typeOf(obj: dynamic) = js("typeof obj").unsafeCast<String>()
+
+fun isObject(obj: dynamic): Boolean {
+    val objTypeOf = typeOf(obj)
+
+    return when (objTypeOf) {
+        "string" -> true
+        "number" -> true
+        "boolean" -> true
+        "function" -> true
+        else -> js("obj instanceof Object").unsafeCast<Boolean>()
+    }
+}
+
+public fun isArray(obj: Any): Boolean {
+    return js("Array.isArray(obj)").unsafeCast<Boolean>()
+}
+
+public fun isChar(c: Any): Boolean {
+    return js("throw Error(\"isChar is not implemented\")").unsafeCast<Boolean>()
+}