DFG: Supported createUninitializedInstance/initInstance functions

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

@@ -355,7 +355,6 @@ internal class ModuleDFGBuilder(val context: Context, val irModule: IrModuleFrag
         val thrownValues = mutableListOf<IrExpression>()
         val catchParameters = mutableSetOf<VariableDescriptor>()
 
-        private val returnableBlocks = mutableMapOf<FunctionDescriptor, IrReturnableBlock>()
         private val suspendableExpressionStack = mutableListOf<IrSuspendableExpression>()
 
         override fun visitElement(element: IrElement) {
@@ -453,6 +452,8 @@ internal class ModuleDFGBuilder(val context: Context, val irModule: IrModuleFrag
 
     private val arrayGetSymbol = context.ir.symbols.arrayGet
     private val arraySetSymbol = context.ir.symbols.arraySet
+    private val createUninitializedInstanceSymbol = context.ir.symbols.createUninitializedInstance
+    private val initInstanceSymbol = context.ir.symbols.initInstance
     private val scheduleImplSymbol = context.ir.symbols.scheduleImpl
     private val scheduleImplProducerClassSymbol = context.ir.symbols.functions[0]
     private val scheduleImplProducerParam = scheduleImplSymbol.descriptor.valueParameters[2].also {
@@ -473,14 +474,15 @@ internal class ModuleDFGBuilder(val context: Context, val irModule: IrModuleFrag
         private val allParameters = (descriptor as? FunctionDescriptor)?.allParameters ?: emptyList()
         private val templateParameters = allParameters.withIndex().associateBy({ it.value }, { DataFlowIR.Node.Parameter(it.index) })
 
-        private val continuationParameter = if (descriptor !is IrSimpleFunction) {
+        private val continuationParameter = when {
-            null
+            descriptor !is IrSimpleFunction -> null
-        } else if (descriptor.isSuspend) {
+
-            DataFlowIR.Node.Parameter(allParameters.size)
+            descriptor.isSuspend -> DataFlowIR.Node.Parameter(allParameters.size)
-        } else if (doResumeFunctionSymbol in descriptor.overriddenSymbols) { // <this> is a CoroutineImpl inheritor.
+
+            doResumeFunctionSymbol in descriptor.overriddenSymbols ->            // <this> is a CoroutineImpl inheritor.
                 templateParameters[descriptor.dispatchReceiverParameter!!]       // It is its own continuation.
-        } else {
+
-            null
+            else -> null
         }
 
         private fun getContinuation() = continuationParameter ?: error("Function $descriptor has no continuation parameter")
@@ -592,6 +594,23 @@ internal class ModuleDFGBuilder(val context: Context, val irModule: IrModuleFrag
                                 arraySetSymbol -> DataFlowIR.Node.ArrayWrite(expressionToEdge(value.dispatchReceiver!!),
                                         expressionToEdge(value.getValueArgument(0)!!), expressionToEdge(value.getValueArgument(1)!!))
 
+                                createUninitializedInstanceSymbol ->
+                                    DataFlowIR.Node.AllocInstance(symbolTable.mapType(value.getTypeArgument(0)!!))
+
+                                initInstanceSymbol -> {
+                                    val thiz = expressionToEdge(value.getValueArgument(0)!!)
+                                    val initializer = value.getValueArgument(1) as IrCall
+                                    val arguments = listOf(thiz) + initializer.getArguments().map { expressionToEdge(it.second) }
+                                    val callee = initializer.symbol.owner as IrConstructor
+                                    DataFlowIR.Node.StaticCall(
+                                            symbolTable.mapFunction(callee),
+                                            arguments,
+                                            symbolTable.mapClass(context.ir.symbols.unit.owner),
+                                            symbolTable.mapClass(callee.constructedClass),
+                                            null
+                                    )
+                                }
+
                                 else -> {
                                     val callee = value.symbol.owner
                                     val arguments = value.getArguments()

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

@@ -516,6 +516,15 @@ internal object DFGSerializer {
         }
     }
 
+    class AllocInstance(val type: Int) {
+
+        constructor(data: ArraySlice) : this(data.readInt())
+
+        fun write(result: ArraySlice) {
+            result.writeInt(type)
+        }
+    }
+
     class FieldRead(val receiver: Edge?, val field: Field) {
 
         constructor(data: ArraySlice) : this(data.readNullable { Edge(this) }, Field(data))
@@ -578,6 +587,7 @@ internal object DFGSerializer {
         VTABLE_CALL,
         ITABLE_CALL,
         SINGLETON,
+        ALLOC_INSTANCE,
         FIELD_READ,
         FIELD_WRITE,
         ARRAY_READ,
@@ -593,6 +603,7 @@ internal object DFGSerializer {
         var vtableCall   : VtableCall?    = null
         var itableCall   : ItableCall?    = null
         var singleton    : Singleton?     = null
+        var allocInstance: AllocInstance? = null
         var fieldRead    : FieldRead?     = null
         var fieldWrite   : FieldWrite?    = null
         var arrayRead    : ArrayRead?     = null
@@ -607,6 +618,7 @@ internal object DFGSerializer {
             vtableCall    != null -> NodeType.VTABLE_CALL
             itableCall    != null -> NodeType.ITABLE_CALL
             singleton     != null -> NodeType.SINGLETON
+            allocInstance != null -> NodeType.ALLOC_INSTANCE
             fieldRead     != null -> NodeType.FIELD_READ
             fieldWrite    != null -> NodeType.FIELD_WRITE
             arrayRead     != null -> NodeType.ARRAY_READ
@@ -624,6 +636,7 @@ internal object DFGSerializer {
             vtableCall   ?.write(result)
             itableCall   ?.write(result)
             singleton    ?.write(result)
+            allocInstance?.write(result)
             fieldRead    ?.write(result)
             fieldWrite   ?.write(result)
             arrayRead    ?.write(result)
@@ -653,6 +666,9 @@ internal object DFGSerializer {
             fun singleton(type: Int, constructor: Int?) =
                     Node().also { it.singleton = Singleton(type, constructor) }
 
+            fun allocInst(type: Int) =
+                    Node().also { it.allocInstance = AllocInstance(type) }
+
             fun fieldRead(receiver: Edge?, field: Field) =
                     Node().also { it.fieldRead = FieldRead(receiver, field) }
 
@@ -679,6 +695,7 @@ internal object DFGSerializer {
                     NodeType.VTABLE_CALL    -> result.vtableCall    = VtableCall   (data)
                     NodeType.ITABLE_CALL    -> result.itableCall    = ItableCall   (data)
                     NodeType.SINGLETON      -> result.singleton     = Singleton    (data)
+                    NodeType.ALLOC_INSTANCE -> result.allocInstance = AllocInstance(data)
                     NodeType.FIELD_READ     -> result.fieldRead     = FieldRead    (data)
                     NodeType.FIELD_WRITE    -> result.fieldWrite    = FieldWrite   (data)
                     NodeType.ARRAY_READ     -> result.arrayRead     = ArrayRead    (data)
@@ -873,6 +890,9 @@ internal object DFGSerializer {
                                     is DataFlowIR.Node.Singleton ->
                                         Node.singleton(typeMap[node.type]!!, node.constructor?.let { functionSymbolMap[it]!! })
 
+                                    is DataFlowIR.Node.AllocInstance ->
+                                        Node.allocInst(typeMap[node.type]!!)
+
                                     is DataFlowIR.Node.FieldRead ->
                                         Node.fieldRead(node.receiver?.let { buildEdge(it) }, buildField(node.field))
 
@@ -1108,6 +1128,10 @@ internal object DFGSerializer {
                                 DataFlowIR.Node.Singleton(types[singleton.type], singleton.constructor?.let { functionSymbols[it] })
                             }
 
+                            NodeType.ALLOC_INSTANCE -> {
+                                DataFlowIR.Node.AllocInstance(types[it.allocInstance!!.type])
+                            }
+
                             NodeType.FIELD_READ -> {
                                 val fieldRead = it.fieldRead!!
                                 val receiver = fieldRead.receiver?.let { deserializeEdge(it) }

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

@@ -237,6 +237,7 @@ internal object DataFlowIR {
                          val receiverType: Type?, irCallSite: IrFunctionAccessExpression?)
             : Call(callee, arguments, irCallSite)
 
+        // TODO: It can be replaced with a pair(AllocInstance, constructor Call), remove.
         class NewObject(constructor: FunctionSymbol, arguments: List<Edge>, val constructedType: Type, override val irCallSite: IrCall?)
             : Call(constructor, arguments, irCallSite)
 
@@ -254,6 +255,8 @@ internal object DataFlowIR {
 
         class Singleton(val type: Type, val constructor: FunctionSymbol?) : Node()
 
+        class AllocInstance(val type: Type) : Node()
+
         class FieldRead(val receiver: Edge?, val field: Field, val ir: IrGetField?) : Node()
 
         class FieldWrite(val receiver: Edge?, val field: Field, val value: Edge) : Node()
@@ -296,6 +299,9 @@ internal object DataFlowIR {
                 is Node.Singleton ->
                     "        SINGLETON ${node.type}\n"
 
+                is Node.AllocInstance ->
+                    "        ALLOC INSTANCE ${node.type}\n"
+
                 is Node.StaticCall -> {
                     val result = StringBuilder()
                     result.appendln("        STATIC CALL ${node.callee}")

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

@@ -355,6 +355,10 @@ internal object Devirtualization {
                             node.constructor?.let { dfs(it) }
                         }
 
+                        is DataFlowIR.Node.AllocInstance -> {
+                            addInstantiatingClass(node.type)
+                        }
+
                         is DataFlowIR.Node.Const -> addInstantiatingClass(node.type)
 
                         is DataFlowIR.Node.StaticCall ->
@@ -918,6 +922,10 @@ internal object Devirtualization {
                             instanceNode
                         }
 
+                        is DataFlowIR.Node.AllocInstance -> {
+                            concreteClass(node.type.resolved())
+                        }
+
                         is DataFlowIR.Node.FieldRead ->
                             fieldNode(node.field)