dart2js cps: Use oneshot interceptors and 'instanceof' expressions.

pkg/compiler/lib/src/tree_ir/tree_ir_nodes.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library tree_ir_nodes;
 
 import '../constants/values.dart' as values;
 import '../dart_types.dart' show DartType, InterfaceType, TypeVariableType;
 import '../elements/elements.dart';
 import '../io/source_information.dart' show SourceInformation;
@@ skipping 250 matching lines @@
 
   accept(ExpressionVisitor visitor) {
     return visitor.visitInvokeConstructor(this);
   }
 
   accept1(ExpressionVisitor1 visitor, arg) {
     return visitor.visitInvokeConstructor(this, arg);
   }
 }
 
+/// Call a method using a one-shot interceptor.
+///
+/// There is no explicit receiver, the first argument serves that purpose.
+class OneShotInterceptor extends Expression implements Invoke {
+  final Selector selector;
+  final TypeMask mask;
+  final List<Expression> arguments;
+  final SourceInformation sourceInformation;
+
+  OneShotInterceptor(this.selector,
+                     this.mask,
+                     this.arguments,
+                     this.sourceInformation);
+
+  accept(ExpressionVisitor visitor) => visitor.visitOneShotInterceptor(this);
+  accept1(ExpressionVisitor1 visitor, arg) {
+    return visitor.visitOneShotInterceptor(this, arg);
+  }
+}
+
 /**
  * A constant.
  */
 class Constant extends Expression {
   final values.ConstantValue value;
   final SourceInformation sourceInformation;
 
   Constant(this.value, {this.sourceInformation});
 
   Constant.bool(values.BoolConstantValue constantValue)
@@ skipping 705 matching lines @@
 }
 
 abstract class ExpressionVisitor<E> {
   E visitExpression(Expression node) => node.accept(this);
   E visitVariableUse(VariableUse node);
   E visitAssign(Assign node);
   E visitInvokeStatic(InvokeStatic node);
   E visitInvokeMethod(InvokeMethod node);
   E visitInvokeMethodDirectly(InvokeMethodDirectly node);
   E visitInvokeConstructor(InvokeConstructor node);
+  E visitOneShotInterceptor(OneShotInterceptor node);
   E visitConstant(Constant node);
   E visitThis(This node);
   E visitConditional(Conditional node);
   E visitLogicalOperator(LogicalOperator node);
   E visitNot(Not node);
   E visitLiteralList(LiteralList node);
   E visitLiteralMap(LiteralMap node);
   E visitTypeOperator(TypeOperator node);
   E visitGetField(GetField node);
   E visitSetField(SetField node);
@@ skipping 17 matching lines @@
 }
 
 abstract class ExpressionVisitor1<E, A> {
   E visitExpression(Expression node, A arg) => node.accept1(this, arg);
   E visitVariableUse(VariableUse node, A arg);
   E visitAssign(Assign node, A arg);
   E visitInvokeStatic(InvokeStatic node, A arg);
   E visitInvokeMethod(InvokeMethod node, A arg);
   E visitInvokeMethodDirectly(InvokeMethodDirectly node, A arg);
   E visitInvokeConstructor(InvokeConstructor node, A arg);
+  E visitOneShotInterceptor(OneShotInterceptor node, A arg);
   E visitConstant(Constant node, A arg);
   E visitThis(This node, A arg);
   E visitConditional(Conditional node, A arg);
   E visitLogicalOperator(LogicalOperator node, A arg);
   E visitNot(Not node, A arg);
   E visitLiteralList(LiteralList node, A arg);
   E visitLiteralMap(LiteralMap node, A arg);
   E visitTypeOperator(TypeOperator node, A arg);
   E visitGetField(GetField node, A arg);
   E visitSetField(SetField node, A arg);
@@ skipping 80 matching lines @@
 
   visitInvokeMethodDirectly(InvokeMethodDirectly node) {
     visitExpression(node.receiver);
     node.arguments.forEach(visitExpression);
   }
 
   visitInvokeConstructor(InvokeConstructor node) {
     node.arguments.forEach(visitExpression);
   }
 
+  visitOneShotInterceptor(OneShotInterceptor node) {
+    node.arguments.forEach(visitExpression);
+  }
+
   visitConstant(Constant node) {}
 
   visitThis(This node) {}
 
   visitConditional(Conditional node) {
     visitExpression(node.condition);
     visitExpression(node.thenExpression);
     visitExpression(node.elseExpression);
   }
 
@@ skipping 207 matching lines @@
     node.receiver = visitExpression(node.receiver);
     _replaceExpressions(node.arguments);
     return node;
   }
 
   visitInvokeConstructor(InvokeConstructor node) {
     _replaceExpressions(node.arguments);
     return node;
   }
 
+  visitOneShotInterceptor(OneShotInterceptor node) {
+    _replaceExpressions(node.arguments);
+    return node;
+  }
+
   visitConstant(Constant node) => node;
 
   visitThis(This node) => node;
 
   visitConditional(Conditional node) {
     node.condition = visitExpression(node.condition);
     node.thenExpression = visitExpression(node.thenExpression);
     node.elseExpression = visitExpression(node.elseExpression);
     return node;
   }
@@ skipping 239 matching lines @@
 
   /// Number of uses of the current fallthrough target.
   int get useCount => _stack.last.useCount;
 
   /// Indicate that a statement will fall through to the current fallthrough
   /// target.
   void use() {
     ++_stack.last.useCount;
   }
 }