dart2js cps: Rewrite more List operations into JS array operations.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart

 // Copyright (c) 2013, 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 dart2js.ir_nodes;
 
 import '../constants/values.dart' as values show ConstantValue;
 import '../dart_types.dart' show DartType, InterfaceType, TypeVariableType;
 import '../elements/elements.dart';
 import '../io/source_information.dart' show SourceInformation;
 import '../types/types.dart' show TypeMask;
@@ skipping 501 matching lines @@
                        List<Primitive> arguments,
                        this.sourceInformation)
       : this.arguments = _referenceList(arguments);
 
   accept(Visitor visitor) => visitor.visitApplyBuiltinOperator(this);
 
   bool get isSafeForElimination => true;
   bool get isSafeForReordering => true;
 }
 
+/// Apply a built-in method.
+///
+/// It must be known that the arguments have the proper types.
+class ApplyBuiltinMethod extends Primitive {
+  BuiltinMethod method;
+  Reference<Primitive> receiver;
+  List<Reference<Primitive>> arguments;
+  final SourceInformation sourceInformation;
+
+  bool receiverIsNotNull = false;
+
+  ApplyBuiltinMethod(this.method,
+                     Primitive receiver,
+                     List<Primitive> arguments,
+                     this.sourceInformation)
+      : this.receiver = new Reference<Primitive>(receiver),
+        this.arguments = _referenceList(arguments);
+
+  accept(Visitor visitor) => visitor.visitApplyBuiltinMethod(this);
+
+  bool get isSafeForElimination => false;
+  bool get isSafeForReordering => false;
+}
+
 /// Throw a value.
 ///
 /// Throw is an expression, i.e., it always occurs in tail position with
 /// respect to a body or expression.
 class Throw extends TailExpression {
   Reference<Primitive> value;
 
   Throw(Primitive value) : value = new Reference<Primitive>(value);
 
   accept(Visitor visitor) => visitor.visitThrow(this);
@@ skipping 617 matching lines @@
   T visitInterceptor(Interceptor node);
   T visitCreateInstance(CreateInstance node);
   T visitGetField(GetField node);
   T visitCreateBox(CreateBox node);
   T visitReifyRuntimeType(ReifyRuntimeType node);
   T visitReadTypeVariable(ReadTypeVariable node);
   T visitTypeExpression(TypeExpression node);
   T visitCreateInvocationMirror(CreateInvocationMirror node);
   T visitTypeTest(TypeTest node);
   T visitApplyBuiltinOperator(ApplyBuiltinOperator node);
+  T visitApplyBuiltinMethod(ApplyBuiltinMethod node);
   T visitGetLength(GetLength node);
   T visitGetIndex(GetIndex node);
   T visitSetIndex(SetIndex node);
 
   // Conditions.
   T visitIsTrue(IsTrue node);
 
   // Support for literal foreign code.
   T visitForeignCode(ForeignCode node);
 }
@@ skipping 250 matching lines @@
     processCreateInvocationMirror(node);
     node.arguments.forEach(processReference);
   }
 
   processApplyBuiltinOperator(ApplyBuiltinOperator node) {}
   visitApplyBuiltinOperator(ApplyBuiltinOperator node) {
     processApplyBuiltinOperator(node);
     node.arguments.forEach(processReference);
   }
 
+  processApplyBuiltinMethod(ApplyBuiltinMethod node) {}
+  visitApplyBuiltinMethod(ApplyBuiltinMethod node) {
+    processApplyBuiltinMethod(node);
+    processReference(node.receiver);
+    node.arguments.forEach(processReference);
+  }
+
   processForeignCode(ForeignCode node) {}
   visitForeignCode(ForeignCode node) {
     processForeignCode(node);
     if (node.continuation != null) {
       processReference(node.continuation);
     }
     node.arguments.forEach(processReference);
   }
 
   processUnreachable(Unreachable node) {}
@@ skipping 152 matching lines @@
 /// Visit a just-deleted subterm and unlink all [Reference]s in it.
 class RemovalVisitor extends RecursiveVisitor {
   processReference(Reference reference) {
     reference.unlink();
   }
 
   static void remove(Node node) {
     (new RemovalVisitor()).visit(node);
   }
 }