dart2js: Constant folding and specialization for remainder

pkg/compiler/lib/src/constant_system_dart.dart

 // Copyright (c) 2012, 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.constant_system.dart;
 
 import 'compiler.dart' show Compiler;
 import 'constants/constant_system.dart';
 import 'constants/values.dart';
 import 'elements/resolution_types.dart';
@@ skipping 185 matching lines @@
   const ModuloOperation();
   int foldInts(int left, int right) {
     if (right == 0) return null;
     return left % right;
   }
 
   num foldNums(num left, num right) => left % right;
   apply(left, right) => left % right;
 }
 
+class RemainderOperation extends ArithmeticNumOperation {
+  final String name = 'remainder';
+  const RemainderOperation();
+  // Not a defined constant operation.
+  num foldNums(num left, num right) => null;
+  apply(left, right) => left.remainder(right);
+}
+
 class TruncatingDivideOperation extends ArithmeticNumOperation {
   final String name = '~/';
   const TruncatingDivideOperation();
   int foldInts(int left, int right) {
     if (right == 0) return null;
     return left ~/ right;
   }
 
   num foldNums(num left, num right) {
     num ratio = left / right;
@@ skipping 183 matching lines @@
   final greaterEqual = const GreaterEqualOperation();
   final greater = const GreaterOperation();
   final identity = const IdentityOperation();
   final ifNull = const IfNullOperation();
   final lessEqual = const LessEqualOperation();
   final less = const LessOperation();
   final modulo = const ModuloOperation();
   final multiply = const MultiplyOperation();
   final negate = const NegateOperation();
   final not = const NotOperation();
+  final remainder = const RemainderOperation();
   final shiftLeft = const ShiftLeftOperation();
   final shiftRight = const ShiftRightOperation();
   final subtract = const SubtractOperation();
   final truncatingDivide = const TruncatingDivideOperation();
   final codeUnitAt = const CodeUnitAtOperation();
   final round = const UnfoldedUnaryOperation('round');
 
   const DartConstantSystem();
 
   @override
@@ skipping 43 matching lines @@
   bool isInt(ConstantValue constant) => constant.isInt;
   bool isDouble(ConstantValue constant) => constant.isDouble;
   bool isString(ConstantValue constant) => constant.isString;
   bool isBool(ConstantValue constant) => constant.isBool;
   bool isNull(ConstantValue constant) => constant.isNull;
 
   bool isSubtype(DartTypes types, DartType s, DartType t) {
     return types.isSubtype(s, t);
   }
 }