Implement SmiToInt and DoubleToInt.

tests/language/arithmetic_test.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.
 // Dart test program to test arithmetic operations.
 
 #library('arithmetic_test');
 #import('dart:math');
 
 class ArithmeticTest {
 
@@ skipping 301 matching lines @@
     // Double.
     Expect.equals(1234567890123, (1234567890123.0).toInt());
     Expect.equals(-1234567890123, (-1234567890123.0).toInt());
     { int i = (1234567890123.0).toInt(); }
     { int i = (-1234567890123.0).toInt(); }
     // 32bit Smi border cases.
     Expect.equals(-1073741824, (-1073741824.0).toInt());
     Expect.equals(-1073741825, (-1073741825.0).toInt());
     Expect.equals(1073741823, (1073741823.0).toInt());
     Expect.equals(1073741824, (1073741824.0).toInt());
+
     { int i = (-1073741824.0).toInt(); }
     { int i = (-1073741825.0).toInt(); }
     { int i = (1073741823.0).toInt(); }
     { int i = (1073741824.0).toInt(); }
 
     // -- toDouble --.
     // Smi.
     Expect.equals(0.0, (0).toDouble());
     Expect.equals(1.0, (1).toDouble());
     Expect.equals(-1.0, (-1).toDouble());
@@ skipping 82 matching lines @@
   static testMain() {
     for (int i = 0; i < 1500; i++) {
       runOne();
     }
   }
 }
 
 main() {
   ArithmeticTest.testMain();
 }