Make int a double in argument type checks.

sdk/lib/_internal/compiler/implementation/js_backend/emitter.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.
 
 part of js_backend;
 
 /**
  * A function element that represents a closure call. The signature is copied
  * from the given element.
  */
@@ skipping 1236 matching lines @@
 
   void emitRuntimeTypeSupport(CodeBuffer buffer) {
     RuntimeTypes rti = backend.rti;
     TypeChecks typeChecks = rti.requiredChecks;
 
     // Add checks to the constructors of instantiated classes.
     for (ClassElement cls in typeChecks) {
       String holder = namer.isolateAccess(backend.getImplementationClass(cls));
       for (TypeCheck check in typeChecks[cls]) {
         ClassElement cls = check.cls;
-        buffer.write('$holder.${namer.operatorIs(check.cls)}$_=${_}true$N');
         buffer.write('$holder.${namer.operatorIs(cls)}$_=${_}true$N');
         Substitution substitution = check.substitution;
         if (substitution != null) {
           String body = substitution.getCode(rti, false);
           buffer.write('$holder.${namer.substitutionName(cls)}$_=${_}$body$N');
         }
       };
     }
   }
 
@@ skipping 341 matching lines @@
    * substitutions, because they may have changed.
    */
   void generateIsTestsOn(ClassElement cls,
                          void emitIsTest(Element element),
                          void emitSubstitution(Element element, {emitNull})) {
     if (checkedClasses.contains(cls)) {
       emitIsTest(cls);
       emitSubstitution(cls);
     }
 
+    if (cls == backend.jsIntClass) {

[ngeoffray, 2013/05/24 09:34:28]

I'd prefer if that was put on the interceptor class instead (JSInt implements
double), and add a comment there.

[karlklose, 2013/05/24 11:10:50]

Done.

+      emitIsTest(compiler.doubleClass);
+    }
     RuntimeTypes rti = backend.rti;
     ClassElement superclass = cls.superclass;
 
     bool haveSameTypeVariables(ClassElement a, ClassElement b) {
       if (a.isClosure()) return true;
       return a.typeVariables == b.typeVariables;
     }
 
     if (superclass != null && superclass != compiler.objectClass &&
         !haveSameTypeVariables(cls, superclass)) {
@@ skipping 1537 matching lines @@
 """;
 const String HOOKS_API_USAGE = """
 // The code supports the following hooks:
 // dartPrint(message)   - if this function is defined it is called
 //                        instead of the Dart [print] method.
 // dartMainRunner(main) - if this function is defined, the Dart [main]
 //                        method will not be invoked directly.
 //                        Instead, a closure that will invoke [main] is
 //                        passed to [dartMainRunner].
 """;