Revert "Remove JavaScriptBackend from ClosedWorldBase"

pkg/compiler/lib/src/ssa/interceptor_simplifier.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.
 
 import '../common_elements.dart' show CommonElements;
 import '../constants/constant_system.dart';
 import '../constants/values.dart';
 import '../elements/entities.dart';
 import '../js_backend/interceptor_data.dart';
 import '../types/types.dart';
@@ skipping 203 matching lines @@
         user.inputs.where((input) => input == used).length;
 
     Set<ClassEntity> interceptedClasses;
     HInstruction dominator = findDominator(node.usedBy);
     // If there is a call that dominates all other uses, we can use just the
     // selector of that instruction.
     if (dominator is HInvokeDynamic &&
         dominator.isCallOnInterceptor(closedWorld) &&
         node == dominator.receiver &&
         useCount(dominator, node) == 1) {
-      interceptedClasses = interceptorData.getInterceptedClassesOn(
-          dominator.selector.name, closedWorld);
+      interceptedClasses =
+          interceptorData.getInterceptedClassesOn(dominator.selector.name);
 
       // If we found that we need number, we must still go through all
       // uses to check if they require int, or double.
       if (interceptedClasses.contains(_commonElements.jsNumberClass) &&
           !(interceptedClasses.contains(_commonElements.jsDoubleClass) ||
               interceptedClasses.contains(_commonElements.jsIntClass))) {
         Set<ClassEntity> required;
         for (HInstruction user in node.usedBy) {
           if (user is! HInvoke) continue;
-          Set<ClassEntity> intercepted = interceptorData
-              .getInterceptedClassesOn(user.selector.name, closedWorld);
+          Set<ClassEntity> intercepted =
+              interceptorData.getInterceptedClassesOn(user.selector.name);
           if (intercepted.contains(_commonElements.jsIntClass)) {
             // TODO(johnniwinther): Use type argument when all uses of
             // intercepted classes expect entities instead of elements.
             required ??= new Set/*<ClassEntity>*/();
             required.add(_commonElements.jsIntClass);
           }
           if (intercepted.contains(_commonElements.jsDoubleClass)) {
             // TODO(johnniwinther): Use type argument when all uses of
             // intercepted classes expect entities instead of elements.
             required ??= new Set/*<ClassEntity>*/();
             required.add(_commonElements.jsDoubleClass);
           }
         }
         // Don't modify the result of [interceptorData.getInterceptedClassesOn].
         if (required != null) {
           interceptedClasses = interceptedClasses.union(required);
         }
       }
     } else {
       // TODO(johnniwinther): Use type argument when all uses of intercepted
       // classes expect entities instead of elements.
       interceptedClasses = new Set/*<ClassEntity>*/();
       for (HInstruction user in node.usedBy) {
         if (user is HInvokeDynamic &&
             user.isCallOnInterceptor(closedWorld) &&
             node == user.receiver &&
             useCount(user, node) == 1) {
-          interceptedClasses.addAll(interceptorData.getInterceptedClassesOn(
-              user.selector.name, closedWorld));
+          interceptedClasses.addAll(
+              interceptorData.getInterceptedClassesOn(user.selector.name));
         } else if (user is HInvokeSuper &&
             user.isCallOnInterceptor(closedWorld) &&
             node == user.receiver &&
             useCount(user, node) == 1) {
-          interceptedClasses.addAll(interceptorData.getInterceptedClassesOn(
-              user.selector.name, closedWorld));
+          interceptedClasses.addAll(
+              interceptorData.getInterceptedClassesOn(user.selector.name));
         } else {
           // Use a most general interceptor for other instructions, example,
           // is-checks and escaping interceptors.
           interceptedClasses.addAll(interceptorData.interceptedClasses);
           break;
         }
       }
     }
 
     node.interceptedClasses = interceptedClasses;
@@ skipping 60 matching lines @@
       block.addAfter(user, replacement);
       block.rewrite(user, replacement);
       block.remove(user);
       return false;
     }
 
     if (user is HIs) {
       // See if we can rewrite the is-check to use 'instanceof', i.e. rewrite
       // "getInterceptor(x).$isT" to "x instanceof T".
       if (node == user.interceptor) {
-        if (interceptorData.mayGenerateInstanceofCheck(
-            user.typeExpression, closedWorld)) {
+        if (interceptorData.mayGenerateInstanceofCheck(user.typeExpression)) {
           HInstruction instanceofCheck = new HIs.instanceOf(
               user.typeExpression, user.expression, user.instructionType);
           instanceofCheck.sourceInformation = user.sourceInformation;
           instanceofCheck.sourceElement = user.sourceElement;
           return replaceUserWith(instanceofCheck);
         }
       }
     } else if (user is HInvokeDynamic) {
       if (node == user.inputs[0]) {
         // Replace the user with a [HOneShotInterceptor].
@@ skipping 56 matching lines @@
       instruction = new HInvokeDynamicMethod(
           selector, mask, inputs, node.instructionType, true);
     }
 
     HBasicBlock block = node.block;
     block.addAfter(node, instruction);
     block.rewrite(node, instruction);
     return true;
   }
 }