Move selector and arguments descriptor into MegamorphicCache.

runtime/vm/precompiler.cc

 // Copyright (c) 2015, 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.
 
 #include "vm/precompiler.h"
 
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
 #include "vm/isolate.h"
 #include "vm/log.h"
@@ skipping 339 matching lines @@
       AddFunction(target);
     }
   }
 
 #if defined(TARGET_ARCH_IA32)
   FATAL("Callee scanning unimplemented for IA32");
 #endif
 
   const ObjectPool& pool = ObjectPool::Handle(Z, code.GetObjectPool());
   ICData& call_site = ICData::Handle(Z);
+  MegamorphicCache& cache = MegamorphicCache::Handle(Z);
   String& selector = String::Handle(Z);
   Field& field = Field::Handle(Z);
   Class& cls = Class::Handle(Z);
   Instance& instance = Instance::Handle(Z);
   Code& target_code = Code::Handle(Z);
   for (intptr_t i = 0; i < pool.Length(); i++) {
     if (pool.InfoAt(i) == ObjectPool::kTaggedObject) {
       entry = pool.ObjectAt(i);
       if (entry.IsICData()) {
         call_site ^= entry.raw();
         if (call_site.NumberOfChecks() == 1) {
           // Probably a static call.
           target = call_site.GetTargetAt(0);
           AddFunction(target);
           if (!target.is_static()) {
             // Super call (should not enqueue selector) or dynamic call with a
             // CHA prediction (should enqueue selector).
             selector = call_site.target_name();
             AddSelector(selector);
           }
         } else {
           // A dynamic call.
           selector = call_site.target_name();
           AddSelector(selector);
           if (selector.raw() == Symbols::Call().raw()) {
             // Potential closure call.
             AddClosureCall(call_site);
           }
         }
+      } else if (entry.IsMegamorphicCache()) {
+        // A dynamic call.
+        cache ^= entry.raw();
+        selector = cache.target_name();
+        AddSelector(selector);
       } else if (entry.IsField()) {
         // Potential need for field initializer.
         field ^= entry.raw();
         AddField(field);
       } else if (entry.IsInstance()) {
         // Const object, literal or args descriptor.
         instance ^= entry.raw();
         AddConstObject(instance);
       } else if (entry.IsFunction()) {
         // Local closure function.
@@ skipping 474 matching lines @@
         continue;  // class 'dynamic' is in the read-only VM isolate.
       }
       cls.EnsureIsFinalized(T);
     }
   }
   I->set_all_classes_finalized(true);
 }
 
 
 }  // namespace dart