Optimize AOT's switchable calls for the monomorphic case.

runtime/vm/object_reload.cc

 // Copyright (c) 2016, 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/object.h"
 
 #include "vm/hash_table.h"
 #include "vm/isolate_reload.h"
 #include "vm/log.h"
 #include "vm/resolver.h"
@@ skipping 49 matching lines @@
 void Code::ResetICDatas(Zone* zone) const {
   // Iterate over the Code's object pool and reset all ICDatas.
 #ifdef TARGET_ARCH_IA32
   // IA32 does not have an object pool, but, we can iterate over all
   // embedded objects by using the variable length data section.
   if (!is_alive()) {
     return;
   }
   const Instructions& instrs = Instructions::Handle(zone, instructions());
   ASSERT(!instrs.IsNull());
-  uword base_address = instrs.EntryPoint();
+  uword base_address = instrs.PayloadStart();
   Object& object = Object::Handle(zone);
   intptr_t offsets_length = pointer_offsets_length();
   const int32_t* offsets = raw_ptr()->data();
   for (intptr_t i = 0; i < offsets_length; i++) {
     int32_t offset = offsets[i];
     RawObject** object_ptr =
         reinterpret_cast<RawObject**>(base_address + offset);
     RawObject* raw_object = *object_ptr;
     if (!raw_object->IsHeapObject()) {
       continue;
@@ skipping 672 matching lines @@
       const Array& data_array =
           Array::Handle(zone, CachedEmptyICDataArray(num_args));
       set_ic_data_array(data_array);
     }
   }
 }
 
 #endif  // !PRODUCT
 
 }   // namespace dart.