Encapsulate megamorphic load/tail-call in hydrogen

src/ic/ic.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/base/bits.h"
@@ skipping 797 matching lines @@
 
 
 Handle<Code> LoadIC::initialize_stub(Isolate* isolate,
                                      ExtraICState extra_state) {
   return PropertyICCompiler::ComputeLoad(isolate, UNINITIALIZED, extra_state);
 }
 
 
 Handle<Code> LoadIC::megamorphic_stub() {
   if (kind() == Code::LOAD_IC) {
-    return PropertyICCompiler::ComputeLoad(isolate(), MEGAMORPHIC,
-                                           extra_ic_state());
+    MegamorphicLoadStub stub(isolate(), State(extra_ic_state()));
+    return stub.GetCode();
   } else {
     DCHECK_EQ(Code::KEYED_LOAD_IC, kind());
     return KeyedLoadIC::generic_stub(isolate());
   }
 }
 
 
 Handle<Code> LoadIC::pre_monomorphic_stub(Isolate* isolate,
                                           ExtraICState extra_state) {
   return PropertyICCompiler::ComputeLoad(isolate, PREMONOMORPHIC, extra_state);
@@ skipping 2375 matching lines @@
 static const Address IC_utilities[] = {
 #define ADDR(name) FUNCTION_ADDR(name),
     IC_UTIL_LIST(ADDR) NULL
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) { return IC_utilities[id]; }
 }
 }  // namespace v8::internal