Introduce extra IC state to record additional feedback from IC-s.

src/x64/stub-cache-x64.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1309 matching lines @@
     __ cmpq(FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset), rax);
     __ j(not_equal, miss);
   } else {
     __ Cmp(rdi, Handle<JSFunction>(function));
     __ j(not_equal, miss);
   }
 }
 
 
 MaybeObject* CallStubCompiler::GenerateMissBranch() {
-  MaybeObject* maybe_obj =
-      StubCache::ComputeCallMiss(arguments().immediate(), kind_);
+  MaybeObject* maybe_obj = StubCache::ComputeCallMiss(arguments().immediate(),
+                                                      kind_,
+                                                      extra_ic_state_);

[Mads Ager (chromium), 2011/01/18 12:54:00]

Needs updating to follow ia32.

   Object* obj;
   if (!maybe_obj->ToObject(&obj)) return maybe_obj;
   __ Jump(Handle<Code>(Code::cast(obj)), RelocInfo::CODE_TARGET);
   return obj;
 }
 
 
 MaybeObject* CallStubCompiler::CompileCallField(JSObject* object,
                                                 JSObject* holder,
                                                 int index,
@@ skipping 1771 matching lines @@
   // Return the generated code.
   return GetCode();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64