Fix instance type check in apply optimization....

src/ia32/codegen-ia32.cc

 // Copyright 2006-2009 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 2167 matching lines @@
     // about to call a function.
     frame_->SyncRange(0, frame_->element_count() - 1);
 
     // Check that the receiver really is a JavaScript object.
     { frame_->PushElementAt(0);
       Result receiver = frame_->Pop();
       receiver.ToRegister();
       __ test(receiver.reg(), Immediate(kSmiTagMask));
       build_args.Branch(zero);
       Result tmp = allocator_->Allocate();
+      // We allow all JSObjects including JSFunctions.  As long as
+      // JS_FUNCTION_TYPE is the last instance type and it is right
+      // after LAST_JS_OBJECT_TYPE, we do not have to check the upper
+      // bound.
+      ASSERT(LAST_TYPE == JS_FUNCTION_TYPE);
+      ASSERT(JS_FUNCTION_TYPE == LAST_JS_OBJECT_TYPE + 1);
       __ CmpObjectType(receiver.reg(), FIRST_JS_OBJECT_TYPE, tmp.reg());
       build_args.Branch(less);
-      __ cmp(tmp.reg(), LAST_JS_OBJECT_TYPE);
-      build_args.Branch(greater);
     }
 
     // Verify that we're invoking Function.prototype.apply.
     { frame_->PushElementAt(1);
       Result apply = frame_->Pop();
       apply.ToRegister();
       __ test(apply.reg(), Immediate(kSmiTagMask));
       build_args.Branch(zero);
       Result tmp = allocator_->Allocate();
       __ CmpObjectType(apply.reg(), JS_FUNCTION_TYPE, tmp.reg());
@@ skipping 5600 matching lines @@
 
   // Slow-case: Go through the JavaScript implementation.
   __ bind(&slow);
   __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal