Revert of [compiler] Properly guard the speculative optimizations for instanceof.

src/full-codegen/ia32/full-codegen-ia32.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.
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/full-codegen/full-codegen.h"
 #include "src/ast/compile-time-value.h"
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
@@ skipping 3318 matching lines @@
       EmitHasProperty();
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ cmp(eax, isolate()->factory()->true_value());
       Split(equal, if_true, if_false, fall_through);
       break;
 
     case Token::INSTANCEOF: {
       VisitForAccumulatorValue(expr->right());
       SetExpressionPosition(expr);
       PopOperand(edx);
-      __ EmitLoadTypeFeedbackVector(ebx);
-      __ mov(edi, Immediate(SlotToIndex(expr->CompareOperationFeedbackSlot())));
-      InstanceOfWithFeedbackStub stub(isolate());
+      InstanceOfStub stub(isolate());
       __ CallStub(&stub);
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ cmp(eax, isolate()->factory()->true_value());
       Split(equal, if_true, if_false, fall_through);
       break;
     }
 
     default: {
       VisitForAccumulatorValue(expr->right());
       SetExpressionPosition(expr);
@@ skipping 235 matching lines @@
       isolate->builtins()->OnStackReplacement()->entry(),
       Assembler::target_address_at(call_target_address, unoptimized_code));
   return ON_STACK_REPLACEMENT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32