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

src/full-codegen/mips/full-codegen-mips.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_MIPS
 
 // Note on Mips implementation:
 //
 // The result_register() for mips is the 'v0' register, which is defined
 // by the ABI to contain function return values. However, the first
@@ skipping 3428 matching lines @@
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ LoadRoot(t0, Heap::kTrueValueRootIndex);
       Split(eq, v0, Operand(t0), if_true, if_false, fall_through);
       break;
 
     case Token::INSTANCEOF: {
       VisitForAccumulatorValue(expr->right());
       SetExpressionPosition(expr);
       __ mov(a0, result_register());
       PopOperand(a1);
-      __ EmitLoadTypeFeedbackVector(a3);
-      __ li(t0, Operand(SlotToIndex(expr->CompareOperationFeedbackSlot())));
-      InstanceOfWithFeedbackStub stub(isolate());
+      InstanceOfStub stub(isolate());
       __ CallStub(&stub);
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ LoadRoot(at, Heap::kTrueValueRootIndex);
       Split(eq, v0, Operand(at), if_true, if_false, fall_through);
       break;
     }
 
     default: {
       VisitForAccumulatorValue(expr->right());
       SetExpressionPosition(expr);
@@ skipping 235 matching lines @@
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OnStackReplacement()->entry()));
   return ON_STACK_REPLACEMENT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS