[es6] Reintroduce the instanceof operator in the backends.

src/x64/builtins-x64.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_X64
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1244 matching lines @@
   // 3. Raise a TypeError if the receiver is not a date.
   __ bind(&receiver_not_date);
   {
     FrameScope scope(masm, StackFrame::MANUAL);
     __ EnterFrame(StackFrame::INTERNAL);
     __ CallRuntime(Runtime::kThrowNotDateError);
   }
 }
 
 // static
-void Builtins::Generate_FunctionHasInstance(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rax     : argc
-  //  -- rsp[0]  : return address
-  //  -- rsp[8]  : first argument (left-hand side)
-  //  -- rsp[16] : receiver (right-hand side)
-  // -----------------------------------
-
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    __ movp(InstanceOfDescriptor::LeftRegister(),
-            Operand(rbp, 2 * kPointerSize));  // Load left-hand side.
-    __ movp(InstanceOfDescriptor::RightRegister(),
-            Operand(rbp, 3 * kPointerSize));  // Load right-hand side.
-    InstanceOfStub stub(masm->isolate(), true);
-    __ CallStub(&stub);
-  }
-
-  // Pop the argument and the receiver.
-  __ ret(2 * kPointerSize);
-}
-
-// static
 void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax     : argc
   //  -- rsp[0]  : return address
   //  -- rsp[8]  : argArray
   //  -- rsp[16] : thisArg
   //  -- rsp[24] : receiver
   // -----------------------------------
 
   // 1. Load receiver into rdi, argArray into rax (if present), remove all
@@ skipping 1657 matching lines @@
   __ ret(0);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64