[arm][arm64] fix code for InstanceofStub

src/arm64/code-stubs-arm64.cc

 // Copyright 2013 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 1551 matching lines @@
 
   // Before null, smi and string checks, check that the rhs is a function.
   // For a non-function rhs, an exception must be thrown.
   __ JumpIfSmi(function, &slow);
   __ JumpIfNotObjectType(
       function, scratch1, object_type, JS_FUNCTION_TYPE, &slow);
 
   __ Mov(result, res_false);
 
   // Null is not instance of anything.
-  __ Cmp(object_type, Operand(isolate()->factory()->null_value()));
+  __ Cmp(object, Operand(isolate()->factory()->null_value()));
   __ B(ne, &object_not_null);
   __ Ret();
 
   __ Bind(&object_not_null);
   // Smi values are not instances of anything.
   __ JumpIfNotSmi(object, &object_not_null_or_smi);
   __ Ret();
 
   __ Bind(&object_not_null_or_smi);
   // String values are not instances of anything.
@@ skipping 3477 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64