Replace movq with movp for X64 when the operand size is kPointerSize

src/x64/code-stubs-x64.h

 // Copyright 2011 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 344 matching lines @@
       // we should save the new scratch0_.
       if (!scratch0_.is(scratch0_orig_)) masm->push(scratch0_);
       if (!rcx.is(scratch0_orig_) &&
           !rcx.is(object_orig_) &&
           !rcx.is(address_orig_)) {
         masm->push(rcx);
       }
       masm->push(scratch1_);
       if (!address_.is(address_orig_)) {
         masm->push(address_);
-        masm->movq(address_, address_orig_);
+        masm->movp(address_, address_orig_);
       }
       if (!object_.is(object_orig_)) {
         masm->push(object_);
-        masm->movq(object_, object_orig_);
+        masm->movp(object_, object_orig_);
       }
     }
 
     void Restore(MacroAssembler* masm) {
       // These will have been preserved the entire time, so we just need to move
       // them back.  Only in one case is the orig_ reg different from the plain
       // one, since only one of them can alias with rcx.
       if (!object_.is(object_orig_)) {
-        masm->movq(object_orig_, object_);
+        masm->movp(object_orig_, object_);
         masm->pop(object_);
       }
       if (!address_.is(address_orig_)) {
-        masm->movq(address_orig_, address_);
+        masm->movp(address_orig_, address_);
         masm->pop(address_);
       }
       masm->pop(scratch1_);
       if (!rcx.is(scratch0_orig_) &&
           !rcx.is(object_orig_) &&
           !rcx.is(address_orig_)) {
         masm->pop(rcx);
       }
       if (!scratch0_.is(scratch0_orig_)) masm->pop(scratch0_);
     }
@@ skipping 84 matching lines @@
   RememberedSetAction remembered_set_action_;
   SaveFPRegsMode save_fp_regs_mode_;
   Label slow_;
   RegisterAllocation regs_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODE_STUBS_X64_H_