Replace OS::MemCopy with OS::MemMove (just as fast but more flexible).

src/flags.cc

 // Copyright 2006-2008 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 287 matching lines @@
 
     // find the end of the flag name
     while (*arg != '\0' && *arg != '=')
       arg++;
 
     // get the value if any
     if (*arg == '=') {
       // make a copy so we can NUL-terminate flag name
       size_t n = arg - *name;
       CHECK(n < static_cast<size_t>(buffer_size));  // buffer is too small
-      memcpy(buffer, *name, n);
+      OS::MemCopy(buffer, *name, n);
       buffer[n] = '\0';
       *name = buffer;
       // get the value
       *value = arg + 1;
     }
   }
 }
 
 
 inline char NormalizeChar(char ch) {
@@ skipping 149 matching lines @@
 static char* SkipBlackSpace(char* p) {
   while (*p != '\0' && isspace(*p) == 0) p++;
   return p;
 }
 
 
 // static
 int FlagList::SetFlagsFromString(const char* str, int len) {
   // make a 0-terminated copy of str
   ScopedVector<char> copy0(len + 1);
-  memcpy(copy0.start(), str, len);
+  OS::MemCopy(copy0.start(), str, len);
   copy0[len] = '\0';
 
   // strip leading white space
   char* copy = SkipWhiteSpace(copy0.start());
 
   // count the number of 'arguments'
   int argc = 1;  // be compatible with SetFlagsFromCommandLine()
   for (char* p = copy; *p != '\0'; argc++) {
     p = SkipBlackSpace(p);
     p = SkipWhiteSpace(p);
@@ skipping 50 matching lines @@
 }
 
 
 void FlagList::EnforceFlagImplications() {
 #define FLAG_MODE_DEFINE_IMPLICATIONS
 #include "flag-definitions.h"
 #undef FLAG_MODE_DEFINE_IMPLICATIONS
 }
 
 } }  // namespace v8::internal