memcpy() with a sizeof(void *) size just nicely uses mov

optimized libc memcpy()

160       	char *str1 = "mystring";
7ffff6240c71:   lea 0xf2(%rip),%rax        # 0x7ffff6240d6a
7ffff6240c78:   mov %rax,-0x8(%rbp)
161       	char *str2 = NULL;
7ffff6240c7c:   movq $0x0,-0x10(%rbp)
165       	memcpy(&str2, &str1, sizeof(char *));
7ffff6240c84:   mov -0x8(%rbp),%rax
7ffff6240c88:   mov %rax,-0x10(%rbp)





160       	char *str1 = "mystring";
7ffff6240c71:   lea 0xf2(%rip),%rax        # 0x7ffff6240d6a
7ffff6240c78:   mov %rax,-0x8(%rbp)
161       	char *str2 = NULL;
7ffff6240c7c:   movq $0x0,-0x10(%rbp)
164       	str2 = str1;
7ffff6240c84:   mov -0x8(%rbp),%rax
7ffff6240c88:   mov %rax,-0x10(%rbp)