[Bug target/104723] [12 regression] Redundant usage of stack

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104723

--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
update testcase

void f256(char *a)
{
  char t[] = "012345678901234567890123456789012345678901234567";
  __builtin_memcpy(a, &t[0], sizeof(t));
}