gcc/testsuite/gcc.dg/memcmp-pr95189.c

/* PR middle-end/95189 - memcmp being wrongly stripped like strcmp
   { dg-do run }
   { dg-options "-O2 -Wall" } */

char a4[] = "\0abc";
char a8[] = "\0abcdefg";
char a16[] = "\0abcdefghijklmno";

int cmp4 (void)
{
  return __builtin_memcmp (a4, "\0\0\0\0", 4);
}

int cmp8 (void)
{
  return __builtin_memcmp (a8, "\0\0\0\0\0\0\0\0", 8);
}

int cmp16 (void)
{
  return __builtin_memcmp (a16, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16);
}

int main (void)
{
  if (cmp4 () < 1 || cmp8 () < 1 || cmp16 () < 1)
    __builtin_abort ();
}