gcc/testsuite/gcc.dg/pr110496.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3
   4 long contents, f_num;
   5 int decide();
   6 int f_MV0__x;
   7 void f() {
   8   unsigned char *rptr;
   9   unsigned char valbuf[6];
  10   rptr = (unsigned char *)contents;  /* { dg-warning "-Wint-to-pointer-cast" "" { target { ! ptr_eq_long } } } */
  11   if (decide())
  12     do {
  13       __builtin_memcpy(valbuf, &f_MV0__x, sizeof(int));
  14       (&valbuf[0])[4] = (&valbuf[0])[5] = 0;
  15     } while (0);
  16   else {
  17     int MV0__x = f_num;
  18     __builtin_memcpy(valbuf, &MV0__x, sizeof(int));
  19     (&valbuf[0])[4] = (&valbuf[0])[5] = 0;
  20   }
  21   rptr[1] = valbuf[4];
  22   rptr[2] = valbuf[5];
  23   rptr[4] = valbuf[1];
  24   rptr[5] = valbuf[2];
  25   __builtin_memset(valbuf, 0, 8);
  26 }