gcc/testsuite/gcc.c-torture/compile/20090331-1.c

   1 struct re_pattern_buffer {
   2     unsigned char *buffer;
   3     unsigned long int allocated;
   4 };
   5 void byte_regex_compile (struct re_pattern_buffer *bufp,
   6                          unsigned char *begalt, unsigned char *b)
   7 {
   8   unsigned char *pfrom;
   9   unsigned char *pto;
  10
  11   while ((unsigned long) (b - bufp->buffer + 3) > bufp->allocated)
  12     {
  13       unsigned char *old_buffer = bufp->buffer;
  14       bufp->allocated <<= 1;
  15       if (old_buffer != bufp->buffer)
  16         {
  17           int incr = bufp->buffer - old_buffer;
  18           b += incr;
  19         }
  20     }
  21   pfrom = b;
  22   pto = b + 3;
  23   while (pfrom != begalt)
  24     *--pto = *--pfrom;
  25 }
  26