gcc/testsuite/gcc.target/i386/20000614-2.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2" } */
   3
   4 extern void abort (void);
   5 extern void exit (int);
   6
   7 char buf[8];
   8
   9 void bar(char *p)
  10 {
  11 }
  12
  13 int main()
  14 {
  15   union {
  16     unsigned int val;
  17     unsigned char p[4];
  18   } serial;
  19
  20   int i;
  21   serial.val = 0;
  22   bar(buf);
  23   for(i = 0; i < 8; i += 4)
  24     {
  25       serial.p [0] += buf [i + 0];
  26       serial.p [1] += buf [i + 1];
  27       serial.p [2] += buf [i + 2];
  28       serial.p [3] += buf [i + 3];
  29     }
  30   if (serial.val)
  31     abort();
  32   exit(0);
  33 }