gcc/testsuite/gcc.c-torture/execute/pr19005.c

   1 /* PR target/19005 */
   2 extern void abort (void);
   3
   4 int v, s;
   5
   6 void
   7 bar (int a, int b)
   8 {
   9   unsigned char x = v;
  10
  11   if (!s)
  12     {
  13       if (a != x || b != (unsigned char) (x + 1))
  14         abort ();
  15     }
  16   else if (a != (unsigned char) (x + 1) || b != x)
  17     abort ();
  18   s ^= 1;
  19 }
  20
  21 int
  22 foo (int x)
  23 {
  24   unsigned char a = x, b = x + 1;
  25
  26   bar (a, b);
  27   a ^= b; b ^= a; a ^= b;
  28   bar (a, b);
  29   return 0;
  30 }
  31
  32 int
  33 main (void)
  34 {
  35   for (v = -10; v < 266; v++)
  36     foo (v);
  37   return 0;
  38 }