gcc/testsuite/gcc.c-torture/execute/20020619-1.c

   1 void abort (void);
   2 #if (__SIZEOF_INT__ == 4)
   3 typedef int int32;
   4 #elif (__SIZEOF_LONG__ == 4)
   5 typedef long int32;
   6 #else
   7 #error Add target support for int32
   8 #endif
   9 static int32 ref(void)
  10 {
  11   union {
  12     char c[5];
  13     int32 i;
  14   } u;
  15
  16   __builtin_memset (&u, 0, sizeof(u));
  17   u.c[0] = 1;
  18   u.c[1] = 2;
  19   u.c[2] = 3;
  20   u.c[3] = 4;
  21
  22   return u.i;
  23 }
  24
  25 int main()
  26 {
  27   int32 b = ref();
  28   if (b != 0x01020304
  29       && b != 0x04030201)
  30     abort ();
  31   return 0;
  32 }