gcc/testsuite/gcc.c-torture/execute/20180112-1.c

   1 /* PR rtl-optimization/83565 */
   2 /* Testcase by Sergei Trofimovich <slyfox@inbox.ru> */
   3
   4 extern void abort (void);
   5
   6 typedef __UINT32_TYPE__ u32;
   7
   8 u32 bug (u32 * result) __attribute__((noinline));
   9 u32 bug (u32 * result)
  10 {
  11   volatile u32 ss = 0xFFFFffff;
  12   volatile u32 d  = 0xEEEEeeee;
  13   u32 tt = d & 0x00800000;
  14   u32 r  = tt << 8;
  15
  16   r = (r >> 31) | (r <<  1);
  17
  18   u32 u = r^ss;
  19   u32 off = u >> 1;
  20
  21   *result = tt;
  22   return off;
  23 }
  24
  25 int main(void)
  26 {
  27   u32 l;
  28   u32 off = bug(&l);
  29   if (off != 0x7fffffff)
  30     abort ();
  31   return 0;
  32 }