gcc/testsuite/gcc.dg/pr83364.c

   1 /* PR rtl-optimization/83364 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O -fno-forward-propagate -fno-tree-coalesce-vars -fno-tree-ter" } */
   4
   5 int a;
   6
   7 static int __attribute__ ((noinline, noclone))
   8 foo (unsigned char c)
   9 {
  10   c <<= (long long) c != a;
  11   c = c << 7 | c >> 1;
  12   return c;
  13 }
  14
  15 int
  16 main ()
  17 {
  18   asm volatile ("" : : : "memory");
  19   if (foo (0) != 0)
  20     __builtin_abort ();
  21   return 0;
  22 }