gcc/testsuite/gcc.c-torture/execute/pr65215-3.c

   1 /* PR tree-optimization/65215 */
   2
   3 struct S { unsigned long long l1 : 24, l2 : 8, l3 : 32; };
   4
   5 static inline unsigned int
   6 foo (unsigned int x)
   7 {
   8   return (x >> 24) | ((x >> 8) & 0xff00) | ((x << 8) & 0xff0000) | (x << 24);
   9 }
  10
  11 __attribute__((noinline, noclone)) unsigned long long
  12 bar (struct S *x)
  13 {
  14   unsigned long long x1 = foo (((unsigned int) x->l1 << 8) | x->l2);
  15   unsigned long long x2 = foo (x->l3);
  16   return (x2 << 32) | x1;
  17 }
  18
  19 int
  20 main ()
  21 {
  22   if (__CHAR_BIT__ != 8 || sizeof (unsigned int) != 4 || sizeof (unsigned long long) != 8)
  23     return 0;
  24   struct S s = { 0xdeadbeU, 0xefU, 0xfeedbea8U };
  25   unsigned long long l = bar (&s);
  26   if (foo (l >> 32) != s.l3
  27       || (foo (l) >> 8) != s.l1
  28       || (foo (l) & 0xff) != s.l2)
  29     __builtin_abort ();
  30   return 0;
  31 }