gcc/testsuite/gcc.dg/tree-ssa/pr93582-10.c

   1 /* PR tree-optimization/93582 */
   2 /* { dg-do compile { target int32 } } */
   3 /* { dg-options "-O2 -fdump-tree-fre1" } */
   4 /* { dg-final { scan-tree-dump "return 72876566;" "fre1" { target le } } } */
   5 /* { dg-final { scan-tree-dump "return 559957376;" "fre1" { target be } } } */
   6
   7 union U {
   8   struct S { int a : 12, b : 5, c : 10, d : 5; } s;
   9   unsigned int i;
  10 };
  11 struct A { char a[12]; union U u; };
  12 void bar (struct A *);
  13
  14 unsigned
  15 foo (void)
  16 {
  17   struct A a;
  18   bar (&a);
  19   a.u.s.a = 1590;
  20   a.u.s.c = -404;
  21 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  22 #define M 0x67e0a5f
  23 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  24 #define M 0xa5f067e0
  25 #else
  26 #define M 0
  27 #endif
  28   return a.u.i & M;
  29 }