gcc/testsuite/gcc.c-torture/execute/bitfld-6.c

   1 /* { dg-skip-if "requires default endianness" { *-*-* } "-fsso-struct=*" "" } */
   2
   3 union U
   4 {
   5   const int a;
   6   unsigned b : 20;
   7 };
   8
   9 static union U u = { 0x12345678 };
  10
  11 /* Constant folding used to fail to account for endianness when folding a
  12    union.  */
  13
  14 int
  15 main (void)
  16 {
  17 #ifdef __BYTE_ORDER__
  18 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  19   return u.b - 0x45678;
  20 #else
  21   return u.b - 0x12345;
  22 #endif
  23 #endif
  24   return 0;
  25 }