gcc/testsuite/gcc.dg/20061109-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1" } */
   3
   4 /* This assignment might be implemented with a mem copy from the
   5    literal pool with two BLKmode operands.  This produced an ICE on S/390
   6    since simplify_subreg was called for such a BLKmode operand.  */
   7
   8 struct a
   9 {
  10   unsigned long b:24;
  11 };
  12
  13 void
  14 foo (struct a *t)
  15 {
  16   t->b = 32;
  17 }