gcc/testsuite/gcc.dg/pr90733.c

   1 /* PR debug/90733 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-g -O2 -w" } */
   4
   5 struct S { unsigned a : 1; };
   6 union U { struct S b; _Complex unsigned c; };
   7
   8 union U
   9 foo (union U d)
  10 {
  11   union U e = d;
  12   return e;
  13 }
  14
  15 int
  16 bar (void)
  17 {
  18   union U x, y;
  19   x.c = x.b.a;
  20   y = foo (x);
  21   return x.c != y.c;
  22 }