gcc/testsuite/gcc.dg/pr108688.c

   1 /* PR tree-optimization/108688 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fno-tree-pre -fno-tree-fre -fno-tree-dominator-opts -fno-tree-loop-im -fno-code-hoisting" } */
   4
   5 union U { signed int d : 7; signed int e : 2; } u;
   6 int a, b;
   7
   8 void
   9 foo (void)
  10 {
  11   for (int i = 0; i < 64; i++)
  12     {
  13       u.d = a;
  14       u.d ^= b;
  15     }
  16 }