gcc/testsuite/gcc.dg/pr101062.c

   1 /* PR middle-end/101062 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2 -fno-toplevel-reorder -frename-registers" } */
   4
   5 union U { signed b : 5; };
   6 int c;
   7 volatile union U d[7] = { { 8 } };
   8 short e = 1;
   9
  10 __attribute__((noipa)) void
  11 foo ()
  12 {
  13   d[6].b = 0;
  14   d[6].b = 0;
  15   d[6].b = 0;
  16   d[6].b = 0;
  17   d[6].b = 0;
  18   e = 0;
  19   c = 0;
  20 }
  21
  22 int
  23 main ()
  24 {
  25   foo ();
  26   if (e != 0)
  27     __builtin_abort ();
  28   return 0;
  29 }