gcc/testsuite/gcc.dg/volatile2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4 struct GTeth_desc
   5 {
   6   unsigned ed_cmdsts;
   7 };
   8 struct GTeth_softc
   9 {
  10   struct GTeth_desc txq_desc[32];
  11 };
  12
  13 void foo(struct GTeth_softc *sc)
  14 {
  15   /* Verify that we retain the volatileness on the
  16      store until after optimization.  */
  17   volatile struct GTeth_desc *p = &sc->txq_desc[0];
  18   p->ed_cmdsts = 0;
  19 }
  20
  21 /* { dg-final { scan-tree-dump "{v}" "optimized" } } */
  22 /* { dg-final { cleanup-tree-dump "optimized" } } */