gcc/testsuite/gcc.dg/tree-ssa/pr16721.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-strict-aliasing -fdump-tree-optimized" } */
   3
   4 struct data {
   5         volatile unsigned long *addr;
   6 } *p;
   7
   8 int test()
   9 {
  10         *p->addr;
  11         return 0;
  12 }
  13
  14 /* The load from p->addr should not disappear.  */
  15 /* { dg-final { scan-tree-dump-times "\->addr" 1 "optimized"} } */
  16 /* { dg-final { cleanup-tree-dump "optimized" } } */