old-autovect-branch/gcc/testsuite/gcc.dg/tree-ssa/20040729-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-dce3" } */
   3
   4 foo ()
   5 {
   6   volatile int *p;
   7   volatile int x;
   8
   9   p = &x;
  10   *p = 3;
  11   return *p + 1;
  12 }
  13
  14 /* The assignment to 'p' is dead and should be removed.  But the
  15    compiler was mistakenly thinking that the statement had volatile
  16    operands.  But 'p' itself is not volatile and taking the address of
  17    a volatile does not constitute a volatile operand.  */
  18 /* { dg-final { scan-tree-dump-times "&x" 0 "dce3"} } */
  19 /* { dg-final { cleanup-tree-dump "dce3" } } */