/* { dg-options "-O2 -fdump-tree-optimized" } */static int a;int f;void bar (void)  __attribute__((noinline));void bar (void){  f = 9;}void link_error ();int foo(){  int b, c;  a = 5;  b = a;  bar ();  b = b + a;  if (b != 10)    link_error ();  return b;}/* We should have removed the link_error on the tree level as GCC can tell that   a is not touched by the calling bar at all. *//* { dg-final { scan-tree-dump-times "link_error" 0 "optimized"} } *//* { dg-final { cleanup-tree-dump "optimized" } } */