/* { dg-do compile } *//* { dg-options "-O1 -fdump-tree-vars" } */int f(int *a){  int &b = *a;  b = 0;  return *a;}/* There should be only one dereferencing of a. *//* { dg-final { scan-tree-dump-times "\\*a" 1 "vars" } } *//* { dg-final { cleanup-tree-dump "vars" } } */