How to get the Tree ARRAY_TYPE declaration size

[Massimo Nazaria]

Hi everyone!

I need to get the array size from a declaration like "int v[100]" (here the 
size is "100").

For example:
  if (TREE_CODE (TREE_TYPE (var))) == ARRAY_TYPE) {
    int array_size = // ...here I want to get the size
  }

How can I do?

Thank you
Max