Calculate the size of all variables

[Ian Lance Taylor]

Le Ton Chanh <letonchanh@yahoo.com> writes:

> I want to calculate the size of all variables in a function. I try with the following code but it doesn't run. Please help me. Thank you very much.
>
> int size_of_vars (fndecl) //fndecl is FUNCTION_DECL
>      tree fndecl;

The comment says fndecl must be a FUNCTION_DECL (by the way, function
prototypes were standardized twenty years ago, it's OK to use them).

> {
>   tree t;
>   HOST_WIDE_INT total_size = 0;
>   tree let = DECL_INITIAL (fndecl);
>   for (t = BLOCK_VARS (let); t; t = TREE_CHAIN (t))
>     total_size += int_size_in_bytes (TREE_TYPE (t));
>
>   /* Process all subblocks.  */
>   for (t = BLOCK_SUBBLOCKS (let); t; t = TREE_CHAIN (t))
>     total_size += size_of_vars (t);

Now you're calling it with T which is not a FUNCTION_DECL.

With all respect, you can answer this sort of question faster with a
little bit of debugging than you can by sending to a mailing list.

Ian