Frama-C-discuss mailing list archives

This page gathers the archives of the old Frama-C-discuss archives, that was hosted by Inria's gforge before its demise at the end of 2020. To search for mails newer than September 2020, please visit the page of the new mailing list on Renater.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Frama-c-discuss] Executing a visitor


On 02/09/2012 10:20 AM, Boris Hollas wrote:
> I see my debug message "Expression processed" 4 times when I run it on
> int foo(int k) {
> return 1/k;
> }
> How many expression does this code contain? It should have only one
> expression (1/k), but the translated code
> int foo(int k)
> {
> int __retres;
> __retres = 1 / k;
> return (__retres);
> }
> has a new lvalue, so there are 2 expressions in total.

No there are 4 expressions in this program: 1, k, 1/k and _retres. You 
can see each of them by replacing in your code the line

   print_string "Expression processed"

by "Expression %a processed" Cil.d_exp e;

Does Frama-c run
> on this code?

Yes it is. Frama-C analyzers only handle this normalized code (except if 
you use the so-called cabs-AST/visitor instead of the standard AST/visitor).

Is each expression traversed twice?

No, it isn't.

Hope this helps,