[Bug c/28073] Type-punned pointer passed as function parameter generates bad assembly sequence

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2006-06-19 16:54 -------
(In reply to comment #2)
> Changing just one line of the test program to the (AFAIK) legal C code.  By
> casting through void *, we are addressing Andrew's concerns about violating the
> C rules. 
> 
>   Foo *pFoo = *(Foo **) ((void *)&longPtr); /* // BAD! */

No you are still accessing a long as a "Foo*", the intermediate types does not
change a thing.

The cast to "void*" is designed to get rid of the warning but does not get rid
of the undefinedness of the code.

*** This bug has been marked as a duplicate of 21920 ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28073