[Bug middle-end/43901] [4.6 Regression] FAIL: gcc.c-torture/compile/pr42196-2.c

["irar at il dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #14 from irar at il dot ibm dot com  2010-05-05 09:02 -------

> It tries to get a _vector_ type of the same size.  In theory each
> vectorization method can choose whatever vector size suits them
> most (as for external defs they need to build up a vector of equivalent
> elements anyway).  So with AVX we can do V4DF -> V4SF vectorization,
> if the double is an external def the vectorization method could choose
> to create a vector with double size.  But the reasonable default for
> now is th force a same-sized vector type as that is what the vectorizer
> was tested for until now (well, until I get the followup patch cleaned
> up and posted again).

OK, thanks for the explanation.

> 
> So yes, if we can return false we should probably do so instead of
> asserting (maybe assert that if we are supposed to create vectorized
> stmts and thus cannot fail that we indeed have a vector type here).

I'll prepare a patch.

Thanks,
Ira

> 
> Richard.
> 


-- 

irar at il dot ibm dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |irar at il dot ibm dot com
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2010-05-02 10:44:22         |2010-05-05 09:02:26
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43901