[Bug tree-optimization/99416] s211 benchmark of TSVC is vectorized by icc and not by gcc

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99416

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |53947
   Last reconfirmed|                            |2021-03-08
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
          Component|middle-end                  |tree-optimization
           Keywords|                            |missed-optimization
                 CC|                            |amker at gcc dot gnu.org,
                   |                            |rguenth at gcc dot gnu.org

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  ICC applies loop distribution but again our cost-modeling doesn't
want that to happen.

I suspect we want to detect extra incentives there (make dependences "good",
allow interchange, etc.)


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations