On Wed, Feb 15, 2017 at 12:46:44PM +0100, Richard Biener wrote:
> >> Possibly, but for GCC 8.
> >
> > To both this switchconv patch and the potential improvement for loading
> > from const arrays (can create an enhancement PR for that), or just the
> > latter?
>
> Both I think - the patch is pretty big.
Ok, I'll queue the patch for GCC8 then.
> Maybe we can instead make early
> threading not mess this up?
Maybe, but not planning to do that myself, my knowledge about jump threading
is too limited.
> >> can we teach EVRP about this? It runs before switch conversion.
> >
> > I guess so. It is a matter of calling simplify_switch_using_ranges
> > and then doing some cleanup (you wrote that optimization)
> > - to_update_switch_stmts handling.
>
> Sounds like a good thing to do (for GCC 8 as well).
Ok, will file enhancement PRs.
Jakub
