[Bug tree-optimization/66726] missed optimization, factor conversion out of COND_EXPR

[kugan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66726

--- Comment #5 from kugan at gcc dot gnu.org ---
(In reply to Andrew Pinski from comment #4)
> (In reply to kugan from comment #3)
> > > really you should handle more
> > > than two arguments to phis.
> > I am not sure how we can handle phi stmt with more than two arguments here.
> > Any hints please?
> 
> Yes they are all interger constants but one of them. Also I think you do
> have another bug where the conversion is an extension the original interger
> has to fit in the new type. That is if you converting from char to int.

Thanks for that. Yes, I fixed this and another during testing. I will post it
after full regression testing.