[Bug middle-end/46555] [4.9/5/6 Regression] PHI RTL expansion leads to CSiBE regression

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46555

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I am going to try to work on this so it can be in for stage 1 of 7.