[Bug middle-end/55279] New pseudo registers aren't supported in CSE

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55279

--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> I think combine was changed for the similar reason to support psedudos but I
> cannot find the patch right now.

Note combine was only fully fixed recently in GCC 12 with
r12-8030-g61bee6aed26eb3.