[Bug rtl-optimization/125731] Improve RISC-V sequence for conditional xor with a constant

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125731

--- Comment #6 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Sorry, I'd been out of the office much of the last couple weeks.  Yes, the
patch I installed about a month ago is the prequisite patch.    However, Shreya
Munnangi has already sent me a patch to address this problem that I just need
to review and test.