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

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

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

Jeffrey A. Law <law at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=3507

--- Comment #2 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Fixing this would likely also help the testcase in pr3507 when compiled on
RISC-V.