https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109279
--- Comment #19 from Vineet Gupta <vineetg at gcc dot gnu.org> --- FWIW with today's change, splitter is now hidden from IRA, but we are still getting the extraneous mv. 2023-10-06 c1bc7513b1d7 RISC-V: const: hide mvconst splitter from IRA