https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110701
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- What GCC 13 did was Trying 16 -> 17: 16: {r94:HI=r92:DI#0^0x3;clobber flags:CC;} REG_DEAD r92:DI REG_UNUSED flags:CC 17: r95:SI=sign_extend(r94:HI) REG_DEAD r94:HI Failed to match this instruction: (set (reg:SI 95) (ior:SI (and:SI (subreg:SI (reg:DI 92) 0) (const_int 340 [0x154])) (const_int 3 [0x3])))