https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65153
Oleg Endo <olegendo at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kkojima at gcc dot gnu.org --- Comment #4 from Oleg Endo <olegendo at gcc dot gnu.org> --- (insn 143 142 144 12 (set (reg/v:SI 7 r7 [orig:227 t ] [227]) (ior:SI (reg:SI 1 r1) (reg:SI 13 r13 [orig:718 D.4992 ] [718]))) cast-256.c:387 130 {*iorsi3_compact} (expr_list:REG_DEAD (reg:SI 13 r13 [orig:718 D.4992 ] [718]) (nil))) This is an impossible register allocation for the insn. It allows only 2 different regs but there are 3 different regs assigned. I've seen this somewhere before ... but I can't recall where. Kaz do you remember anything like that?