https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114843
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- ((insn 262 261 263 14 (parallel [ (set (reg:DI 0 x0) (unspec:DI [ (mem/c:V2x8QI (plus:DI (reg/f:DI 31 sp) (const_int 16 [0x10])) [0 S16 A8]) ] UNSPEC_LDP_FST)) (set (reg:DI 1 x1) (unspec:DI [ (mem/c:V2x8QI (plus:DI (reg/f:DI 31 sp) (const_int 16 [0x10])) [0 S16 A8]) ] UNSPEC_LDP_SND)) ]) "../../../libgcc/unwind.inc":141:1 -1 (nil)) It is added by pro_and_epilogue for some reason ...