https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124041
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (gdb) p debug_rtxc(x) No symbol "debug_rtxc" in current context. (gdb) p debug_rtx(x) (subreg:SI (reg/f:DI 64 sfp) 0) $2 = void (gdb) p debug_rtx(new_rtx) (reg/f:DI 31 sp) $3 = void yes there is no SImode allowed for sp on aarch64 so this should return null (except inside a debug insn). `-O2 -fstack-protector -ftrivial-auto-var-init=zero -fsanitize=thread`.
