[Bug middle-end/125894] RFE: Fill unreachable function alignment padding with poison

[xry111 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125894

--- Comment #4 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
BTW this can also apply for -falign-jumps (for branch targets only reachable
via a jump).