[Bug target/89324] [9 Regression] ICE in extract_constrain_insn, at recog.c:2211 on aarch64

[matmal01 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89324

--- Comment #4 from Matthew Malcomson <matmal01 at gcc dot gnu.org> ---
There were similar problems in handling the stack pointer with subs/adds
instructions elsewhere in the aarch64 backend.

Patch proposed & being worked on here:
https://gcc.gnu.org/ml/gcc-patches/2019-02/msg01458.html