[Bug target/53911] [SH] Improve displacement addressing

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53911

--- Comment #3 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Another offset assignment related paper:
ftp://gcc.gnu.org/pub/gcc/summit/2003/Optimal%20Stack%20Slot%20Assignment.pdf