[Bug target/57583] large switches with jump tables are horribly broken on m68k

[hp at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57583

--- Comment #6 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
(In reply to Andreas Schwab from comment #5)
> The assembler already handles jump targets that are too far away (via the
> BROKEN_DOT_WORD hack), this issue is about growing the table itself too
> large so that the overflow table is not reachable any more within 32K.

There's no confusion here.  While a less involved patch will suffice where just
the table is too big, CASE_VECTOR_SHORTEN_MODE can detect and handle both
issues. I think it will also allow for jump-tables closer to the 4K entries
than the significantly lower limit you'll find workable with a less involved
patch and relying on BROKEN_DOT_WORD.