[Bug target/49263] SH Target: underutilized "TST #imm, R0" instruction

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49263

--- Comment #30 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #29)
> 
> So maybe it's worth splitting up into sub-issues?

It'd be better to, yes.  But at the moment I don't have a lot of time to go
through all the cases and factor out the individual cases.  Please leave this
open.  It will be useful if I (or others) get back to active SH development in
the future.