[SH] PR 39423 - Fix ICEs, add more tests

[Kaz Kojima]

Oleg Endo <oleg.endo@t-online.de> wrote:
> This patch fixes ICEs such as reported in the PR due to wrong predicate
> matching and adds test cases for those.
> Tested on rev 190273 with
> make -k check RUNTESTFLAGS="--target_board=sh-sim
> \{-m2/-ml,-m2/-mb,-m2a/-mb,-m4/-ml,-m4/-mb,-m4a/-ml,-m4a/-mb}"
> 
> and no new failures.
> OK?

OK.

Regards,
	kaz