https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65317
--- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #0)
> It seems that it's better to allow any constant for the *andsi_compact
> pattern and split out the constant load if it doesn't fit into K08. An and
> with constant 0x80000000 could be treated as a special case to emit the
> shorter sequence:
> shll r4
> movt r0
> rts
> rotr r0
On SH4A the following sequence is better, because imm8 constant loads are in
the MT group:
shll r4
mov #0,r0
rts
rotcr r0
