[Bug middle-end/54685] [SH] Improve unsigned int comparison with 0x7FFFFFFF

[olegendo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54685

--- Comment #9 from Oleg Endo <olegendo at gcc dot gnu.org> ---
This is basically the same issue as PR 59533.  emit_store_flag_1 in expmed.c
always expands the not-shift because the assumption there is that it's cheaper,
which is not true for SH.

The pre-peephole idea from http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59533#c2
also fixes this problem and makes the change in r192200 superfluous.