* config/h8300/h8300.c (shift_alg_hi): Improve the 15-bit

	logical shifts on H8/300.
	(shift_alg_si): Improve several shifts on H8/300.
	(get_shift_alg): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@49708 138bc75d-0d04-0410-961f-82ee72b054a4