* config/mn10300/mn10300.c: Include tm-constrs.h.
	(struct liw_data): New data structure describing an LIW candidate
	instruction.
	(extract_bundle): Use struct liw_data.  Allow small integer
	operands for some instructions.
	(check_liw_constraints): Use struct liw_data.  Remove swapped
	parameter.  Add comments describing the checks.  Fix bug when
	assigning the source of liw1 to the source of liw2.
	(liw_candidate): Delete.  Code moved into extract_bundle.
	(mn10300_bundle_liw): Use struct liw_data.  Check constraints
	before swapping.
	* config/mn10300/predicates.md (liw_operand): New predicate.
	Allows registers and small integer constants.
	* config/mn10300/constraints.md (O): New constraint.  Accetps
	integers in the range -8 to +7 inclusive.
	* config/mn10300/mn10300.md (movesi_internal): Add an alternative
	for moving a small integer into a register.  Give this alternative
	LIW attributes.
	(addsi3, subsi3, cmpsi, lshrsi3, ashrsi3): Likewise.
	(ashlsi3): Likewise, plus give LIW attributes to the alternatives
	using the J,K,L and M constraints,
	(liw): Remove SI mode on second operands to allow for HI and QI
	mode values.
	(cmp_liw, liw_cmp): Likewise.  Plus fix order of operands in the
	instruction.

From-SVN: r170182