genpreds.c (write_insn_constraint_len): Write function optimized for CONSTRAINT_LEN...

genpreds.c (write_insn_constraint_len): Write function optimized for CONSTRAINT_LEN implementation.

2007-04-03  Richard Guenther  <rguenther@suse.de>

	* genpreds.c (write_insn_constraint_len): Write function
	optimized for CONSTRAINT_LEN implementation.
	(write_tm_preds_h): Output insn_constraint_len inline and
	use it for CONSTRAINT_LEN.
	(write_insn_preds_c): Don't output insn_constraint_len.
	* doc/md.texi (define_register_constraint): Document multi-letter
	constraints shall have the same length if they start with the same
	letter.

From-SVN: r123451