* genpreds.c (generate_switch_p): New function.
	(add_mode_tests): Push the new mode test down inside an AND expr
	if this allows the switch-suitable MATCH_CODE to be near the root.
	(write_match_code_switch): New function to write a MATCH_CODE as
	a switch statement.
	(write_predicate_stmts): New function to write a predicate RTX
	expression as a sequence of statements.
	(write_one_predicate_function): Use write_predicate_stmts.
	(write_tm_constrs_h): Likewise.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@115055 138bc75d-0d04-0410-961f-82ee72b054a4