gcc/
	* gensupport.c (sequence_num): Replace with...
	(insn_sequence_num, split_sequence_num, peephole2_sequence_num):
	...these new variables.
	(init_rtx_reader_args_cb): Update accordingly.
	(get_num_code_insns): Likewise.
	(read_md_rtx): Rework to use a while loop and get_c_test.
	Use the new counters.  Remove redundant DEFINE_SUBST case.
	* genoutput.c (gen_split): Delete.
	(main): Don't call it.

From-SVN: r226635