regcprop.c (copyprop_hardreg_forward_1): Remove redundant INSN_P test.

regcprop.c (copyprop_hardreg_forward_1): Remove redundant INSN_P test.

	* regcprop.c (copyprop_hardreg_forward_1): Remove redundant INSN_P
	test.
	(cprop_hardreg_bb, cprop_hardreg_debug): New functions.
	(pass_cprop_hardreg::execute): Use those.  Don't repeat bb processing
	immediately after first one with df_analyze in between, but rather
	process all bbs, queueing ones that need second pass in a worklist,
	df_analyze, process queued debug insn changes and if second pass is
	needed, process bbs from worklist, df_analyze, process queued debug
	insns again.

From-SVN: r269992