* gcc.dg/tree-ssa/ipa-split-2.c: New testcase.
	* ipa-split.c (consider_split): PHI in entry block is OK as long as all
	edges comming from header are equivalent.
	(visit_bb): Handle PHIs correctly.
	* tree-inline.c (copy_phis_for_bb): Be able to copy
	PHI from entry edge.
	(copy_cfg_body): Produce edge from entry BB before copying
	PHIs.

From-SVN: r161433