* tree-into-ssa.c (phis_to_rewrite, blocks_with_phis_to_rewrite): New
	variables.
	(mark_phi_for_rewrite): New function.
	(insert_phi_nodes_for, mark_use_interesting): Call
	mark_phi_for_rewrite.
	(rewrite_update_phi_arguments): Traverse only phis in phis_to_rewrite.
	(update_ssa): Initialize and free phis_to_rewrite.

From-SVN: r113431