* tree-cfg.c (tree_execute_on_growing_pred): New.
	(tree_cfg_hooks): Add tree_execute_on_growing_pred.
	* tree-flow.h: Add a prototype for
	reserve_phi_args_for_new_edge.
	* tree-phinodes.c (reserve_phi_args_for_new_edge): New.
	(add_phi_arg): Don't resize a PHI array.

From-SVN: r91075