* ipa-inline.c (cgraph_mark_inline_edge): Avoid double accounting
	of optimized out static functions.
	(cgraph_edge_badness): Add DUMP parameter and dump reasons for the
	cost computation.  Also sanity check for overflows.
	(update_caller_keys): Update cgraph_edge_badness call; properly
	update fibheap and sanity check that it is up to date.
	(add_new_edges_to_heap): Update cgraph_edge_badness.
	(cgraph_decide_inlining_of_small_function): Likewise;
	add sanity checking that badness in heap is up to date;
	improve dumping of reason; Update badness of calls to the
	offline copy of function currently inlined; dump badness
	of functions not inlined because of unit growth limits.

From-SVN: r158278