tree-inline.c (copy_bb): Insert new statements to statements_to_fold set.

	* tree-inline.c (copy_bb): Insert new statements to statements_to_fold
	set.
	(fold_marked_statements): New function.
	(optimize_inline_calls, tree_function_versioning): Fold new statements.
	* tree-inline.h (copy_body_data): Add statemetns_to_fold.

From-SVN: r120430