re PR tree-optimization/44182 (-fcompare-debug failure (length) with -O1)

re PR tree-optimization/44182 (-fcompare-debug failure (length) with -O1)

	PR tree-optimization/44182
	* tree-inline.c (copy_edges_for_bb): Don't split bb if a stmt that
	newly needs to end a bb is followed by debug stmts, instead return
	true from the function at the end.
	(maybe_move_debug_stmts_to_successors): New function.
	(copy_cfg_body): Call it if copy_edges_for_bb returned true.

	* g++.dg/debug/pr44182.C: New test.

From-SVN: r160074