* tree-flow.h (remove_empty_loops, single_dom_exit): Declare.
	* passes.c (init_optimization_passes): Add pass_empty_loop.
	* tree-pass.h (pass_empty_loop): Declare.
	* tree-ssa-loop-ivcanon.c (empty_loop_p, remove_empty_loop,
	try_remove_empty_loop, remove_empty_loops): New functions.
	* tree-ssa-loop-ivopts.c (single_dom_exit): Export.
	* tree-ssa-loop.c (tree_ssa_empty_loop, pass_empty_loop): New.

	* gcc.dg/tree-ssa/loop-10.c: New test.

From-SVN: r101901