Makefile.in (cfgcleanup.o): Add cselib.h dependancy.

Makefile.in (cfgcleanup.o): Add cselib.h dependancy.

	* Makefile.in (cfgcleanup.o): Add cselib.h dependancy.
	* basic-block.h (CLEANUP_THREADING): New constant.
	* cfgcleanup.c: Include cselib.h
	(thread_jump, mark_effect): New functions.
	(try_forward_edges): Do jump threading when asked for.
	* jump.c (mark_modified_reg, save_regs, num_same_regs, modified_regs,
	modified_mem, thread_jumps, rtx_equal_for-thread_p): Kill.
	* rtl.h (thread_jumps, rtx_equal_for_thread_p): Kill.
	* toplev.c (rest_of_compilation): Do now call thread_jumps; use
	CLEANUP_THREAD instead.

From-SVN: r48108