basic-block.h (find_sub_basic_block): Declare.

	* basic-block.h (find_sub_basic_block): Declare.
	* flow.c (make_edges): New arguments MIN and MAX;
	(find_sub_basic_blocks): Revamp to use make_edges
	and purge_dead_edges.
	(find_basic_blocks): Update call of find_sub_basic_block.

	* recog.c (split_all_insns): Always expect CFG to be consistent;
	call find_sub_basic_blocks in case something has changed.
	* toplev.c (rest_of_compilation): Always call split_all_insns once CFG
	has been built.

	* basic-block.h (delete_noop_moves): Declare.
	* combine.c (combine_instructions): Call it.
	(recog_for_combine): Tolerate noop moves
	(distribute_notes): Force refresh when register dies at noop move.
	* flow.c (delete_noop_moves): Use BB structure; delete JUMP insns
	too.
	(life_analysis): Update delete_noop_moves call.
	(set_noop_p): Move too ...
	* rtlanal.c (noop_move_p): ... here.
	* rtl.h (noop_move_p): Declare.

	* basic-block.h (purge_all_dead_edges, purge_dead_edges): New functions.
	* toplev.c (rest_of_compilation): Conditionally call purge_all_dead_edges
	after combine.
	* gcse.c (cprop_cc0_jump, cprop_insn): New argument "basic_block".
	(cprop_jump): Likewise; call purge_dead_edges if substitution suceeded.

From-SVN: r44267

1 files changed, 1 insertions, 0 deletions

diff --git a/gcc/rtl.h b/gcc/rtl.h
index e9227b1..278e9d0 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -1387,6 +1387,7 @@ extern int reg_set_p			PARAMS ((rtx, rtx));
 extern rtx single_set_2			PARAMS ((rtx, rtx));
 extern int multiple_sets		PARAMS ((rtx));
 extern int set_noop_p			PARAMS ((rtx));
+extern int noop_move_p			PARAMS ((rtx));
 extern rtx find_last_value		PARAMS ((rtx, rtx *, rtx, int));
 extern int refers_to_regno_p		PARAMS ((unsigned int, unsigned int,
 						 rtx, rtx *));