loop.h (precondition_loop_p): Added new mode argument.

 	* loop.h (precondition_loop_p): Added new mode argument.
	* unroll.c (precondition_loop_p): Likewise.
	(approx_final_value): Function deleted and subsumed
 	into loop_iterations.
	(loop_find_equiv_value): New function.
	(loop_iterations): Use loop_find_equiv_value to find increments
	too large to be immediate constants.  Also use it to find terms
	common to initial and final iteration values that can be removed.

From-SVN: r23885

gcc/ChangeLog

+Thu Nov 26 18:26:21 1998  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>
+
+ 	* loop.h (precondition_loop_p): Added new mode argument.
+	* unroll.c (precondition_loop_p): Likewise.
+	(approx_final_value): Function deleted and subsumed
+ 	into loop_iterations.
+	(loop_find_equiv_value): New function.
+	(loop_iterations): Use loop_find_equiv_value to find increments
+	too large to be immediate constants.  Also use it to find terms
+	common to initial and final iteration values that can be removed.
+
+
 Thu Nov 26 18:05:04 1998  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>
 
 	* loop.h (struct loop_info): Define new structure.

gcc/loop.h

@@ -215,7 +215,8 @@ void unroll_loop PROTO((rtx, int, rtx, rtx, struct loop_info *, int));
 rtx biv_total_increment PROTO((struct iv_class *, rtx, rtx));
 unsigned HOST_WIDE_INT loop_iterations PROTO((rtx, rtx, struct loop_info *));
 int precondition_loop_p PROTO((rtx, struct loop_info *, 
-			       rtx *, rtx *, rtx *));
+			       rtx *, rtx *, rtx *, 
+			       enum machine_mode *mode));
 rtx final_biv_value PROTO((struct iv_class *, rtx, rtx,
 			   unsigned HOST_WIDE_INT));
 rtx final_giv_value PROTO((struct induction *, rtx, rtx,