modulo-sched: fix parameters usage and their ranges

	* modulo-sched.c (sms_schedule): Use param_sms_max_ii_factor
	value instead of macro.  Adjust comment.
	(sms_schedule_by_order): Use parameter value without macro.
	* params.opt: Add ranges for modulo scheduler parameters,
	set param_sms_max_ii_factor = 2 by default.

From-SVN: r279376

gcc/ChangeLog

 2019-12-13  Roman Zhuykov  <zhroma@ispras.ru>
 
+	* modulo-sched.c (sms_schedule): Use param_sms_max_ii_factor
+	value instead of macro.  Adjust comment.
+	(sms_schedule_by_order): Use parameter value without macro.
+	* params.opt: Add ranges for modulo scheduler parameters,
+	set param_sms_max_ii_factor = 2 by default.
+
+2019-12-13  Roman Zhuykov  <zhroma@ispras.ru>
+
 	* ddg.c (create_ddg): Init max_dist array for each node.
 	(free_ddg): Free max_dist array.
 	(create_ddg_edge): Use bool field instead of aux union.

gcc/modulo-sched.c

@@ -1331,9 +1331,6 @@ setup_sched_infos (void)
    version may be entered.  Just a guess.  */
 #define PROB_SMS_ENOUGH_ITERATIONS 80
 
-/* Used to calculate the upper bound of ii.  */
-#define MAXII_FACTOR 2
-
 /* Main entry point, perform SMS scheduling on the loops of the function
    that consist of single basic blocks.  */
 static void
@@ -1597,7 +1594,7 @@ sms_schedule (void)
       rec_mii = sms_order_nodes (g, mii, node_order, &max_asap);
       mii = MAX (res_MII (g), rec_mii);
       mii = MAX (mii, 1);
-      maxii = MAX (max_asap, MAXII_FACTOR * mii);
+      maxii = MAX (max_asap, param_sms_max_ii_factor * mii);
 
       if (dump_file)
 	fprintf (dump_file, "SMS iis %d %d %d (rec_mii, mii, maxii)\n",
@@ -1636,7 +1633,7 @@ sms_schedule (void)
 	      gcc_assert (stage_count >= 1);
 	    }
 
-	  /* The default value of PARAM_SMS_MIN_SC is 2 as stage count of
+	  /* The default value of param_sms_min_sc is 2 as stage count of
 	     1 means that there is no interleaving between iterations thus
 	     we let the scheduling passes do the job in this case.  */
 	  if (stage_count < param_sms_min_sc
@@ -1828,11 +1825,6 @@ sms_schedule (void)
    The window would then start and end on the same row, but with
    different "must precede" and "must follow" requirements.  */
 
-/* A limit on the number of cycles that resource conflicts can span.  ??? Should
-   be provided by DFA, and be dependent on the type of insn scheduled.  Currently
-   set to 0 to save compile time.  */
-#define DFA_HISTORY param_sms_dfa_history
-
 /* A threshold for the number of repeated unsuccessful attempts to insert
    an empty row, before we flush the partial schedule and start over.  */
 #define MAX_SPLIT_NUM 10
@@ -2136,7 +2128,12 @@ sms_schedule_by_order (ddg_ptr g, int mii, int maxii, int *nodes_order)
   auto_sbitmap must_follow (num_nodes);
   auto_sbitmap tobe_scheduled (num_nodes);
 
-  partial_schedule_ptr ps = create_partial_schedule (ii, g, DFA_HISTORY);
+  /* Value of param_sms_dfa_history is a limit on the number of cycles that
+     resource conflicts can span.  ??? Should be provided by DFA, and be
+     dependent on the type of insn scheduled.  Set to 0 by default to save
+     compile time.  */
+  partial_schedule_ptr ps = create_partial_schedule (ii, g,
+						     param_sms_dfa_history);
 
   bitmap_ones (tobe_scheduled);
   bitmap_clear (sched_nodes);

gcc/params.opt

@@ -817,7 +817,7 @@ Common Joined UInteger Var(param_slp_max_insns_in_bb) Init(1000) Param
 Maximum number of instructions in basic block to be considered for SLP vectorization.
 
 -param=sms-dfa-history=
-Common Joined UInteger Var(param_sms_dfa_history) Param
+Common Joined UInteger Var(param_sms_dfa_history) IntegerRange(0, 16) Param
 The number of cycles the swing modulo scheduler considers when checking conflicts using DFA.
 
 -param=sms-loop-average-count-threshold=
@@ -825,11 +825,11 @@ Common Joined UInteger Var(param_sms_loop_average_count_threshold) Param
 A threshold on the average loop count considered by the swing modulo scheduler.
 
 -param=sms-max-ii-factor=
-Common Joined UInteger Var(param_sms_max_ii_factor) Init(100) Param
+Common Joined UInteger Var(param_sms_max_ii_factor) Init(2) IntegerRange(1, 16) Param
 A factor for tuning the upper bound that swing modulo scheduler uses for scheduling a loop.
 
 -param=sms-min-sc=
-Common Joined UInteger Var(param_sms_min_sc) Init(2) IntegerRange(1, 65536) Param
+Common Joined UInteger Var(param_sms_min_sc) Init(2) IntegerRange(1, 2) Param
 The minimum value of stage count that swing modulo scheduler will generate.
 
 -param=sra-max-scalarization-size-Osize=