sched-rgn.c (extend_rgns): New static function.

2006-03-16  Maxim Kuvyrkov <mkuvyrkov@ispras.ru>

	* sched-rgn.c (extend_rgns): New static function.
	(find_rgns): Use it.
	(gather_region_statistics, print_region_statistics): New static
	functions.
	* params.def (PARAM_MAX_SCHED_EXTEND_REGIONS_ITERS): New parameter.
        * doc/invoke.texi (max-sched-extend-regions-iters): Document.

From-SVN: r112126

gcc/ChangeLog

 2006-03-16  Maxim Kuvyrkov <mkuvyrkov@ispras.ru>
+
+	* sched-rgn.c (extend_rgns): New static function.
+	(find_rgns): Use it.
+	(gather_region_statistics, print_region_statistics): New static
+	functions.
+	* params.def (PARAM_MAX_SCHED_EXTEND_REGIONS_ITERS): New parameter.
+        * doc/invoke.texi (max-sched-extend-regions-iters): Document.
+
+2006-03-16  Maxim Kuvyrkov <mkuvyrkov@ispras.ru>
             Andrey Belevantsev <abel@ispras.ru>
 
 	* ddg.c (build_intra_loop_deps): Adjust add_forward_dependence call.

gcc/doc/invoke.texi

@@ -6177,6 +6177,12 @@ interblock scheduling.  The default value is 100.
 The minimum probability (in percents) of reaching a source block
 for interblock speculative scheduling.  The default value is 40.
 
+@item max-sched-extend-regions-iters
+The maximum number of iterations through CFG to extend regions.
+0 - disable region extension,
+N - do at most N iterations.
+The default value is 2.
+
 @item max-last-value-rtl
 
 The maximum size measured as number of RTLs that can be recorded in an expression

gcc/params.def

@@ -499,6 +499,11 @@ DEFPARAM(PARAM_MIN_SPEC_PROB,
          "The minimum probability of reaching a source block for interblock speculative scheduling",
          40, 0, 0)
 
+DEFPARAM(PARAM_MAX_SCHED_EXTEND_REGIONS_ITERS,
+         "max-sched-extend-regions-iters",
+         "The maximum number of iterations through CFG to extend regions",
+         2, 0, 0)
+
 DEFPARAM(PARAM_MAX_LAST_VALUE_RTL,
 	 "max-last-value-rtl",
 	 "The maximum number of RTL nodes that can be recorded as combiner's last value",