Scheduler cleanups, 4/N

Scheduler cleanups, 4/N

[Bernd Schmidt]

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We have a mechanism to prevent the scheduler from touching certain
blocks; this is used by modulo scheduling. sched-ebb does not honor this
flag currently; this patch fixes it. Bootstrapped and tested on
i686-linux (pointlessly... but it's also used in our local tree for a
new target, TI C6X).


Bernd

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	* sched-ebb.c (schedule_ebbs): Honor the BB_DISABLE_SCHEDULE_FLAG.

Index: gcc/sched-ebb.c
===================================================================
--- gcc/sched-ebb.c.orig
+++ gcc/sched-ebb.c
@@ -585,6 +585,9 @@ schedule_ebbs (void)
     {
       rtx head = BB_HEAD (bb);
 
+      if (bb->flags & BB_DISABLE_SCHEDULE)
+	continue;
+
       for (;;)
 	{
 	  edge e;
@@ -597,6 +600,8 @@ schedule_ebbs (void)
 	    break;
 	  if (e->probability <= probability_cutoff)
 	    break;
+	  if (e->dest->flags & BB_DISABLE_SCHEDULE)
+ 	    break;
 	  bb = bb->next_bb;
 	}
 

Re: Scheduler cleanups, 4/N

[Jeff Law]

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On 03/24/11 07:14, Bernd Schmidt wrote:
> We have a mechanism to prevent the scheduler from touching certain
> blocks; this is used by modulo scheduling. sched-ebb does not honor this
> flag currently; this patch fixes it. Bootstrapped and tested on
> i686-linux (pointlessly... but it's also used in our local tree for a
> new target, TI C6X).
OK.
Jeff
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