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Re: [PR45354] sel-sched: don't make EDGE_CROSSING edges fallthrough

From: Vladimir Makarov <vmakarov at redhat dot com>
To: Alexander Monakov <amonakov at ispras dot ru>
Cc: gcc-patches at gcc dot gnu dot org
Date: Thu, 02 Dec 2010 17:18:17 -0500
Subject: Re: [PR45354] sel-sched: don't make EDGE_CROSSING edges fallthrough
References: <alpine.LNX.2.00.1011301607320.6883@monoid.intra.ispras.ru>

On 11/30/2010 08:31 AM, Alexander Monakov wrote:

Hi,

We should not delete jumps if they cross hot/cold partition boundaries.  The
patch adds the corresponding check in bb_has_removable_jump_to_p (which is
renamed from jump_leads_only_to_bb_p, making the name a bit closer to the
purpose).

Bootstrapped and regtested on ia64-linux, x86_64-linux. OK for trunk?

Yes. Thanks for the patch, Alexander.

2010-11-30 Alexander Monakov<amonakov@ispras.ru>

	PR rtl-optimization/45354
	* sel-sched-ir.c (jump_leads_only_to_bb_p): Rename to ...
	(bb_has_removable_jump_to_p): This.  Update all callers. Make static.
	Allow BBs ending with a conditional jump.  Forbid EDGE_CROSSING jumps.
	* sel-sched-ir.h (jump_leads_only_to_bb_p): Delete prototype.

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