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Date: Thu, 18 Aug 2011 22:59:00 -0000
From: Richard Henderson <rth@redhat.com>
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To: Richard Guenther <richard.guenther@gmail.com>
CC: Jeff Law <law@redhat.com>, gcc-patches <gcc-patches@gcc.gnu.org>
Subject: Re: RFA: Avoiding unprofitable speculation
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On 08/17/2011 12:21 AM, Richard Guenther wrote:
> The patch itself looks sensible, though I am surprised ifcvt doesn't run in
> cfglayout mode (so you have to use reg notes to find probabilities ...)

It does run in cfglayout mode.

Jeff, I believe you're supposed to get the probabilities from some combination of

 bb->frequency
 edge->probability
 EDGE_FREQUENCY(edge)


r~