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Re: [PATCH] Change bb-reorder.c to use succ block frequency

From: Richard Henderson <rth at redhat dot com>
To: Pat Haugen <pthaugen at us dot ibm dot com>
Cc: gcc at gcc dot gnu dot org
Date: Mon, 13 Jun 2005 12:58:54 -0700
Subject: Re: [PATCH] Change bb-reorder.c to use succ block frequency
References: <OFB50C7BED.C994B1ED-ON8625701F.0067F054-8625701F.0068F77A@us.ibm.com>

On Mon, Jun 13, 2005 at 02:06:38PM -0500, Pat Haugen wrote:
> The following patch fixes the code to match the commentary of the algorithm
> such that block frequency is used instead of edge frequency.

Why?  It seems to me that edge frequency is what's going to matter
to the cpu when considering the branch.  Particularly for cpus that
don't have horrendously sophisticated branch predictors.

r~

References:
- [PATCH] Change bb-reorder.c to use succ block frequency
  - From: Pat Haugen

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