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Re: [PATCH] rewrite fwprop's dataflow

From: Kenneth Zadeck <zadeck at naturalbridge dot com>
To: Paolo Bonzini <paolo dot bonzini at gmail dot com>
Cc: Paolo Bonzini <bonzini at gnu dot org>, gcc-patches at gcc dot gnu dot org, zadeck at gcc dot gnu dot org, stevenb dot gcc at gmail dot com
Date: Tue, 09 Jun 2009 06:00:46 -0400
Subject: Re: [PATCH] rewrite fwprop's dataflow
References: <20090608172035.GB6164@fencepost.gnu.org> <4A2DDAC5.6010100@naturalbridge.com> <4A2E0550.2050600@gmail.com>

Paolo Bonzini wrote:

This explanation should be part of the body of the code, not something that will be lost in the mail. Given that this is effectively a new and unique problem, this is especially important.
Thanks Kenny, I'll copy and paste it with small adjustments to df-problems.c/fwprop.c.

The dataflow code is fine. I am not authorized to approve the changes to fwprop.c
I think you can, the border between DF and passes using it are murky. After all it's just replacement for RD+chains -- I could have made a "singleton UD" problem in df-problems.c and that would have qualified as dataflow, but the code would be uglier. Also, you are right now the only one besides me to understand the MD problem. :-)

Paolo

i will look at it today

References:
- [PATCH] rewrite fwprop's dataflow
  - From: Paolo Bonzini
- Re: [PATCH] rewrite fwprop's dataflow
  - From: Kenneth Zadeck
- Re: [PATCH] rewrite fwprop's dataflow
  - From: Paolo Bonzini

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