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Re: Optimization: Conclusions from Evolutionary Analysis

From: Scott Robert Ladd <coyote at coyotegulch dot com>
To: Erik Trulsson <ertr1013 at student dot uu dot se>
Cc: Dan Nicolaescu <dann at ics dot uci dot edu>, gcc at gcc dot gnu dot org
Date: Tue, 18 Nov 2003 13:24:41 -0500
Subject: Re: Optimization: Conclusions from Evolutionary Analysis
References: <3FBA36BB.90705@coyotegulch.com> <200311181659.hAIGxo9p010727@gremlin.ics.uci.edu> <3FBA5760.6040604@coyotegulch.com> <20031118173828.GA23501@falcon.midgard.homeip.net>

Erik Trulsson wrote:

If you check the documentation for -O it says (among other things):

     -O also turns on -fomit-frame-pointer on machines where doing
     so does not interfere with debugging.

So it seems that -O1 does imply -fomit-frame-pointer on some platforms,
but not on all platforms.

Okay, I missed this; it likely had no effect on my results, given that I use -O1 as a base. This the compiler should handle this correctly (not enabling -fomit-frame-pointer on the P4). I don't explicitly enable any options implied in -O1.

For the next iteration of acovea, I'll clarify how this is handled.

--
Scott Robert Ladd
Coyote Gulch Productions (http://www.coyotegulch.com)
Software Invention for High-Performance Computing
In development: Alex, a database for common folk

References:
- Optimization: Conclusions from Evolutionary Analysis
  - From: Scott Robert Ladd
- Re: Optimization: Conclusions from Evolutionary Analysis
  - From: Dan Nicolaescu
- Re: Optimization: Conclusions from Evolutionary Analysis
  - From: Scott Robert Ladd
- Re: Optimization: Conclusions from Evolutionary Analysis
  - From: Erik Trulsson

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