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Re: Optimization: Conclusions from Evolutionary Analysis

From: Erik Trulsson <ertr1013 at student dot uu dot se>
To: Scott Robert Ladd <coyote at coyotegulch dot com>
Cc: Dan Nicolaescu <dann at ics dot uci dot edu>, gcc at gcc dot gnu dot org
Date: Tue, 18 Nov 2003 18:38:29 +0100
Subject: Re: Optimization: Conclusions from Evolutionary Analysis
References: <3FBA36BB.90705@coyotegulch.com> <200311181659.hAIGxo9p010727@gremlin.ics.uci.edu> <3FBA5760.6040604@coyotegulch.com>

On Tue, Nov 18, 2003 at 12:31:12PM -0500, Scott Robert Ladd wrote:
> Dan Nicolaescu wrote:
> >You state on your web page that -O1 implies -fomit-frame-pointer. 
> >The default GCC configuration on a P4 does not do that!
> >Did you change this when compiling GCC?
> 
> Hmmm... now, is this something P4 specific? In other words, does -O1 
> imply -fomit-frame-pointer on any platform?

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.


-- 
<Insert your favourite quote here.>
Erik Trulsson
ertr1013@student.uu.se

Follow-Ups:
- Re: Optimization: Conclusions from Evolutionary Analysis
  - From: Scott Robert Ladd

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

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