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gcc compiler -O flags

Date: Fri, 25 May 2007 21:44:57 +0400
From: osv at javad.com (Sergei Organov)
Subject: gcc compiler -O flags

Ralf Corsepius <ralf.corsepius at rtems.org> writes:

> On Fri, 2007-05-25 at 11:26 -0400, Kate Feng wrote:
>> For this particular  case that Till mentioned,  the result is inversed
>> between -O,  and -O2 (-O4,  too). 
> Does this affect any code in RTEMS or is this an accademical example?

I doubt it affects any code in RTEMS, as even Chain implementation, that
does use overlapping nodes, doesn't store anything but NULL into the
overlapping part.

> In any case, did any of you report this to gcc@?

Me didn't.

-- Sergei.

Follow-Ups:
- gcc compiler -O flags
  - From: strauman at slac.stanford.edu (Till Straumann)

References:
- gcc compiler bug (sparc, ppc)
  - From: strauman at slac.stanford.edu (Till Straumann)
- gcc compiler bug (sparc, ppc)
  - From: osv at javad.com (Sergei Organov)
- aliasing again (was Re: gcc compiler bug (sparc, ppc))
  - From: strauman at slac.stanford.edu (Till Straumann)
- aliasing again
  - From: osv at javad.com (Sergei Organov)
- aliasing again
  - From: feng1 at bnl.gov (Kate Feng)
- aliasing again
  - From: sjohnson at sakuraindustries.com (Steven Johnson)
- aliasing again
  - From: osv at javad.com (Sergei Organov)
- gcc compiler bug (was Re: aliasing again)
  - From: feng1 at bnl.gov (Kate Feng)
- gcc compiler -O flags (was Re: gcc compiler bug)
  - From: feng1 at bnl.gov (Kate Feng)
- gcc compiler -O flags (was Re: gcc compiler bug)
  - From: ralf.corsepius at rtems.org (Ralf Corsepius)

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