Compiler optimization and floating point operations

From	Abid <abidmuslim@gmail.com>
Newsgroups	comp.compilers
Subject	Compiler optimization and floating point operations
Date	2013-10-23 13:47 -0700
Organization	Compilers Central
Message-ID	<13-10-026@comp.compilers> (permalink)

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Hi All:

Does back end compiler optimizations affect the floating point
accuracy? Is there any research work in this area?

Thanks,

Abid

[The answer to the first question is "sometimes", and there has been a
great deal of work in this area going back to the 1960s.  I know IBM
Fortran compilers that carefully preserve bit identical results in
regular and optimized code, and I know other compilers that freely
use all of the mathematical (but not arithmetic) equivalences that
Fortran allows. -John]

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Compiler optimization and floating point operations Abid <abidmuslim@gmail.com> - 2013-10-23 13:47 -0700
  Re: Compiler optimization and floating point operations Cameron McInally <cameron.mcinally@nyu.edu> - 2013-10-23 22:55 -0400
  Re: Compiler optimization and floating point operations glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-10-24 02:56 +0000
  Re: Compiler optimization and floating point operations George Neuner <gneuner2@comcast.net> - 2013-10-24 07:41 -0400
    Re: Compiler optimization and floating point operations Jean-Marc Bourguet <jm@bourguet.org> - 2013-10-24 15:51 +0200
    Re: Compiler optimization and floating point operations "Steven G. Kargl" <sgk@troutmask.apl.washington.edu> - 2013-10-24 16:38 +0000
      Re: Compiler optimization and floating point operations christian.bau@cbau.wanadoo.co.uk - 2013-10-28 15:54 -0700
    Re: Compiler optimization and floating point operations George Neuner <gneuner2@comcast.net> - 2013-10-24 15:51 -0400
    Re: Compiler optimization and floating point operations glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-10-24 20:21 +0000
    Re: Compiler optimization and floating point operations christian.bau@cbau.wanadoo.co.uk - 2013-10-28 15:50 -0700
      Re: Compiler optimization and floating point operations Cameron McInally <cameron.mcinally@nyu.edu> - 2013-10-28 20:41 -0400

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