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Re: signed is undefined and has been since 1992 (in GCC)

From: Robert Dewar <dewar at adacore dot com>
To: Joe Buck <Joe dot Buck at synopsys dot COM>
Cc: Gabriel Dos Reis <gdr at integrable-solutions dot net>, Andrew Pinski <pinskia at physics dot uc dot edu>,Olivier Galibert <galibert at pobox dot com>, 'gcc mailing list' <gcc at gcc dot gnu dot org>,'Andrew Haley' <aph at redhat dot com>, Dave Korn <dave dot korn at artimi dot com>
Date: Tue, 28 Jun 2005 17:59:02 -0400
Subject: Re: signed is undefined and has been since 1992 (in GCC)
References: <20050628180203.GG52889@dspnet.fr.eu.org> <SERRANOVkwyBnVBwYkm00000277@SERRANO.CAM.ARTIMI.COM> <20050628191006.GI52889@dspnet.fr.eu.org> <882882640c20778910272cdd8e19eff4@physics.uc.edu> <m3fyv2ffnv.fsf@uniton.integrable-solutions.net> <42C1A5AF.3090905@adacore.com> <20050628214440.GC10397@synopsys.com>

Joe Buck wrote:

I challenge you, Robert, to find us a C compiler that generates trapping
instructions for integer adds by default.  I do not believe that such a
compiler exists.


Probably there is no production compiler that does, MIPS would be the only
possibility I think in practice. Certainly there are checkout debugging
compilers that detect undefined operations.

References:
- Re: signed is undefined and has been since 1992 (in GCC)
  - From: Olivier Galibert
- RE: signed is undefined and has been since 1992 (in GCC)
  - From: Dave Korn
- Re: signed is undefined and has been since 1992 (in GCC)
  - From: Olivier Galibert
- Re: signed is undefined and has been since 1992 (in GCC)
  - From: Andrew Pinski
- Re: signed is undefined and has been since 1992 (in GCC)
  - From: Gabriel Dos Reis
- Re: signed is undefined and has been since 1992 (in GCC)
  - From: Robert Dewar
- Re: signed is undefined and has been since 1992 (in GCC)
  - From: Joe Buck

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