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Re: [lno] [RFC] if-conversion and auto vectorizer
- From: Toon Moene <toon at moene dot indiv dot nluug dot nl>
- To: Richard Henderson <rth at redhat dot com>
- Cc: Robert Dewar <dewar at gnat dot com>, alexr at spies dot com, gcc at gcc dot gnu dot org
- Date: Tue, 16 Mar 2004 23:55:59 +0100
- Subject: Re: [lno] [RFC] if-conversion and auto vectorizer
- Organization: Moene Computational Physics, Maartensdijk, NL
- References: <20040316122702.393DEF2DC2@nile.gnat.com> <20040316183250.GA12315@redhat.com>
Richard Henderson wrote:
For the same reasons that we preserve a set of rules that are
beyond C89 such that it's possible to write kernels.
Ah, I already thought so [well, actually, I was thinking "embedded
systems"].
Can I have an option (to be set by default to "yes" by the various
Fortran front ends) that says:
No valid (Fortran) program can cause the generation of floating point
exceptions or memory access violations ?
Even Fortran 2003 will only allow 1.0/0.0 to cause a (legal) exception
if you first specify:
USE IEEE_EXCEPTIONS
and the (as yet hypothetical) front end implementing that Standard could
easily flip the switch on seeing that statement *for the translation unit*.
Thanks in advance,
--
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
GNU Fortran 95: http://gcc.gnu.org/fortran/ (under construction)