GNU bug report logs - #42147
28.0.50; pure vs side-effect-free, missing optimizations?

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Package: emacs;

Reported by: Andrea Corallo <andrea_corallo <at> yahoo.it>

Date: Tue, 30 Jun 2020 22:28:02 UTC

Severity: normal

Found in version 28.0.50

Done: Mattias Engdegård <mattiase <at> acm.org>

Bug is archived. No further changes may be made.

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Message #92 received at 42147 <at> debbugs.gnu.org (full text, mbox):

From: Mattias Engdegård <mattiase <at> acm.org>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: Stefan Monnier <monnier <at> iro.umontreal.ca>,
 Andrea Corallo <andrea_corallo <at> yahoo.it>, 42147 <at> debbugs.gnu.org
Subject: Re: bug#42147: 28.0.50; pure vs side-effect-free, missing
 optimizations?
Date: Fri, 3 Jul 2020 20:47:08 +0200

3 juli 2020 kl. 20.31 skrev Paul Eggert <eggert <at> cs.ucla.edu>:

> No, GCC generates x87 code by default.

Sorry, my mistake -- I was testing various compiler options with godbolt and must have looked at LLVM instead.

> Having Emacs use --with-mfpmath=sse should improve performance a bit on x86. But
> more important, it should make floating point more reproducible. If I get the
> time I'll look into having 'configure' add it automatically.

Thank you, this would be a prerequisite for further improvements.
This bug report was last modified 4 years and 281 days ago.

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