GNU bug report logs - #18767
24.4; incorrect byte-compile on arithmatic comparisons

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Package: emacs;

Reported by: Shigeru Fukaya <shigeru.fukaya <at> gmail.com>

Date: Sat, 18 Oct 2014 20:00:02 UTC

Severity: normal

Found in version 24.4

Done: Stefan Monnier <monnier <at> iro.umontreal.ca>

Bug is archived. No further changes may be made.

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Shigeru Fukaya <shigeru.fukaya <at> gmail.com>
Cc: 18767 <at> debbugs.gnu.org
Subject: bug#18767: 24.4; incorrect byte-compile on arithmatic comparisons
Date: Mon, 20 Oct 2014 17:42:56 -0400

Version:24.5

> byte-compile of arithmatic comparison operators on more than two
> arguments is incorrect.

Indeed, I was not very awake when I committed that code.  I just
reverted the change so the byte-compiler simply doesn't optimize this case.
To do any better, I think we'll have to do something like:

loop over all args, doing "byte-compile-form" + "dup", and then apply
the comparisons backward, combining them with "and".


        Stefan
This bug report was last modified 10 years and 292 days ago.

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