GNU bug report logs - #30020
floating point unboxing regression in 2.2.3

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From: "Thompson, David" <dthompson2 <at> worcester.edu>
To: Mark H Weaver <mhw <at> netris.org>
Cc: Andy Wingo <wingo <at> pobox.com>, 30020 <at> debbugs.gnu.org
Subject: bug#30020: floating point unboxing regression in 2.2.3
Date: Mon, 28 May 2018 15:39:56 -0400

Hi Mark,

On Mon, May 28, 2018 at 2:21 AM, Mark H Weaver <mhw <at> netris.org> wrote:
> Hi David,
>
> Sorry for the long delay.

No worries!

> I did the moral equivalent of a git bisect, and found the culprit:
>
>   commit d4883307ca64a7028b9a6cd072974437306c19d3
>   Author: Andy Wingo <wingo <at> pobox.com>
>   Date:   Thu Nov 30 10:41:45 2017 +0100
>
>   Minor CSE run-time optimization
>
>   * module/language/cps/cse.scm (compute-equivalent-subexpressions): Minor
>   optimization to reduce the size of equivalent expression keys, and to
>   avoid some work if an expression has no key.

Thanks for taking the time to look at it. Curious to know what Andy thinks.

- Dave

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