From: Philipp Stephani <p.stephani2@gmail.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>, 26597@debbugs.gnu.org
Subject: bug#26597: 25.1; Compilation error on master with --enable-check-lisp-object-type
Date: Mon, 01 May 2017 14:33:28 +0000 [thread overview]
Message-ID: <CAArVCkRuE2c05t1CxG5qW4g+v3LWdGo+9DcXGHA2rYb5Pf5GXg@mail.gmail.com> (raw)
In-Reply-To: <jwvmvawn5af.fsf-monnier+gmane.emacs.devel@gnu.org>
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Stefan Monnier <monnier@iro.umontreal.ca> schrieb am Mo., 1. Mai 2017 um
15:01 Uhr:
> > Replacing a primitive value with a struct containing such a value
> > should never degrade performance; that would be a compiler bug.
>
> FWIW, No, compilers do not guarantee that semantically-equivalent
> programs will be compiled to code with equivalent performance, so it
> wouldn't be a bug. It's only a "quality of implementation" issue.
>
Yes, I mean "bug" in a wider sense that includes QoI issues.
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prev parent reply other threads:[~2017-05-01 14:33 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-21 20:05 bug#26597: 25.1; Compilation error on master with --enable-check-lisp-object-type Philipp Stephani
2017-04-22 7:42 ` Eli Zaretskii
2017-04-22 11:57 ` Philipp Stephani
2017-04-22 13:35 ` Andreas Schwab
2017-05-01 11:26 ` Philipp Stephani
2017-04-22 13:36 ` Eli Zaretskii
2017-05-01 12:20 ` Stefan Monnier
2017-05-01 14:33 ` Philipp Stephani [this message]
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