From: Joseph Myers <joseph@codesourcery.com>
To: Stefan Kanthak <stefan.kanthak@nexgo.de>
Cc: <gcc@gcc.gnu.org>
Subject: Re: Are some builtin functions (for example log() vs. sqrt()) more equal than others?
Date: Fri, 30 Jul 2021 16:33:56 +0000 [thread overview]
Message-ID: <alpine.DEB.2.22.394.2107301631370.581212@digraph.polyomino.org.uk> (raw)
In-Reply-To: <D728606F9F0D4BF18F22E26ADCE3E82F@H270>
None of these are valid constant expressions as defined by the standard
(constant expressions cannot involve evaluated function calls). Some
might be accepted as an extension, but I expect that since the
optimization for constant arguments is intended for valid calls that would
otherwise be executed at runtime, not for static initializers, it's
avoiding optimizations that would result in the loss of floating-point
exception flag raising.
--
Joseph S. Myers
joseph@codesourcery.com
next prev parent reply other threads:[~2021-07-30 16:34 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-30 15:30 Stefan Kanthak
2021-07-30 16:33 ` Joseph Myers [this message]
2021-07-30 19:53 ` Stefan Kanthak
2021-07-30 20:51 ` Joseph Myers
2021-07-30 21:54 ` Stefan Kanthak
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