From: Alexander Monakov <amonakov@ispras.ru>
To: musl@lists.openwall.com
Subject: Re: Documentation of memcpy and undefined behavior in memset
Date: Thu, 6 Jul 2017 20:02:12 +0300 (MSK) [thread overview]
Message-ID: <alpine.LNX.2.20.13.1707061957580.21060@monopod.intra.ispras.ru> (raw)
In-Reply-To: <20170706162353.GC1627@brightrain.aerifal.cx>
On Thu, 6 Jul 2017, Rich Felker wrote:
> FWIW, I think GCC may do aggressive optimization based on the
> assumption that memcpy implies the pointer points to an object (of
> size at least 1)
The compiler can deduce that the pointer is non-null (and that's
fine), but otherwise I don't see what possible optimizations could
take place. Did you have something specific in mind?
Alexander
next prev parent reply other threads:[~2017-07-06 17:02 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-06 14:15 Pascal Cuoq
2017-07-06 15:52 ` Alexander Monakov
2017-07-06 16:23 ` Rich Felker
2017-07-06 17:02 ` Alexander Monakov [this message]
2017-07-06 17:11 ` Rich Felker
2017-07-06 17:17 ` Alexander Monakov
2017-07-06 17:22 ` Rich Felker
2017-07-06 17:38 ` Alexander Monakov
2017-07-06 18:13 ` Rich Felker
2017-07-06 18:52 ` Jens Gustedt
2017-07-06 19:23 ` Szabolcs Nagy
2017-07-06 23:52 ` Jens Gustedt
2017-07-06 19:05 ` Bartosz Brachaczek
2017-07-06 19:10 ` Leah Neukirchen
2017-07-06 19:28 ` Szabolcs Nagy
2017-07-06 16:29 ` Szabolcs Nagy
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