From: Simon Marchi <simon.marchi@polymtl.ca>
To: John Baldwin <jhb@freebsd.org>
Cc: gdb-patches@sourceware.org
Subject: Re: [PATCH 3/3] Do not use std::move when assigning an anonymous object to a unique_ptr.
Date: Wed, 23 Nov 2016 21:19:00 -0000 [thread overview]
Message-ID: <f98690353911d4c4c1ea59c45d5b085f@polymtl.ca> (raw)
In-Reply-To: <20161123200652.89209-4-jhb@FreeBSD.org>
On 2016-11-23 15:06, John Baldwin wrote:
> Using std::move forces an extra copy of the object. These changes fix
> -Wpessimizing-move warnings from clang.
For those who, like me, do not quite understand what is happening here,
I suggest the following read:
https://www.ibm.com/developerworks/community/blogs/5894415f-be62-4bc0-81c5-3956e82276f3/entry/RVO_V_S_std_move?lang=en
next prev parent reply other threads:[~2016-11-23 21:19 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-23 20:07 [PATCH 0/3] Fix various C++ related clang warnings John Baldwin
2016-11-23 20:08 ` [PATCH 2/3] Add noexcept to custom non-throwing new operators John Baldwin
2016-11-24 17:03 ` Pedro Alves
2016-11-23 20:08 ` [PATCH 3/3] Do not use std::move when assigning an anonymous object to a unique_ptr John Baldwin
2016-11-23 21:19 ` Simon Marchi [this message]
2016-11-23 23:31 ` John Baldwin
2016-11-24 0:08 ` Simon Marchi
2016-11-24 16:52 ` Pedro Alves
2016-11-23 20:08 ` [PATCH 1/3] Fix mismatched struct vs class tags John Baldwin
2016-11-23 20:58 ` Simon Marchi
2016-11-23 23:23 ` John Baldwin
2016-11-24 17:02 ` Pedro Alves
2016-11-24 17:47 ` John Baldwin
2016-11-24 18:50 ` Pedro Alves
2016-11-24 19:15 ` John Baldwin
2016-11-30 11:39 ` Pedro Alves
2016-11-30 16:23 ` John Baldwin
2016-11-30 16:38 ` Pedro Alves
2016-11-30 16:52 ` Simon Marchi
2016-11-30 16:51 ` Simon Marchi
2016-11-30 17:08 ` Pedro Alves
2016-11-30 17:54 ` Simon Marchi
2016-11-30 17:59 ` Eli Zaretskii
2016-11-23 22:18 ` [PATCH 0/3] Fix various C++ related clang warnings Simon Marchi
2016-11-23 23:23 ` John Baldwin
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