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Re: [PATCH] PR libstdc++/87431 re-adjust never-valueless optimizations

From: Jonathan Wakely <jwakely at redhat dot com>
To: Antony Polukhin <antoshkka at gmail dot com>
Cc: libstdc++ at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org, Ville Voutilainen <ville dot voutilainen at gmail dot com>, Tim Shen <timshen91 at gmail dot com>
Date: Thu, 4 Apr 2019 11:35:58 +0100
Subject: Re: [PATCH] PR libstdc++/87431 re-adjust never-valueless optimizations
References: <20190403162543.GO943@redhat.com> <CAKqmYPY-r3z4hk0jG208qjPy+ZADcupvy2rsiGWNMqrMmQ-n1g@mail.gmail.com> <20190403222726.GT943@redhat.com>

On 03/04/19 23:27 +0100, Jonathan Wakely wrote:

On 03/04/19 23:32 +0300, Antony Polukhin wrote:

Looks good. Covers most of the use cases.

Please consider adding filesystem::path, pair, tuple, string_view?,


string_view is trivially_copyable, and < 256 bytes, so works
automatically.

error_code, list, deque (myabe all the other containers), optional, variant
itself (for cases when variant holds another variant).


I hadn't thought about error_code and recursive variants, I'll check
those can be made to work.


error_code is trivially copyasble and small, so handled automatically.

References:
- [PATCH] PR libstdc++/87431 re-adjust never-valueless optimizations
  - From: Jonathan Wakely
- Re: [PATCH] PR libstdc++/87431 re-adjust never-valueless optimizations
  - From: Antony Polukhin
- Re: [PATCH] PR libstdc++/87431 re-adjust never-valueless optimizations
  - From: Jonathan Wakely

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