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Re: Default std::vector<bool> default and move constructor

From: Marc Glisse <marc dot glisse at inria dot fr>
To: François Dumont <frs dot dumont at gmail dot com>
Cc: libstdc++ at gcc dot gnu dot org, gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Tue, 16 May 2017 23:35:09 +0200 (CEST)
Subject: Re: Default std::vector<bool> default and move constructor
Authentication-results: sourceware.org; auth=none
References: <cda87f91-d9fd-692b-f60e-dcc92728f02e@gmail.com> <alpine.DEB.2.20.1705152113210.1993@stedding.saclay.inria.fr> <cc64bc7a-aa2b-eb49-82bf-d59591429ff3@gmail.com>
Reply-to: libstdc++ at gcc dot gnu dot org

On Tue, 16 May 2017, François Dumont wrote:

What is match.pd ?

It is a file in gcc where we describe simple pattern-matchingoptimizations. In this case, IIRC, the missing transformations were* ptr + n == ptr + 1 --> n == 1 (we already do it if 1 is replaced by avariable or 0)

* ((n/8)+1)*8 --> n+8 when the division is known to be exact

--
Marc Glisse

References:
- Default std::vector<bool> default and move constructor
  - From: François Dumont
- Re: Default std::vector<bool> default and move constructor
  - From: Marc Glisse
- Re: Default std::vector<bool> default and move constructor
  - From: François Dumont

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