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Re: [patch][wwwdocs] gcc 4.8 changes - mention scalability improvements
- From: Gerald Pfeifer <gerald at pfeifer dot com>
- To: Steven Bosscher <stevenb dot gcc at gmail dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Wed, 2 Jan 2013 19:11:33 -1000 (TAHT)
- Subject: Re: [patch][wwwdocs] gcc 4.8 changes - mention scalability improvements
- References: <CABu31nMtnHMUOwC5RvTU_07k_OW65Q-DV++OUM--FSyX-kXToQ@mail.gmail.com>
On Sun, 14 Oct 2012, Steven Bosscher wrote:
> This patch adds a short notice about some speed-ups in GCC 4.8 for
> extremely large functions (coming from the work done on PR54146 by
> several people). OK for the wwwdocs?
Thanks. Somehow I kept stumbling over the second sentence, so
finally I went ahead a adjusted it a bit. (This also describes
previous situation not _as_ negatively.)
Gerald
Tweak rationale of removing -fipa-struct-reorg and -fipa-matrix-reorg.
--- changes.orig 2012-12-21 16:15:03.628627198 -1000
+++ changes.html 2013-01-02 17:56:51.343937379 -1000
@@ -82,8 +82,9 @@
<li>The struct reorg and matrix reorg optimizations (command-line
options <code>-fipa-struct-reorg</code> and
<code>-fipa-matrix-reorg</code>) have been removed. They did not
- work correctly nor with link-time optimization (LTO), hence were only
- applicable to programs consisting of a single translation unit.
+ always work correctly, nor did they work with link-time optimization
+ (LTO), hence were only applicable to programs consisting of a single
+ translation unit.
</li>
<li>Several scalability bottle-necks have been removed from GCC's
optimization passes. Compilation of extremely large functions,