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[wwwdocs] gcc 4.8 changes - mention scalability improvements

Message ID alpine.LNX.2.00.1301021757050.15650@tuna.site
State New
Headers show

Commit Message

Gerald Pfeifer Jan. 3, 2013, 5:11 a.m. UTC 
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.
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Patch

--- 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,