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[wwwdocs] gcc-3.4/changes.html update
- From: Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>
- To: gcc-patches at gcc dot gnu dot org
- Cc: jh at suse dot cz, gp at suse dot de
- Date: Sat, 3 Jan 2004 23:11:33 +0100
- Subject: [wwwdocs] gcc-3.4/changes.html update
Hello,
adds information about the new loop unroller pass.
Zdenek
Index: changes.html
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RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-3.4/changes.html,v
retrieving revision 1.82
diff -c -3 -p -r1.82 changes.html
*** changes.html 31 Dec 2003 21:22:58 -0000 1.82
--- changes.html 3 Jan 2004 22:05:11 -0000
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*** 136,141 ****
--- 136,152 ----
C++ and Java. The growth of large functions can now be limited via
<code>--param large-function-insns</code>
and <code>--param large-function-growth</code>.</li>
+ <li>A new cfg-level loop optimizer pass. It replaces the old loop unrolling
+ pass and adds two other loop transformations - loop peeling and loop
+ unswitching (enabled by <code>-funroll-loops</code>,
+ <code>-fpeel-loops</code> and <code>-funswitch-loops</code> flags,
+ respectively). It also uses the profile feedback to limit the code
+ growth.
+
+ <p>The old loop unroller still can be enabled by
+ <code>-fold-unroll-loops</code> flags and in some cases it may produce
+ a better code, especially when the webizer optimization pass is not
+ run.</p></li>
</ul>