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[Bug middle-end/44382] Slow integer multiply
- From: "hjl dot tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 4 Jun 2010 13:56:25 -0000
- Subject: [Bug middle-end/44382] Slow integer multiply
- References: <bug-44382-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from hjl dot tools at gmail dot com 2010-06-04 13:56 -------
(In reply to comment #3)
> Yes, reassoc linearizes instead of building a tree (saves one (or was it two?)
> registers at best).
>
Should we always build a tree? It may increase register pressure.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44382