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[Bug middle-end/40979] induct benchmark 60% slower when compiled with -fgraphite-identity
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 1 Feb 2011 11:35:22 +0000
- Subject: [Bug middle-end/40979] induct benchmark 60% slower when compiled with -fgraphite-identity
- Auto-submitted: auto-generated
- References: <bug-40979-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40979
--- Comment #13 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-02-01 11:35:08 UTC ---
It's unfortunate that graphite inserts arrays of size 1 instead of scalar
(memory) vars. Otherwise update-address-taken would just re-write those
into SSA after going out-of-graphite (if run, of course). It can probably
be teached to rewrite single-element arrays into SSA form as well.