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[Bug middle-end/40979] induct benchmark 60% slower when compiled with -fgraphite-identity
- From: "dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 31 Jan 2011 18:46:33 +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 #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-01-31 18:46:23 UTC ---
> I looked at how to improve translate_scalar_reduction_to_array in
> order to avoid the creation of the temporary array, but it seems to be
> difficult as the result is written to memory under a different type
> than the reduction itself: l12_lower is a real whereas l12 is an
> integer:
In the original code l12 is real (kind = longreal) as l12_lower, but making the
change does not help the vectorization.