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[Bug rtl-optimization/32084] gfortran 4.3 13%-18% slower for induct.f90 than gcc 4.0-based competitor
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 28 Jun 2007 12:59:10 -0000
- Subject: [Bug rtl-optimization/32084] gfortran 4.3 13%-18% slower for induct.f90 than gcc 4.0-based competitor
- References: <bug-32084-13404@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #14 from ubizjak at gmail dot com 2007-06-28 12:59 -------
(In reply to comment #13)
> core2 AMD
> 0m45.215s 0m4.312s (no vectorize)
Ehm, the first is full induct.f90 run on _nocona_, whereas AMD is the result of
running the attached test. The table with comparable results is then:
(gfortran -march=nocona -msse3 -O3 -ffast-math -mfpmath=sse -funroll-loops)
nocona(32) AMD(64)
0m4.176s 0m4.312s (no vectorize)
0m8.169s 0m4.668s -ftree-vectorize
0m4.108s 0m4.300s -ftree-vectorize -fvect-cost-model
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32084