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[Bug tree-optimization/79224] [7 Regression] Large C-Ray slowdown
- From: "marxin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 25 Jan 2017 10:14:21 +0000
- Subject: [Bug tree-optimization/79224] [7 Regression] Large C-Ray slowdown
- Auto-submitted: auto-generated
- References: <bug-79224-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79224
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-01-25
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
On my Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz, I see:
gcc c-ray-f.c -O3 -ffast-math -funroll-loops -march=core-avx2 -lm && cat scene
| time ./a.out -s 3000x2000:
r244442: 2434 milliseconds
r244441: 2310 milliseconds