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27% regression of gcc 4.3 performance on cpu2k6/calculix
- From: Grigory Zagorodnev <grigory_zagorodnev at linux dot intel dot com>
- To: gcc at gcc dot gnu dot org, dnovillo at redhat dot com
- Cc: "H. J. Lu" <hjl at lucon dot org>
- Date: Mon, 15 Jan 2007 17:59:31 +0300
- Subject: 27% regression of gcc 4.3 performance on cpu2k6/calculix
Hi!
There is a huge regression of gcc 4.3 performance detected on
cpu2006/454.calculix benchmark at -O2 optimization level on
x86_64-redhat-linux.
Regression is caused by mem-ssa merge 12/12/2006 (revision 119760).
http://gcc.gnu.org/viewcvs?view=rev&revision=119760
PS: I'm trying to get a small reproducer
- Grigory