This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: food for optimizer developers
Steve Kargl wrote:
# gfc4x 9.814 9.358 8.622 9.810 Note1 9.172 8.958 9.022
Column 5 compiled with -march=native -O2 -ffast-math
# Note 1: STOP DLAMC1 failure (10)
That's probably because a standard compile of the LAPACK sources only
compiles {S|D}LAM* with -O0.
The code is simply not written for any higher optimization (i.e., it
assumes the compiler more or less compiles it "literally").
Cheers,
--
Toon Moene - e-mail: toon@moene.org - phone: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
At home: http://moene.org/~toon/; weather: http://moene.org/~hirlam/
Progress of GNU Fortran: http://gcc.gnu.org/gcc-4.5/changes.html#Fortran