[Bug middle-end/45422] [4.6 Regression] compile time increases 3x.

[xinliangli at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45422

--- Comment #36 from davidxl <xinliangli at gmail dot com> 2011-01-25 17:28:30 UTC ---
(In reply to comment #35)
> (In reply to comment #34)
> > -march=native is ambiguous, please see with -v what actually is being used.
> 
> This was mentioned in the initial comment:
> -march=k8-sse3 -mcx16 -msahf
> --param l1-cache-size=64 --param l1-cache-line-size=64 --param
> l2-cache-size=1024 -mtune=k8
> 
> The latest timings are on a newer machine (old one is gone now) which has:
> -march=amdfam10 -mcx16 -msahf -mpopcnt -mabm --param l1-cache-size=64 --param
> l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amdfam10

I did use the options you originally posted "-ftime-report -cpp -fbounds-check
-g -O3 -ffast-math -funroll-loops -ftree-vectorize -march=native -ffree-form".
The timing is consistently 58s on my 2.4Ghz core-2 box, and 42s on the 2.67Ghz
Xeon machine.