[Bug target/38306] [4.4 Regression] 15% slowdown of computational kernel

[jv244 at cam dot ac dot uk]

------- Comment #5 from jv244 at cam dot ac dot uk  2008-11-30 16:26 -------
(In reply to comment #4)
> 4.3:
> -O3 -march=native -funroll-loops  -ffast-math                  ==> 4.376
> -O3 -march=native -funroll-loops  -ffast-math -fschedule-insns ==> 3.372

strangely:

http://gcc.gnu.org/onlinedocs/gcc-4.3.2/gcc/Optimize-Options.html#Optimize-Options
suggests -fschedule-insns is enabled by default at -O3 ?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38306