gcc 4.2.4 vs llvm-2.3/llvm-gcc-4.2.1

[Uros Bizjak]

Hello!

>   In case anyone is interested, I've run the polyhedron benchmarks
> on the stock gfortran from gcc 4.2.4 and on the llvm-gfortran from
> llvm 2.3/llvm-gcc-4.2.1 using the flags...
>
> -ffast-math -funroll-loops -msse3 -mark   
>
> on a 2.33 GHz MacBook Pro and the results were...
>
> Currently, llvm-gfortran only outperforms stock gfortran
> in code execution for aermod and induct benchmarks.  The
>   

Is it possible for you to profile executables and eventually figure out 
which (missing?) optimization is responsible for huge runtime difference 
for aermod and induct exec times? 50% and 33% difference should point to 
a serious problem in the generated code.

Thanks,
Uros.