On 02/07/2013 01:51 PM, Duncan Sands wrote:
Hi Vladimir, thanks for these numbers.
...
Therefore I had to use *Dragonegg* (a GCC plugin which uses LLVM
backend instead of GCC backend) for generation of Fortran benchmarks
by LLVM.
...
I believe such progress is achieved mostly because of a *new RA*
introduced in LLVM 3.0 and *auto-vectorization*.
I don't think it can be auto-vectorization, because I forgot to turn
on the
LLVM auto-vectorizer in dragonegg-3.2 (oops!).
Thanks for pointing this out. I'll correct this.
I checked it is not switched on for CLANG too. As I understand this
stuff is experimental. I see on my small benchmarks that sometimes it
generates wrong code and in many cases slower code too.
