> L.S., > > On our weather forecasting code (compiled with -O3 -flto and linked with > -O3 -flto -fwhole-program) I get a speedup of 65 seconds per time step > in the model integration vs. 75 seconds with -O3 alone.
There is bug making -fwhole-program disabled with LTO compilations. I hope to get this fixed in mainline tomorrow. It will be interesting to see how much difference -fwhole-program makes for you. Also ipa-sra was finally enabled at -O2 and I would be greatly interested if it makes any difference (in general it should help to fortran codebases by eliminating need to pass stuff around by reference) Honza
