http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49700
--- Comment #5 from Joost VandeVondele <Joost.VandeVondele at pci dot uzh.ch> 2011-07-12 10:17:54 UTC --- (In reply to comment #3) > Oh, so it's a sum ... > > Well, the I suppose you run into the usual array-prefetching compile-time hog. > Try -fno-prefetch-loop-arrays. This seems to reduce the time by 5x. On a non-LTO run, this doesn't matter, but I assume LTO makes more info available that triggers some action by that pass.
