------- Comment #7 from rguenth at gcc dot gnu dot org 2005-12-09 11:51 ------- > 2) If you do reorder the blocks, you should not merge indirect > branches on CPUs with BTBs, for better branch prediction.
I would rather say that you should not merge frequently executed indirect branches. There is certainly an upper bound of indirect branches after that merging is profitable again, and only disabling merging of frequently executed (from profile feedback) indirect branches and retaining merging of the seldom executed ones will probably be the best idea. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25285
