On Aug 2, 2011, at 12:51 AM, Paolo Bonzini wrote: > On 08/01/2011 09:10 PM, Dimitrios Apostolou wrote: >> >> Keeping my patch exactly the same, just changing the >> hook_void_hard_reg_set to receive a (HOST_WIDEST_FAST_INT *) arg and >> doing the necessary typecasts, added an extra 3 M instructions. >> >> But the ix86_live_on_entry is only called 1233x times from df-scan.c. >> This isn't enough to explain all this overhead. > > Indeed, 0.2% is hard to attribute to anything anyway.
Only if you lack the tools to collect data. :-(
