From: jgd@cix.co.uk   
      
   In article , seaohveh@hoffmanlabs.invalid   
   (Stephen Hoffman) wrote:   
      
   > The Itanium compiler optimizer just doesn't (and can't) know enough   
   > about the system memory state, yes. Among other (no pun intended)   
   > issues.   
   >   
   > The attempt to address that included providing run-time feedback   
   > into the executables; providing post-link, post-execution tuning.   
   > (Caliper / Atom / OM / etc.)   
      
   "Attempt" is about right.   
      
   I did several years porting work to Itanium. I tried run-time feedback   
   zero times: doing the link of the instrumented build took over an hour,   
   up from about a minute, because it was doing all the code generation at   
   link time.   
      
   The claim was "you only do this for the build you'll ship." My response   
   was "The compiler is so immature that I'm reporting new bugs every week,   
   and you want me to give the compiler new and difficult challenges?"   
      
   I never heard of anyone who got anywhere with profile-guided optimisation   
   on Itanium. Have you?   
      
   John   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)