Add 'cold' attribute to functions

[Diego Novillo]

On 2013-04-11 07:25 , Jakub Staszak wrote:
> Hi Diego,
>
> calcColdCallHeuristics is called before calcLoopBranchHeuristics, so if CC compute the weight, the Loop Heuristics are skipped. I believe (although I might be wrong) that LH are more reliable and they should be called first.

Perhaps.  But the working assumption here is that if the user has marked 
a function as cold, then every time we see a call to it, we should 
really de-prioritize any paths through it.  I don't have a specific test 
case that would help convince me one way or the other, though.

I'm not really used to the way this analysis works, however.  I was 
expecting some sort of aggregate weight computation that would leave 
weights in the edges.  But this will choose exactly one.

Chandler, any thoughts on this?


Diego.