16 Dec
2010
16 Dec
'10
11:57 p.m.
Mark Mitchell wrote:
If Profile Guiding could spot that a particular callsite to say strlen() was often associated with strings of at least 'n' characters we could call a different implementation.
I don't believe this is possible current profile-guided optimization, but certainly it could be done.
It looks to me like a case of value profiling, see tree-profile.c, for the various "stringops" optimizations. Unless I misunderstand David's idea here or missing something else, it seems that this kind of optimization should fit in the existing infrastructure without too much effort.
Ciao! Steven