[LLVMdev] Indirect call site profiling

[Diego Novillo]

On 11/05/14 13:52, Philip Reames wrote:
>
> On 11/03/2014 09:21 AM, Diego Novillo wrote:
>> A note on the profile. The sample pgo profiler tracks indirect 
>> function calls via sampling at the call sites. Currently this data is 
>> not being used in optimizations, but it's captured in the sample 
>> profiles (lib/Transforms/Scalar/SampleProfile.cpp).
> We also have a custom profiling mechanism which collects similar 
> data.  It seems like moving forward with a common metadata format to 
> exploit this would be interesting.

Absolutely. Currently, it's represented by class FunctionSamples 
(include/llvm/ProfileData/SampleProf.h). I'm not particularly attached 
to its encoding, so I'm open to any common representation we can use for 
other profile sources.


Diego.