[LLVMdev] Indirect call site profiling

[Diego Novillo]

On 11/03/14 12:12, betulb at codeaurora.org wrote:
>
>> I'll be interested in seeing your work.  I'm interested in techniques
>> for guarded devirtualization, but the profiling infrastructure should be
>> fairly common.  If we could arrange the instrumentation in such a way to
>> enable both use cases, we could share infrastructure.
> Thanks, we've recently posted an RFC on the design. The design is quite
> straightforward and simple but the gains will be seen when the data is
> used in optimizations.

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).


Diego.