[GOOGLE] Writes annotation info in elf section.

[Xinliang David Li]

Why is it not enough to emit warnings during build time when source
code changes signifcantly?

David

On Tue, Mar 11, 2014 at 4:27 PM, Dehao Chen <dehao@google.com> wrote:
> During AutoFDO annotation, we want to record the annotation stats into
> an elf section, so that we can calculate how much percentage of the
> profile is annotated, which can be used as an indicator whether code
> has changed significantly comparing with the profiled source.
>
> Bootstrapped and performance test on-going.
>
> OK for google-4_8?
>
> Thanks,
> Dehao