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[GOOGLE] Writes annotation info in elf section.

From: Dehao Chen <dehao at google dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Cc: David Li <davidxl at google dot com>
Date: Tue, 11 Mar 2014 16:27:46 -0700
Subject: [GOOGLE] Writes annotation info in elf section.
Authentication-results: sourceware.org; auth=none

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

Attachment: diff.txt
Description: Text document

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