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[GOOGLE] Adjust profile for AutoFDO

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: Fri, 24 Jan 2014 21:28:15 -0800
Subject: [GOOGLE] Adjust profile for AutoFDO
Authentication-results: sourceware.org; auth=none

This patch fixes performance regression for AutoFDO. When the entry
block count is 0, which is quite possible in AutoFDO, it can still
make right optimization decision.

Bootstrapped passed regression test and performance test (improve 0.5%
on average).

OK for google-4_8?

Thanks,
Dehao

Attachment: diff.txt
Description: Text document

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- Re: [GOOGLE] Adjust profile for AutoFDO
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