[Bug gcov-profile/54487] [4.8 Regression] profiledbootstrap broken by r190952

[tejohnson at google dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54487

--- Comment #18 from Teresa Johnson <tejohnson at google dot com> 2012-09-11 17:39:00 UTC ---
On Tue, Sep 11, 2012 at 10:29 AM, hjl.tools at gmail dot com
<gcc-bugzilla@gcc.gnu.org> wrote:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54487
>
> --- Comment #17 from H.J. Lu <hjl.tools at gmail dot com> 2012-09-11 17:29:15 UTC ---
> Thanks for looking into it.  This is a long standing problem.
> I have seen random profiledbootstrap failures for a long time.

Thanks for confirming that this has happened prior. Unfortunately the
addition of the histogram is likely making this more frequent, due to
the changing summary sizes after merging. One way to deal with this
for now might be to write all histogram entries (even the 0 ones) into
the summary to keep the size static.

Honza, what do you think?

Teresa

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