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Re: Is profiledbootstrap supposed to work currently?

From: Andrew Pinski <pinskia at physics dot uc dot edu>
To: Richard Guenther <rguenth at tat dot physik dot uni-tuebingen dot de>
Cc: gcc at gcc dot gnu dot org
Date: Tue, 5 Oct 2004 10:27:07 -0400
Subject: Re: Is profiledbootstrap supposed to work currently?
References: <Pine.LNX.4.44.0410051620290.10994-100000@alwazn.tat.physik.uni-tuebingen.de>

On Oct 5, 2004, at 10:22 AM, Richard Guenther wrote:

Trying profiledbootstrap today on ia32-linux leads to

is this supposed to happen at the moment, i.e. are there pending fixes, or is this a genuine bug?


This was caused by the fact -funroll-loops is supplied only when
-fprofile-use is supplied and some unrolling is done on the tree level
but profiling is done on the RTL level so there is a mismatch.

This is PR 14684.

A workaround is to change -fprofile-generate to imply -funroll-loops too.

The correct fix is most likely not going to happen fully until 4.1 with
tree based profiling.

Thanks,
Andrew Pinski

Follow-Ups:
- Re: Is profiledbootstrap supposed to work currently? [PR bootstrap/14684]
  - From: Kelley Cook

References:
- Is profiledbootstrap supposed to work currently?
  - From: Richard Guenther

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