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Re: basic_block flags, BB_VISITED

From: Nathan Sidwell <nathan at acm dot org>
To: Richard Biener <richard dot guenther at gmail dot com>, Thomas Schwinge <thomas at codesourcery dot com>
Cc: GCC Development <gcc at gcc dot gnu dot org>, GCC Patches <gcc-patches at gcc dot gnu dot org>, kugan dot vivekanandarajah at linaro dot org
Date: Fri, 14 Oct 2016 07:00:04 -0400
Subject: Re: basic_block flags, BB_VISITED
Authentication-results: sourceware.org; auth=none
References: <8760ov2wbg.fsf@hertz.schwinge.homeip.net> <CAFiYyc3A-3067L4uZpeDszyK-Omq9v=9z=Sp6qyZHYjtUMpCXw@mail.gmail.com>

On 10/14/16 05:28, Richard Biener wrote:

The BB_VISITED flag has indetermined state at the beginning of a pass.
You have to ensure it is cleared yourself.

In that case the openacc (&nvptx?) passes should be modified to clear the flagsat their start, rather than at their end.


nathan

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References:
- basic_block flags, BB_VISITED
  - From: Thomas Schwinge
- Re: basic_block flags, BB_VISITED
  - From: Richard Biener

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