[Bug 111405] Some infinite 'do{}while' loops lead mesa to an infinite compilation

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111405

Jason Ekstrand <jason at jlekstrand.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #6 from Jason Ekstrand <jason at jlekstrand.net> ---
Fixed by the following commit now in master:

commit c832820ce959ae7c2b4971befceae634d800330f (HEAD -> master, origin/master,
origin/HEAD)
Author: Jason Ekstrand <jason at jlekstrand.net>
Date:   Fri Aug 30 11:35:26 2019 -0500

    nir/dead_cf: Repair SSA if the pass makes progress

    The dead_cf pass calls into the CF manipulation helpers which attempt to
    keep NIR's SSA form sane.  However, when the only break is removed from
    a loop, dominance gets messed up anyway because the CF SSA clean-up code
    only looks at phis and doesn't consider the case of code becoming
    unreachable.  One solution to this would be to put the loop into LCSSA
    form before we modify any of its contents.  Another (and the approach
    taken by this pass) is to just run the repair_ssa pass afterwards
    because the CF manipulation helpers are smart enough to keep all the
    use/def stuff sane; they just don't always preserve dominance
    properties.

    While we're here, we clean up some bogus indentation.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111405
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111069
    Cc: mesa-stable at lists.freedesktop.org
    Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira at intel.com>

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