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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/104869] [12 Regression] Miscompilation of
 qt5-qtdeclarative since r12-6342-ge7a7dbb5ca5dd696
Date: Sun, 20 Mar 2022 14:02:48 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104869

rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rsandifo at gcc dot=
 gnu.org

--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.or=
g> ---
Mine.  The problem is in function_info::make_use_available,
which doesn't cope correctly with cases in which the start
of the BB comes =E2=80=9Cbetween=E2=80=9D two clobbers (in an RPO sense).=