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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/94779] Bad optimization of simple switch
Date: Wed, 06 May 2020 15:12:46 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94779

Martin Li=C5=A1ka <marxin at gcc dot gnu.org> changed:

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

--- Comment #10 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #9)
> Martin, I think switchconv pass should use get_range_info and completely
> ignore labels with values outside of the range of the switch SSA_NAME ran=
ge
> (including the default label if all values in the SSA_NAME range have
> explicit case labels).
> That wouldn't change everything in this report, e.g. the #c0 one I think
> doesn't even make switchconv as it is lowered earlier.

Good point, I'll work on that!=