[Bug tree-optimization/86270] Simple loop needs an extra register and an extra instruction

[jamborm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86270

Martin Jambor <jamborm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-linux
                 CC|                            |glisse at gcc dot gnu.org
               Host|                            |x86_64-linux

--- Comment #1 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Perhaps not surprisingly, this has been caused by r247398

commit 9222792c8c44836ab368a60442e96a81e313ec04
Author: glisse <glisse@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Fri Apr 28 20:51:05 2017 +0000

    Drop Z from X + Z < Y + Z

    2017-04-28  Marc Glisse  <marc.gli...@inria.fr>

    gcc/
            * match.pd (X+Z OP Y+Z, X-Z OP Y-Z, Z-X OP Z-Y): New
transformations.

    gcc/testsuite/
            * gcc.dg/tree-ssa/cmpexactdiv-2.c: Update for X-Z OP Y-Z.



    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@247398
138bc75d-0d04-0410-961f-82ee72b054a4