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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/102905] [12 regression] several vector test
 cases fail on power 7 after r12-4490
Date: Mon, 25 Oct 2021 06:40:00 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102905

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot =
gnu.org
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |ASSIGNED
          Component|testsuite                   |tree-optimization
   Last reconfirmed|                            |2021-10-25

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
As written in the commit log the existing code behaved odd and yes, possibly
powerpc is the only target with weird enough costs to trigger this.  The re=
v.
definitely changed behavior in some way.

I will see whether I can reproduce and adjust the thing according to my com=
ment
(where I was not sure whether it was worth the trouble - esp. without tests=
uite
coverage ...).=