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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/111597] pattern "(T)(A)+cst -->(T)(A+cst)" cause
 suboptimal for ppc64
Date: Tue, 26 Sep 2023 08:08:27 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111597

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
                 CC|                            |rguenth at gcc dot gnu.org

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
So it's only because the incoming x is sign-extended to long due to the ABI?
Seems to be a quite "localized" issue.  Btw, it was ppc folks requesting th=
is
pattern as a building block for a larger transform.

It's always difficult to use canonicalizations to do simplifications.=