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Subject: [Bug tree-optimization/103228] [9/10/11/12 Regression] missed
 optimization with |^ at the gimple level
Date: Tue, 16 Nov 2021 03:32:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103228

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:3200de91bc70bfd6d4b7b40e769bc82756b9b555

commit r12-5291-g3200de91bc70bfd6d4b7b40e769bc82756b9b555
Author: Andrew Pinski <apinski@marvell.com>
Date:   Mon Nov 15 22:55:09 2021 +0000

    tree-optimization: [PR103245] Improve detection of abs pattern using
multiplication

    So while working on PR 103228 (and a few others), I noticed the testcase
for PR 94785
    was failing. The problem is that the nop_convert moved from being inside
the IOR to be
    outside of it. I also noticed the patch for PR 103228 was not needed to
reproduce the
    issue either.
    This patch combines the two patterns together for the abs match when us=
ing
multiplication
    and adds a few places where nop_convert are optional.

    OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

            PR tree-optimization/103245

    gcc/ChangeLog:

            * match.pd: Combine the abs pattern matching using multiplicati=
on.
            Adding optional nop_convert too.

    gcc/testsuite/ChangeLog:

            * gcc.dg/tree-ssa/pr103245-1.c: New test.=