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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/103771] [12/13/14 Regression] Missed vectorization under
 -mavx512f -mavx512vl after r12-5489
Date: Mon, 08 May 2023 07:38:12 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103771

--- Comment #43 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:69f1a8af45d8a42003c21489019ddfb01d88d30d

commit r14-573-g69f1a8af45d8a42003c21489019ddfb01d88d30d
Author: Andrew Pinski <apinski@marvell.com>
Date:   Wed Apr 26 14:55:46 2023 -0700

    PHIOPT: Add diamond bb form to factor_out_conditional_conversion

    So the function factor_out_conditional_conversion already supports
    diamond shaped bb forms, just need to be called for such a thing.

    harden-cond-comp.c needed to be changed as we would optimize out the
    conversion now and that causes the compare hardening not needing to
    split the block which it was testing. So change it such that there
    would be no chance of optimization.

    Also add two testcases that showed the improvement. PR 103771 is
    solved in ifconvert also for the vectorizer but now it is solved
    in a general sense.

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

            PR tree-optimization/49959
            PR tree-optimization/103771

    gcc/ChangeLog:

            * tree-ssa-phiopt.cc (pass_phiopt::execute): Support
            Diamond shapped bb form for factor_out_conditional_conversion.

    gcc/testsuite/ChangeLog:

            * c-c++-common/torture/harden-cond-comp.c: Change testcase
            slightly to avoid the new phiopt optimization.
            * gcc.dg/tree-ssa/abs-2.c: New test.
            * gcc.dg/tree-ssa/pr103771.c: New test.=