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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/112361] [14 Regression] avx512f-reduce-op-1.c
 miscompiled since r14-5076
Date: Tue, 07 Nov 2023 21:38:02 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112361

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Robin Dapp <rdapp@gcc.gnu.org>:

https://gcc.gnu.org/g:fd940d248bfccb6994794152681dc4c693160919

commit r14-5231-gfd940d248bfccb6994794152681dc4c693160919
Author: Robin Dapp <rdapp@ventanamicro.com>
Date:   Mon Nov 6 11:24:37 2023 +0100

    vect/ifcvt: Add vec_cond fallback and check for vector versioning.

    This restricts tree-ifcvt to only create COND_OPs when we versioned the
    loop for vectorization.  Apart from that it re-creates a VEC_COND_EXPR
    in vect_expand_fold_left if we emitted a COND_OP.

    gcc/ChangeLog:

            PR tree-optimization/112361
            PR target/112359
            PR middle-end/112406

            * tree-if-conv.cc (convert_scalar_cond_reduction): Remember if
            loop was versioned and only then create COND_OPs.
            (predicate_scalar_phi): Do not create COND_OP when not
            vectorizing.
            * tree-vect-loop.cc (vect_expand_fold_left): Re-create
            VEC_COND_EXPR.
            (vectorize_fold_left_reduction): Pass mask to
            vect_expand_fold_left.

    gcc/testsuite/ChangeLog:

            * gcc.dg/pr112359.c: New test.=