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Subject: [Bug target/99912] Unnecessary / inefficient spilling of AVX2 ymm
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Date: Tue, 27 Apr 2021 13:17:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99912

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

https://gcc.gnu.org/g:d8e1f1d24179690fd9c0f63c27b12e030010d9ea

commit r12-155-gd8e1f1d24179690fd9c0f63c27b12e030010d9ea
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Apr 7 12:09:44 2021 +0200

    tree-optimization/99912 - schedule DSE before SRA

    For the testcase in the PR the main SRA pass is unable to do some
    important scalarizations because dead stores of addresses make
    the candiate variables disqualified.  The following patch adds
    another DSE pass before SRA forming a DCE/DSE pair and moves the
    DSE pass that is currently closely after SRA up to after the
    next DCE pass, forming another DCE/DSE pair now residing after PRE.

    2021-04-07  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/99912
            * passes.def (pass_all_optimizations): Add pass_dse before
            the first pass_dce, move the first pass_dse before the
            pass_dce following pass_pre.

            * gcc.dg/tree-ssa/ldist-33.c: Disable PRE and LIM.
            * gcc.dg/tree-ssa/pr96789.c: Adjust dump file scanned.
            * gcc.dg/tree-ssa/ssa-dse-28.c: Likewise.
            * gcc.dg/tree-ssa/ssa-dse-29.c: Likewise.=