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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/96565] Failure to optimize out VLA even
 though it is left unused
Date: Thu, 27 Aug 2020 06:07:43 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96565

--- Comment #11 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:989bc4ca2f2978baecff00f6d0532994b82897ef

commit r11-2899-g989bc4ca2f2978baecff00f6d0532994b82897ef
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Aug 26 08:44:59 2020 +0200

    tree-optimization/96565 - improve DSE with paths ending in noreturn

    This improves DSEs stmt walking by not considering a DEF without
    uses for further processing (and thus giving up when there's two
    paths to follow).

    2020-08-26  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/96565
            * tree-ssa-dse.c (dse_classify_store): Remove defs with
            no uses from further processing.

            * gcc.dg/tree-ssa/ssa-dse-40.c: New testcase.
            * gcc.dg/builtin-object-size-4.c: Adjust.=