[Bug tree-optimization/106378] Miss to handle ifn .LEN_STORE in DSE

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106378

--- Comment #3 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:dc477ffb4aba21e9cf47de22a4df6f2b23849505

commit r13-1778-gdc477ffb4aba21e9cf47de22a4df6f2b23849505
Author: Richard Biener <rguenther@suse.de>
Date:   Thu Jul 21 10:13:46 2022 +0200

    tree-optimization/106378 - DSE of LEN_STORE and MASK_STORE

    The following enhances DSE to handle LEN_STORE (optimally) and
    MASK_STORE (conservatively).

            PR tree-optimization/106378
            * tree-ssa-dse.cc (initialize_ao_ref_for_dse): Handle
            LEN_STORE, add mode to initialize a may-def and handle
            MASK_STORE that way.
            (dse_optimize_stmt): Query may-defs.  Handle internal
            functions LEN_STORE and MASK_STORE similar to how
            we handle memory builtins but without byte tracking.