[Bug tree-optimization/117041] [15 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: in vectorizable_load, at tree-vect-stmts.cc:10327

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117041

--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>:

https://gcc.gnu.org/g:72c83f644dea755b4eba427aabde45f5d3694d9b

commit r15-4201-g72c83f644dea755b4eba427aabde45f5d3694d9b
Author: Richard Biener <rguent...@suse.de>
Date:   Wed Oct 9 11:42:59 2024 +0200

    tree-optimization/117041 - fix load classification of former grouped load

    When we first detect a grouped load but later dis-associate it we
    only set DR_GROUP_FIRST_ELEMENT to NULL, indicating it is not a
    STMT_VINFO_GROUPED_ACCESS but leave DR_GROUP_NEXT_ELEMENT set.  This
    causes a stray DR_GROUP_NEXT_ELEMENT access in get_group_load_store_type
    to go wrong, indicating a load isn't single_element_p when it actually
    is, leading to wrong classification and an ICE.

            PR tree-optimization/117041
            * tree-vect-stmts.cc (get_group_load_store_type): Only
            check DR_GROUP_NEXT_ELEMENT for STMT_VINFO_GROUPED_ACCESS.

            * gcc.dg/torture/pr117041.c: New testcase.