[Bug tree-optimization/94398] ICE: in vectorizable_load, at tree-vect-stmts.c:9173

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94398

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Sandiford <rsandifo@gcc.gnu.org>:

https://gcc.gnu.org/g:f14b41d27124601284347a10d496362c8b4b8e1c

commit r10-7481-gf14b41d27124601284347a10d496362c8b4b8e1c
Author: Felix Yang <felix.yang@huawei.com>
Date:   Tue Mar 31 16:41:56 2020 +0800

    vect: ICE: in vectorizable_load, at tree-vect-stmts.c:9173 [PR94398]

    In the testcase for PR94398, we're trying to compute:

      alignment_support_scheme
        = vect_supportable_dr_alignment (first_dr_info, false);
      gcc_assert (alignment_support_scheme);

    even for VMAT_GATHER_SCATTER, which always accesses individual elements.
    Here we should set alignment_support_scheme to dr_unaligned_supported
    the gather/scatter case instead of calling vect_supportable_dr_alignment.

    2020-03-31  Felix Yang  <felix.yang@huawei.com>

    gcc/
            PR tree-optimization/94398
            * tree-vect-stmts.c (vectorizable_store): Instead of calling
            vect_supportable_dr_alignment, set alignment_support_scheme to
            dr_unaligned_supported for gather-scatter accesses.
            (vectorizable_load): Likewise.

    gcc/testsuite/
            PR tree-optimization/94398
            * gcc.target/aarch64/pr94398.c: New test.