[Bug tree-optimization/103494] [12 Regression] ice in vect_get_vec_defs_for_operand, at tree-vect-stmts.c:1476 since r12-5612-g10833849b55401a52f2334eb032a70beb688e9fc

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103494

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Sandiford <rsand...@gcc.gnu.org>:

https://gcc.gnu.org/g:7057b8f8c2fbb7a2112705c2962d92b8ccef7c30

commit r12-5632-g7057b8f8c2fbb7a2112705c2962d92b8ccef7c30
Author: Richard Sandiford <richard.sandif...@arm.com>
Date:   Tue Nov 30 17:32:36 2021 +0000

    vect: Fix ncopies calculation for emulated gather/scatter [PR103494]

    I was too eager about removing ncopies calculations in g:10833849b55.
    When emulating gather/scatter, the offset ncopies can be different from
    the data ncopies.  This patch restores the original calculation.

    gcc/
            PR tree-optimization/103494
            * tree-vect-stmts.c (vect_get_gather_scatter_ops): Remove ncopies
            argument and calculate ncopies from gs_info->offset_vectype
            where necessary.
            (vectorizable_store, vectorizable_load): Update accordingly.

    gcc/testsuite/
            PR tree-optimization/103494
            * gcc.dg/vect/pr103494.c: New test.
            * g++.dg/vect/pr103494.cc: Likewise.