re PR tree-optimization/59591 (ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:156 for -march=core-avx2)
PR tree-optimization/59591
* tree-vect-stmts.c (vectorizable_mask_load_store): Fix up handling
of modifier = NARROW masked gathers.
(permute_vec_elements): Use gimple_get_lhs instead of
gimple_assign_lhs.
* gcc.dg/vect/pr59591-1.c: New test.
* gcc.dg/vect/pr59591-2.c: New test.
* gcc.target/i386/pr59591-1.c: New test.
* gcc.target/i386/pr59591-2.c: New test.