[PATCH] tree-optimization/117554 - correct single-element interleaving check

[Richard Biener]

In addition to a single DR we also require a single lane, not a splat.

Boostrap and regtest running on x86_64-unknown-linux-gnu.

        PR tree-optimization/117554
        * tree-vect-stmts.cc (get_group_load_store_type): We can
        use gather/scatter only for a single-lane single element group
        access.
---
 gcc/tree-vect-stmts.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index baf49ec4cf1..3ad3b9bf371 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -2277,6 +2277,7 @@ get_group_load_store_type (vec_info *vinfo, stmt_vec_info 
stmt_info,
   if ((*memory_access_type == VMAT_ELEMENTWISE
        || *memory_access_type == VMAT_STRIDED_SLP)
       && single_element_p
+      && SLP_TREE_LANES (slp_node) == 1
       && loop_vinfo
       && vect_use_strided_gather_scatters_p (stmt_info, loop_vinfo,
                                             masked_p, gs_info))
-- 
2.43.0