This extends the PR65518 workaround to also apply for single-lane SLP.
* tree-vect-stmts.cc (get_group_load_store_type): For SLP also
check for the PR65518 single-element interleaving case as done in
vect_grouped_load_supported.
---
gcc/tree-vect-stmts.cc | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 1c30a0388ca..a01099d3456 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -2154,6 +2154,23 @@ get_group_load_store_type (vec_info *vinfo,
stmt_vec_info stmt_info,
}
overrun_p = true;
}
+
+ /* If this is single-element interleaving with an element
+ distance that leaves unused vector loads around punt - we
+ at least create very sub-optimal code in that case (and
+ blow up memory, see PR65518). */
+ if (loop_vinfo
+ && *memory_access_type == VMAT_CONTIGUOUS
+ && SLP_TREE_LOAD_PERMUTATION (slp_node).exists ()
+ && single_element_p
+ && maybe_gt (group_size, TYPE_VECTOR_SUBPARTS (vectype)))
+ {
+ if (dump_enabled_p ())
+ dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
+ "single-element interleaving not supported "
+ "for not adjacent vector loads\n");
+ return false;
+ }
}
}
else
--
2.35.3
