The following removes the code cancelling SLP if we can use
load/store-lanes from the main loop vector analysis code.
* tree-vect-loop.cc (vect_analyze_loop_2): Do not cancel SLP
when store-lanes can be used.
---
gcc/tree-vect-loop.cc | 76 -------------------------------------------
1 file changed, 76 deletions(-)
diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index 6456220cdc9..8290776ec2c 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -2957,82 +2957,6 @@ start_over:
"unsupported SLP instances\n");
goto again;
}
-
- /* Check whether any load in ALL SLP instances is possibly permuted. */
- slp_tree load_node, slp_root;
- unsigned i, x;
- slp_instance instance;
- bool can_use_lanes = true;
- FOR_EACH_VEC_ELT (LOOP_VINFO_SLP_INSTANCES (loop_vinfo), x, instance)
- {
- slp_root = SLP_INSTANCE_TREE (instance);
- int group_size = SLP_TREE_LANES (slp_root);
- tree vectype = SLP_TREE_VECTYPE (slp_root);
- bool loads_permuted = false;
- FOR_EACH_VEC_ELT (SLP_INSTANCE_LOADS (instance), i, load_node)
- {
- if (!SLP_TREE_LOAD_PERMUTATION (load_node).exists ())
- continue;
- unsigned j;
- stmt_vec_info load_info;
- FOR_EACH_VEC_ELT (SLP_TREE_SCALAR_STMTS (load_node), j, load_info)
- if (SLP_TREE_LOAD_PERMUTATION (load_node)[j] != j)
- {
- loads_permuted = true;
- break;
- }
- }
-
- /* If the loads and stores can be handled with load/store-lane
- instructions record it and move on to the next instance. */
- if (loads_permuted
- && SLP_INSTANCE_KIND (instance) == slp_inst_kind_store
- && vect_store_lanes_supported (vectype, group_size, false)
- != IFN_LAST)
- {
- FOR_EACH_VEC_ELT (SLP_INSTANCE_LOADS (instance), i, load_node)
- if (STMT_VINFO_GROUPED_ACCESS
- (SLP_TREE_REPRESENTATIVE (load_node)))
- {
- stmt_vec_info stmt_vinfo = DR_GROUP_FIRST_ELEMENT
- (SLP_TREE_REPRESENTATIVE (load_node));
- /* Use SLP for strided accesses (or if we can't
- load-lanes). */
- if (STMT_VINFO_STRIDED_P (stmt_vinfo)
- || vect_load_lanes_supported
- (STMT_VINFO_VECTYPE (stmt_vinfo),
- DR_GROUP_SIZE (stmt_vinfo), false) == IFN_LAST)
- break;
- }
-
- can_use_lanes
- = can_use_lanes && i == SLP_INSTANCE_LOADS (instance).length ();
-
- if (can_use_lanes && dump_enabled_p ())
- dump_printf_loc (MSG_NOTE, vect_location,
- "SLP instance %p can use load/store-lanes\n",
- (void *) instance);
- }
- else
- {
- can_use_lanes = false;
- break;
- }
- }
-
- /* If all SLP instances can use load/store-lanes abort SLP and try again
- with SLP disabled. */
- if (can_use_lanes)
- {
- ok = opt_result::failure_at (vect_location,
- "Built SLP cancelled: can use "
- "load/store-lanes\n");
- if (dump_enabled_p ())
- dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
- "Built SLP cancelled: all SLP instances support "
- "load/store-lanes\n");
- goto again;
- }
}
/* Dissolve SLP-only groups. */
--
2.43.0
