return false;
}
+
+/* Find the first load in the loop that belongs to INSTANCE.
+ When loads are in several SLP nodes, there can be a case in which the first
+ load does not appear in the first SLP node to be transformed, causing
+ incorrect order of statements. Since we generate all the loads together,
+ they must be inserted before the first load of the SLP instance and not
+ before the first load of the first node of the instance. */
+static gimple
+vect_find_first_load_in_slp_instance (slp_instance instance)
+{
+ int i, j;
+ slp_tree load_node;
+ gimple first_load = NULL, load;
+
+ for (i = 0;
+ VEC_iterate (slp_tree, SLP_INSTANCE_LOADS (instance), i, load_node);
+ i++)
+ for (j = 0;
+ VEC_iterate (gimple, SLP_TREE_SCALAR_STMTS (load_node), j, load);
+ j++)
+ first_load = get_earlier_stmt (load, first_load);
+
+ return first_load;
+}
+
+
/* Analyze an SLP instance starting from a group of strided stores. Call
vect_build_slp_tree to build a tree of packed stmts if possible.
Return FALSE if it's impossible to SLP any stmt in the loop. */
SLP_INSTANCE_OUTSIDE_OF_LOOP_COST (new_instance) = outside_cost;
SLP_INSTANCE_INSIDE_OF_LOOP_COST (new_instance) = inside_cost;
SLP_INSTANCE_LOADS (new_instance) = loads;
+ SLP_INSTANCE_FIRST_LOAD_STMT (new_instance) = NULL;
SLP_INSTANCE_LOAD_PERMUTATION (new_instance) = load_permutation;
if (VEC_length (slp_tree, loads))
{
vect_free_slp_instance (new_instance);
return false;
}
+
+ SLP_INSTANCE_FIRST_LOAD_STMT (new_instance)
+ = vect_find_first_load_in_slp_instance (new_instance);
}
else
VEC_free (int, heap, SLP_INSTANCE_LOAD_PERMUTATION (new_instance));