add costing to SLP vectorized PHIs

I forgot to cost vectorized PHIs.  Scalar PHIs are just costed
as scalar_stmt so the following costs vector PHIs as vector_stmt.

2020-11-04  Richard Biener  <rguenther@suse.de>

	* tree-vectorizer.h (vectorizable_phi): Adjust prototype.
	* tree-vect-stmts.c (vect_transform_stmt): Adjust.
	(vect_analyze_stmt): Pass cost_vec to vectorizable_phi.
	* tree-vect-loop.c (vectorizable_phi): Do costing.

diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index 6cb2286..5e7188a 100644 (file)
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -7548,7 +7548,7 @@ vectorizable_lc_phi (loop_vec_info loop_vinfo,
 bool
 vectorizable_phi (vec_info *,
                  stmt_vec_info stmt_info, gimple **vec_stmt,
-                 slp_tree slp_node)
+                 slp_tree slp_node, stmt_vector_for_cost *cost_vec)
 {
   if (!is_a <gphi *> (stmt_info->stmt) || !slp_node)
     return false;
@@ -7577,6 +7577,8 @@ vectorizable_phi (vec_info *,
                               "incompatible vector types for invariants\n");
            return false;
          }
+      record_stmt_cost (cost_vec, SLP_TREE_NUMBER_OF_VEC_STMTS (slp_node),
+                       vector_stmt, stmt_info, vectype, 0, vect_body);
       STMT_VINFO_TYPE (stmt_info) = phi_info_type;
       return true;
     }

diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index 9cf85a0..2c7a8a7 100644 (file)
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -10727,7 +10727,7 @@ vect_analyze_stmt (vec_info *vinfo,
                                         NULL, NULL, node, cost_vec)
              || vectorizable_comparison (vinfo, stmt_info, NULL, NULL, node,
                                          cost_vec)
-             || vectorizable_phi (vinfo, stmt_info, NULL, node));
+             || vectorizable_phi (vinfo, stmt_info, NULL, node, cost_vec));
     }
 
   if (!ok)
@@ -10868,7 +10868,7 @@ vect_transform_stmt (vec_info *vinfo,
       break;
 
     case phi_info_type:
-      done = vectorizable_phi (vinfo, stmt_info, &vec_stmt, slp_node);
+      done = vectorizable_phi (vinfo, stmt_info, &vec_stmt, slp_node, NULL);
       gcc_assert (done);
       break;
 

diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h
index fbf5291..0252d79 100644 (file)
--- a/gcc/tree-vectorizer.h
+++ b/gcc/tree-vectorizer.h
@@ -1940,7 +1940,8 @@ extern bool vect_transform_cycle_phi (loop_vec_info, stmt_vec_info,
                                      slp_tree, slp_instance);
 extern bool vectorizable_lc_phi (loop_vec_info, stmt_vec_info,
                                 gimple **, slp_tree);
-extern bool vectorizable_phi (vec_info *, stmt_vec_info, gimple **, slp_tree);
+extern bool vectorizable_phi (vec_info *, stmt_vec_info, gimple **, slp_tree,
+                             stmt_vector_for_cost *);
 extern bool vect_worthwhile_without_simd_p (vec_info *, tree_code);
 extern int vect_get_known_peeling_cost (loop_vec_info, int, int *,
                                        stmt_vector_for_cost *,