tree-vectorizer.h (stmt_vec_info_type::cycle_phi_info_type): New.

2019-10-02  Richard Biener  <rguenther@suse.de>

	* tree-vectorizer.h (stmt_vec_info_type::cycle_phi_info_type):
	New.
	(vect_transform_cycle_phi): Declare.
	* tree-vect-stmts.c (vect_transform_stmt): Call
	vect_transform_cycle_phi.
	* tree-vect-loop.c (vectorizable_reduction): Split out
	PHI transformation stage to ...
	(vect_transform_cycle_phi): ... here.

From-SVN: r276441

gcc/ChangeLog

+2019-10-02  Richard Biener  <rguenther@suse.de>
+
+	* tree-vectorizer.h (stmt_vec_info_type::cycle_phi_info_type):
+	New.
+	(vect_transform_cycle_phi): Declare.
+	* tree-vect-stmts.c (vect_transform_stmt): Call
+	vect_transform_cycle_phi.
+	* tree-vect-loop.c (vectorizable_reduction): Split out
+	PHI transformation stage to ...
+	(vect_transform_cycle_phi): ... here.
+
 2019-10-02  Richard Sandiford  <richard.sandiford@arm.com>
 
 	PR middle-end/91957

gcc/tree-vect-stmts.c

@@ -10824,6 +10824,12 @@ vect_transform_stmt (stmt_vec_info stmt_info, gimple_stmt_iterator *gsi,
       gcc_assert (done);
       break;
 
+    case cycle_phi_info_type:
+      done = vect_transform_cycle_phi (stmt_info, &vec_stmt, slp_node,
+				       slp_node_instance);
+      gcc_assert (done);
+      break;
+
     case lc_phi_info_type:
       done = vectorizable_lc_phi (stmt_info, &vec_stmt, slp_node);
       gcc_assert (done);

gcc/tree-vectorizer.h

@@ -694,6 +694,7 @@ enum stmt_vec_info_type {
   type_promotion_vec_info_type,
   type_demotion_vec_info_type,
   type_conversion_vec_info_type,
+  cycle_phi_info_type,
   lc_phi_info_type,
   loop_exit_ctrl_vec_info_type
 };
@@ -1658,6 +1659,8 @@ extern bool vectorizable_reduction (stmt_vec_info, gimple_stmt_iterator *,
 extern bool vectorizable_induction (stmt_vec_info, gimple_stmt_iterator *,
 				    stmt_vec_info *, slp_tree,
 				    stmt_vector_for_cost *);
+extern bool vect_transform_cycle_phi (stmt_vec_info, stmt_vec_info *,
+				      slp_tree, slp_instance);
 extern bool vectorizable_lc_phi (stmt_vec_info, stmt_vec_info *, slp_tree);
 extern bool vect_worthwhile_without_simd_p (vec_info *, tree_code);
 extern int vect_get_known_peeling_cost (loop_vec_info, int, int *,