Remove unused return value from vect_transform_stmt

Without SLP we used to elide stores immediately, but now this is
done as postprocessing so the return value is no longer needed.

	* tree-vectorizer.h (vect_transform_stmt): Return void.
	* tree-vect-stmts.cc (vect_transform_stmt): Likewise.

gcc/tree-vect-stmts.cc

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 76e24b2..700b3e7 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -13384,12 +13384,11 @@
 
    Create a vectorized stmt to replace STMT_INFO, and insert it at GSI.  */
 
-bool
+void
 vect_transform_stmt (vec_info *vinfo,
 		     stmt_vec_info stmt_info, gimple_stmt_iterator *gsi,
 		     slp_tree slp_node, slp_instance slp_node_instance)
 {
-  bool is_store = false;
   bool done;
 
   gcc_assert (slp_node);
@@ -13435,7 +13434,6 @@
     case store_vec_info_type:
       done = vectorizable_store (vinfo, stmt_info, gsi, slp_node, NULL);
       gcc_assert (done);
-      is_store = true;
       break;
 
     case condition_vec_info_type:
@@ -13523,8 +13521,6 @@
 	  gcc_assert (done);
 	}
     }
-
-  return is_store;
 }
 
 

gcc/tree-vectorizer.h

diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h
index 2e47569..d4eb20f 100644
--- a/gcc/tree-vectorizer.h
+++ b/gcc/tree-vectorizer.h
@@ -2596,7 +2596,7 @@
 extern tree vect_init_vector (vec_info *, stmt_vec_info, tree, tree,
                               gimple_stmt_iterator *);
 extern tree vect_get_slp_vect_def (slp_tree, unsigned);
-extern bool vect_transform_stmt (vec_info *, stmt_vec_info,
+extern void vect_transform_stmt (vec_info *, stmt_vec_info,
 				 gimple_stmt_iterator *,
 				 slp_tree, slp_instance);
 extern void vect_remove_stores (vec_info *, stmt_vec_info);