re PR tree-optimization/71416 (ICE at -O3 in 32-bit and 64-bit modes on…

re PR tree-optimization/71416 (ICE at -O3 in 32-bit and 64-bit modes on x86_64-linux-gnu (vectorizable_live_operation))

2016-06-13  Alan Hayward  <alan.hayward@arm.com>

gcc/
	PR tree-optimization/71416
	* tree-vect-loop.c (vectorizable_live_operation): Let worklist have
	multiple entries

From-SVN: r237375

gcc/ChangeLog

+2016-06-13  Alan Hayward  <alan.hayward@arm.com>
+
+	PR tree-optimization/71416
+	* tree-vect-loop.c (vectorizable_live_operation): Let worklist have
+	multiple entries
+
 2016-06-13  Martin Liska  <mliska@suse.cz>
 
 	* predict.c (enum predictor_reason): Prefix enum with REASON_.

gcc/tree-vect-loop.c

@@ -6351,7 +6351,7 @@ vectorizable_live_operation (gimple *stmt,
   FOR_EACH_IMM_USE_STMT (use_stmt, imm_iter, lhs)
     if (!flow_bb_inside_loop_p (loop, gimple_bb (use_stmt)))
 	worklist.safe_push (use_stmt);
-  gcc_assert (worklist.length () == 1);
+  gcc_assert (worklist.length () >= 1);
 
   bitsize = TYPE_SIZE (TREE_TYPE (vectype));
   vec_bitsize = TYPE_SIZE (vectype);
@@ -6409,9 +6409,12 @@ vectorizable_live_operation (gimple *stmt,
 
   /* Replace all uses of the USE_STMT in the worklist with the newly inserted
      statement.  */
-  use_stmt = worklist.pop ();
-  replace_uses_by (gimple_phi_result (use_stmt), new_tree);
-  update_stmt (use_stmt);
+  while (!worklist.is_empty ())
+    {
+      use_stmt = worklist.pop ();
+      replace_uses_by (gimple_phi_result (use_stmt), new_tree);
+      update_stmt (use_stmt);
+    }
 
   return true;
 }