From: alahay01 <alahay01@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 13 Jun 2016 11:07:35 +0000 (+0000)
Subject: 2016-06-13  Alan Hayward  <alan.hayward@arm.com>
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=29b68e500feaed8e21850154ae6122e723842b4d;p=thirdparty%2Fgcc.git

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



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@237375 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 88506a587ebf..e8ad4c85a2db 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+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_.
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index 1231b95f6a71..91d0608e59cd 100644
--- a/gcc/tree-vect-loop.c
+++ b/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;
 }