[turbofan] Add length operand to LoadElement and StoreElement.

test/cctest/compiler/test-node.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <functional>
 
 #include "src/v8.h"
 
 #include "graph-tester.h"
 #include "src/compiler/generic-node-inl.h"
@@ skipping 320 matching lines @@
   CHECK(current != uses.end());
   CHECK(*current == n5);
   ++current;
   CHECK(current != uses.end());
   CHECK(*current == n3);
   ++current;
   CHECK(current == uses.end());
 }
 
 
+TEST(RemoveInput) {
+  GraphTester graph;
+
+  Node* n0 = graph.NewNode(&dummy_operator);
+  Node* n1 = graph.NewNode(&dummy_operator, n0);
+  Node* n2 = graph.NewNode(&dummy_operator, n0, n1);
+
+  n1->RemoveInput(0);
+  CHECK_EQ(0, n1->InputCount());
+  CHECK_EQ(1, n0->UseCount());
+
+  n2->RemoveInput(0);
+  CHECK_EQ(1, n2->InputCount());
+  CHECK_EQ(0, n0->UseCount());
+  CHECK_EQ(1, n1->UseCount());
+
+  n2->RemoveInput(0);
+  CHECK_EQ(0, n2->InputCount());
+}
+
+
 TEST(AppendInputsAndIterator) {
   GraphTester graph;
 
   Node* n0 = graph.NewNode(&dummy_operator);
   Node* n1 = graph.NewNode(&dummy_operator, n0);
   Node* n2 = graph.NewNode(&dummy_operator, n0, n1);
 
   Node::Inputs inputs(n2->inputs());
   Node::Inputs::iterator current = inputs.begin();
   CHECK(current != inputs.end());
@@ skipping 460 matching lines @@
     n1->ReplaceInput(0, n1);  // self-reference.
 
     CHECK_EQ(0, n0->UseCount());
     CHECK_EQ(1, n1->UseCount());
     n1->RemoveAllInputs();
     CHECK_EQ(1, n1->InputCount());
     CHECK_EQ(0, n1->UseCount());
     CHECK_EQ(NULL, n1->InputAt(0));
   }
 }