[turbofan] Fix Node::TrimInputCount() followed by Node::AppendInput() bug.

src/compiler/node.h

 // 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.
 
 #ifndef V8_COMPILER_NODE_H_
 #define V8_COMPILER_NODE_H_
 
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 #include "src/types-inl.h"
@@ skipping 368 matching lines @@
 Node::Inputs::const_iterator Node::Inputs::begin() const {
   return const_iterator(this->node_, 0);
 }
 
 
 Node::Inputs::const_iterator Node::Inputs::end() const {
   return const_iterator(this->node_, this->node_->InputCount());
 }
 
 
-// A forward iterator to visit the uses edges of a node. The edges are returned
-// in
-// the order in which they were added as inputs.
+// A forward iterator to visit the uses edges of a node.
 class Node::UseEdges::iterator final {
  public:
   iterator(const iterator& other)
       : current_(other.current_), next_(other.next_) {}
 
   Edge operator*() const {
     return Edge(current_->from->GetInputRecordPtr(current_->input_index));
   }
 
   bool operator==(const iterator& other) const {
@@ skipping 24 matching lines @@
 Node::UseEdges::iterator Node::UseEdges::begin() const {
   return Node::UseEdges::iterator(this->node_);
 }
 
 
 Node::UseEdges::iterator Node::UseEdges::end() const {
   return Node::UseEdges::iterator();
 }
 
 
-// A forward iterator to visit the uses of a node. The uses are returned in
-// the order in which they were added as inputs.
+// A forward iterator to visit the uses of a node.
 class Node::Uses::const_iterator final {
  public:
   typedef std::forward_iterator_tag iterator_category;
   typedef int difference_type;
   typedef Node* value_type;
   typedef Node** pointer;
   typedef Node*& reference;
 
   const_iterator(const const_iterator& other) : current_(other.current_) {}
 
@@ skipping 31 matching lines @@
 
 void Node::ReplaceInput(int index, Node* new_to) {
   GetInputRecordPtr(index)->Update(new_to);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_NODE_H_