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

src/compiler/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 "src/compiler/node.h"
 
 #include <algorithm>
 
 namespace v8 {
 namespace internal {
@@ skipping 82 matching lines @@
   for (Edge edge : input_edges()) edge.UpdateTo(nullptr);
 }
 
 
 void Node::TrimInputCount(int new_input_count) {
   DCHECK_LE(new_input_count, input_count());
   if (new_input_count == input_count()) return;  // Nothing to do.
   for (int index = new_input_count; index < input_count(); ++index) {
     ReplaceInput(index, nullptr);
   }
-  if (!has_appendable_inputs()) {
+  if (has_appendable_inputs()) {
+    inputs_.appendable_->resize(new_input_count);
+  } else {
     set_reserved_input_count(std::min<int>(
         ReservedInputCountField::kMax,
         reserved_input_count() + (input_count() - new_input_count)));
   }
   set_input_count(new_input_count);
 }
 
 
 int Node::UseCount() const {
   int use_count = 0;
@@ skipping 154 matching lines @@
   ++(*this);
   return result;
 }
 
 
 bool Node::Uses::empty() const { return begin() == end(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8