[turbofan] Add support for storing to double fields.

src/compiler/node-properties.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_PROPERTIES_H_
 #define V8_COMPILER_NODE_PROPERTIES_H_
 
 #include "src/compiler/node.h"
 #include "src/types.h"
 
@@ skipping 103 matching lines @@
   static void CollectControlProjections(Node* node, Node** proj, size_t count);
 
   // ---------------------------------------------------------------------------
   // Type.
 
   static bool IsTyped(Node* node) { return node->type() != nullptr; }
   static Type* GetType(Node* node) {
     DCHECK(IsTyped(node));
     return node->type();
   }
+  static Type* GetTypeOrAny(Node* node);
   static void SetType(Node* node, Type* type) {
     DCHECK_NOT_NULL(type);
     node->set_type(type);
   }
   static void RemoveType(Node* node) { node->set_type(nullptr); }
   static bool AllValueInputsAreTyped(Node* node);
 
  private:
   static inline bool IsInputRange(Edge edge, int first, int count);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_NODE_PROPERTIES_H_