Optimize non-mutation Map and Set operations for String keys

src/hydrogen.h

 // Copyright 2012 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_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 2399 matching lines @@
 
   HValue* BuildAllocateExternalElements(
       ExternalArrayType array_type,
       bool is_zero_byte_offset,
       HValue* buffer, HValue* byte_offset, HValue* length);
   HValue* BuildAllocateFixedTypedArray(
       ExternalArrayType array_type, size_t element_size,
       ElementsKind fixed_elements_kind,
       HValue* byte_length, HValue* length);
 
+  template <typename CollectionType>
+  HValue* BuildOrderedHashTableFindEntry(HValue* table, HValue* key,
+                                         HValue* hash);
+
+  template <typename CollectionType>
+  void BuildJSCollectionHas(CallRuntime* call,
+                            const Runtime::Function* c_function);
+
+  HValue* BuildStringHashLoadIfIsStringAndHashComputed(
+      HValue* object, HIfContinuation* continuation);
+
   Handle<JSFunction> array_function() {
     return handle(isolate()->native_context()->array_function());
   }
 
   bool IsCallArrayInlineable(int argument_count, Handle<AllocationSite> site);
   void BuildInlinedCallArray(Expression* expression, int argument_count,
                              Handle<AllocationSite> site);
 
   class PropertyAccessInfo {
    public:
@@ skipping 485 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_