[modules] Give Module an internal [hash] field

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 552e96f18fab6259c0c2661098c552c44b7fdca5..c57613587a2e703699fa78d49a5fdcee5a2ff304 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7903,15 +7903,15 @@ class Module : public Struct {
   // Embedder-specified data
   DECL_ACCESSORS(embedder_data, Object)
 
+  // Hash code for this object (a random non-zero Smi).

[neis, 2016/10/07 09:21:50]

s/code // to avoid confusion in the following comments

[adamk, 2016/10/07 17:37:35]

Done.

+  DECL_INT_ACCESSORS(hash)
+
   // Get the SharedFunctionInfo associated with the code.
   inline SharedFunctionInfo* shared() const;
 
   // Get the ModuleInfo associated with the code.
   inline ModuleInfo* info() const;
 
-  // Compute a hash for this object.
-  inline uint32_t Hash() const;
-
   // Implementation of spec operation ModuleDeclarationInstantiation.
   // Returns false if an exception occurred during instantiation, true
   // otherwise.
@@ -7935,7 +7935,8 @@ class Module : public Struct {
   static const int kRequestedModulesOffset = kExportsOffset + kPointerSize;
   static const int kFlagsOffset = kRequestedModulesOffset + kPointerSize;
   static const int kEmbedderDataOffset = kFlagsOffset + kPointerSize;
-  static const int kSize = kEmbedderDataOffset + kPointerSize;
+  static const int kHashOffset = kEmbedderDataOffset + kPointerSize;
+  static const int kSize = kHashOffset + kPointerSize;
 
  private:
   enum { kEvaluatedBit };