Analyze functions for assignment to this properties

src/objects-inl.h

Index: src/objects-inl.h
===================================================================
--- src/objects-inl.h	(revision 2708)
+++ src/objects-inl.h	(working copy)
@@ -91,10 +91,16 @@
   }
 
 
-#define BOOL_ACCESSORS(holder, field, name, offset) \
+#define BOOL_GETTER(holder, field, name, offset)           \
   bool holder::name() {                                    \
     return BooleanBit::get(field(), offset);               \
   }                                                        \
+
+
+#define BOOL_ACCESSORS(holder, field, name, offset)        \
+  bool holder::name() {                                    \
+    return BooleanBit::get(field(), offset);               \
+  }                                                        \
   void holder::set_##name(bool value) {                    \
     set_##field(BooleanBit::set(field(), offset, value));  \
   }
@@ -1937,6 +1943,11 @@
 }
 
 
+int Map::pre_allocated_property_fields() {
+  return READ_BYTE_FIELD(this, kPreAllocatedPropertyFieldsOffset);
+}
+
+
 int HeapObject::SizeFromMap(Map* map) {
   InstanceType instance_type = map->instance_type();
   // Only inline the most frequent cases.
@@ -1969,6 +1980,14 @@
 }
 
 
+void Map::set_pre_allocated_property_fields(int value) {
+  ASSERT(0 <= value && value < 256);
+  WRITE_BYTE_FIELD(this,
+                   kPreAllocatedPropertyFieldsOffset,
+                   static_cast<byte>(value));
+}
+
+
 InstanceType Map::instance_type() {
   return static_cast<InstanceType>(READ_BYTE_FIELD(this, kInstanceTypeOffset));
 }
@@ -2298,6 +2317,8 @@
 ACCESSORS(SharedFunctionInfo, script, Object, kScriptOffset)
 ACCESSORS(SharedFunctionInfo, debug_info, Object, kDebugInfoOffset)
 ACCESSORS(SharedFunctionInfo, inferred_name, String, kInferredNameOffset)
+ACCESSORS(SharedFunctionInfo, this_property_assignments, Object,
+          kThisPropertyAssignmentsOffset)
 
 BOOL_ACCESSORS(FunctionTemplateInfo, flag, hidden_prototype,
                kHiddenPrototypeBit)
@@ -2308,7 +2329,14 @@
                kIsExpressionBit)
 BOOL_ACCESSORS(SharedFunctionInfo, start_position_and_type, is_toplevel,
                kIsTopLevelBit)
+BOOL_GETTER(SharedFunctionInfo, compiler_hints,
+            has_only_this_property_assignments,
+            kHasOnlyThisPropertyAssignments)
+BOOL_GETTER(SharedFunctionInfo, compiler_hints,
+            has_only_simple_this_property_assignments,
+            kHasOnlySimpleThisPropertyAssignments)
 
+
 INT_ACCESSORS(SharedFunctionInfo, length, kLengthOffset)
 INT_ACCESSORS(SharedFunctionInfo, formal_parameter_count,
               kFormalParameterCountOffset)
@@ -2319,6 +2347,10 @@
 INT_ACCESSORS(SharedFunctionInfo, end_position, kEndPositionOffset)
 INT_ACCESSORS(SharedFunctionInfo, function_token_position,
               kFunctionTokenPositionOffset)
+INT_ACCESSORS(SharedFunctionInfo, compiler_hints,
+              kCompilerHintsOffset)
+INT_ACCESSORS(SharedFunctionInfo, this_property_assignments_count,
+              kThisPropertyAssignmentsCountOffset)
 
 
 void SharedFunctionInfo::DontAdaptArguments() {