Generate specialized constructor code for constructing simple objects

src/objects.cc

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4804 matching lines @@
                                      kHasOnlyThisPropertyAssignments,
                                      only_this_property_assignments));
   set_compiler_hints(BooleanBit::set(compiler_hints(),
                                      kHasOnlySimpleThisPropertyAssignments,
                                      only_simple_this_property_assignments));
   set_this_property_assignments(assignments);
   set_this_property_assignments_count(assignments->length() / 3);
 }
 
 
+void SharedFunctionInfo::ClearThisPropertyAssignmentsInfo() {
+  set_compiler_hints(BooleanBit::set(compiler_hints(),
+                                     kHasOnlyThisPropertyAssignments,
+                                     false));
+  set_compiler_hints(BooleanBit::set(compiler_hints(),
+                                     kHasOnlySimpleThisPropertyAssignments,
+                                     false));
+  set_this_property_assignments(Heap::undefined_value());
+  set_this_property_assignments_count(0);
+}
+
+
 String* SharedFunctionInfo::GetThisPropertyAssignmentName(int index) {
   Object* obj = this_property_assignments();
   ASSERT(obj->IsFixedArray());
   ASSERT(index < this_property_assignments_count());
   obj = FixedArray::cast(obj)->get(index * 3);
   ASSERT(obj->IsString());
   return String::cast(obj);
 }
 
 
+bool SharedFunctionInfo::IsThisPropertyAssignmentArgument(int index) {
+  Object* obj = this_property_assignments();
+  ASSERT(obj->IsFixedArray());
+  ASSERT(index < this_property_assignments_count());
+  obj = FixedArray::cast(obj)->get(index * 3 + 1);
+  return Smi::cast(obj)->value() != -1;
+}
+
+
+int SharedFunctionInfo::GetThisPropertyAssignmentArgument(int index) {
+  ASSERT(IsThisPropertyAssignmentArgument(index));
+  Object* obj =
+      FixedArray::cast(this_property_assignments())->get(index * 3 + 1);
+  return Smi::cast(obj)->value();
+}
+
+
+Object* SharedFunctionInfo::GetThisPropertyAssignmentConstant(int index) {
+  ASSERT(!IsThisPropertyAssignmentArgument(index));
+  Object* obj =
+      FixedArray::cast(this_property_assignments())->get(index * 3 + 2);
+  return obj;
+}
+
+
+
 // Support function for printing the source code to a StringStream
 // without any allocation in the heap.
 void SharedFunctionInfo::SourceCodePrint(StringStream* accumulator,
                                          int max_length) {
   // For some native functions there is no source.
   if (script()->IsUndefined() ||
       Script::cast(script())->source()->IsUndefined()) {
     accumulator->Add("<No Source>");
     return;
   }
@@ skipping 3113 matching lines @@
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 #endif
 
 
 } }  // namespace v8::internal