Precompilation: drop unused types and type arguments and empty classes and libraries.

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 3468 matching lines @@
 #if defined(DEBUG)
   // Verify that the same class is not added twice.
   for (intptr_t i = 0; i < direct_subclasses.Length(); i++) {
     ASSERT(direct_subclasses.At(i) != subclass.raw());
   }
 #endif
   direct_subclasses.Add(subclass, Heap::kOld);
 }
 
 
+void Class::ClearDirectSubclasses() const {
+  StorePointer(&raw_ptr()->direct_subclasses_, GrowableObjectArray::null());
+}
+
+
 RawArray* Class::constants() const {
   return raw_ptr()->constants_;
 }
 
 void Class::set_constants(const Array& value) const {
   ASSERT(!value.IsNull());
   StorePointer(&raw_ptr()->constants_, value.raw());
 }
 
 
@@ skipping 6188 matching lines @@
       imported = prefix.GetLibrary(i);
       if (imported.IsCoreLibrary()) {
         return true;
       }
     }
   }
   return false;
 }
 
 
+void Library::DropDependencies() const {
+  StorePointer(&raw_ptr()->imports_, Array::null());
+  StorePointer(&raw_ptr()->exports_, Array::null());
+}
+
+
 void Library::AddImport(const Namespace& ns) const {
   Array& imports = Array::Handle(this->imports());
   intptr_t capacity = imports.Length();
   if (num_imports() == capacity) {
     capacity = capacity + kImportsCapacityIncrement;
     imports = Array::Grow(imports, capacity);
     StorePointer(&raw_ptr()->imports_, imports.raw());
   }
   intptr_t index = num_imports();
   imports.SetAt(index, ns);
@@ skipping 11725 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart