VM: Cache instructions entry point in RawFunction/RawCode.

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 5182 matching lines @@
 }
 
 
 bool Function::HasBreakpoint() const {
   return Isolate::Current()->debugger()->HasBreakpoint(*this);
 }
 
 
 void Function::SetInstructions(const Code& value) const {
   StorePointer(&raw_ptr()->instructions_, value.instructions());
+  StoreNonPointer(&raw_ptr()->entry_point_, value.EntryPoint());
 }
 
 void Function::AttachCode(const Code& value) const {
   SetInstructions(value);
   ASSERT(Function::Handle(value.function()).IsNull() ||
     (value.function() == this->raw()));
   value.set_owner(*this);
 }
 
 
 bool Function::HasCode() const {
   ASSERT(raw_ptr()->instructions_ != Instructions::null());
   return raw_ptr()->instructions_ !=
       StubCode::LazyCompile_entry()->code()->ptr()->instructions_;
 }
 
 
 void Function::ClearCode() const {
   ASSERT(ic_data_array() == Array::null());
   StorePointer(&raw_ptr()->unoptimized_code_, Code::null());
-  StorePointer(&raw_ptr()->instructions_,
-      Code::Handle(StubCode::LazyCompile_entry()->code()).instructions());
+  SetInstructions(Code::Handle(StubCode::LazyCompile_entry()->code()));
 }
 
 
 void Function::SwitchToUnoptimizedCode() const {
   ASSERT(HasOptimizedCode());
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();
   Zone* zone = thread->zone();
   const Code& current_code = Code::Handle(zone, CurrentCode());
 
@@ skipping 16152 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart