Create and cache method extraction stub in the ICData.

runtime/vm/parser.cc

Index: runtime/vm/parser.cc
diff --git a/runtime/vm/parser.cc b/runtime/vm/parser.cc
index aacdda0b953f57214f7e030b9cbe1fc9a98f3a52..58567f1325fb24c3f78977fc951bf5e250e9f20b 100644
--- a/runtime/vm/parser.cc
+++ b/runtime/vm/parser.cc
@@ -756,6 +756,9 @@ void Parser::ParseFunction(ParsedFunction* parsed_function) {
     case RawFunction::kConstImplicitGetter:
       node_sequence = parser.ParseStaticConstGetter(func);
       break;
+    case RawFunction::kMethodExtractor:
+      node_sequence = parser.ParseMethodExtractor(func);
+      break;
     default:
       UNREACHABLE();
   }
@@ -984,6 +987,37 @@ SequenceNode* Parser::ParseInstanceSetter(const Function& func) {
 }
 
 
+SequenceNode* Parser::ParseMethodExtractor(const Function& func) {
+  TRACE_PARSER("ParseMethodExtractor");
+  ParamList params;
+
+  // func.token_pos() points to the name of the field.

[Ivan Posva, 2013/01/17 08:03:20]

I don't think this comment is correct. The token_pos does not point to a field.

[Vyacheslav Egorov (Google), 2013/01/17 12:46:38]

Indeed it is not. token_pos is 0 actually.

+  intptr_t ident_pos = func.token_pos();
+  ASSERT(current_class().raw() == func.Owner());
+  params.AddReceiver(ReceiverType(ident_pos));
+  ASSERT(func.num_fixed_parameters() == 1);  // receiver.
+  ASSERT(!func.HasOptionalParameters());
+
+  // Build local scope for function and populate with the formal parameters.
+  OpenFunctionBlock(func);
+  AddFormalParamsToScope(&params, current_block_->scope);
+
+  // Receiver is local 0.
+  LocalVariable* receiver = current_block_->scope->VariableAt(0);
+  LoadLocalNode* load_receiver = new LoadLocalNode(ident_pos, receiver);
+
+  ClosureNode* closure = new ClosureNode(
+      ident_pos,
+      Function::ZoneHandle(func.extracted_method_closure()),
+      load_receiver,
+      NULL);
+
+  ReturnNode* return_node = new ReturnNode(ident_pos, closure);
+  current_block_->statements->Add(return_node);
+  return CloseBlock();
+}
+
+
 void Parser::SkipBlock() {
   ASSERT(CurrentToken() == Token::kLBRACE);
   GrowableArray<Token::Kind> token_stack(8);