Implement context cloning in new compiler.

runtime/vm/flow_graph_builder.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/flow_graph_builder.h"
 
 #include "vm/ast_printer.h"
 #include "vm/dart_entry.h"
 #include "vm/flags.h"
 #include "vm/intermediate_language.h"
@@ skipping 1249 matching lines @@
   arguments->Add(for_closure.value());
   TranslateArgumentList(*node->arguments(), temp_index() + 2, arguments);
   // First operand is the saved context, consumed by the call.
   ClosureCallComp* call =
       new ClosureCallComp(node, new TempVal(temp_index()), arguments);
   ReturnComputation(call);
 }
 
 
 void EffectGraphVisitor::VisitCloneContextNode(CloneContextNode* node) {
-  Bailout("EffectGraphVisitor::VisitCloneContextNode");
+  AddInstruction(new BindInstr(temp_index(), new CurrentContextComp()));
+  TempVal* ctx = new TempVal(temp_index());
+  AddInstruction(new BindInstr(temp_index(),
+                 new CloneContextComp(node->id(), node->token_index(), ctx)));
+  TempVal* cloned_ctx = new TempVal(temp_index());
+  ReturnComputation(new StoreContextComp(cloned_ctx));
 }
 
 
 void EffectGraphVisitor::VisitConstructorCallNode(ConstructorCallNode* node) {
   if (node->constructor().IsFactory()) {
     ZoneGrowableArray<Value*>* factory_arguments =
         new ZoneGrowableArray<Value*>();
     factory_arguments->Add(BuildFactoryTypeArguments(node, temp_index()));
     ASSERT(factory_arguments->length() == 1);
     TranslateArgumentList(*node->arguments(),
@@ skipping 842 matching lines @@
 }
 
 
 void FlowGraphPrinter::VisitChainContext(ChainContextComp* comp) {
   OS::Print("ChainContext(");
   comp->context_value()->Accept(this);
   OS::Print(")");
 }
 
 
+void FlowGraphPrinter::VisitCloneContext(CloneContextComp* comp) {
+  OS::Print("CloneContext(");
+  comp->context_value()->Accept(this);
+  OS::Print(")");
+}
+
+
 void FlowGraphPrinter::VisitStoreContext(StoreContextComp* comp) {
   OS::Print("StoreContext(");
   comp->value()->Accept(this);
   OS::Print(")");
 }
 
 
 void FlowGraphPrinter::VisitJoinEntry(JoinEntryInstr* instr) {
   OS::Print("%2d: [join]", reverse_index(instr->postorder_number()));
 }
@@ skipping 184 matching lines @@
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len));
   OS::SNPrint(chars, len, kFormat, function_name, reason);
   const Error& error = Error::Handle(
       LanguageError::New(String::Handle(String::New(chars))));
   Isolate::Current()->long_jump_base()->Jump(1, error);
 }
 
 
 }  // namespace dart