Make CTX allocatable by the register allocator.

runtime/vm/unit_test.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/unit_test.h"
 
 #include <stdio.h>
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
@@ skipping 199 matching lines @@
   function_.set_result_type(Type::Handle(Type::DynamicType()));
   const Array& functions = Array::Handle(Array::New(1));
   functions.SetAt(0, function_);
   cls.SetFunctions(functions);
   Library& lib = Library::Handle(Library::CoreLibrary());
   lib.AddClass(cls);
 }
 
 
 void CodeGenTest::Compile() {
+  if (function_.HasCode()) return;
   ParsedFunction* parsed_function =
       new ParsedFunction(Isolate::Current(), function_);
   parsed_function->SetNodeSequence(node_sequence_);
   parsed_function->set_instantiator(NULL);
   parsed_function->set_default_parameter_values(default_parameter_values_);
+  node_sequence_->scope()->AddVariable(
+      parsed_function->current_context_var());
   parsed_function->EnsureExpressionTemp();
   node_sequence_->scope()->AddVariable(parsed_function->expression_temp_var());
   parsed_function->AllocateVariables();
   const Error& error =
       Error::Handle(Compiler::CompileParsedFunction(parsed_function));
   EXPECT(error.IsNull());
 }
 
 
-LocalVariable* CodeGenTest::CreateTempConstVariable(const char* name_part) {
-  char name[64];
-  OS::SNPrint(name, 64, ":%s", name_part);
-  LocalVariable* temp =
-      new LocalVariable(0,
-                        String::ZoneHandle(Symbols::New(name)),
-                        Type::ZoneHandle(Type::DynamicType()));
-  temp->set_is_final();
-  node_sequence_->scope()->AddVariable(temp);
-  return temp;
-}
-
-
 bool CompilerTest::TestCompileScript(const Library& library,
                                      const Script& script) {
   Isolate* isolate = Isolate::Current();
   ASSERT(isolate != NULL);
   const Error& error = Error::Handle(Compiler::Compile(library, script));
   if (!error.IsNull()) {
     OS::Print("Error compiling test script:\n%s\n",
     error.ToErrorCString());
   }
   return error.IsNull();
 }
 
 
 bool CompilerTest::TestCompileFunction(const Function& function) {
   Isolate* isolate = Isolate::Current();
   ASSERT(isolate != NULL);
   ASSERT(ClassFinalizer::AllClassesFinalized());
   const Error& error = Error::Handle(Compiler::CompileFunction(isolate,
                                                                function));
   return error.IsNull();
 }
 
 
 }  // namespace dart