Start porting fast typechecks to x64.

runtime/vm/parser.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/parser.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/compiler_stats.h"
@@ skipping 218 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(TryBlocks);
 };
 
 
 void Parser::TryBlocks::AddNodeForFinallyInlining(AstNode* node) {
   inlined_finally_nodes_.Add(node);
 }
 
 
+// For parsing a compilation unit.
 Parser::Parser(const Script& script,
                const Library& library)
     : script_(script),
       tokens_(TokenStream::Handle(script.tokens())),
       token_index_(0),
       current_block_(NULL),
       is_top_level_(false),
       current_member_(NULL),
       allow_function_literals_(true),
       current_function_(Function::Handle()),
       current_class_(Class::Handle()),
       library_(library),
       try_blocks_list_(NULL),
       expression_temp_(NULL) {
   ASSERT(!tokens_.IsNull());
   ASSERT(!library.IsNull());
   SetPosition(0);
 }
 
 
+// For parsing a function.
 Parser::Parser(const Script& script,
                const Function& function,
                intptr_t token_index)
     : script_(script),
       tokens_(TokenStream::Handle(script.tokens())),
       token_index_(0),
       current_block_(NULL),
       is_top_level_(false),
       current_member_(NULL),
       allow_function_literals_(true),
       current_function_(function),
       current_class_(Class::Handle(current_function_.owner())),
       library_(Library::Handle(current_class_.library())),
       try_blocks_list_(NULL),
       expression_temp_(NULL)  {
   ASSERT(!tokens_.IsNull());
   ASSERT(!function.IsNull());
   SetPosition(token_index);
+  if (FLAG_enable_type_checks) {
+    EnsureExpressionTemp();
+  }
 }
 
 
 bool Parser::SetAllowFunctionLiterals(bool value) {
   bool current_value = allow_function_literals_;
   allow_function_literals_ = value;
   return current_value;
 }
 
 
@@ skipping 8176 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart