[Isolates] Merge crankshaft (r5922 from bleeding_edge).

src/x64/codegen-x64.h

Index: src/x64/codegen-x64.h
diff --git a/src/x64/codegen-x64.h b/src/x64/codegen-x64.h
index 466d69821ff5fcc587308ff2e701adedf4eeec14..2f5dbdc7e36099fb3c9e0196b361bbe9088951d2 100644
--- a/src/x64/codegen-x64.h
+++ b/src/x64/codegen-x64.h
@@ -308,6 +308,9 @@ class CodeGenerator: public AstVisitor {
                                        Code::Flags flags,
                                        CompilationInfo* info);
 
+  // Print the code after compiling it.
+  static void PrintCode(Handle<Code> code, CompilationInfo* info);
+
 #ifdef ENABLE_LOGGING_AND_PROFILING
   static bool ShouldGenerateLog(Expression* type);
 #endif
@@ -370,8 +373,9 @@ class CodeGenerator: public AstVisitor {
   // Node visitors.
   void VisitStatements(ZoneList<Statement*>* statements);
 
-#define DEF_VISIT(type) \
-  void Visit##type(type* node);
+  virtual void VisitSlot(Slot* node);
+#define DEF_VISIT(type)                         \
+  virtual void Visit##type(type* node);
   AST_NODE_LIST(DEF_VISIT)
 #undef DEF_VISIT