Cleanup the AST code by removing unused parts and get rid of the...

src/rewriter.cc

Index: src/rewriter.cc
===================================================================
--- src/rewriter.cc	(revision 5322)
+++ src/rewriter.cc	(working copy)
@@ -106,7 +106,7 @@
   has_function_literal_ = false;
   node->cond()->set_no_negative_zero(true);
   Visit(node->cond());
-  node->may_have_function_literal_ = has_function_literal_;
+  node->set_may_have_function_literal(has_function_literal_);
   Visit(node->body());
 }
 
@@ -119,7 +119,7 @@
     has_function_literal_ = false;
     node->cond()->set_no_negative_zero(true);
     Visit(node->cond());
-    node->may_have_function_literal_ = has_function_literal_;
+    node->set_may_have_function_literal(has_function_literal_);
   }
   Visit(node->body());
   if (node->next() != NULL) {
@@ -668,6 +668,11 @@
 }
 
 
+void AstOptimizer::VisitCompareToNull(CompareToNull* node) {
+  Visit(node->expression());
+}
+
+
 void AstOptimizer::VisitThisFunction(ThisFunction* node) {
   USE(node);
 }
@@ -960,6 +965,12 @@
 }
 
 
+void Processor::VisitCompareToNull(CompareToNull* node) {
+  USE(node);
+  UNREACHABLE();
+}
+
+
 void Processor::VisitThisFunction(ThisFunction* node) {
   USE(node);
   UNREACHABLE();