Nuke CompareToNull AST node.

src/full-codegen.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 226 matching lines @@
 
 void BreakableStatementChecker::VisitBinaryOperation(BinaryOperation* expr) {
   Visit(expr->left());
   if (expr->op() != Token::AND &&
       expr->op() != Token::OR) {
     Visit(expr->right());
   }
 }
 
 
-void BreakableStatementChecker::VisitCompareToNull(CompareToNull* expr) {
-  Visit(expr->expression());
-}
-
-
 void BreakableStatementChecker::VisitCompareOperation(CompareOperation* expr) {
   Visit(expr->left());
   Visit(expr->right());
 }
 
 
 void BreakableStatementChecker::VisitThisFunction(ThisFunction* expr) {
 }
 
 
@@ skipping 1056 matching lines @@
   __ PopTryHandler();
   *stack_depth = 0;
   return previous_;
 }
 
 
 bool FullCodeGenerator::TryLiteralCompare(CompareOperation* compare,
                                           Label* if_true,
                                           Label* if_false,
                                           Label* fall_through) {
+  bool is_strict = compare->op() == Token::EQ_STRICT;
   Expression *expr;
   Handle<String> check;
   if (compare->IsLiteralCompareTypeof(&expr, &check)) {
     EmitLiteralCompareTypeof(expr, check, if_true, if_false, fall_through);
     return true;
   }
 
   if (compare->IsLiteralCompareUndefined(&expr)) {
     EmitLiteralCompareUndefined(expr, if_true, if_false, fall_through);
     return true;
   }
 
+  if (compare->IsLiteralCompareNull(&expr)) {
+    EmitLiteralCompareNull(expr, is_strict, if_true, if_false, fall_through);
+    return true;
+  }
+
   return false;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal