Replaced unary negation by multiplication with -1.

src/typing.cc

 // Copyright 2013 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 401 matching lines @@
   }
 
   switch (expr->op()) {
     case Token::NOT:
     case Token::DELETE:
       NarrowType(expr, Bounds(Type::Boolean(), isolate_));
       break;
     case Token::VOID:
       NarrowType(expr, Bounds(Type::Undefined(), isolate_));
       break;
-    case Token::ADD:
-    case Token::SUB: {
-      Type* upper = *expr->expression()->bounds().upper;
-      if (!upper->Is(Type::Number())) upper = Type::Number();
-      NarrowType(expr, Bounds(Type::Smi(), upper, isolate_));
-      break;
-    }
     case Token::BIT_NOT:
       NarrowType(expr, Bounds(Type::Smi(), Type::Signed32(), isolate_));
       break;
     case Token::TYPEOF:
       NarrowType(expr, Bounds(Type::InternalizedString(), isolate_));
       break;
     default:
       UNREACHABLE();
   }
 }
@@ skipping 150 matching lines @@
 void AstTyper::VisitModuleUrl(ModuleUrl* module) {
 }
 
 
 void AstTyper::VisitModuleStatement(ModuleStatement* stmt) {
   RECURSE(Visit(stmt->body()));
 }
 
 
 } }  // namespace v8::internal