Split side-effect flags from flags in Hydrogen instructions.

src/utils.h

-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2012 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
 //       with the distribution.
@@ skipping 912 matching lines @@
 
 
 // A poor man's version of STL's bitset: A bit set of enums E (without explicit
 // values), fitting into an integral type T.
 template <class E, class T = int>
 class EnumSet {
  public:
   explicit EnumSet(T bits = 0) : bits_(bits) {}
   bool IsEmpty() const { return bits_ == 0; }
   bool Contains(E element) const { return (bits_ & Mask(element)) != 0; }
+  bool ContainsAnyOf(const EnumSet& set) const {
+    return (bits_ & set.bits_) != 0;
+  }
   void Add(E element) { bits_ |= Mask(element); }
+  void Add(const EnumSet& set) { bits_ |= set.bits_; }
   void Remove(E element) { bits_ &= ~Mask(element); }
+  void Remove(const EnumSet& set) { bits_ &= ~set.bits_; }
+  void RemoveAll() { bits_ = 0; }
+  void Intersect(const EnumSet& set) { bits_ &= set.bits_; }
   T ToIntegral() const { return bits_; }
+  bool operator==(const EnumSet& set) { return bits_ == set.bits_; }
 
  private:
   T Mask(E element) const {
     // The strange typing in ASSERT is necessary to avoid stupid warnings, see:
     // http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43680
     ASSERT(element < static_cast<int>(sizeof(T) * CHAR_BIT));
     return 1 << element;
   }
 
   T bits_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_UTILS_H_