[turbofan] Performance enhancements for escape analysis

src/base/flags.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_BASE_FLAGS_H_
 #define V8_BASE_FLAGS_H_
 
 #include <cstddef>
 
 #include "src/base/compiler-specific.h"
@@ skipping 90 matching lines @@
   inline Type operator|(Type::flag_type lhs, const Type& rhs) {               \
     return rhs | lhs;                                                         \
   }                                                                           \
   inline void operator|(Type::flag_type lhs, Type::mask_type rhs)             \
       ALLOW_UNUSED_TYPE;                                                      \
   inline void operator|(Type::flag_type lhs, Type::mask_type rhs) {}          \
   inline Type operator^(Type::flag_type lhs, Type::flag_type rhs)             \
       ALLOW_UNUSED_TYPE WARN_UNUSED_RESULT;                                   \
   inline Type operator^(Type::flag_type lhs, Type::flag_type rhs) {           \
     return Type(lhs) ^ rhs;                                                   \
-  } inline Type operator^(Type::flag_type lhs, const Type& rhs)               \
+  } inline Type                                                               \
+  operator^(Type::flag_type lhs, const Type& rhs)                             \
       ALLOW_UNUSED_TYPE WARN_UNUSED_RESULT;                                   \
   inline Type operator^(Type::flag_type lhs, const Type& rhs) {               \
     return rhs ^ lhs;                                                         \
-  } inline void operator^(Type::flag_type lhs, Type::mask_type rhs)           \
-      ALLOW_UNUSED_TYPE;                                                      \
-  inline void operator^(Type::flag_type lhs, Type::mask_type rhs) {}
+  } inline void                                                               \
+  operator^(Type::flag_type lhs, Type::mask_type rhs) ALLOW_UNUSED_TYPE;      \
+  inline void operator^(Type::flag_type lhs, Type::mask_type rhs) {           \
+  } inline Type                                                               \
+  operator~(Type::flag_type val)ALLOW_UNUSED_TYPE;                            \
+  inline Type operator~(Type::flag_type val) { return ~Type(val); }
 
 }  // namespace base
 }  // namespace v8
 
 #endif  // V8_BASE_FLAGS_H_