Unify kMaxArguments with number of bits used to encode it.

src/objects.h

 // 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
@@ skipping 4284 matching lines @@
 class TypeFeedbackInfo;
 
 // Code describes objects with on-the-fly generated machine code.
 class Code: public HeapObject {
  public:
   // Opaque data type for encapsulating code flags like kind, inline
   // cache state, and arguments count.
   // FLAGS_MIN_VALUE and FLAGS_MAX_VALUE are specified to ensure that
   // enumeration type has correct value range (see Issue 830 for more details).
   enum Flags {
-    FLAGS_MIN_VALUE = kMinInt,
-    FLAGS_MAX_VALUE = kMaxInt
+    FLAGS_MIN_VALUE = 0,
+    FLAGS_MAX_VALUE = kMaxUInt32
   };
 
 #define CODE_KIND_LIST(V) \
   V(FUNCTION)             \
   V(OPTIMIZED_FUNCTION)   \
   V(STUB)                 \
   V(COMPILED_STUB)        \
   V(BUILTIN)              \
   V(LOAD_IC)              \
   V(KEYED_LOAD_IC)        \
@@ skipping 460 matching lines @@
   class StubMajorKeyField: public BitField<int,
       kStubMajorKeyFirstBit, kStubMajorKeyBits> {};  // NOLINT
 
   // KindSpecificFlags2 layout (FUNCTION)
   class StackCheckTableOffsetField: public BitField<int, 0, 31> {};
   class StackCheckPatchedForOSRField: public BitField<bool, 31, 1> {};
 
   // Signed field cannot be encoded using the BitField class.
   static const int kArgumentsCountShift = 17;
   static const int kArgumentsCountMask = ~((1 << kArgumentsCountShift) - 1);
+  static const int kArgumentsBits =
+      PlatformSmiTagging::kSmiValueSize - Code::kArgumentsCountShift + 1;
+  static const int kMaxArguments = (1 << kArgumentsBits) - 1;
 
   // This constant should be encodable in an ARM instruction.
   static const int kFlagsNotUsedInLookup =
       TypeField::kMask | CacheHolderField::kMask;
 
  private:
   friend class RelocIterator;
 
   // Code aging
   byte* FindCodeAgeSequence();
@@ skipping 4465 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_