[turbofan] Introduce an ExternalPointer type.

src/compiler/types.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_COMPILER_TYPES_H_
 #define V8_COMPILER_TYPES_H_
 
 #include "src/base/compiler-specific.h"
 #include "src/conversions.h"
 #include "src/globals.h"
@@ skipping 105 matching lines @@
   V(Symbol,              1u << 12)  \
   V(InternalizedString,  1u << 13)  \
   V(OtherString,         1u << 14)  \
   V(Simd,                1u << 15)  \
   V(OtherObject,         1u << 17)  \
   V(OtherUndetectable,   1u << 16)  \
   V(Proxy,               1u << 18)  \
   V(Function,            1u << 19)  \
   V(Hole,                1u << 20)  \
   V(OtherInternal,       1u << 21)  \
+  V(ExternalPointer,     1u << 22)  \
   \
   V(Signed31,                   kUnsigned30 | kNegative31) \
   V(Signed32,                   kSigned31 | kOtherUnsigned31 | kOtherSigned32) \
   V(Signed32OrMinusZero,        kSigned32 | kMinusZero) \
   V(Signed32OrMinusZeroOrNaN,   kSigned32 | kMinusZero | kNaN) \
   V(Negative32,                 kNegative31 | kOtherSigned32) \
   V(Unsigned31,                 kUnsigned30 | kOtherUnsigned31) \
   V(Unsigned32,                 kUnsigned30 | kOtherUnsigned31 | \
                                 kOtherUnsigned32) \
   V(Unsigned32OrMinusZero,      kUnsigned32 | kMinusZero) \
@@ skipping 17 matching lines @@
   V(NumberOrString,             kNumber | kString) \
   V(NumberOrUndefined,          kNumber | kUndefined) \
   V(PlainPrimitive,             kNumberOrString | kBoolean | kNullOrUndefined) \
   V(Primitive,                  kSymbol | kSimd | kPlainPrimitive) \
   V(DetectableReceiver,         kFunction | kOtherObject | kProxy) \
   V(Object,                     kFunction | kOtherObject | kOtherUndetectable) \
   V(Receiver,                   kObject | kProxy) \
   V(StringOrReceiver,           kString | kReceiver) \
   V(Unique,                     kBoolean | kUniqueName | kNull | kUndefined | \
                                 kReceiver) \
-  V(Internal,                   kHole | kOtherInternal) \
+  V(Internal,                   kHole | kExternalPointer | kOtherInternal) \
   V(NonInternal,                kPrimitive | kReceiver) \
   V(NonNumber,                  kUnique | kString | kInternal) \
   V(Any,                        0xfffffffeu)
 
 // clang-format on
 
 /*
  * The following diagrams show how integers (in the mathematical sense) are
  * divided among the different atomic numerical types.
  *
@@ skipping 467 matching lines @@
                           RangeType::Limits* limits, Zone* zone);
   static Type* NormalizeUnion(Type* unioned, int size, Zone* zone);
   static Type* NormalizeRangeAndBitset(Type* range, bitset* bits, Zone* zone);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_TYPES_H_