[turbofan] Mark MachineType as uint16_t.

src/compiler/machine-type.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_MACHINE_TYPE_H_
 #define V8_COMPILER_MACHINE_TYPE_H_
 
 #include <iosfwd>
 
 #include "src/base/bits.h"
 #include "src/globals.h"
 #include "src/signature.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Machine-level types and representations.
 // TODO(titzer): Use the real type system instead of MachineType.
-enum MachineType {
+enum MachineType : uint16_t {
   // Representations.
-  kRepBit = 1 << 0,
-  kRepWord8 = 1 << 1,
-  kRepWord16 = 1 << 2,
-  kRepWord32 = 1 << 3,
-  kRepWord64 = 1 << 4,
-  kRepFloat32 = 1 << 5,
-  kRepFloat64 = 1 << 6,
-  kRepTagged = 1 << 7,
+  kRepBit = 1u << 0,
+  kRepWord8 = 1u << 1,
+  kRepWord16 = 1u << 2,
+  kRepWord32 = 1u << 3,
+  kRepWord64 = 1u << 4,
+  kRepFloat32 = 1u << 5,
+  kRepFloat64 = 1u << 6,
+  kRepTagged = 1u << 7,
 
   // Types.
-  kTypeBool = 1 << 8,
-  kTypeInt32 = 1 << 9,
-  kTypeUint32 = 1 << 10,
-  kTypeInt64 = 1 << 11,
-  kTypeUint64 = 1 << 12,
-  kTypeNumber = 1 << 13,
-  kTypeAny = 1 << 14,
+  kTypeBool = 1u << 8,
+  kTypeInt32 = 1u << 9,
+  kTypeUint32 = 1u << 10,
+  kTypeInt64 = 1u << 11,
+  kTypeUint64 = 1u << 12,
+  kTypeNumber = 1u << 13,
+  kTypeAny = 1u << 14,
 
   // Machine types.
-  kMachNone = 0,
+  kMachNone = 0u,
   kMachBool = kRepBit | kTypeBool,
   kMachFloat32 = kRepFloat32 | kTypeNumber,
   kMachFloat64 = kRepFloat64 | kTypeNumber,
   kMachInt8 = kRepWord8 | kTypeInt32,
   kMachUint8 = kRepWord8 | kTypeUint32,
   kMachInt16 = kRepWord16 | kTypeInt32,
   kMachUint16 = kRepWord16 | kTypeUint32,
   kMachInt32 = kRepWord32 | kTypeInt32,
   kMachUint32 = kRepWord32 | kTypeUint32,
   kMachInt64 = kRepWord64 | kTypeInt64,
   kMachUint64 = kRepWord64 | kTypeUint64,
   kMachIntPtr = (kPointerSize == 4) ? kMachInt32 : kMachInt64,
   kMachUintPtr = (kPointerSize == 4) ? kMachUint32 : kMachUint64,
   kMachPtr = (kPointerSize == 4) ? kRepWord32 : kRepWord64,
   kMachAnyTagged = kRepTagged | kTypeAny
 };
 
+V8_INLINE size_t hash_value(MachineType type) {
+  return static_cast<size_t>(type);
+}
+
 std::ostream& operator<<(std::ostream& os, const MachineType& type);
 
 typedef uint16_t MachineTypeUnion;
 
 // Globally useful machine types and constants.
 const MachineTypeUnion kRepMask = kRepBit | kRepWord8 | kRepWord16 |
                                   kRepWord32 | kRepWord64 | kRepFloat32 |
                                   kRepFloat64 | kRepTagged;
 const MachineTypeUnion kTypeMask = kTypeBool | kTypeInt32 | kTypeUint32 |
                                    kTypeInt64 | kTypeUint64 | kTypeNumber |
@@ skipping 42 matching lines @@
   return 1 << shift;
 }
 
 typedef Signature<MachineType> MachineSignature;
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_TYPE_H_