Add a kSimd128 machine type for Turbofan.

src/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_MACHINE_TYPE_H_
 #define V8_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 {
 
 enum class MachineRepresentation : uint8_t {
   kNone,
   kBit,
   kWord8,
   kWord16,
   kWord32,
   kWord64,
   kFloat32,
   kFloat64,
+  kSimd128,
   kTagged
 };
 
 enum class MachineSemantic : uint8_t {
   kNone,
   kBool,
   kInt32,
   kUint32,
   kInt64,
   kUint64,
@@ skipping 40 matching lines @@
     return (kPointerSize == 4) ? Int32() : Int64();
   }
   static MachineType Float32() {
     return MachineType(MachineRepresentation::kFloat32,
                        MachineSemantic::kNumber);
   }
   static MachineType Float64() {
     return MachineType(MachineRepresentation::kFloat64,
                        MachineSemantic::kNumber);
   }
+  static MachineType Simd128() {
+    return MachineType(MachineRepresentation::kSimd128, MachineSemantic::kNone);
+  }
   static MachineType Int8() {
     return MachineType(MachineRepresentation::kWord8, MachineSemantic::kInt32);
   }
   static MachineType Uint8() {
     return MachineType(MachineRepresentation::kWord8, MachineSemantic::kUint32);
   }
   static MachineType Int16() {
     return MachineType(MachineRepresentation::kWord16, MachineSemantic::kInt32);
   }
   static MachineType Uint16() {
@@ skipping 39 matching lines @@
   }
   static MachineType RepWord64() {
     return MachineType(MachineRepresentation::kWord64, MachineSemantic::kNone);
   }
   static MachineType RepFloat32() {
     return MachineType(MachineRepresentation::kFloat32, MachineSemantic::kNone);
   }
   static MachineType RepFloat64() {
     return MachineType(MachineRepresentation::kFloat64, MachineSemantic::kNone);
   }
+  static MachineType RepSimd128() {
+    return MachineType(MachineRepresentation::kSimd128, MachineSemantic::kNone);
+  }
   static MachineType RepTagged() {
     return MachineType(MachineRepresentation::kTagged, MachineSemantic::kNone);
   }
   static MachineType RepBit() {
     return MachineType(MachineRepresentation::kBit, MachineSemantic::kNone);
   }
 
  private:
   MachineRepresentation representation_;
   MachineSemantic semantic_;
@@ skipping 24 matching lines @@
     case MachineRepresentation::kWord8:
       return 0;
     case MachineRepresentation::kWord16:
       return 1;
     case MachineRepresentation::kWord32:
     case MachineRepresentation::kFloat32:
       return 2;
     case MachineRepresentation::kWord64:
     case MachineRepresentation::kFloat64:
       return 3;
+    case MachineRepresentation::kSimd128:
+      return 4;
     case MachineRepresentation::kTagged:
       return kPointerSizeLog2;
     default:
       break;
   }
   UNREACHABLE();
   return -1;
 }
 
 typedef Signature<MachineType> MachineSignature;
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MACHINE_TYPE_H_