[V8] Implement SIMD Boolean vector types to allow mask registers.

src/compiler/register-allocator.cc

 // 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.
 
 #include "src/base/adapters.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/register-allocator.h"
 #include "src/string-stream.h"
 
 namespace v8 {
@@ skipping 68 matching lines @@
     case MachineRepresentation::kTaggedSigned:
     case MachineRepresentation::kTaggedPointer:
     case MachineRepresentation::kTagged:
     case MachineRepresentation::kFloat32:
       return kPointerSize;
     case MachineRepresentation::kWord64:
     case MachineRepresentation::kFloat64:
       return kDoubleSize;
     case MachineRepresentation::kSimd128:
       return kSimd128Size;
+    case MachineRepresentation::kSimd1x4:
+    case MachineRepresentation::kSimd1x8:
+    case MachineRepresentation::kSimd1x16:
+      return kSimdMaskRegisters ? kPointerSize : kSimd128Size;
     case MachineRepresentation::kNone:
       break;
   }
   UNREACHABLE();
   return 0;
 }
 
 }  // namespace
 
 class LiveRangeBound {
@@ skipping 3907 matching lines @@
         }
       }
     }
   }
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8