[Turbofan] Add concept of FP register aliasing on ARM 32.

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"
@@ skipping 221 matching lines @@
 inline bool CanBeTaggedPointer(MachineRepresentation rep) {
   return rep == MachineRepresentation::kTagged ||
          rep == MachineRepresentation::kTaggedPointer;
 }
 
 inline bool IsAnyTagged(MachineRepresentation rep) {
   return CanBeTaggedPointer(rep) || rep == MachineRepresentation::kTaggedSigned;
 }
 
 // Gets the log2 of the element size in bytes of the machine type.
-inline int ElementSizeLog2Of(MachineRepresentation rep) {
+V8_EXPORT_PRIVATE inline int ElementSizeLog2Of(MachineRepresentation rep) {
   switch (rep) {
     case MachineRepresentation::kBit:
     case MachineRepresentation::kWord8:
       return 0;
     case MachineRepresentation::kWord16:
       return 1;
     case MachineRepresentation::kWord32:
     case MachineRepresentation::kFloat32:
       return 2;
     case MachineRepresentation::kWord64:
@@ skipping 11 matching lines @@
   UNREACHABLE();
   return -1;
 }
 
 typedef Signature<MachineType> MachineSignature;
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MACHINE_TYPE_H_