[turbofan] Remove representation axis for float64 fields.

src/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_TYPES_H_
 #define V8_TYPES_H_
 
 #include "src/conversions.h"
 #include "src/handles.h"
 #include "src/objects.h"
@@ skipping 733 matching lines @@
     tuple->AsTuple()->InitElement(1, second);
     tuple->AsTuple()->InitElement(2, third);
     return tuple;
   }
 
 #define CONSTRUCT_SIMD_TYPE(NAME, Name, name, lane_count, lane_type) \
   static Type* Name(Isolate* isolate, Zone* zone);
   SIMD128_TYPES(CONSTRUCT_SIMD_TYPE)
 #undef CONSTRUCT_SIMD_TYPE
 
-  static Type* Union(Type* type1, Type* type2, Zone* reg);
-  static Type* Intersect(Type* type1, Type* type2, Zone* reg);
+  static Type* Union(Type* type1, Type* type2, Zone* zone);
+  static Type* Intersect(Type* type1, Type* type2, Zone* zone);
 
   static Type* Of(double value, Zone* zone) {
     return BitsetType::New(BitsetType::ExpandInternals(BitsetType::Lub(value)));
   }
   static Type* Of(i::Object* value, Zone* zone) {
     return BitsetType::New(BitsetType::ExpandInternals(BitsetType::Lub(value)));
   }
   static Type* Of(i::Handle<i::Object> value, Zone* zone) {
     return Of(*value, zone);
   }
@@ skipping 207 matching lines @@
 
   bool Narrows(Bounds that) {
     return that.lower->Is(this->lower) && this->upper->Is(that.upper);
   }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TYPES_H_