[turbofan] Rename floating point register / slot methods.

test/cctest/compiler/test-gap-resolver.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/compiler/gap-resolver.h"
 
 #include "src/base/utils/random-number-generator.h"
 #include "test/cctest/cctest.h"
 
 namespace v8 {
@@ skipping 63 matching lines @@
   }
 
   static Key KeyFor(const InstructionOperand& op) {
     bool is_constant = op.IsConstant();
     bool is_float = false;
     LocationOperand::LocationKind kind;
     int index;
     if (!is_constant) {
       if (op.IsRegister()) {
         index = LocationOperand::cast(op).GetRegister().code();
-      } else if (op.IsDoubleRegister()) {
+      } else if (op.IsFPRegister()) {
         index = LocationOperand::cast(op).GetDoubleRegister().code();
       } else {
         index = LocationOperand::cast(op).index();
       }
       is_float = IsFloatingPoint(LocationOperand::cast(op).representation());
       kind = LocationOperand::cast(op).location_kind();
     } else {
       index = ConstantOperand::cast(op).virtual_register();
       kind = LocationOperand::REGISTER;
     }
@@ skipping 156 matching lines @@
       resolver.Resolve(pm);
 
       CHECK(mi1.state() == mi2.state());
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8