[turbofan] Rename floating point register / slot methods.

src/compiler/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 <algorithm>
 #include <functional>
 #include <set>
 
@@ skipping 76 matching lines @@
                               std::bind2nd(std::ptr_fun(&Blocks), destination));
   if (blocker == moves->end()) {
     // The easy case: This move is not blocked.
     assembler_->AssembleMove(&source, &destination);
     move->Eliminate();
     return;
   }
 
   DCHECK((*blocker)->IsPending());
   // Ensure source is a register or both are stack slots, to limit swap cases.
-  if (source.IsStackSlot() || source.IsDoubleStackSlot()) {
+  if (source.IsStackSlot() || source.IsFPStackSlot()) {
     std::swap(source, destination);
   }
   assembler_->AssembleSwap(&source, &destination);
   move->Eliminate();
 
   // Any unperformed (including pending) move with a source of either this
   // move's source or destination needs to have their source changed to
   // reflect the state of affairs after the swap.
   for (MoveOperands* other : *moves) {
     if (other->Blocks(source)) {
       other->set_source(destination);
     } else if (other->Blocks(destination)) {
       other->set_source(source);
     }
   }
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8