[turbofan] Various fixes to allow unboxed doubles as arguments in registers and on the stack.

src/compiler/linkage.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/code-stubs.h"
 #include "src/compiler.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node.h"
 #include "src/compiler/pipeline.h"
@@ skipping 19 matching lines @@
       os << "InterpreterDispatch";
       break;
   }
   return os;
 }
 
 
 std::ostream& operator<<(std::ostream& os, const CallDescriptor& d) {
   // TODO(svenpanne) Output properties etc. and be less cryptic.
   return os << d.kind() << ":" << d.debug_name() << ":r" << d.ReturnCount()
-            << "j" << d.JSParameterCount() << "i" << d.InputCount() << "f"
+            << "s" << d.StackParameterCount() << "i" << d.InputCount() << "f"
             << d.FrameStateCount() << "t" << d.SupportsTailCalls();
 }
 
 
 bool CallDescriptor::HasSameReturnLocationsAs(
     const CallDescriptor* other) const {
   if (ReturnCount() != other->ReturnCount()) return false;
   for (size_t i = 0; i < ReturnCount(); ++i) {
     if (GetReturnLocation(i) != other->GetReturnLocation(i)) return false;
   }
@@ skipping 229 matching lines @@
     Operator::Properties properties, MachineType return_type) {
   UNIMPLEMENTED();
   return NULL;
 }
 
 
 #endif  // !V8_TURBOFAN_BACKEND
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8