[turbofan] add configuration parameters for register allocator

src/interface-descriptors.cc

 // Copyright 2012 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/v8.h"
 
 #include "src/interface-descriptors.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 24 matching lines @@
       // If there is a context register, the representation must be tagged.
       DCHECK(
           i != 0 ||
           register_param_representations[i].Equals(Representation::Tagged()));
       register_param_representations_[i] = register_param_representations[i];
     }
   }
 }
 
 
-const char* CallInterfaceDescriptor::DebugName(Isolate* isolate) {
+const char* CallInterfaceDescriptor::DebugName(Isolate* isolate) const {
   CallInterfaceDescriptorData* start = isolate->call_descriptor_data(0);
   size_t index = data_ - start;
   DCHECK(index < CallDescriptors::NUMBER_OF_DESCRIPTORS);
   CallDescriptors::Key key = static_cast<CallDescriptors::Key>(index);
   switch (key) {
 #define DEF_CASE(NAME)        \
   case CallDescriptors::NAME: \
     return #NAME " Descriptor";
     INTERFACE_DESCRIPTOR_LIST(DEF_CASE)
 #undef DEF_CASE
@@ skipping 85 matching lines @@
 }
 
 
 void ContextOnlyDescriptor::Initialize(CallInterfaceDescriptorData* data) {
   Register registers[] = {ContextRegister()};
   data->Initialize(arraysize(registers), registers, NULL);
 }
 
 }
 }  // namespace v8::internal