[turbofan] add configuration parameters for register allocator

src/interface-descriptors.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_CALL_INTERFACE_DESCRIPTOR_H_
 #define V8_CALL_INTERFACE_DESCRIPTOR_H_
 
 #include "src/assembler.h"
 #include "src/macro-assembler.h"
 
@@ skipping 145 matching lines @@
     return GetParameterRepresentation(index + 1);
   }
 
   // Some platforms have extra information to associate with the descriptor.
   PlatformInterfaceDescriptor* platform_specific_descriptor() const {
     return data()->platform_specific_descriptor();
   }
 
   static const Register ContextRegister();
 
-  const char* DebugName(Isolate* isolate);
+  const char* DebugName(Isolate* isolate) const;
 
  protected:
   const CallInterfaceDescriptorData* data() const { return data_; }
 
  private:
   const CallInterfaceDescriptorData* data_;
 };
 
 
 #define DECLARE_DESCRIPTOR(name, base)                                     \
@@ skipping 317 matching lines @@
 }  // namespace v8::internal
 
 
 #if V8_TARGET_ARCH_ARM64
 #include "src/arm64/interface-descriptors-arm64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "src/arm/interface-descriptors-arm.h"
 #endif
 
 #endif  // V8_CALL_INTERFACE_DESCRIPTOR_H_