[RegisterConfiguration] Streamline access to arch defaults, simplify Registers.

src/x64/assembler-x64.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 99 matching lines @@
   };
 
   static const int kNumRegisters = Code::kAfterLast;
 
   static Register from_code(int code) {
     DCHECK(code >= 0);
     DCHECK(code < kNumRegisters);
     Register r = {code};
     return r;
   }
-  const char* ToString();
-  bool IsAllocatable(RegisterConfiguration::CompilerSelector compiler =
-                         RegisterConfiguration::CRANKSHAFT) const;
   bool is_valid() const { return 0 <= reg_code && reg_code < kNumRegisters; }
   bool is(Register reg) const { return reg_code == reg.reg_code; }
   int code() const {
     DCHECK(is_valid());
     return reg_code;
   }
   int bit() const {
     DCHECK(is_valid());
     return 1 << reg_code;
   }
@@ skipping 81 matching lines @@
     kCode_no_reg = -1
   };
 
   static const int kMaxNumRegisters = Code::kAfterLast;
 
   static XMMRegister from_code(int code) {
     XMMRegister result = {code};
     return result;
   }
 
-  const char* ToString();
-  bool IsAllocatable(RegisterConfiguration::CompilerSelector compiler =
-                         RegisterConfiguration::CRANKSHAFT) const;
   bool is_valid() const { return 0 <= reg_code && reg_code < kMaxNumRegisters; }
   bool is(XMMRegister reg) const { return reg_code == reg.reg_code; }
   int code() const {
     DCHECK(is_valid());
     return reg_code;
   }
 
   // Return the high bit of the register code as a 0 or 1.  Used often
   // when constructing the REX prefix byte.
   int high_bit() const { return reg_code >> 3; }
@@ skipping 2046 matching lines @@
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X64_ASSEMBLER_X64_H_