Subzero: Refactor x86 register definitions to use the alias mechanism.

src/IceConverter.cpp

 //===- subzero/src/IceConverter.cpp - Converts LLVM to Ice  ---------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 650 matching lines @@
   /// Converts global variables, and their initializers into ICE global variable
   /// declarations, for module Mod. Returns the set of converted declarations.
   std::unique_ptr<Ice::VariableDeclarationList>
   convertGlobalsToIce(Module *Mod);
 
 private:
   // Adds the Initializer to the list of initializers for the Global variable
   // declaration.
   void addGlobalInitializer(Ice::VariableDeclaration &Global,
                             const Constant *Initializer) {
-    const bool HasOffset = false;
-    const Ice::RelocOffsetT Offset = 0;
+    constexpr bool HasOffset = false;
+    constexpr Ice::RelocOffsetT Offset = 0;
     addGlobalInitializer(Global, Initializer, HasOffset, Offset);
   }
 
   // Adds Initializer to the list of initializers for Global variable
   // declaration. HasOffset is true only if Initializer is a relocation
   // initializer and Offset should be added to the relocation.
   void addGlobalInitializer(Ice::VariableDeclaration &Global,
                             const Constant *Initializer, bool HasOffset,
                             Ice::RelocOffsetT Offset);
 
@@ skipping 235 matching lines @@
       Ctx->pushTimer(TimerID, StackID);
     }
     LLVM2ICEFunctionConverter FunctionConverter(*this);
     FunctionConverter.convertFunction(&I);
     if (TimeThisFunction)
       Ctx->popTimer(TimerID, StackID);
   }
 }
 
 } // end of namespace Ice