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

src/IceAssembler.h

 //===- subzero/src/IceAssembler.h - Integrated assembler --------*- C++ -*-===//
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // Modified by the Subzero authors.
 //
 //===----------------------------------------------------------------------===//
 //
 //                        The Subzero Code Generator
@@ skipping 285 matching lines @@
 
   AssemblerTextFixup *createTextFixup(const std::string &Text,
                                       size_t BytesUsed) {
     return Buffer.createTextFixup(Text, BytesUsed);
   }
 
   void setNeedsTextFixup() { Buffer.setNeedsTextFixup(); }
 
   bool needsTextFixup() const { return Buffer.needsTextFixup(); }
 
-  void emitIASBytes() const;
+  void emitIASBytes(GlobalContext *Ctx) const;
   bool getInternal() const { return IsInternal; }
   void setInternal(bool Internal) { IsInternal = Internal; }
   const IceString &getFunctionName() { return FunctionName; }
   void setFunctionName(const IceString &NewName) { FunctionName = NewName; }
   intptr_t getBufferSize() const { return Buffer.size(); }
   /// Roll back to a (smaller) size.
   void setBufferSize(intptr_t NewSize) { Buffer.setSize(NewSize); }
   void setPreliminary(bool Value) { Preliminary = Value; }
   bool getPreliminary() const { return Preliminary; }
 
   AssemblerKind getKind() const { return Kind; }
 
 protected:
-  explicit Assembler(AssemblerKind Kind, GlobalContext *Ctx)
-      : Kind(Kind), Allocator(), Ctx(Ctx), Buffer(*this) {}
+  explicit Assembler(AssemblerKind Kind)
+      : Kind(Kind), Allocator(), Buffer(*this) {}
 
 private:
   const AssemblerKind Kind;
 
   ArenaAllocator<32 * 1024> Allocator;
   /// FunctionName and IsInternal are transferred from the original Cfg object,
   /// since the Cfg object may be deleted by the time the assembler buffer is
   /// emitted.
   IceString FunctionName = "";
   bool IsInternal = false;
   /// Preliminary indicates whether a preliminary pass is being made for
   /// calculating bundle padding (Preliminary=true), versus the final pass where
   /// all changes to label bindings, label links, and relocation fixups are
   /// fully committed (Preliminary=false).
   bool Preliminary = false;
 
   /// Installs a created fixup, after it has been allocated.
   void installFixup(AssemblerFixup *F) { Buffer.installFixup(F); }
 
 protected:
-  GlobalContext *Ctx;
   // Buffer's constructor uses the Allocator, so it needs to appear after it.
   // TODO(jpp): dependencies on construction order are a nice way of shooting
   // yourself in the foot. Fix this.
   AssemblerBuffer Buffer;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEASSEMBLER_H_