Iasm and obj lowering for advanced switch lowering.

src/IceAssemblerX8664.h

 //===- subzero/src/IceAssemblerX8664.h - Assembler for x86-64 -*- C++ -*---===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 18 matching lines @@
   explicit AssemblerX8664(bool use_far_branches = false)
       : Assembler(Asm_X8664) {
     assert(!use_far_branches);
     (void)use_far_branches;
     llvm::report_fatal_error("Not yet implemented");
   }
 
   ~AssemblerX8664() override = default;
 
   void alignFunction() override;
+  void alignCfgNode() override;
   void padWithNop(intptr_t Padding) override;
   SizeT getBundleAlignLog2Bytes() const override;
   const char *getNonExecPadDirective() const override;
   llvm::ArrayRef<uint8_t> getNonExecBundlePadding() const override;
+  Label *getOrCreateCfgNodeLabel(SizeT NodeNumber) override;
   void bindCfgNodeLabel(SizeT NodeNumber) override;
   bool fixupIsPCRel(FixupKind Kind) const override;
 
   static bool classof(const Assembler *Asm) {
     return Asm->getKind() == Asm_X8664;
   }
 };
 
 } // end of namespace X8664
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEASSEMBLERX8664_H