Iasm and obj lowering for advanced switch lowering.

src/IceCfgNode.h

 //===- subzero/src/IceCfgNode.h - Control flow graph node -------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 36 matching lines @@
   }
 
   /// The HasReturn flag indicates that this node contains a return
   /// instruction and therefore needs an epilog.
   void setHasReturn() { HasReturn = true; }
   bool getHasReturn() const { return HasReturn; }
 
   void setNeedsPlacement(bool Value) { NeedsPlacement = Value; }
   bool needsPlacement() const { return NeedsPlacement; }
 
+  void setNeedsAlignment() { NeedsAlignment = true; }
+  bool needsAlignment() const { return NeedsAlignment; }
+
   /// \name Access predecessor and successor edge lists.
   /// @{
   const NodeList &getInEdges() const { return InEdges; }
   const NodeList &getOutEdges() const { return OutEdges; }
   /// @}
 
   /// \name Manage the instruction list.
   /// @{
   InstList &getInsts() { return Insts; }
   PhiList &getPhis() { return Phis; }
@@ skipping 36 matching lines @@
   void profileExecutionCount(VariableDeclaration *Var);
 
 private:
   CfgNode(Cfg *Func, SizeT LabelIndex);
   Cfg *const Func;
   SizeT Number; /// label index
   Cfg::IdentifierIndexType NameIndex =
       Cfg::IdentifierIndexInvalid; /// index into Cfg::NodeNames table
   bool HasReturn = false;          /// does this block need an epilog?
   bool NeedsPlacement = false;
+  bool NeedsAlignment = false;       /// is sandboxing required?
   InstNumberT InstCountEstimate = 0; /// rough instruction count estimate
   NodeList InEdges;                  /// in no particular order
   NodeList OutEdges;                 /// in no particular order
   PhiList Phis;                      /// unordered set of phi instructions
   InstList Insts;                    /// ordered list of non-phi instructions
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECFGNODE_H