Start adding an integrated assembler.

src/IceCfg.h

 //===- subzero/src/IceCfg.h - Control flow graph ----------------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the Cfg class, which represents the control flow
 // graph and the overall per-function compilation context.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICECFG_H
 #define SUBZERO_SRC_ICECFG_H
 
 #include "IceDefs.h"
 #include "IceTypes.h"
+
+#include "assembler.h"
+#include "IceClFlags.h"
 #include "IceGlobalContext.h"
 
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/Support/Allocator.h"
 
 namespace Ice {
 
 class Cfg {
 public:
   Cfg(GlobalContext *Ctx);
@@ skipping 37 matching lines @@
   const VarList &getVariables() const { return Variables; }
 
   // Manage arguments to the function.
   void addArg(Variable *Arg);
   const VarList &getArgs() const { return Args; }
   VarList &getArgs() { return Args; }
 
   // Miscellaneous accessors.
   TargetLowering *getTarget() const { return Target.get(); }
   Liveness *getLiveness() const { return Live.get(); }
+  template <typename T> T *getAssembler() const {
+    return static_cast<T *>(TargetAssembler.get());
+  }
+  bool UseIntegratedAssembler() const {
+    return getContext()->getFlags().UseIntegratedAssembler;
+  }
   bool hasComputedFrame() const;
 
   // Passes over the CFG.
   void translate();
   // After the CFG is fully constructed, iterate over the nodes and
   // compute the predecessor edges, in the form of
   // CfgNode::InEdges[].
   void computePredecessors();
   void renumberInstructions();
   void placePhiLoads();
@@ skipping 56 matching lines @@
   bool IsInternalLinkage;
   bool HasError;
   IceString ErrorMessage;
   CfgNode *Entry; // entry basic block
   NodeList Nodes; // linearized node list; Entry should be first
   InstNumberT NextInstNumber;
   VarList Variables;
   VarList Args; // subset of Variables, in argument order
   llvm::OwningPtr<Liveness> Live;
   llvm::OwningPtr<TargetLowering> Target;
+  llvm::OwningPtr<Assembler> TargetAssembler;
 
   // CurrentNode is maintained during dumping/emitting just for
   // validating Variable::DefNode.  Normally, a traversal over
   // CfgNodes maintains this, but before global operations like
   // register allocation, setCurrentNode(NULL) should be called to
   // avoid spurious validation failures.
   const CfgNode *CurrentNode;
 
   Cfg(const Cfg &) LLVM_DELETED_FUNCTION;
   Cfg &operator=(const Cfg &) LLVM_DELETED_FUNCTION;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECFG_H