Initial skeleton of Subzero.

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.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the CfgNode class, which represents a single
+// basic block as its instruction list, in-edge list, and out-edge
+// list.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SUBZERO_SRC_ICECFGNODE_H
+#define SUBZERO_SRC_ICECFGNODE_H
+
+#include "IceDefs.h"
+
+namespace Ice {
+
+class CfgNode {
+public:
+  static CfgNode *create(Cfg *Func, SizeT LabelIndex, IceString Name = "") {
+    return new (Func->allocate<CfgNode>()) CfgNode(Func, LabelIndex, Name);
+  }
+
+  // Access the label number and name for this node.
+  SizeT getIndex() const { return Number; }
+  IceString getName() const;
+
+  // Access predecessor and successor edge lists.
+  const NodeList &getInEdges() const { return InEdges; }
+  const NodeList &getOutEdges() const { return OutEdges; }
+
+  // Manage the instruction list.
+  InstList &getInsts() { return Insts; }
+  void appendInst(Inst *Inst);
+
+  // Add a predecessor edge to the InEdges list for each of this
+  // node's successors.
+  void computePredecessors();
+
+  void dump(Cfg *Func) const;
+
+private:
+  CfgNode(Cfg *Func, SizeT LabelIndex, IceString Name);
+  CfgNode(const CfgNode &) LLVM_DELETED_FUNCTION;
+  CfgNode &operator=(const CfgNode &) LLVM_DELETED_FUNCTION;
+  Cfg *const Func;
+  const SizeT Number; // label index
+  IceString Name;     // for dumping only
+  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