Initial skeleton of Subzero.

src/IceCfgNode.h

Index: src/IceCfgNode.h
diff --git a/src/IceCfgNode.h b/src/IceCfgNode.h
new file mode 100644
index 0000000000000000000000000000000000000000..68efeb4dfaa176f6b7a373ad3cf1b7914d705fd8
--- /dev/null
+++ b/src/IceCfgNode.h
@@ -0,0 +1,52 @@
+//===- 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 IceCfgNode class, which represents a single
+// basic block as its instruction list, in-edge list, and out-edge
+// list.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SUBZERO_ICECFGNODE_H
+#define SUBZERO_ICECFGNODE_H
+
+#include "IceDefs.h"
+
+class IceCfgNode {
+public:
+  static IceCfgNode *create(IceCfg *Cfg, uint32_t LabelIndex,
+                            IceString Name = "") {
+    return new IceCfgNode(Cfg, LabelIndex, Name);
+  }
+
+  uint32_t getIndex() const { return Number; }
+  IceString getName() const;
+
+  const IceNodeList &getInEdges() const { return InEdges; }
+  const IceNodeList &getOutEdges() const { return OutEdges; }
+
+  IceInstList &getInsts() { return Insts; }
+  void appendInst(IceInst *Inst);
+
+  void registerEdges();
+
+  void dump(IceOstream &Str) const;
+
+private:
+  IceCfgNode(IceCfg *Cfg, uint32_t LabelIndex, IceString Name);
+  IceCfg *const Cfg;
+  const uint32_t Number; // label index
+  IceString Name;        // for dumping only
+  IceNodeList InEdges;   // in no particular order
+  IceNodeList OutEdges;  // in no particular order
+  IcePhiList Phis;       // unordered set of phi instructions
+  IceInstList Insts;     // ordered list of non-phi instructions
+};
+
+#endif // SUBZERO_ICECFGNODE_H