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 IceCfgNode 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"
+
+class IceCfgNode {
+public:
+  static IceCfgNode *create(IceCfg *Cfg, uint32_t LabelIndex,
+                            IceString Name = "") {
+    return new IceCfgNode(Cfg, LabelIndex, Name);

[jvoung (off chromium), 2014/03/28 23:21:53]

should this new() use the cfg allocator too?

[Jim Stichnoth, 2014/03/29 14:23:22]

Done, also in IceVariable.  I'm leaving the IceConstants alone for now since
they may live longer than the Cfg in a global constant pool.

+  }
+
+  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_SRC_ICECFGNODE_H