Initial skeleton of Subzero.

src/IceTypes.h

+//===- subzero/src/IceTypes.h - Primitive ICE types -------------*- 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 a few properties of the primitive types allowed
+// in Subzero.  Every Subzero source file is expected to include
+// IceTypes.h.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SUBZERO_SRC_ICETYPES_H
+#define SUBZERO_SRC_ICETYPES_H
+
+enum IceType {
+  IceType_void,
+  IceType_i1,
+  IceType_i8,
+  IceType_i16,
+  IceType_i32,
+  IceType_i64,
+  IceType_f32,
+  IceType_f64,
+  IceType_NUM
+};
+
+uint32_t iceTypeWidth(IceType T);
+IceOstream &operator<<(class IceOstream &Str, IceType T);
+
+#endif // SUBZERO_SRC_ICETYPES_H