Initial skeleton of Subzero.

src/IceTypes.h

Index: src/IceTypes.h
diff --git a/src/IceTypes.h b/src/IceTypes.h
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+++ b/src/IceTypes.h
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+//===- 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
+
+namespace Ice {
+
+#define ICETYPE_TABLE                                                          \
+  /* enum value,  size in bytes, printable string */                           \
+  X(IceType_void, 0, "void") X(IceType_i1, 1, "i1") X(IceType_i8, 1, "i8")     \
+      X(IceType_i16, 2, "i16") X(IceType_i32, 4, "i32")                        \
+      X(IceType_i64, 8, "i64") X(IceType_f32, 4, "float")                      \
+      X(IceType_f64, 8, "double")
+
+#define X(tag, size, str) tag,
+
+enum IceType {
+  ICETYPE_TABLE
+};
+#undef X
+
+size_t typeWidthInBytes(IceType Type);
+
+template <> IceOstream &operator<<(class IceOstream &Str, const IceType &Type);
+
+} // end of namespace Ice
+
+#endif // SUBZERO_SRC_ICETYPES_H