Subzero: Embed the revision string into translated output.

src/IceRevision.cpp

+//===- subzero/src/IceRevision.cpp - Revision string embedding ------------===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Implements the function for returning the Subzero revision string.
+///
+//===----------------------------------------------------------------------===//
+
+#include "IceRevision.h"
+
+#define XSTRINGIFY(x) STRINGIFY(x)
+#define STRINGIFY(x) #x
+
+#ifndef SUBZERO_REVISION
+#define SUBZERO_REVISION unknown
+#endif // !SUBZERO_REVISION
+
+namespace Ice {
+const char *getSubzeroRevision() {
+  return "Subzero_revision_" XSTRINGIFY(SUBZERO_REVISION);
+}
+} // end of namespace Ice