Subzero. Adds x86-64 to the list of supported Subzero targets.

src/IceTargetLoweringX8664.cpp

Index: src/IceTargetLoweringX8664.cpp
diff --git a/src/IceTargetLoweringX8664.cpp b/src/IceTargetLoweringX8664.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..21be080681047e67dbb998beddf666665fbedb6a
--- /dev/null
+++ b/src/IceTargetLoweringX8664.cpp
@@ -0,0 +1,31 @@
+//===- subzero/src/IceTargetLoweringX8664.cpp - lowering for x86-64 -------===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Implements the Target Lowering for x86-64.
+//
+//===----------------------------------------------------------------------===//
+
+#include "IceDefs.h"
+#include "IceTargetLoweringX8664.h"
+
+namespace Ice {
+
+TargetX8664 *TargetX8664::create(Cfg *) {
+  llvm::report_fatal_error("Not yet implemented");
+}
+void TargetDataX8664::lowerGlobals(const VariableDeclarationList &,
+                                   const IceString &) {
+  llvm::report_fatal_error("Not yet implemented");
+}
+
+void TargetDataX8664::lowerConstants() {
+  llvm::report_fatal_error("Not yet implemented");
+}
+
+} // end of namespace Ice