1 files changed, 42 insertions, 0 deletions
diff --git a/include/llvm/Target/TargetSubtarget.h b/include/llvm/Target/TargetSubtarget.h
new file mode 100644
index 0000000000000..eca45eb0d7459
--- /dev/null
+++ b/include/llvm/Target/TargetSubtarget.h
@@ -0,0 +1,42 @@
+//==-- llvm/Target/TargetSubtarget.h - Target Information --------*- C++ -*-==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file describes the subtarget options of a Target machine.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TARGET_TARGETSUBTARGET_H
+#define LLVM_TARGET_TARGETSUBTARGET_H
+
+namespace llvm {
+
+//===----------------------------------------------------------------------===//
+///
+/// TargetSubtarget - Generic base class for all target subtargets.  All
+/// Target-specific options that control code generation and printing should
+/// be exposed through a TargetSubtarget-derived class.
+///
+class TargetSubtarget {
+  TargetSubtarget(const TargetSubtarget&);   // DO NOT IMPLEMENT
+  void operator=(const TargetSubtarget&);  // DO NOT IMPLEMENT
+protected: // Can only create subclasses...
+  TargetSubtarget();
+public:
+  virtual ~TargetSubtarget();
+
+  /// getSpecialAddressLatency - For targets where it is beneficial to
+  /// backschedule instructions that compute addresses, return a value
+  /// indicating the number of scheduling cycles of backscheduling that
+  /// should be attempted.
+  virtual unsigned getSpecialAddressLatency() const { return 0; }
+};
+
+} // End llvm namespace
+
+#endif