diff --git a/include/llvm/IntrinsicLowering.h b/include/llvm/IntrinsicLowering.h
deleted file mode 100644
index 43a4c991cf0..00000000000
--- a/include/llvm/IntrinsicLowering.h
+++ /dev/null
@@ -1,73 +0,0 @@
-//===-- llvm/IntrinsicLowering.h - Intrinsic Function Lowering --*- C++ -*-===//
-// 
-//                     The LLVM Compiler Infrastructure
-//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
-//===----------------------------------------------------------------------===//
-// 
-// This file defines the IntrinsicLowering interface.  This interface allows
-// addition of domain-specific or front-end specific intrinsics to LLVM without
-// having to modify all of the target-machines to support the new intrinsic.
-// Later, as desired, code generators can incrementally add support for
-// particular intrinsic functions, as desired, to generate better code.
-//
-// If a code generator cannot handle or does not know about an intrinsic
-// function, it will use the intrinsic lowering interface to change an intrinsic
-// function name into a concrete function name which can be used to implement
-// the functionality of the intrinsic.  For example, llvm.acos can be
-// implemented as a call to the math library 'acos' function if the target
-// doesn't have hardware support for the intrinsic, or if it has not yet been
-// implemented yet.
-//
-// Another use for this interface is the addition of domain-specific intrinsics.
-// The default implementation of this interface would then lower the intrinsics
-// to noop calls, allowing the direct execution of programs with instrumentation
-// or other hooks placed in them.  When a specific tool or flag is used, a
-// different implementation of these interfaces may be used, which activates the
-// intrinsics in some way.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_INTRINSICLOWERING_H
-#define LLVM_INTRINSICLOWERING_H
-
-#include "llvm/Intrinsics.h"
-
-namespace llvm {
-  class CallInst;
-  class Module;
-  
-  struct IntrinsicLowering {
-    virtual ~IntrinsicLowering() {}
-
-    /// AddPrototypes - This method, if called, causes all of the prototypes
-    /// that might be needed by an intrinsic lowering implementation to be
-    /// inserted into the module specified.
-    virtual void AddPrototypes(Module &M) = 0;
-
-    /// LowerIntrinsicCall - This method returns the LLVM function which should
-    /// be used to implement the specified intrinsic function call.  If an
-    /// intrinsic function must be implemented by the code generator (such as
-    /// va_start), this function should print a message and abort.
-    ///
-    /// Otherwise, if an intrinsic function call can be lowered, the code to
-    /// implement it (often a call to a non-intrinsic function) is inserted
-    /// _after_ the call instruction and the call is deleted.  The caller must
-    /// be capable of handling this kind of change.
-    ///
-    virtual void LowerIntrinsicCall(CallInst *CI) = 0;
-  };
-
-  /// DefaultIntrinsicLower - This is the default intrinsic lowering pass which
-  /// is used if no other one is specified.  Custom intrinsic lowering
-  /// implementations should pass any unhandled intrinsics to this
-  /// implementation to allow for future extensibility.
-  struct DefaultIntrinsicLowering : public IntrinsicLowering {
-    virtual void AddPrototypes(Module &M);
-    virtual void LowerIntrinsicCall(CallInst *CI);    
-  };
-}
-
-#endif