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diff --git a/contrib/llvm/lib/Target/X86/Utils/X86ShuffleDecode.h b/contrib/llvm/lib/Target/X86/Utils/X86ShuffleDecode.h
new file mode 100644
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--- /dev/null
+++ b/contrib/llvm/lib/Target/X86/Utils/X86ShuffleDecode.h
@@ -0,0 +1,138 @@
+//===-- X86ShuffleDecode.h - X86 shuffle decode logic -----------*-C++-*---===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Define several functions to decode x86 specific shuffle semantics into a
+// generic vector mask.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_X86_UTILS_X86SHUFFLEDECODE_H
+#define LLVM_LIB_TARGET_X86_UTILS_X86SHUFFLEDECODE_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/ArrayRef.h"
+
+//===----------------------------------------------------------------------===//
+//  Vector Mask Decoding
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+class Constant;
+class MVT;
+
+enum { SM_SentinelUndef = -1, SM_SentinelZero = -2 };
+
+void DecodeINSERTPSMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
+
+// <3,1> or <6,7,2,3>
+void DecodeMOVHLPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask);
+
+// <0,2> or <0,1,4,5>
+void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask);
+
+void DecodeMOVSLDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
+
+void DecodeMOVSHDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
+
+void DecodeMOVDDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
+
+void DecodePSLLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
+
+void DecodePSRLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
+
+void DecodePALIGNRMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
+
+void DecodePSHUFMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
+
+void DecodePSHUFHWMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
+
+void DecodePSHUFLWMask(MVT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decodes a PSWAPD 3DNow! instruction.
+void DecodePSWAPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
+
+/// DecodeSHUFPMask - This decodes the shuffle masks for shufp*. VT indicates
+/// the type of the vector allowing it to handle different datatypes and vector
+/// widths.
+void DecodeSHUFPMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
+
+/// DecodeUNPCKHMask - This decodes the shuffle masks for unpckhps/unpckhpd
+/// and punpckh*. VT indicates the type of the vector allowing it to handle
+/// different datatypes and vector widths.
+void DecodeUNPCKHMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
+
+/// DecodeUNPCKLMask - This decodes the shuffle masks for unpcklps/unpcklpd
+/// and punpckl*. VT indicates the type of the vector allowing it to handle
+/// different datatypes and vector widths.
+void DecodeUNPCKLMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a PSHUFB mask from an IR-level vector constant.
+void DecodePSHUFBMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a PSHUFB mask from a raw array of constants such as from
+/// BUILD_VECTOR.
+void DecodePSHUFBMask(ArrayRef<uint64_t> RawMask,
+                      SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a BLEND immediate mask into a shuffle mask.
+void DecodeBLENDMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
+
+void DecodeVPERM2X128Mask(MVT VT, unsigned Imm,
+                          SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a shuffle packed values at 128-bit granularity
+/// immediate mask into a shuffle mask.
+void decodeVSHUF64x2FamilyMask(MVT VT, unsigned Imm,
+                               SmallVectorImpl<int> &ShuffleMask);
+
+/// DecodeVPERMMask - this decodes the shuffle masks for VPERMQ/VPERMPD.
+/// No VT provided since it only works on 256-bit, 4 element vectors.
+void DecodeVPERMMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a VPERMILP variable mask from an IR-level vector constant.
+void DecodeVPERMILPMask(const Constant *C, unsigned ElSize,
+                        SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a zero extension instruction as a shuffle mask.
+void DecodeZeroExtendMask(MVT SrcVT, MVT DstVT,
+                          SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a move lower and zero upper instruction as a shuffle mask.
+void DecodeZeroMoveLowMask(MVT VT, SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a scalar float move instruction as a shuffle mask.
+void DecodeScalarMoveMask(MVT VT, bool IsLoad,
+                          SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a SSE4A EXTRQ instruction as a v16i8 shuffle mask.
+void DecodeEXTRQIMask(int Len, int Idx,
+                      SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a SSE4A INSERTQ instruction as a v16i8 shuffle mask.
+void DecodeINSERTQIMask(int Len, int Idx,
+                        SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a VPERM W/D/Q/PS/PD mask from an IR-level vector constant.
+void DecodeVPERMVMask(const Constant *C, MVT VT,
+                      SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a VPERM W/D/Q/PS/PD mask from a raw array of constants.
+void DecodeVPERMVMask(ArrayRef<uint64_t> RawMask,
+                      SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a VPERMT2 W/D/Q/PS/PD mask from an IR-level vector constant.
+void DecodeVPERMV3Mask(const Constant *C, MVT VT,
+                      SmallVectorImpl<int> &ShuffleMask);
+
+/// \brief Decode a VPERMT2 W/D/Q/PS/PD mask from a raw array of constants.
+void DecodeVPERMV3Mask(ArrayRef<uint64_t> RawMask,
+                      SmallVectorImpl<int> &ShuffleMask);
+} // llvm namespace
+
+#endif