diff --git a/include/llvm/CodeGen/AsmPrinter.h b/include/llvm/CodeGen/AsmPrinter.h
index 59d14cc..5462212 100644
--- a/include/llvm/CodeGen/AsmPrinter.h
+++ b/include/llvm/CodeGen/AsmPrinter.h
@@ -41,6 +41,7 @@
   class MCAsmInfo;
   class MCCFIInstruction;
   class MCContext;
+  class MCInstrInfo;
   class MCSection;
   class MCStreamer;
   class MCSymbol;
@@ -64,6 +65,7 @@
     ///
     const MCAsmInfo *MAI;
 
+    const MCInstrInfo *MII;
     /// OutContext - This is the context for the output file that we are
     /// streaming.  This owns all of the global MC-related objects for the
     /// generated translation unit.
diff --git a/include/llvm/MC/MCInstrDesc.h b/include/llvm/MC/MCInstrDesc.h
index 310f706..84d6380 100644
--- a/include/llvm/MC/MCInstrDesc.h
+++ b/include/llvm/MC/MCInstrDesc.h
@@ -17,6 +17,7 @@
 
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/Support/DataTypes.h"
 
 namespace llvm {
@@ -145,6 +146,10 @@
   const uint16_t *ImplicitUses;  // Registers implicitly read by this instr
   const uint16_t *ImplicitDefs;  // Registers implicitly defined by this instr
   const MCOperandInfo *OpInfo;   // 'NumOperands' entries about operands
+  uint64_t DeprecatedFeatureMask;// Feature bits that this is deprecated on, if any
+  // A complex method to determine is a certain is deprecated or not, and return
+  // the reason for deprecation.
+  bool (*ComplexDeprecationInfo)(MCInst &, MCSubtargetInfo &, std::string &);
 
   /// \brief Returns the value of the specific constraint if
   /// it is set. Returns -1 if it is not set.
@@ -158,6 +163,20 @@
     return -1;
   }
 
+  /// \brief Returns true if a certain instruction is deprecated and if so
+  /// returns the reason in \p Info.
+  bool getDeprecatedInfo(MCInst &MI, MCSubtargetInfo &STI,
+                         std::string &Info) const {
+    if (ComplexDeprecationInfo)
+      return ComplexDeprecationInfo(MI, STI, Info);
+    if (DeprecatedFeatureMask != 0) {
+      // FIXME: it would be nice to include the subtarget feature here.
+      Info = "deprecated";
+      return true;
+    }
+    return false;
+  }
+
   /// \brief Return the opcode number for this descriptor.
   unsigned getOpcode() const {
     return Opcode;
diff --git a/include/llvm/Support/TargetRegistry.h b/include/llvm/Support/TargetRegistry.h
index 9282853..05f7cf2 100644
--- a/include/llvm/Support/TargetRegistry.h
+++ b/include/llvm/Support/TargetRegistry.h
@@ -108,7 +108,8 @@
                                                 StringRef TT,
                                                 StringRef CPU);
     typedef MCTargetAsmParser *(*MCAsmParserCtorTy)(MCSubtargetInfo &STI,
-                                                    MCAsmParser &P);
+                                                    MCAsmParser &P,
+                                                    const MCInstrInfo &MII);
     typedef MCDisassembler *(*MCDisassemblerCtorTy)(const Target &T,
                                                     const MCSubtargetInfo &STI);
     typedef MCInstPrinter *(*MCInstPrinterCtorTy)(const Target &T,
@@ -386,10 +387,11 @@
     /// \param Parser The target independent parser implementation to use for
     /// parsing and lexing.
     MCTargetAsmParser *createMCAsmParser(MCSubtargetInfo &STI,
-                                         MCAsmParser &Parser) const {
+                                         MCAsmParser &Parser,
+                                         const MCInstrInfo &MII) const {
       if (!MCAsmParserCtorFn)
         return 0;
-      return MCAsmParserCtorFn(STI, Parser);
+      return MCAsmParserCtorFn(STI, Parser, MII);
     }
 
     /// createAsmPrinter - Create a target specific assembly printer pass.  This
@@ -1142,8 +1144,9 @@
     }
 
   private:
-    static MCTargetAsmParser *Allocator(MCSubtargetInfo &STI, MCAsmParser &P) {
-      return new MCAsmParserImpl(STI, P);
+    static MCTargetAsmParser *Allocator(MCSubtargetInfo &STI, MCAsmParser &P,
+                                        const MCInstrInfo &MII) {
+      return new MCAsmParserImpl(STI, P, MII);
     }
   };
 
diff --git a/include/llvm/Target/Target.td b/include/llvm/Target/Target.td
index b7f3693..c15a4ab 100644
--- a/include/llvm/Target/Target.td
+++ b/include/llvm/Target/Target.td
@@ -1010,6 +1010,17 @@
   list<SubtargetFeature> Implies = i;
 }
 
+/// Specifies a Subtarget feature that this instruction is deprecated on.
+class Deprecated<SubtargetFeature dep> {
+  SubtargetFeature DeprecatedFeatureMask = dep;
+}
+
+/// A custom predicate used to determine if an instruction is
+/// deprecated or not.
+class ComplexDeprecationPredicate<string dep> {
+  string ComplexDeprecationPredicate = dep;
+}
+
 //===----------------------------------------------------------------------===//
 // Processor chip sets - These values represent each of the chip sets supported
 // by the scheduler.  Each Processor definition requires corresponding
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index a427c26..a4e7808 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -94,7 +94,7 @@
 
 AsmPrinter::AsmPrinter(TargetMachine &tm, MCStreamer &Streamer)
   : MachineFunctionPass(ID),
-    TM(tm), MAI(tm.getMCAsmInfo()),
+    TM(tm), MAI(tm.getMCAsmInfo()), MII(tm.getInstrInfo()),
     OutContext(Streamer.getContext()),
     OutStreamer(Streamer),
     LastMI(0), LastFn(0), Counter(~0U), SetCounter(0) {
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp b/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
index d8e9c95..4f927f6 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
@@ -123,7 +123,7 @@
                                              TM.getTargetCPU(),
                                              TM.getTargetFeatureString()));
   OwningPtr<MCTargetAsmParser>
-    TAP(TM.getTarget().createMCAsmParser(*STI, *Parser));
+    TAP(TM.getTarget().createMCAsmParser(*STI, *Parser, *MII));
   if (!TAP)
     report_fatal_error("Inline asm not supported by this streamer because"
                        " we don't have an asm parser for this target\n");
diff --git a/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index 68d4be4..f7e9c6f 100644
--- a/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -54,8 +54,9 @@
 #include "AArch64GenAsmMatcher.inc"
   };
 
-  AArch64AsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
-    : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
+  AArch64AsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser,
+                   const MCInstrInfo &MII)
+      : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
     MCAsmParserExtension::Initialize(_Parser);
 
     // Initialize the set of available features.
diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index c9bad1c..b488f26 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -1840,7 +1840,7 @@
 defm PLI  : APreLoad<1, 0, "pli">,  Requires<[IsARM,HasV7]>;
 
 def SETEND : AXI<(outs), (ins setend_op:$end), MiscFrm, NoItinerary,
-                 "setend\t$end", []>, Requires<[IsARM]> {
+                 "setend\t$end", []>, Requires<[IsARM]>, Deprecated<HasV8Ops> {
   bits<1> end;
   let Inst{31-10} = 0b1111000100000001000000;
   let Inst{9} = end;
@@ -4772,7 +4772,8 @@
                     (ins p_imm:$cop, imm0_7:$opc1, GPR:$Rt, c_imm:$CRn,
                          c_imm:$CRm, imm0_7:$opc2),
                     [(int_arm_mcr imm:$cop, imm:$opc1, GPR:$Rt, imm:$CRn,
-                                  imm:$CRm, imm:$opc2)]>;
+                                  imm:$CRm, imm:$opc2)]>,
+                    ComplexDeprecationPredicate<"MCR">;
 def : ARMInstAlias<"mcr${p} $cop, $opc1, $Rt, $CRn, $CRm",
                    (MCR p_imm:$cop, imm0_7:$opc1, GPR:$Rt, c_imm:$CRn,
                         c_imm:$CRm, 0, pred:$p)>;
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index cfa24f9..032e744 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -24,6 +24,7 @@
 #include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCInstrDesc.h"
+#include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCParser/MCAsmLexer.h"
 #include "llvm/MC/MCParser/MCAsmParser.h"
 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
@@ -47,6 +48,7 @@
 class ARMAsmParser : public MCTargetAsmParser {
   MCSubtargetInfo &STI;
   MCAsmParser &Parser;
+  const MCInstrInfo &MII;
   const MCRegisterInfo *MRI;
 
   // Unwind directives state
@@ -232,8 +234,6 @@
                               SmallVectorImpl<MCParsedAsmOperand*> &Operands);
   bool shouldOmitPredicateOperand(StringRef Mnemonic,
                               SmallVectorImpl<MCParsedAsmOperand*> &Operands);
-  bool isDeprecated(MCInst &Inst, StringRef &Info);
-
 public:
   enum ARMMatchResultTy {
     Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
@@ -245,8 +245,9 @@
 
   };
 
-  ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
-    : MCTargetAsmParser(), STI(_STI), Parser(_Parser), FPReg(-1) {
+  ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser,
+               const MCInstrInfo &MII)
+      : MCTargetAsmParser(), STI(_STI), Parser(_Parser), MII(MII), FPReg(-1) {
     MCAsmParserExtension::Initialize(_Parser);
 
     // Cache the MCRegisterInfo.
@@ -4972,14 +4973,6 @@
   return false;
 }
 
-bool ARMAsmParser::isDeprecated(MCInst &Inst, StringRef &Info) {
-  if (hasV8Ops() && Inst.getOpcode() == ARM::SETEND) {
-    Info = "armv8";
-    return true;
-  }
-  return false;
-}
-
 static bool isDataTypeToken(StringRef Tok) {
   return Tok == ".8" || Tok == ".16" || Tok == ".32" || Tok == ".64" ||
     Tok == ".i8" || Tok == ".i16" || Tok == ".i32" || Tok == ".i64" ||
@@ -5296,16 +5289,6 @@
   return false;
 }
 
-// FIXME: We would really prefer to have MCInstrInfo (the wrapper around
-// the ARMInsts array) instead. Getting that here requires awkward
-// API changes, though. Better way?
-namespace llvm {
-extern const MCInstrDesc ARMInsts[];
-}
-static const MCInstrDesc &getInstDesc(unsigned Opcode) {
-  return ARMInsts[Opcode];
-}
-
 // Return true if instruction has the interesting property of being
 // allowed in IT blocks, but not being predicable.
 static bool instIsBreakpoint(const MCInst &Inst) {
@@ -5320,7 +5303,7 @@
 bool ARMAsmParser::
 validateInstruction(MCInst &Inst,
                     const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
-  const MCInstrDesc &MCID = getInstDesc(Inst.getOpcode());
+  const MCInstrDesc &MCID = MII.get(Inst.getOpcode());
   SMLoc Loc = Operands[0]->getStartLoc();
 
   // Check the IT block state first.
@@ -5513,10 +5496,6 @@
   }
   }
 
-  StringRef DepInfo;
-  if (isDeprecated(Inst, DepInfo))
-    Warning(Loc, "deprecated on " + DepInfo);
-
   return false;
 }
 
@@ -7553,7 +7532,7 @@
   // 16-bit thumb arithmetic instructions either require or preclude the 'S'
   // suffix depending on whether they're in an IT block or not.
   unsigned Opc = Inst.getOpcode();
-  const MCInstrDesc &MCID = getInstDesc(Opc);
+  const MCInstrDesc &MCID = MII.get(Opc);
   if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
     assert(MCID.hasOptionalDef() &&
            "optionally flag setting instruction missing optional def operand");
diff --git a/lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp b/lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
index caa1949..ea5d7ba 100644
--- a/lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
+++ b/lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
@@ -26,16 +26,32 @@
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/TargetRegistry.h"
 
+using namespace llvm;
+
 #define GET_REGINFO_MC_DESC
 #include "ARMGenRegisterInfo.inc"
 
+static bool getMCRDeprecationInfo(MCInst &MI, MCSubtargetInfo &STI,
+                                  std::string &Info) {
+  // Checks for the deprecated CP15ISB encoding:
+  // mcr pX, #0, rX, c7, c5, #4
+  if (STI.getFeatureBits() & llvm::ARM::HasV8Ops &&
+      (MI.getOperand(1).isImm() && MI.getOperand(1).getImm() == 0) &&
+      (MI.getOperand(3).isImm() && MI.getOperand(3).getImm() == 7) &&
+      (MI.getOperand(4).isImm() && MI.getOperand(4).getImm() == 5) &&
+      (MI.getOperand(5).isImm() && MI.getOperand(5).getImm() == 4)) {
+    Info = "deprecated on armv8";
+    return true;
+  }
+  return false;
+}
+
 #define GET_INSTRINFO_MC_DESC
 #include "ARMGenInstrInfo.inc"
 
 #define GET_SUBTARGETINFO_MC_DESC
 #include "ARMGenSubtargetInfo.inc"
 
-using namespace llvm;
 
 std::string ARM_MC::ParseARMTriple(StringRef TT, StringRef CPU) {
   Triple triple(TT);
diff --git a/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index e547de5..c4ce4ff 100644
--- a/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -24,6 +24,10 @@
 
 using namespace llvm;
 
+namespace llvm {
+class MCInstrInfo;
+}
+
 namespace {
 class MipsAssemblerOptions {
 public:
@@ -201,8 +205,10 @@
   bool processInstruction(MCInst &Inst, SMLoc IDLoc,
                         SmallVectorImpl<MCInst> &Instructions);
 public:
-  MipsAsmParser(MCSubtargetInfo &sti, MCAsmParser &parser)
-    : MCTargetAsmParser(), STI(sti), Parser(parser), hasConsumedDollar(false) {
+  MipsAsmParser(MCSubtargetInfo &sti, MCAsmParser &parser,
+                const MCInstrInfo &MII)
+      : MCTargetAsmParser(), STI(sti), Parser(parser),
+        hasConsumedDollar(false) {
     // Initialize the set of available features.
     setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
   }
diff --git a/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp b/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
index bfa9bb7..4827c8f 100644
--- a/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
+++ b/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
@@ -218,8 +218,9 @@
 
 
 public:
-  PPCAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
-    : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
+  PPCAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser,
+               const MCInstrInfo &MII)
+      : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
     // Check for 64-bit vs. 32-bit pointer mode.
     Triple TheTriple(STI.getTargetTriple());
     IsPPC64 = (TheTriple.getArch() == Triple::ppc64 ||
diff --git a/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp b/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp
index 58af2c4..3551b2d 100644
--- a/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp
+++ b/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp
@@ -327,8 +327,9 @@
                     StringRef Mnemonic);
 
 public:
-  SystemZAsmParser(MCSubtargetInfo &sti, MCAsmParser &parser)
-    : MCTargetAsmParser(), STI(sti), Parser(parser) {
+  SystemZAsmParser(MCSubtargetInfo &sti, MCAsmParser &parser,
+                   const MCInstrInfo &MII)
+      : MCTargetAsmParser(), STI(sti), Parser(parser) {
     MCAsmParserExtension::Initialize(Parser);
 
     // Initialize the set of available features.
diff --git a/lib/Target/X86/AsmParser/X86AsmParser.cpp b/lib/Target/X86/AsmParser/X86AsmParser.cpp
index 3d56acf..93c2169 100644
--- a/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ b/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -556,8 +556,9 @@
   /// }
 
 public:
-  X86AsmParser(MCSubtargetInfo &sti, MCAsmParser &parser)
-    : MCTargetAsmParser(), STI(sti), Parser(parser), InstInfo(0) {
+  X86AsmParser(MCSubtargetInfo &sti, MCAsmParser &parser,
+               const MCInstrInfo &MII)
+      : MCTargetAsmParser(), STI(sti), Parser(parser), InstInfo(0) {
 
     // Initialize the set of available features.
     setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
diff --git a/test/MC/ARM/deprecated-v8.s b/test/MC/ARM/deprecated-v8.s
index e509a35..b365cd1 100644
--- a/test/MC/ARM/deprecated-v8.s
+++ b/test/MC/ARM/deprecated-v8.s
@@ -1,3 +1,5 @@
 @ RUN: llvm-mc -triple armv8 -show-encoding < %s 2>&1 | FileCheck %s
 setend be
+@ CHECK: warning: deprecated
+mcr p8, #0, r5, c7, c5, #4
 @ CHECK: warning: deprecated on armv8
diff --git a/tools/llvm-mc/llvm-mc.cpp b/tools/llvm-mc/llvm-mc.cpp
index 4828737..7ec2bba 100644
--- a/tools/llvm-mc/llvm-mc.cpp
+++ b/tools/llvm-mc/llvm-mc.cpp
@@ -319,10 +319,10 @@
 
 static int AssembleInput(const char *ProgName, const Target *TheTarget, 
                          SourceMgr &SrcMgr, MCContext &Ctx, MCStreamer &Str,
-                         MCAsmInfo &MAI, MCSubtargetInfo &STI) {
+                         MCAsmInfo &MAI, MCSubtargetInfo &STI, MCInstrInfo &MCII) {
   OwningPtr<MCAsmParser> Parser(createMCAsmParser(SrcMgr, Ctx,
                                                   Str, MAI));
-  OwningPtr<MCTargetAsmParser> TAP(TheTarget->createMCAsmParser(STI, *Parser));
+  OwningPtr<MCTargetAsmParser> TAP(TheTarget->createMCAsmParser(STI, *Parser, MCII));
   if (!TAP) {
     errs() << ProgName
            << ": error: this target does not support assembly parsing.\n";
@@ -459,7 +459,7 @@
     Res = AsLexInput(SrcMgr, *MAI, Out.get());
     break;
   case AC_Assemble:
-    Res = AssembleInput(ProgName, TheTarget, SrcMgr, Ctx, *Str, *MAI, *STI);
+    Res = AssembleInput(ProgName, TheTarget, SrcMgr, Ctx, *Str, *MAI, *STI, *MCII);
     break;
   case AC_MDisassemble:
     assert(IP && "Expected assembly output");
diff --git a/utils/TableGen/AsmMatcherEmitter.cpp b/utils/TableGen/AsmMatcherEmitter.cpp
index 31c17fb..c827525 100644
--- a/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/utils/TableGen/AsmMatcherEmitter.cpp
@@ -430,6 +430,9 @@
   /// function.
   std::string ConversionFnKind;
 
+  /// If this instruction is deprecated in some form.
+  bool HasDeprecation;
+
   MatchableInfo(const CodeGenInstruction &CGI)
     : AsmVariantID(0), TheDef(CGI.TheDef), DefRec(&CGI),
       AsmString(CGI.AsmString) {
@@ -779,6 +782,13 @@
     if (Record *Reg = AsmOperands[i].SingletonReg)
       SingletonRegisters.insert(Reg);
   }
+
+  const RecordVal *DepMask = TheDef->getValue("DeprecatedFeatureMask");
+  if (!DepMask)
+    DepMask = TheDef->getValue("ComplexDeprecationPredicate");
+
+  HasDeprecation =
+      DepMask ? !DepMask->getValue()->getAsUnquotedString().empty() : false;
 }
 
 /// tokenizeAsmString - Tokenize a simplified assembly string.
@@ -2743,11 +2753,13 @@
 
   size_t MaxNumOperands = 0;
   unsigned MaxMnemonicIndex = 0;
+  bool HasDeprecation = false;
   for (std::vector<MatchableInfo*>::const_iterator it =
          Info.Matchables.begin(), ie = Info.Matchables.end();
        it != ie; ++it) {
     MatchableInfo &II = **it;
     MaxNumOperands = std::max(MaxNumOperands, II.AsmOperands.size());
+    HasDeprecation |= II.HasDeprecation;
 
     // Store a pascal-style length byte in the mnemonic.
     std::string LenMnemonic = char(II.Mnemonic.size()) + II.Mnemonic.str();
@@ -3018,6 +3030,14 @@
   if (!InsnCleanupFn.empty())
     OS << "    " << InsnCleanupFn << "(Inst);\n";
 
+  if (HasDeprecation) {
+    OS << "    std::string Info;\n";
+    OS << "    if (MII.get(Inst.getOpcode()).getDeprecatedInfo(Inst, STI, Info)) {\n";
+    OS << "      SMLoc Loc = ((" << Target.getName() << "Operand*)Operands[0])->getStartLoc();\n";
+    OS << "      Parser.Warning(Loc, Info, None);\n";
+    OS << "    }\n";
+  }
+
   OS << "    return Match_Success;\n";
   OS << "  }\n\n";
 
diff --git a/utils/TableGen/CodeGenInstruction.cpp b/utils/TableGen/CodeGenInstruction.cpp
index bf59d3a..576388b 100644
--- a/utils/TableGen/CodeGenInstruction.cpp
+++ b/utils/TableGen/CodeGenInstruction.cpp
@@ -337,6 +337,20 @@
 
   // Parse the DisableEncoding field.
   Operands.ProcessDisableEncoding(R->getValueAsString("DisableEncoding"));
+
+  // First check for a ComplexDeprecationPredicate.
+  if (R->getValue("ComplexDeprecationPredicate")) {
+    HasComplexDeprecationPredicate = true;
+    DeprecatedReason = R->getValueAsString("ComplexDeprecationPredicate");
+  } else if (RecordVal *Dep = R->getValue("DeprecatedFeatureMask")) {
+    // Check if we have a Subtarget feature mask.
+    HasComplexDeprecationPredicate = false;
+    DeprecatedReason = Dep->getValue()->getAsString();
+  } else {
+    // This instruction isn't deprecated.
+    HasComplexDeprecationPredicate = false;
+    DeprecatedReason = "";
+  }
 }
 
 /// HasOneImplicitDefWithKnownVT - If the instruction has at least one
diff --git a/utils/TableGen/CodeGenInstruction.h b/utils/TableGen/CodeGenInstruction.h
index d1e1153..6004f66 100644
--- a/utils/TableGen/CodeGenInstruction.h
+++ b/utils/TableGen/CodeGenInstruction.h
@@ -248,6 +248,9 @@
     bool isCodeGenOnly;
     bool isPseudo;
 
+    std::string DeprecatedReason;
+    bool HasComplexDeprecationPredicate;
+
     /// Are there any undefined flags?
     bool hasUndefFlags() const {
       return mayLoad_Unset || mayStore_Unset || hasSideEffects_Unset;
diff --git a/utils/TableGen/InstrInfoEmitter.cpp b/utils/TableGen/InstrInfoEmitter.cpp
index 84bd4de..af26353 100644
--- a/utils/TableGen/InstrInfoEmitter.cpp
+++ b/utils/TableGen/InstrInfoEmitter.cpp
@@ -514,6 +514,19 @@
   else
     OS << "OperandInfo" << OpInfo.find(OperandInfo)->second;
 
+  CodeGenTarget &Target = CDP.getTargetInfo();
+  if (Inst.HasComplexDeprecationPredicate)
+    // Emit a function pointer to the complex predicate method.
+    OS << ",0"
+       << ",&get" << Inst.DeprecatedReason << "DeprecationInfo";
+  else if (!Inst.DeprecatedReason.empty())
+    // Emit the Subtarget feature.
+    OS << "," << Target.getInstNamespace() << "::" << Inst.DeprecatedReason
+       << ",0";
+  else
+    // Instruction isn't deprecated.
+    OS << ",0,0";
+
   OS << " },  // Inst #" << Num << " = " << Inst.TheDef->getName() << "\n";
 }