diff --git a/lib/Target/AArch64/AArch64.td b/lib/Target/AArch64/AArch64.td
index e82cdd00ba1..5c19b3efdb1 100644
--- a/lib/Target/AArch64/AArch64.td
+++ b/lib/Target/AArch64/AArch64.td
@@ -38,6 +38,9 @@ def FeaturePerfMon : SubtargetFeature<"perfmon", "HasPerfMon", "true",
 def FeatureFullFP16 : SubtargetFeature<"fullfp16", "HasFullFP16", "true",
   "Full FP16", [FeatureFPARMv8]>;
 
+def FeatureSPE : SubtargetFeature<"spe", "HasSPE", "true",
+  "Enable Statistical Profiling extension">;
+
 /// Cyclone has register move instructions which are "free".
 def FeatureZCRegMove : SubtargetFeature<"zcm", "HasZeroCycleRegMove", "true",
                                         "Has zero-cycle register moves">;
diff --git a/lib/Target/AArch64/AArch64InstrFormats.td b/lib/Target/AArch64/AArch64InstrFormats.td
index 752a153c057..5eef82153e3 100644
--- a/lib/Target/AArch64/AArch64InstrFormats.td
+++ b/lib/Target/AArch64/AArch64InstrFormats.td
@@ -911,6 +911,25 @@ def msr_sysreg_op : Operand<i32> {
   let PrintMethod = "printMSRSystemRegister";
 }
 
+def PSBHintOperand : AsmOperandClass {
+  let Name = "PSBHint";
+  let ParserMethod = "tryParsePSBHint";
+}
+def psbhint_op : Operand<i32> {
+  let ParserMatchClass = PSBHintOperand;
+  let PrintMethod = "printPSBHintOp";
+  let MCOperandPredicate = [{
+    // Check, if operand is valid, to fix exhaustive aliasing in disassembly.
+    // "psb" is an alias to "hint" only for certain values of CRm:Op2 fields.
+    if (!MCOp.isImm())
+      return false;
+    bool ValidNamed;
+    (void)AArch64PSBHint::PSBHintMapper().toString(MCOp.getImm(),
+      STI.getFeatureBits(), ValidNamed);
+    return ValidNamed;
+  }];
+}
+
 class MRSI : RtSystemI<1, (outs GPR64:$Rt), (ins mrs_sysreg_op:$systemreg),
                        "mrs", "\t$Rt, $systemreg"> {
   bits<16> systemreg;
diff --git a/lib/Target/AArch64/AArch64InstrInfo.td b/lib/Target/AArch64/AArch64InstrInfo.td
index 0c43003975c..881f55ebeef 100644
--- a/lib/Target/AArch64/AArch64InstrInfo.td
+++ b/lib/Target/AArch64/AArch64InstrInfo.td
@@ -29,6 +29,8 @@ def HasCRC           : Predicate<"Subtarget->hasCRC()">,
 def HasPerfMon       : Predicate<"Subtarget->hasPerfMon()">;
 def HasFullFP16      : Predicate<"Subtarget->hasFullFP16()">,
                                  AssemblerPredicate<"FeatureFullFP16", "fullfp16">;
+def HasSPE           : Predicate<"Subtarget->hasSPE()">,
+                                 AssemblerPredicate<"FeatureSPE", "spe">;
 
 def IsLE             : Predicate<"Subtarget->isLittleEndian()">;
 def IsBE             : Predicate<"!Subtarget->isLittleEndian()">;
@@ -382,6 +384,9 @@ def : InstAlias<"wfi",  (HINT 0b011)>;
 def : InstAlias<"sev",  (HINT 0b100)>;
 def : InstAlias<"sevl", (HINT 0b101)>;
 
+// v8.2a Statistical Profiling extension
+def : InstAlias<"psb $op",  (HINT psbhint_op:$op)>, Requires<[HasSPE]>;
+
 // As far as LLVM is concerned this writes to the system's exclusive monitors.
 let mayLoad = 1, mayStore = 1 in
 def CLREX : CRmSystemI<imm0_15, 0b010, "clrex">;
diff --git a/lib/Target/AArch64/AArch64Subtarget.h b/lib/Target/AArch64/AArch64Subtarget.h
index 9aa6ef9ab67..73daf6051b7 100644
--- a/lib/Target/AArch64/AArch64Subtarget.h
+++ b/lib/Target/AArch64/AArch64Subtarget.h
@@ -47,6 +47,7 @@ protected:
   bool HasCRC;
   bool HasPerfMon;
   bool HasFullFP16;
+  bool HasSPE;
 
   // HasZeroCycleRegMove - Has zero-cycle register mov instructions.
   bool HasZeroCycleRegMove;
@@ -124,6 +125,7 @@ public:
 
   bool hasPerfMon() const { return HasPerfMon; }
   bool hasFullFP16() const { return HasFullFP16; }
+  bool hasSPE() const { return HasSPE; }
 
   bool isLittleEndian() const { return IsLittle; }
 
diff --git a/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index 165843fc84c..f0ad855ed5e 100644
--- a/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -100,6 +100,7 @@ private:
   OperandMatchResultTy tryParseSysReg(OperandVector &Operands);
   OperandMatchResultTy tryParseSysCROperand(OperandVector &Operands);
   OperandMatchResultTy tryParsePrefetch(OperandVector &Operands);
+  OperandMatchResultTy tryParsePSBHint(OperandVector &Operands);
   OperandMatchResultTy tryParseAdrpLabel(OperandVector &Operands);
   OperandMatchResultTy tryParseAdrLabel(OperandVector &Operands);
   OperandMatchResultTy tryParseFPImm(OperandVector &Operands);
@@ -159,7 +160,8 @@ private:
     k_Prefetch,
     k_ShiftExtend,
     k_FPImm,
-    k_Barrier
+    k_Barrier,
+    k_PSBHint,
   } Kind;
 
   SMLoc StartLoc, EndLoc;
@@ -227,6 +229,12 @@ private:
     unsigned Length;
   };
 
+  struct PSBHintOp {
+    unsigned Val;
+    const char *Data;
+    unsigned Length;
+  };
+
   struct ShiftExtendOp {
     AArch64_AM::ShiftExtendType Type;
     unsigned Amount;
@@ -250,6 +258,7 @@ private:
     struct SysRegOp SysReg;
     struct SysCRImmOp SysCRImm;
     struct PrefetchOp Prefetch;
+    struct PSBHintOp PSBHint;
     struct ShiftExtendOp ShiftExtend;
   };
 
@@ -301,6 +310,9 @@ public:
     case k_Prefetch:
       Prefetch = o.Prefetch;
       break;
+    case k_PSBHint:
+      PSBHint = o.PSBHint;
+      break;
     case k_ShiftExtend:
       ShiftExtend = o.ShiftExtend;
       break;
@@ -392,6 +404,16 @@ public:
     return Prefetch.Val;
   }
 
+  unsigned getPSBHint() const {
+    assert(Kind == k_PSBHint && "Invalid access!");
+    return PSBHint.Val;
+  }
+
+  StringRef getPSBHintName() const {
+    assert(Kind == k_PSBHint && "Invalid access!");
+    return StringRef(PSBHint.Data, PSBHint.Length);
+  }
+
   StringRef getPrefetchName() const {
     assert(Kind == k_Prefetch && "Invalid access!");
     return StringRef(Prefetch.Data, Prefetch.Length);
@@ -961,6 +983,7 @@ public:
   }
   bool isSysCR() const { return Kind == k_SysCR; }
   bool isPrefetch() const { return Kind == k_Prefetch; }
+  bool isPSBHint() const { return Kind == k_PSBHint; }
   bool isShiftExtend() const { return Kind == k_ShiftExtend; }
   bool isShifter() const {
     if (!isShiftExtend())
@@ -1534,6 +1557,11 @@ public:
     Inst.addOperand(MCOperand::createImm(getPrefetch()));
   }
 
+  void addPSBHintOperands(MCInst &Inst, unsigned N) const {
+    assert(N == 1 && "Invalid number of operands!");
+    Inst.addOperand(MCOperand::createImm(getPSBHint()));
+  }
+
   void addShifterOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     unsigned Imm =
@@ -1730,6 +1758,19 @@ public:
     return Op;
   }
 
+  static std::unique_ptr<AArch64Operand> CreatePSBHint(unsigned Val,
+                                                       StringRef Str,
+                                                       SMLoc S,
+                                                       MCContext &Ctx) {
+    auto Op = make_unique<AArch64Operand>(k_PSBHint, Ctx);
+    Op->PSBHint.Val = Val;
+    Op->PSBHint.Data = Str.data();
+    Op->PSBHint.Length = Str.size();
+    Op->StartLoc = S;
+    Op->EndLoc = S;
+    return Op;
+  }
+
   static std::unique_ptr<AArch64Operand>
   CreateShiftExtend(AArch64_AM::ShiftExtendType ShOp, unsigned Val,
                     bool HasExplicitAmount, SMLoc S, SMLoc E, MCContext &Ctx) {
@@ -1803,6 +1844,10 @@ void AArch64Operand::print(raw_ostream &OS) const {
       OS << "<prfop invalid #" << getPrefetch() << ">";
     break;
   }
+  case k_PSBHint: {
+    OS << getPSBHintName();
+    break;
+  }
   case k_ShiftExtend: {
     OS << "<" << AArch64_AM::getShiftExtendName(getShiftExtendType()) << " #"
        << getShiftExtendAmount();
@@ -2069,6 +2114,32 @@ AArch64AsmParser::tryParsePrefetch(OperandVector &Operands) {
   return MatchOperand_Success;
 }
 
+/// tryParsePSBHint - Try to parse a PSB operand, mapped to Hint command
+AArch64AsmParser::OperandMatchResultTy
+AArch64AsmParser::tryParsePSBHint(OperandVector &Operands) {
+  MCAsmParser &Parser = getParser();
+  SMLoc S = getLoc();
+  const AsmToken &Tok = Parser.getTok();
+  if (Tok.isNot(AsmToken::Identifier)) {
+    TokError("invalid operand for instruction");
+    return MatchOperand_ParseFail;
+  }
+
+  bool Valid;
+  auto Mapper = AArch64PSBHint::PSBHintMapper();
+  unsigned psbhint =
+      Mapper.fromString(Tok.getString(), getSTI().getFeatureBits(), Valid);
+  if (!Valid) {
+    TokError("invalid operand for instruction");
+    return MatchOperand_ParseFail;
+  }
+
+  Parser.Lex(); // Eat identifier token.
+  Operands.push_back(AArch64Operand::CreatePSBHint(psbhint, Tok.getString(),
+                                                   S, getContext()));
+  return MatchOperand_Success;
+}
+
 /// tryParseAdrpLabel - Parse and validate a source label for the ADRP
 /// instruction.
 AArch64AsmParser::OperandMatchResultTy
diff --git a/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.cpp b/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.cpp
index d8937b57e49..480ed0d263a 100644
--- a/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.cpp
+++ b/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.cpp
@@ -1144,6 +1144,19 @@ void AArch64InstPrinter::printPrefetchOp(const MCInst *MI, unsigned OpNum,
     O << '#' << prfop;
 }
 
+void AArch64InstPrinter::printPSBHintOp(const MCInst *MI, unsigned OpNum,
+                                        const MCSubtargetInfo &STI,
+                                        raw_ostream &O) {
+  unsigned psbhintop = MI->getOperand(OpNum).getImm();
+  bool Valid;
+  StringRef Name =
+      AArch64PSBHint::PSBHintMapper().toString(psbhintop, STI.getFeatureBits(), Valid);
+  if (Valid)
+    O << Name;
+  else
+    O << '#' << psbhintop;
+}
+
 void AArch64InstPrinter::printFPImmOperand(const MCInst *MI, unsigned OpNum,
                                            const MCSubtargetInfo &STI,
                                            raw_ostream &O) {
diff --git a/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.h b/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.h
index a94721816d3..a767aa451c6 100644
--- a/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.h
+++ b/lib/Target/AArch64/InstPrinter/AArch64InstPrinter.h
@@ -123,6 +123,9 @@ protected:
   void printPrefetchOp(const MCInst *MI, unsigned OpNum,
                        const MCSubtargetInfo &STI, raw_ostream &O);
 
+  void printPSBHintOp(const MCInst *MI, unsigned OpNum,
+                      const MCSubtargetInfo &STI, raw_ostream &O);
+
   void printFPImmOperand(const MCInst *MI, unsigned OpNum,
                          const MCSubtargetInfo &STI, raw_ostream &O);
 
diff --git a/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp b/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp
index f657eaab815..78f5289ec26 100644
--- a/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp
+++ b/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp
@@ -154,6 +154,14 @@ const AArch64NamedImmMapper::Mapping AArch64PState::PStateMapper::PStateMappings
 AArch64PState::PStateMapper::PStateMapper()
   : AArch64NamedImmMapper(PStateMappings, 0) {}
 
+const AArch64NamedImmMapper::Mapping AArch64PSBHint::PSBHintMapper::PSBHintMappings[] = {
+  // v8.2a "Statistical Profiling" extension-specific PSB operand
+  {"csync", CSync, {AArch64::FeatureSPE}},
+};
+
+AArch64PSBHint::PSBHintMapper::PSBHintMapper()
+  : AArch64NamedImmMapper(PSBHintMappings, 0) {}
+
 const AArch64NamedImmMapper::Mapping AArch64SysReg::MRSMapper::MRSMappings[] = {
   {"mdccsr_el0", MDCCSR_EL0, {}},
   {"dbgdtrrx_el0", DBGDTRRX_EL0, {}},
@@ -808,6 +816,21 @@ const AArch64NamedImmMapper::Mapping AArch64SysReg::SysRegMapper::SysRegMappings
 
   // v8.2a registers
   {"uao",           UAO,           {AArch64::HasV8_2aOps}},
+
+  // v8.2a "Statistical Profiling extension" registers
+  {"pmblimitr_el1", PMBLIMITR_EL1, {AArch64::FeatureSPE}},
+  {"pmbptr_el1",    PMBPTR_EL1,    {AArch64::FeatureSPE}},
+  {"pmbsr_el1",     PMBSR_EL1,     {AArch64::FeatureSPE}},
+  {"pmbidr_el1",    PMBIDR_EL1,    {AArch64::FeatureSPE}},
+  {"pmscr_el2",     PMSCR_EL2,     {AArch64::FeatureSPE}},
+  {"pmscr_el12",    PMSCR_EL12,    {AArch64::FeatureSPE}},
+  {"pmscr_el1",     PMSCR_EL1,     {AArch64::FeatureSPE}},
+  {"pmsicr_el1",    PMSICR_EL1,    {AArch64::FeatureSPE}},
+  {"pmsirr_el1",    PMSIRR_EL1,    {AArch64::FeatureSPE}},
+  {"pmsfcr_el1",    PMSFCR_EL1,    {AArch64::FeatureSPE}},
+  {"pmsevfr_el1",   PMSEVFR_EL1,   {AArch64::FeatureSPE}},
+  {"pmslatfr_el1",  PMSLATFR_EL1,  {AArch64::FeatureSPE}},
+  {"pmsidr_el1",    PMSIDR_EL1,    {AArch64::FeatureSPE}},
 };
 
 uint32_t
diff --git a/lib/Target/AArch64/Utils/AArch64BaseInfo.h b/lib/Target/AArch64/Utils/AArch64BaseInfo.h
index 5a6b54bbee8..f649cb9b8a8 100644
--- a/lib/Target/AArch64/Utils/AArch64BaseInfo.h
+++ b/lib/Target/AArch64/Utils/AArch64BaseInfo.h
@@ -478,6 +478,21 @@ namespace AArch64PState {
 
 }
 
+namespace AArch64PSBHint {
+  enum PSBHintValues {
+    Invalid = -1,
+    // v8.2a "Statistical Profiling" extension-specific PSB operands
+    CSync = 0x11,  // psb csync = hint #0x11
+  };
+
+  struct PSBHintMapper : AArch64NamedImmMapper {
+    const static Mapping PSBHintMappings[];
+
+    PSBHintMapper();
+  };
+
+}
+
 namespace AArch64SE {
     enum ShiftExtSpecifiers {
         Invalid = -1,
@@ -1199,6 +1214,21 @@ namespace AArch64SysReg {
     // v8.2a registers
     UAO               = 0xc214, // 11  000  0100  0010  100
 
+    // v8.2a "Statistical Profiling extension" registers
+    PMBLIMITR_EL1     = 0xc4d0, // 11  000  1001  1010  000
+    PMBPTR_EL1        = 0xc4d1, // 11  000  1001  1010  001
+    PMBSR_EL1         = 0xc4d3, // 11  000  1001  1010  011
+    PMBIDR_EL1        = 0xc4d7, // 11  000  1001  1010  111
+    PMSCR_EL2         = 0xe4c8, // 11  100  1001  1001  000
+    PMSCR_EL12        = 0xecc8, // 11  101  1001  1001  000
+    PMSCR_EL1         = 0xc4c8, // 11  000  1001  1001  000
+    PMSICR_EL1        = 0xc4ca, // 11  000  1001  1001  010
+    PMSIRR_EL1        = 0xc4cb, // 11  000  1001  1001  011
+    PMSFCR_EL1        = 0xc4cc, // 11  000  1001  1001  100
+    PMSEVFR_EL1       = 0xc4cd, // 11  000  1001  1001  101
+    PMSLATFR_EL1      = 0xc4ce, // 11  000  1001  1001  110
+    PMSIDR_EL1        = 0xc4cf, // 11  000  1001  1001  111
+
     // Cyclone specific system registers
     CPM_IOACC_CTL_EL3 = 0xff90,
   };
diff --git a/test/MC/AArch64/armv8.2a-statistical-profiling.s b/test/MC/AArch64/armv8.2a-statistical-profiling.s
new file mode 100644
index 00000000000..5cb10931878
--- /dev/null
+++ b/test/MC/AArch64/armv8.2a-statistical-profiling.s
@@ -0,0 +1,87 @@
+// RUN: llvm-mc -triple aarch64-none-linux-gnu -show-encoding -mattr=+spe < %s | FileCheck %s
+// RUN: not llvm-mc -triple aarch64-none-linux-gnu -show-encoding < %s 2>&1 | FileCheck --check-prefix=NO_SPE %s
+
+  psb csync
+// CHECK: psb csync              // encoding: [0x3f,0x22,0x03,0xd5]
+// NO_SPE:  invalid operand for instruction
+
+  msr pmblimitr_el1, x0
+  msr pmbptr_el1, x0
+  msr pmbsr_el1, x0
+  msr pmbidr_el1, x0
+  msr pmscr_el2, x0
+  msr pmscr_el12, x0
+  msr pmscr_el1, x0
+  msr pmsicr_el1, x0
+  msr pmsirr_el1, x0
+  msr pmsfcr_el1, x0
+  msr pmsevfr_el1, x0
+  msr pmslatfr_el1, x0
+  msr pmsidr_el1, x0
+// CHECK:     msr PMBLIMITR_EL1, x0       // encoding: [0x00,0x9a,0x18,0xd5]
+// CHECK:     msr PMBPTR_EL1, x0          // encoding: [0x20,0x9a,0x18,0xd5]
+// CHECK:     msr PMBSR_EL1, x0           // encoding: [0x60,0x9a,0x18,0xd5]
+// CHECK:     msr PMBIDR_EL1, x0          // encoding: [0xe0,0x9a,0x18,0xd5]
+// CHECK:     msr PMSCR_EL2, x0           // encoding: [0x00,0x99,0x1c,0xd5]
+// CHECK:     msr PMSCR_EL12, x0          // encoding: [0x00,0x99,0x1d,0xd5]
+// CHECK:     msr PMSCR_EL1, x0           // encoding: [0x00,0x99,0x18,0xd5]
+// CHECK:     msr PMSICR_EL1, x0          // encoding: [0x40,0x99,0x18,0xd5]
+// CHECK:     msr PMSIRR_EL1, x0          // encoding: [0x60,0x99,0x18,0xd5]
+// CHECK:     msr PMSFCR_EL1, x0          // encoding: [0x80,0x99,0x18,0xd5]
+// CHECK:     msr PMSEVFR_EL1, x0         // encoding: [0xa0,0x99,0x18,0xd5]
+// CHECK:     msr PMSLATFR_EL1, x0        // encoding: [0xc0,0x99,0x18,0xd5]
+// CHECK:     msr PMSIDR_EL1, x0          // encoding: [0xe0,0x99,0x18,0xd5]
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+// NO_SPE: error: expected writable system register or pstate
+
+mrs x0, pmblimitr_el1
+  mrs x0, pmbptr_el1
+  mrs x0, pmbsr_el1
+  mrs x0, pmbidr_el1
+  mrs x0, pmscr_el2
+  mrs x0, pmscr_el12
+  mrs x0, pmscr_el1
+  mrs x0, pmsicr_el1
+  mrs x0, pmsirr_el1
+  mrs x0, pmsfcr_el1
+  mrs x0, pmsevfr_el1
+  mrs x0, pmslatfr_el1
+  mrs x0, pmsidr_el1
+
+// CHECK:    mrs x0, PMBLIMITR_EL1       // encoding: [0x00,0x9a,0x38,0xd5]
+// CHECK:    mrs x0, PMBPTR_EL1          // encoding: [0x20,0x9a,0x38,0xd5]
+// CHECK:    mrs x0, PMBSR_EL1           // encoding: [0x60,0x9a,0x38,0xd5]
+// CHECK:    mrs x0, PMBIDR_EL1          // encoding: [0xe0,0x9a,0x38,0xd5]
+// CHECK:    mrs x0, PMSCR_EL2           // encoding: [0x00,0x99,0x3c,0xd5]
+// CHECK:    mrs x0, PMSCR_EL12          // encoding: [0x00,0x99,0x3d,0xd5]
+// CHECK:    mrs x0, PMSCR_EL1           // encoding: [0x00,0x99,0x38,0xd5]
+// CHECK:    mrs x0, PMSICR_EL1          // encoding: [0x40,0x99,0x38,0xd5]
+// CHECK:    mrs x0, PMSIRR_EL1          // encoding: [0x60,0x99,0x38,0xd5]
+// CHECK:    mrs x0, PMSFCR_EL1          // encoding: [0x80,0x99,0x38,0xd5]
+// CHECK:    mrs x0, PMSEVFR_EL1         // encoding: [0xa0,0x99,0x38,0xd5]
+// CHECK:    mrs x0, PMSLATFR_EL1        // encoding: [0xc0,0x99,0x38,0xd5]
+// CHECK:    mrs x0, PMSIDR_EL1          // encoding: [0xe0,0x99,0x38,0xd5]
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
+// NO_SPE: error: expected readable system register
diff --git a/test/MC/Disassembler/AArch64/armv8.2a-statistical-profiling.txt b/test/MC/Disassembler/AArch64/armv8.2a-statistical-profiling.txt
new file mode 100644
index 00000000000..e83d750e715
--- /dev/null
+++ b/test/MC/Disassembler/AArch64/armv8.2a-statistical-profiling.txt
@@ -0,0 +1,91 @@
+# RUN: llvm-mc -triple aarch64-none-linux-gnu -mattr=+spe --disassemble < %s | FileCheck %s
+# RUN: llvm-mc -triple aarch64-none-linux-gnu --disassemble < %s | FileCheck --check-prefix=NO_SPE %s
+
+[0x1f,0x22,0x03,0xd5]
+# CHECK: hint #0x10
+# NO_SPE: hint #0x10
+
+[0x3f,0x22,0x03,0xd5]
+# CHECK: psb csync
+# NO_SPE: hint #0x11
+
+[0x00,0x9a,0x18,0xd5]
+[0x20,0x9a,0x18,0xd5]
+[0x60,0x9a,0x18,0xd5]
+[0xe0,0x9a,0x18,0xd5]
+[0x00,0x99,0x1c,0xd5]
+[0x00,0x99,0x1d,0xd5]
+[0x00,0x99,0x18,0xd5]
+[0x40,0x99,0x18,0xd5]
+[0x60,0x99,0x18,0xd5]
+[0x80,0x99,0x18,0xd5]
+[0xa0,0x99,0x18,0xd5]
+[0xc0,0x99,0x18,0xd5]
+[0xe0,0x99,0x18,0xd5]
+# CHECK: msr PMBLIMITR_EL1, x0
+# NO_SPE: msr S3_0_C9_C10_0, x0
+# CHECK: msr PMBPTR_EL1, x0
+# NO_SPE: msr S3_0_C9_C10_1, x0
+# CHECK: msr PMBSR_EL1, x0
+# NO_SPE: msr S3_0_C9_C10_3, x0
+# CHECK: msr PMBIDR_EL1, x0
+# NO_SPE: msr S3_0_C9_C10_7, x0
+# CHECK: msr PMSCR_EL2, x0
+# NO_SPE: msr S3_4_C9_C9_0, x0
+# CHECK: msr PMSCR_EL12, x0
+# NO_SPE: msr S3_5_C9_C9_0, x0
+# CHECK: msr PMSCR_EL1, x0
+# NO_SPE: msr S3_0_C9_C9_0, x0
+# CHECK: msr PMSICR_EL1, x0
+# NO_SPE: msr S3_0_C9_C9_2, x0
+# CHECK: msr PMSIRR_EL1, x0
+# NO_SPE: msr S3_0_C9_C9_3, x0
+# CHECK: msr PMSFCR_EL1, x0
+# NO_SPE: msr S3_0_C9_C9_4, x0
+# CHECK: msr PMSEVFR_EL1, x0
+# NO_SPE: msr S3_0_C9_C9_5, x0
+# CHECK: msr PMSLATFR_EL1, x0
+# NO_SPE: msr S3_0_C9_C9_6, x0
+# CHECK: msr PMSIDR_EL1, x0
+# NO_SPE: msr S3_0_C9_C9_7, x0
+
+[0x00,0x9a,0x38,0xd5]
+[0x20,0x9a,0x38,0xd5]
+[0x60,0x9a,0x38,0xd5]
+[0xe0,0x9a,0x38,0xd5]
+[0x00,0x99,0x3c,0xd5]
+[0x00,0x99,0x3d,0xd5]
+[0x00,0x99,0x38,0xd5]
+[0x40,0x99,0x38,0xd5]
+[0x60,0x99,0x38,0xd5]
+[0x80,0x99,0x38,0xd5]
+[0xa0,0x99,0x38,0xd5]
+[0xc0,0x99,0x38,0xd5]
+[0xe0,0x99,0x38,0xd5]
+
+# CHECK: mrs x0, PMBLIMITR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C10_0
+# CHECK: mrs x0, PMBPTR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C10_1
+# CHECK: mrs x0, PMBSR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C10_3
+# CHECK: mrs x0, PMBIDR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C10_7
+# CHECK: mrs x0, PMSCR_EL2
+# NO_SPE: mrs x0, S3_4_C9_C9_0
+# CHECK: mrs x0, PMSCR_EL12
+# NO_SPE: mrs x0, S3_5_C9_C9_0
+# CHECK: mrs x0, PMSCR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C9_0
+# CHECK: mrs x0, PMSICR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C9_2
+# CHECK: mrs x0, PMSIRR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C9_3
+# CHECK: mrs x0, PMSFCR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C9_4
+# CHECK: mrs x0, PMSEVFR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C9_5
+# CHECK: mrs x0, PMSLATFR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C9_6
+# CHECK: mrs x0, PMSIDR_EL1
+# NO_SPE: mrs x0, S3_0_C9_C9_7
diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp
index 4b543d3f9fc..a954998d36e 100644
--- a/utils/TableGen/AsmWriterEmitter.cpp
+++ b/utils/TableGen/AsmWriterEmitter.cpp
@@ -901,7 +901,7 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
                 break; // No conditions on this operand at all
             }
             Cond = Target.getName() + ClassName + "ValidateMCOperand(" +
-                   Op + ", " + llvm::utostr(Entry) + ")";
+                   Op + ", STI, " + llvm::utostr(Entry) + ")";
           }
           // for all subcases of ResultOperand::K_Record:
           IAP.addCond(Cond);
@@ -996,8 +996,9 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
 
   if (!MCOpPredicates.empty())
     O << "static bool " << Target.getName() << ClassName
-      << "ValidateMCOperand(\n"
-      << "       const MCOperand &MCOp, unsigned PredicateIndex);\n";
+      << "ValidateMCOperand(const MCOperand &MCOp,\n"
+      << "                  const MCSubtargetInfo &STI,\n"
+      << "                  unsigned PredicateIndex);\n";
 
   O << HeaderO.str();
   O.indent(2) << "const char *AsmString;\n";
@@ -1069,8 +1070,9 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
 
   if (!MCOpPredicates.empty()) {
     O << "static bool " << Target.getName() << ClassName
-      << "ValidateMCOperand(\n"
-      << "       const MCOperand &MCOp, unsigned PredicateIndex) {\n"
+      << "ValidateMCOperand(const MCOperand &MCOp,\n"
+      << "                  const MCSubtargetInfo &STI,\n"
+      << "                  unsigned PredicateIndex) {\n"      
       << "  switch (PredicateIndex) {\n"
       << "  default:\n"
       << "    llvm_unreachable(\"Unknown MCOperandPredicate kind\");\n"