X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FAArch64%2FAsmParser%2FAArch64AsmParser.cpp;h=e26420f6ed814acd9ee7c51b517690fdb9f21abc;hb=20bb042d74a95970b4942f38cb2606a84fc279f7;hp=e20700307970320d3b0b8b8eb689f41e63490670;hpb=112102c7fe7be6d3f322a07e0da00284284398c6;p=oota-llvm.git

diff --git a/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index e2070030797..e26420f6ed8 100644
--- a/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -9,6 +9,7 @@
 
 #include "MCTargetDesc/AArch64AddressingModes.h"
 #include "MCTargetDesc/AArch64MCExpr.h"
+#include "MCTargetDesc/AArch64TargetStreamer.h"
 #include "Utils/AArch64BaseInfo.h"
 #include "llvm/ADT/APInt.h"
 #include "llvm/ADT/STLExtras.h"
@@ -42,7 +43,6 @@ class AArch64Operand;
 class AArch64AsmParser : public MCTargetAsmParser {
 private:
   StringRef Mnemonic; ///< Instruction mnemonic.
-  MCSubtargetInfo &STI;
 
   // Map of register aliases registers via the .req directive.
   StringMap<std::pair<bool, unsigned> > RegisterReqs;
@@ -106,6 +106,7 @@ private:
   OperandMatchResultTy tryParseAddSubImm(OperandVector &Operands);
   OperandMatchResultTy tryParseGPR64sp0Operand(OperandVector &Operands);
   bool tryParseVectorRegister(OperandVector &Operands);
+  OperandMatchResultTy tryParseGPRSeqPair(OperandVector &Operands);
 
 public:
   enum AArch64MatchResultTy {
@@ -113,16 +114,16 @@ public:
 #define GET_OPERAND_DIAGNOSTIC_TYPES
 #include "AArch64GenAsmMatcher.inc"
   };
-  AArch64AsmParser(MCSubtargetInfo &STI, MCAsmParser &Parser,
+  AArch64AsmParser(const MCSubtargetInfo &STI, MCAsmParser &Parser,
                    const MCInstrInfo &MII, const MCTargetOptions &Options)
-      : MCTargetAsmParser(), STI(STI) {
+    : MCTargetAsmParser(Options, STI) {
     MCAsmParserExtension::Initialize(Parser);
     MCStreamer &S = getParser().getStreamer();
     if (S.getTargetStreamer() == nullptr)
       new AArch64TargetStreamer(S);
 
     // Initialize the set of available features.
-    setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
+    setAvailableFeatures(ComputeAvailableFeatures(getSTI().getFeatureBits()));
   }
 
   bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
@@ -495,6 +496,15 @@ public:
     return (Val % Scale) == 0 && Val >= 0 && (Val / Scale) < 0x1000;
   }
 
+  bool isImm0_1() const {
+    if (!isImm())
+      return false;
+    const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
+    if (!MCE)
+      return false;
+    int64_t Val = MCE->getValue();
+    return (Val >= 0 && Val < 2);
+  }
   bool isImm0_7() const {
     if (!isImm())
       return false;
@@ -697,6 +707,25 @@ public:
     const MCConstantExpr *CE = cast<MCConstantExpr>(Expr);
     return CE->getValue() >= 0 && CE->getValue() <= 0xfff;
   }
+  bool isAddSubImmNeg() const {
+    if (!isShiftedImm() && !isImm())
+      return false;
+
+    const MCExpr *Expr;
+
+    // An ADD/SUB shifter is either 'lsl #0' or 'lsl #12'.
+    if (isShiftedImm()) {
+      unsigned Shift = ShiftedImm.ShiftAmount;
+      Expr = ShiftedImm.Val;
+      if (Shift != 0 && Shift != 12)
+        return false;
+    } else
+      Expr = getImm();
+
+    // Otherwise it should be a real negative immediate in range:
+    const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
+    return CE != nullptr && CE->getValue() < 0 && -CE->getValue() <= 0xfff;
+  }
   bool isCondCode() const { return Kind == k_CondCode; }
   bool isSIMDImmType10() const {
     if (!isImm())
@@ -855,12 +884,14 @@ public:
   }
   bool isMSRSystemRegister() const {
     if (!isSysReg()) return false;
-
     return SysReg.MSRReg != -1U;
   }
-  bool isSystemPStateField() const {
+  bool isSystemPStateFieldWithImm0_1() const {
     if (!isSysReg()) return false;
-
+    return SysReg.PStateField == AArch64PState::PAN;
+  }
+  bool isSystemPStateFieldWithImm0_15() const {
+    if (!isSysReg() || isSystemPStateFieldWithImm0_1()) return false;
     return SysReg.PStateField != -1U;
   }
   bool isReg() const override { return Kind == k_Register && !Reg.isVector; }
@@ -874,6 +905,16 @@ public:
     return Kind == k_Register && !Reg.isVector &&
       AArch64MCRegisterClasses[AArch64::GPR64RegClassID].contains(Reg.RegNum);
   }
+  bool isWSeqPair() const {
+    return Kind == k_Register && !Reg.isVector &&
+           AArch64MCRegisterClasses[AArch64::WSeqPairsClassRegClassID].contains(
+               Reg.RegNum);
+  }
+  bool isXSeqPair() const {
+    return Kind == k_Register && !Reg.isVector &&
+           AArch64MCRegisterClasses[AArch64::XSeqPairsClassRegClassID].contains(
+               Reg.RegNum);
+  }
 
   bool isGPR64sp0() const {
     return Kind == k_Register && !Reg.isVector &&
@@ -1098,16 +1139,16 @@ public:
   void addExpr(MCInst &Inst, const MCExpr *Expr) const {
     // Add as immediates when possible.  Null MCExpr = 0.
     if (!Expr)
-      Inst.addOperand(MCOperand::CreateImm(0));
+      Inst.addOperand(MCOperand::createImm(0));
     else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
-      Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
+      Inst.addOperand(MCOperand::createImm(CE->getValue()));
     else
-      Inst.addOperand(MCOperand::CreateExpr(Expr));
+      Inst.addOperand(MCOperand::createExpr(Expr));
   }
 
   void addRegOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateReg(getReg()));
+    Inst.addOperand(MCOperand::createReg(getReg()));
   }
 
   void addGPR32as64Operands(MCInst &Inst, unsigned N) const {
@@ -1119,73 +1160,77 @@ public:
     uint32_t Reg = RI->getRegClass(AArch64::GPR32RegClassID).getRegister(
         RI->getEncodingValue(getReg()));
 
-    Inst.addOperand(MCOperand::CreateReg(Reg));
+    Inst.addOperand(MCOperand::createReg(Reg));
   }
 
   void addVectorReg64Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     assert(
         AArch64MCRegisterClasses[AArch64::FPR128RegClassID].contains(getReg()));
-    Inst.addOperand(MCOperand::CreateReg(AArch64::D0 + getReg() - AArch64::Q0));
+    Inst.addOperand(MCOperand::createReg(AArch64::D0 + getReg() - AArch64::Q0));
   }
 
   void addVectorReg128Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     assert(
         AArch64MCRegisterClasses[AArch64::FPR128RegClassID].contains(getReg()));
-    Inst.addOperand(MCOperand::CreateReg(getReg()));
+    Inst.addOperand(MCOperand::createReg(getReg()));
   }
 
   void addVectorRegLoOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateReg(getReg()));
+    Inst.addOperand(MCOperand::createReg(getReg()));
   }
 
   template <unsigned NumRegs>
   void addVectorList64Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    static unsigned FirstRegs[] = { AArch64::D0,       AArch64::D0_D1,
-                                    AArch64::D0_D1_D2, AArch64::D0_D1_D2_D3 };
+    static const unsigned FirstRegs[] = { AArch64::D0,
+                                          AArch64::D0_D1,
+                                          AArch64::D0_D1_D2,
+                                          AArch64::D0_D1_D2_D3 };
     unsigned FirstReg = FirstRegs[NumRegs - 1];
 
     Inst.addOperand(
-        MCOperand::CreateReg(FirstReg + getVectorListStart() - AArch64::Q0));
+        MCOperand::createReg(FirstReg + getVectorListStart() - AArch64::Q0));
   }
 
   template <unsigned NumRegs>
   void addVectorList128Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    static unsigned FirstRegs[] = { AArch64::Q0,       AArch64::Q0_Q1,
-                                    AArch64::Q0_Q1_Q2, AArch64::Q0_Q1_Q2_Q3 };
+    static const unsigned FirstRegs[] = { AArch64::Q0,
+                                          AArch64::Q0_Q1,
+                                          AArch64::Q0_Q1_Q2,
+                                          AArch64::Q0_Q1_Q2_Q3 };
     unsigned FirstReg = FirstRegs[NumRegs - 1];
 
     Inst.addOperand(
-        MCOperand::CreateReg(FirstReg + getVectorListStart() - AArch64::Q0));
+        MCOperand::createReg(FirstReg + getVectorListStart() - AArch64::Q0));
   }
 
   void addVectorIndex1Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
+    Inst.addOperand(MCOperand::createImm(getVectorIndex()));
   }
 
   void addVectorIndexBOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
+    Inst.addOperand(MCOperand::createImm(getVectorIndex()));
   }
 
   void addVectorIndexHOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
+    Inst.addOperand(MCOperand::createImm(getVectorIndex()));
   }
 
   void addVectorIndexSOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
+    Inst.addOperand(MCOperand::createImm(getVectorIndex()));
   }
 
   void addVectorIndexDOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
+    Inst.addOperand(MCOperand::createImm(getVectorIndex()));
   }
 
   void addImmOperands(MCInst &Inst, unsigned N) const {
@@ -1200,16 +1245,28 @@ public:
     assert(N == 2 && "Invalid number of operands!");
     if (isShiftedImm()) {
       addExpr(Inst, getShiftedImmVal());
-      Inst.addOperand(MCOperand::CreateImm(getShiftedImmShift()));
+      Inst.addOperand(MCOperand::createImm(getShiftedImmShift()));
     } else {
       addExpr(Inst, getImm());
-      Inst.addOperand(MCOperand::CreateImm(0));
+      Inst.addOperand(MCOperand::createImm(0));
     }
   }
 
+  void addAddSubImmNegOperands(MCInst &Inst, unsigned N) const {
+    assert(N == 2 && "Invalid number of operands!");
+
+    const MCExpr *MCE = isShiftedImm() ? getShiftedImmVal() : getImm();
+    const MCConstantExpr *CE = cast<MCConstantExpr>(MCE);
+    int64_t Val = -CE->getValue();
+    unsigned ShiftAmt = isShiftedImm() ? ShiftedImm.ShiftAmount : 0;
+
+    Inst.addOperand(MCOperand::createImm(Val));
+    Inst.addOperand(MCOperand::createImm(ShiftAmt));
+  }
+
   void addCondCodeOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateImm(getCondCode()));
+    Inst.addOperand(MCOperand::createImm(getCondCode()));
   }
 
   void addAdrpLabelOperands(MCInst &Inst, unsigned N) const {
@@ -1218,7 +1275,7 @@ public:
     if (!MCE)
       addExpr(Inst, getImm());
     else
-      Inst.addOperand(MCOperand::CreateImm(MCE->getValue() >> 12));
+      Inst.addOperand(MCOperand::createImm(MCE->getValue() >> 12));
   }
 
   void addAdrLabelOperands(MCInst &Inst, unsigned N) const {
@@ -1231,119 +1288,125 @@ public:
     const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
 
     if (!MCE) {
-      Inst.addOperand(MCOperand::CreateExpr(getImm()));
+      Inst.addOperand(MCOperand::createExpr(getImm()));
       return;
     }
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue() / Scale));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue() / Scale));
   }
 
   void addSImm9Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addSImm7s4Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue() / 4));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue() / 4));
   }
 
   void addSImm7s8Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue() / 8));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue() / 8));
   }
 
   void addSImm7s16Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue() / 16));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue() / 16));
+  }
+
+  void addImm0_1Operands(MCInst &Inst, unsigned N) const {
+    assert(N == 1 && "Invalid number of operands!");
+    const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm0_7Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm1_8Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm0_15Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm1_16Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
     assert(MCE && "Invalid constant immediate operand!");
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm0_31Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm1_31Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm1_32Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm0_63Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm1_63Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm1_64Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm0_127Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm0_255Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addImm32_63Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue()));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue()));
   }
 
   void addLogicalImm32Operands(MCInst &Inst, unsigned N) const {
@@ -1351,14 +1414,14 @@ public:
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
     uint64_t encoding =
         AArch64_AM::encodeLogicalImmediate(MCE->getValue() & 0xFFFFFFFF, 32);
-    Inst.addOperand(MCOperand::CreateImm(encoding));
+    Inst.addOperand(MCOperand::createImm(encoding));
   }
 
   void addLogicalImm64Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
     uint64_t encoding = AArch64_AM::encodeLogicalImmediate(MCE->getValue(), 64);
-    Inst.addOperand(MCOperand::CreateImm(encoding));
+    Inst.addOperand(MCOperand::createImm(encoding));
   }
 
   void addLogicalImm32NotOperands(MCInst &Inst, unsigned N) const {
@@ -1366,7 +1429,7 @@ public:
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
     int64_t Val = ~MCE->getValue() & 0xFFFFFFFF;
     uint64_t encoding = AArch64_AM::encodeLogicalImmediate(Val, 32);
-    Inst.addOperand(MCOperand::CreateImm(encoding));
+    Inst.addOperand(MCOperand::createImm(encoding));
   }
 
   void addLogicalImm64NotOperands(MCInst &Inst, unsigned N) const {
@@ -1374,14 +1437,14 @@ public:
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
     uint64_t encoding =
         AArch64_AM::encodeLogicalImmediate(~MCE->getValue(), 64);
-    Inst.addOperand(MCOperand::CreateImm(encoding));
+    Inst.addOperand(MCOperand::createImm(encoding));
   }
 
   void addSIMDImmType10Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
     uint64_t encoding = AArch64_AM::encodeAdvSIMDModImmType10(MCE->getValue());
-    Inst.addOperand(MCOperand::CreateImm(encoding));
+    Inst.addOperand(MCOperand::createImm(encoding));
   }
 
   void addBranchTarget26Operands(MCInst &Inst, unsigned N) const {
@@ -1395,7 +1458,7 @@ public:
       return;
     }
     assert(MCE && "Invalid constant immediate operand!");
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue() >> 2));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue() >> 2));
   }
 
   void addPCRelLabel19Operands(MCInst &Inst, unsigned N) const {
@@ -1409,7 +1472,7 @@ public:
       return;
     }
     assert(MCE && "Invalid constant immediate operand!");
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue() >> 2));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue() >> 2));
   }
 
   void addBranchTarget14Operands(MCInst &Inst, unsigned N) const {
@@ -1423,52 +1486,58 @@ public:
       return;
     }
     assert(MCE && "Invalid constant immediate operand!");
-    Inst.addOperand(MCOperand::CreateImm(MCE->getValue() >> 2));
+    Inst.addOperand(MCOperand::createImm(MCE->getValue() >> 2));
   }
 
   void addFPImmOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateImm(getFPImm()));
+    Inst.addOperand(MCOperand::createImm(getFPImm()));
   }
 
   void addBarrierOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateImm(getBarrier()));
+    Inst.addOperand(MCOperand::createImm(getBarrier()));
   }
 
   void addMRSSystemRegisterOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
 
-    Inst.addOperand(MCOperand::CreateImm(SysReg.MRSReg));
+    Inst.addOperand(MCOperand::createImm(SysReg.MRSReg));
   }
 
   void addMSRSystemRegisterOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
 
-    Inst.addOperand(MCOperand::CreateImm(SysReg.MSRReg));
+    Inst.addOperand(MCOperand::createImm(SysReg.MSRReg));
   }
 
-  void addSystemPStateFieldOperands(MCInst &Inst, unsigned N) const {
+  void addSystemPStateFieldWithImm0_1Operands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
 
-    Inst.addOperand(MCOperand::CreateImm(SysReg.PStateField));
+    Inst.addOperand(MCOperand::createImm(SysReg.PStateField));
+  }
+
+  void addSystemPStateFieldWithImm0_15Operands(MCInst &Inst, unsigned N) const {
+    assert(N == 1 && "Invalid number of operands!");
+
+    Inst.addOperand(MCOperand::createImm(SysReg.PStateField));
   }
 
   void addSysCROperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateImm(getSysCR()));
+    Inst.addOperand(MCOperand::createImm(getSysCR()));
   }
 
   void addPrefetchOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
-    Inst.addOperand(MCOperand::CreateImm(getPrefetch()));
+    Inst.addOperand(MCOperand::createImm(getPrefetch()));
   }
 
   void addShifterOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     unsigned Imm =
         AArch64_AM::getShifterImm(getShiftExtendType(), getShiftExtendAmount());
-    Inst.addOperand(MCOperand::CreateImm(Imm));
+    Inst.addOperand(MCOperand::createImm(Imm));
   }
 
   void addExtendOperands(MCInst &Inst, unsigned N) const {
@@ -1476,7 +1545,7 @@ public:
     AArch64_AM::ShiftExtendType ET = getShiftExtendType();
     if (ET == AArch64_AM::LSL) ET = AArch64_AM::UXTW;
     unsigned Imm = AArch64_AM::getArithExtendImm(ET, getShiftExtendAmount());
-    Inst.addOperand(MCOperand::CreateImm(Imm));
+    Inst.addOperand(MCOperand::createImm(Imm));
   }
 
   void addExtend64Operands(MCInst &Inst, unsigned N) const {
@@ -1484,15 +1553,15 @@ public:
     AArch64_AM::ShiftExtendType ET = getShiftExtendType();
     if (ET == AArch64_AM::LSL) ET = AArch64_AM::UXTX;
     unsigned Imm = AArch64_AM::getArithExtendImm(ET, getShiftExtendAmount());
-    Inst.addOperand(MCOperand::CreateImm(Imm));
+    Inst.addOperand(MCOperand::createImm(Imm));
   }
 
   void addMemExtendOperands(MCInst &Inst, unsigned N) const {
     assert(N == 2 && "Invalid number of operands!");
     AArch64_AM::ShiftExtendType ET = getShiftExtendType();
     bool IsSigned = ET == AArch64_AM::SXTW || ET == AArch64_AM::SXTX;
-    Inst.addOperand(MCOperand::CreateImm(IsSigned));
-    Inst.addOperand(MCOperand::CreateImm(getShiftExtendAmount() != 0));
+    Inst.addOperand(MCOperand::createImm(IsSigned));
+    Inst.addOperand(MCOperand::createImm(getShiftExtendAmount() != 0));
   }
 
   // For 8-bit load/store instructions with a register offset, both the
@@ -1503,8 +1572,8 @@ public:
     assert(N == 2 && "Invalid number of operands!");
     AArch64_AM::ShiftExtendType ET = getShiftExtendType();
     bool IsSigned = ET == AArch64_AM::SXTW || ET == AArch64_AM::SXTX;
-    Inst.addOperand(MCOperand::CreateImm(IsSigned));
-    Inst.addOperand(MCOperand::CreateImm(hasShiftExtendAmount()));
+    Inst.addOperand(MCOperand::createImm(IsSigned));
+    Inst.addOperand(MCOperand::createImm(hasShiftExtendAmount()));
   }
 
   template<int Shift>
@@ -1513,7 +1582,7 @@ public:
 
     const MCConstantExpr *CE = cast<MCConstantExpr>(getImm());
     uint64_t Value = CE->getValue();
-    Inst.addOperand(MCOperand::CreateImm((Value >> Shift) & 0xffff));
+    Inst.addOperand(MCOperand::createImm((Value >> Shift) & 0xffff));
   }
 
   template<int Shift>
@@ -1522,7 +1591,7 @@ public:
 
     const MCConstantExpr *CE = cast<MCConstantExpr>(getImm());
     uint64_t Value = CE->getValue();
-    Inst.addOperand(MCOperand::CreateImm((~Value >> Shift) & 0xffff));
+    Inst.addOperand(MCOperand::createImm((~Value >> Shift) & 0xffff));
   }
 
   void print(raw_ostream &OS) const override;
@@ -1690,12 +1759,12 @@ void AArch64Operand::print(raw_ostream &OS) const {
     break;
   }
   case k_Immediate:
-    getImm()->print(OS);
+    OS << *getImm();
     break;
   case k_ShiftedImm: {
     unsigned Shift = getShiftedImmShift();
     OS << "<shiftedimm ";
-    getShiftedImmVal()->print(OS);
+    OS << *getShiftedImmVal();
     OS << ", lsl #" << AArch64_AM::getShiftValue(Shift) << ">";
     break;
   }
@@ -1752,7 +1821,7 @@ static unsigned MatchRegisterName(StringRef Name);
 /// }
 
 static unsigned matchVectorRegName(StringRef Name) {
-  return StringSwitch<unsigned>(Name)
+  return StringSwitch<unsigned>(Name.lower())
       .Case("v0", AArch64::Q0)
       .Case("v1", AArch64::Q1)
       .Case("v2", AArch64::Q2)
@@ -1972,7 +2041,8 @@ AArch64AsmParser::tryParsePrefetch(OperandVector &Operands) {
 
     bool Valid;
     auto Mapper = AArch64PRFM::PRFMMapper();
-    StringRef Name = Mapper.toString(MCE->getValue(), Valid);
+    StringRef Name = 
+        Mapper.toString(MCE->getValue(), getSTI().getFeatureBits(), Valid);
     Operands.push_back(AArch64Operand::CreatePrefetch(prfop, Name,
                                                       S, getContext()));
     return MatchOperand_Success;
@@ -1985,7 +2055,8 @@ AArch64AsmParser::tryParsePrefetch(OperandVector &Operands) {
 
   bool Valid;
   auto Mapper = AArch64PRFM::PRFMMapper();
-  unsigned prfop = Mapper.fromString(Tok.getString(), Valid);
+  unsigned prfop = 
+      Mapper.fromString(Tok.getString(), getSTI().getFeatureBits(), Valid);
   if (!Valid) {
     TokError("pre-fetch hint expected");
     return MatchOperand_ParseFail;
@@ -2021,7 +2092,7 @@ AArch64AsmParser::tryParseAdrpLabel(OperandVector &Operands) {
       // No modifier was specified at all; this is the syntax for an ELF basic
       // ADRP relocation (unfortunately).
       Expr =
-          AArch64MCExpr::Create(Expr, AArch64MCExpr::VK_ABS_PAGE, getContext());
+          AArch64MCExpr::create(Expr, AArch64MCExpr::VK_ABS_PAGE, getContext());
     } else if ((DarwinRefKind == MCSymbolRefExpr::VK_GOTPAGE ||
                 DarwinRefKind == MCSymbolRefExpr::VK_TLVPPAGE) &&
                Addend != 0) {
@@ -2154,7 +2225,7 @@ AArch64AsmParser::tryParseAddSubImm(OperandVector &Operands) {
     if (MCE) {
       int64_t Val = MCE->getValue();
       if (Val > 0xfff && (Val & 0xfff) == 0) {
-        Imm = MCConstantExpr::Create(Val >> 12, getContext());
+        Imm = MCConstantExpr::create(Val >> 12, getContext());
         ShiftAmount = 12;
       }
     }
@@ -2344,14 +2415,14 @@ bool AArch64AsmParser::parseSysAlias(StringRef Name, SMLoc NameLoc,
 
 #define SYS_ALIAS(op1, Cn, Cm, op2)                                            \
   do {                                                                         \
-    Expr = MCConstantExpr::Create(op1, getContext());                          \
+    Expr = MCConstantExpr::create(op1, getContext());                          \
     Operands.push_back(                                                        \
         AArch64Operand::CreateImm(Expr, S, getLoc(), getContext()));           \
     Operands.push_back(                                                        \
         AArch64Operand::CreateSysCR(Cn, S, getLoc(), getContext()));           \
     Operands.push_back(                                                        \
         AArch64Operand::CreateSysCR(Cm, S, getLoc(), getContext()));           \
-    Expr = MCConstantExpr::Create(op2, getContext());                          \
+    Expr = MCConstantExpr::create(op2, getContext());                          \
     Operands.push_back(                                                        \
         AArch64Operand::CreateImm(Expr, S, getLoc(), getContext()));           \
   } while (0)
@@ -2598,7 +2669,8 @@ AArch64AsmParser::tryParseBarrierOperand(OperandVector &Operands) {
     }
     bool Valid;
     auto Mapper = AArch64DB::DBarrierMapper();
-    StringRef Name = Mapper.toString(MCE->getValue(), Valid);
+    StringRef Name = 
+        Mapper.toString(MCE->getValue(), getSTI().getFeatureBits(), Valid);
     Operands.push_back( AArch64Operand::CreateBarrier(MCE->getValue(), Name,
                                                       ExprLoc, getContext()));
     return MatchOperand_Success;
@@ -2611,7 +2683,8 @@ AArch64AsmParser::tryParseBarrierOperand(OperandVector &Operands) {
 
   bool Valid;
   auto Mapper = AArch64DB::DBarrierMapper();
-  unsigned Opt = Mapper.fromString(Tok.getString(), Valid);
+  unsigned Opt = 
+      Mapper.fromString(Tok.getString(), getSTI().getFeatureBits(), Valid);
   if (!Valid) {
     TokError("invalid barrier option name");
     return MatchOperand_ParseFail;
@@ -2640,19 +2713,21 @@ AArch64AsmParser::tryParseSysReg(OperandVector &Operands) {
 
   bool IsKnown;
   auto MRSMapper = AArch64SysReg::MRSMapper();
-  uint32_t MRSReg = MRSMapper.fromString(Tok.getString(), STI.getFeatureBits(),
-                                         IsKnown);
+  uint32_t MRSReg = MRSMapper.fromString(Tok.getString(),
+                                         getSTI().getFeatureBits(), IsKnown);
   assert(IsKnown == (MRSReg != -1U) &&
          "register should be -1 if and only if it's unknown");
 
   auto MSRMapper = AArch64SysReg::MSRMapper();
-  uint32_t MSRReg = MSRMapper.fromString(Tok.getString(), STI.getFeatureBits(),
-                                         IsKnown);
+  uint32_t MSRReg = MSRMapper.fromString(Tok.getString(),
+                                         getSTI().getFeatureBits(), IsKnown);
   assert(IsKnown == (MSRReg != -1U) &&
          "register should be -1 if and only if it's unknown");
 
   auto PStateMapper = AArch64PState::PStateMapper();
-  uint32_t PStateField = PStateMapper.fromString(Tok.getString(), IsKnown);
+  uint32_t PStateField = 
+      PStateMapper.fromString(Tok.getString(),
+                              getSTI().getFeatureBits(), IsKnown);
   assert(IsKnown == (PStateField != -1U) &&
          "register should be -1 if and only if it's unknown");
 
@@ -2829,7 +2904,7 @@ bool AArch64AsmParser::parseSymbolicImmVal(const MCExpr *&ImmVal) {
     return true;
 
   if (HasELFModifier)
-    ImmVal = AArch64MCExpr::Create(ImmVal, RefKind, getContext());
+    ImmVal = AArch64MCExpr::create(ImmVal, RefKind, getContext());
 
   return false;
 }
@@ -3103,7 +3178,7 @@ bool AArch64AsmParser::parseOperand(OperandVector &Operands, bool isCondCode,
 
     if (Operands.size() < 2 ||
         !static_cast<AArch64Operand &>(*Operands[1]).isReg())
-      return true;
+      return Error(Loc, "Only valid when first operand is register");
 
     bool IsXReg =
         AArch64MCRegisterClasses[AArch64::GPR64allRegClassID].contains(
@@ -3122,7 +3197,7 @@ bool AArch64AsmParser::parseOperand(OperandVector &Operands, bool isCondCode,
       if (ShiftAmt <= MaxShiftAmt && Imm <= 0xFFFF) {
           Operands[0] = AArch64Operand::CreateToken("movz", false, Loc, Ctx);
           Operands.push_back(AArch64Operand::CreateImm(
-                     MCConstantExpr::Create(Imm, Ctx), S, E, Ctx));
+                     MCConstantExpr::create(Imm, Ctx), S, E, Ctx));
         if (ShiftAmt)
           Operands.push_back(AArch64Operand::CreateShiftExtend(AArch64_AM::LSL,
                      ShiftAmt, true, S, E, Ctx));
@@ -3135,7 +3210,7 @@ bool AArch64AsmParser::parseOperand(OperandVector &Operands, bool isCondCode,
     }
     // If it is a label or an imm that cannot fit in a movz, put it into CP.
     const MCExpr *CPLoc =
-        getTargetStreamer().addConstantPoolEntry(SubExprVal, IsXReg ? 8 : 4);
+        getTargetStreamer().addConstantPoolEntry(SubExprVal, IsXReg ? 8 : 4, Loc);
     Operands.push_back(AArch64Operand::CreateImm(CPLoc, S, E, Ctx));
     return false;
   }
@@ -3553,6 +3628,8 @@ bool AArch64AsmParser::showMatchError(SMLoc Loc, unsigned ErrCode) {
     return Error(Loc, "index must be a multiple of 8 in range [0, 32760].");
   case Match_InvalidMemoryIndexed16:
     return Error(Loc, "index must be a multiple of 16 in range [0, 65520].");
+  case Match_InvalidImm0_1:
+    return Error(Loc, "immediate must be an integer in range [0, 1].");
   case Match_InvalidImm0_7:
     return Error(Loc, "immediate must be an integer in range [0, 7].");
   case Match_InvalidImm0_15:
@@ -3628,8 +3705,8 @@ bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
           NewOp4Val = 63 - Op3Val;
         }
 
-        const MCExpr *NewOp3 = MCConstantExpr::Create(NewOp3Val, getContext());
-        const MCExpr *NewOp4 = MCConstantExpr::Create(NewOp4Val, getContext());
+        const MCExpr *NewOp3 = MCConstantExpr::create(NewOp3Val, getContext());
+        const MCExpr *NewOp4 = MCConstantExpr::create(NewOp4Val, getContext());
 
         Operands[0] = AArch64Operand::CreateToken(
             "ubfm", false, Op.getStartLoc(), getContext());
@@ -3639,6 +3716,60 @@ bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
                                                 Op3.getEndLoc(), getContext());
       }
     }
+  } else if (NumOperands == 4 && Tok == "bfc") {
+    // FIXME: Horrible hack to handle BFC->BFM alias.
+    AArch64Operand &Op1 = static_cast<AArch64Operand &>(*Operands[1]);
+    AArch64Operand LSBOp = static_cast<AArch64Operand &>(*Operands[2]);
+    AArch64Operand WidthOp = static_cast<AArch64Operand &>(*Operands[3]);
+
+    if (Op1.isReg() && LSBOp.isImm() && WidthOp.isImm()) {
+      const MCConstantExpr *LSBCE = dyn_cast<MCConstantExpr>(LSBOp.getImm());
+      const MCConstantExpr *WidthCE = dyn_cast<MCConstantExpr>(WidthOp.getImm());
+
+      if (LSBCE && WidthCE) {
+        uint64_t LSB = LSBCE->getValue();
+        uint64_t Width = WidthCE->getValue();
+
+        uint64_t RegWidth = 0;
+        if (AArch64MCRegisterClasses[AArch64::GPR64allRegClassID].contains(
+                Op1.getReg()))
+          RegWidth = 64;
+        else
+          RegWidth = 32;
+
+        if (LSB >= RegWidth)
+          return Error(LSBOp.getStartLoc(),
+                       "expected integer in range [0, 31]");
+        if (Width < 1 || Width > RegWidth)
+          return Error(WidthOp.getStartLoc(),
+                       "expected integer in range [1, 32]");
+
+        uint64_t ImmR = 0;
+        if (RegWidth == 32)
+          ImmR = (32 - LSB) & 0x1f;
+        else
+          ImmR = (64 - LSB) & 0x3f;
+
+        uint64_t ImmS = Width - 1;
+
+        if (ImmR != 0 && ImmS >= ImmR)
+          return Error(WidthOp.getStartLoc(),
+                       "requested insert overflows register");
+
+        const MCExpr *ImmRExpr = MCConstantExpr::create(ImmR, getContext());
+        const MCExpr *ImmSExpr = MCConstantExpr::create(ImmS, getContext());
+        Operands[0] = AArch64Operand::CreateToken(
+              "bfm", false, Op.getStartLoc(), getContext());
+        Operands[2] = AArch64Operand::CreateReg(
+            RegWidth == 32 ? AArch64::WZR : AArch64::XZR, false, SMLoc(),
+            SMLoc(), getContext());
+        Operands[3] = AArch64Operand::CreateImm(
+            ImmRExpr, LSBOp.getStartLoc(), LSBOp.getEndLoc(), getContext());
+        Operands.emplace_back(
+            AArch64Operand::CreateImm(ImmSExpr, WidthOp.getStartLoc(),
+                                      WidthOp.getEndLoc(), getContext()));
+      }
+    }
   } else if (NumOperands == 5) {
     // FIXME: Horrible hack to handle the BFI -> BFM, SBFIZ->SBFM, and
     // UBFIZ -> UBFM aliases.
@@ -3670,8 +3801,7 @@ bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
                          "expected integer in range [1, 32]");
 
           uint64_t NewOp3Val = 0;
-          if (AArch64MCRegisterClasses[AArch64::GPR32allRegClassID].contains(
-                  Op1.getReg()))
+          if (RegWidth == 32)
             NewOp3Val = (32 - Op3Val) & 0x1f;
           else
             NewOp3Val = (64 - Op3Val) & 0x3f;
@@ -3683,9 +3813,9 @@ bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
                          "requested insert overflows register");
 
           const MCExpr *NewOp3 =
-              MCConstantExpr::Create(NewOp3Val, getContext());
+              MCConstantExpr::create(NewOp3Val, getContext());
           const MCExpr *NewOp4 =
-              MCConstantExpr::Create(NewOp4Val, getContext());
+              MCConstantExpr::create(NewOp4Val, getContext());
           Operands[3] = AArch64Operand::CreateImm(
               NewOp3, Op3.getStartLoc(), Op3.getEndLoc(), getContext());
           Operands[4] = AArch64Operand::CreateImm(
@@ -3741,7 +3871,7 @@ bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
                          "requested extract overflows register");
 
           const MCExpr *NewOp4 =
-              MCConstantExpr::Create(NewOp4Val, getContext());
+              MCConstantExpr::create(NewOp4Val, getContext());
           Operands[4] = AArch64Operand::CreateImm(
               NewOp4, Op4.getStartLoc(), Op4.getEndLoc(), getContext());
           if (Tok == "bfxil")
@@ -3828,10 +3958,27 @@ bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
 
   // If that fails, try against the alternate table containing long-form NEON:
   // "fadd v0.2s, v1.2s, v2.2s"
-  if (MatchResult != Match_Success)
+  if (MatchResult != Match_Success) {
+    // But first, save the short-form match result: we can use it in case the
+    // long-form match also fails.
+    auto ShortFormNEONErrorInfo = ErrorInfo;
+    auto ShortFormNEONMatchResult = MatchResult;
+
     MatchResult =
         MatchInstructionImpl(Operands, Inst, ErrorInfo, MatchingInlineAsm, 0);
 
+    // Now, both matches failed, and the long-form match failed on the mnemonic
+    // suffix token operand.  The short-form match failure is probably more
+    // relevant: use it instead.
+    if (MatchResult == Match_InvalidOperand && ErrorInfo == 1 &&
+        Operands.size() > 1 && ((AArch64Operand &)*Operands[1]).isToken() &&
+        ((AArch64Operand &)*Operands[1]).isTokenSuffix()) {
+      MatchResult = ShortFormNEONMatchResult;
+      ErrorInfo = ShortFormNEONErrorInfo;
+    }
+  }
+
+
   switch (MatchResult) {
   case Match_Success: {
     // Perform range checking and other semantic validations
@@ -3843,7 +3990,7 @@ bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
       return true;
 
     Inst.setLoc(IDLoc);
-    Out.EmitInstruction(Inst, STI);
+    Out.EmitInstruction(Inst, getSTI());
     return false;
   }
   case Match_MissingFeature: {
@@ -3865,6 +4012,7 @@ bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
     return showMatchError(IDLoc, MatchResult);
   case Match_InvalidOperand: {
     SMLoc ErrorLoc = IDLoc;
+
     if (ErrorInfo != ~0ULL) {
       if (ErrorInfo >= Operands.size())
         return Error(IDLoc, "too few operands for instruction");
@@ -3910,6 +4058,7 @@ bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
   case Match_InvalidMemoryIndexed8SImm7:
   case Match_InvalidMemoryIndexed16SImm7:
   case Match_InvalidMemoryIndexedSImm9:
+  case Match_InvalidImm0_1:
   case Match_InvalidImm0_7:
   case Match_InvalidImm0_15:
   case Match_InvalidImm0_31:
@@ -3962,7 +4111,7 @@ bool AArch64AsmParser::ParseDirective(AsmToken DirectiveID) {
   if (IDVal == ".ltorg" || IDVal == ".pool")
     return parseDirectiveLtorg(Loc);
   if (IDVal == ".unreq")
-    return parseDirectiveUnreq(DirectiveID.getLoc());
+    return parseDirectiveUnreq(Loc);
 
   if (!IsMachO && !IsCOFF) {
     if (IDVal == ".inst")
@@ -3982,7 +4131,7 @@ bool AArch64AsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
       if (getParser().parseExpression(Value))
         return true;
 
-      getParser().getStreamer().EmitValue(Value, Size);
+      getParser().getStreamer().EmitValue(Value, Size, L);
 
       if (getLexer().is(AsmToken::EndOfStatement))
         break;
@@ -4046,15 +4195,15 @@ bool AArch64AsmParser::parseDirectiveTLSDescCall(SMLoc L) {
   if (getParser().parseIdentifier(Name))
     return Error(L, "expected symbol after directive");
 
-  MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
-  const MCExpr *Expr = MCSymbolRefExpr::Create(Sym, getContext());
-  Expr = AArch64MCExpr::Create(Expr, AArch64MCExpr::VK_TLSDESC, getContext());
+  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
+  const MCExpr *Expr = MCSymbolRefExpr::create(Sym, getContext());
+  Expr = AArch64MCExpr::create(Expr, AArch64MCExpr::VK_TLSDESC, getContext());
 
   MCInst Inst;
   Inst.setOpcode(AArch64::TLSDESCCALL);
-  Inst.addOperand(MCOperand::CreateExpr(Expr));
+  Inst.addOperand(MCOperand::createExpr(Expr));
 
-  getParser().getStreamer().EmitInstruction(Inst, STI);
+  getParser().getStreamer().EmitInstruction(Inst, getSTI());
   return false;
 }
 
@@ -4095,7 +4244,7 @@ bool AArch64AsmParser::parseDirectiveLOH(StringRef IDVal, SMLoc Loc) {
     StringRef Name;
     if (getParser().parseIdentifier(Name))
       return TokError("expected identifier in directive");
-    Args.push_back(getContext().GetOrCreateSymbol(Name));
+    Args.push_back(getContext().getOrCreateSymbol(Name));
 
     if (Idx + 1 == NbArgs)
       break;
@@ -4295,3 +4444,77 @@ unsigned AArch64AsmParser::validateTargetOperandClass(MCParsedAsmOperand &AsmOp,
     return Match_Success;
   return Match_InvalidOperand;
 }
+
+
+AArch64AsmParser::OperandMatchResultTy
+AArch64AsmParser::tryParseGPRSeqPair(OperandVector &Operands) {
+
+  SMLoc S = getLoc();
+
+  if (getParser().getTok().isNot(AsmToken::Identifier)) {
+    Error(S, "expected register");
+    return MatchOperand_ParseFail;
+  }
+
+  int FirstReg = tryParseRegister();
+  if (FirstReg == -1) {
+    return MatchOperand_ParseFail;
+  }
+  const MCRegisterClass &WRegClass =
+      AArch64MCRegisterClasses[AArch64::GPR32RegClassID];
+  const MCRegisterClass &XRegClass =
+      AArch64MCRegisterClasses[AArch64::GPR64RegClassID];
+
+  bool isXReg = XRegClass.contains(FirstReg),
+       isWReg = WRegClass.contains(FirstReg);
+  if (!isXReg && !isWReg) {
+    Error(S, "expected first even register of a "
+             "consecutive same-size even/odd register pair");
+    return MatchOperand_ParseFail;
+  }
+
+  const MCRegisterInfo *RI = getContext().getRegisterInfo();
+  unsigned FirstEncoding = RI->getEncodingValue(FirstReg);
+
+  if (FirstEncoding & 0x1) {
+    Error(S, "expected first even register of a "
+             "consecutive same-size even/odd register pair");
+    return MatchOperand_ParseFail;
+  }
+
+  SMLoc M = getLoc();
+  if (getParser().getTok().isNot(AsmToken::Comma)) {
+    Error(M, "expected comma");
+    return MatchOperand_ParseFail;
+  }
+  // Eat the comma
+  getParser().Lex();
+
+  SMLoc E = getLoc();
+  int SecondReg = tryParseRegister();
+  if (SecondReg ==-1) {
+    return MatchOperand_ParseFail;
+  }
+
+ if (RI->getEncodingValue(SecondReg) != FirstEncoding + 1 ||
+      (isXReg && !XRegClass.contains(SecondReg)) ||
+      (isWReg && !WRegClass.contains(SecondReg))) {
+    Error(E,"expected second odd register of a "
+             "consecutive same-size even/odd register pair");
+    return MatchOperand_ParseFail;
+  }
+  
+  unsigned Pair = 0;
+  if(isXReg) {
+    Pair = RI->getMatchingSuperReg(FirstReg, AArch64::sube64,
+           &AArch64MCRegisterClasses[AArch64::XSeqPairsClassRegClassID]);
+  } else {
+    Pair = RI->getMatchingSuperReg(FirstReg, AArch64::sube32,
+           &AArch64MCRegisterClasses[AArch64::WSeqPairsClassRegClassID]);
+  }
+
+  Operands.push_back(AArch64Operand::CreateReg(Pair, false, S, getLoc(),
+      getContext()));
+
+  return MatchOperand_Success;
+}