Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 752 deletions

diff --git a/gnu/llvm/utils/TableGen/CodeGenInstruction.cpp b/gnu/llvm/utils/TableGen/CodeGenInstruction.cpp
deleted file mode 100644
index 6d06ba2c8b6..00000000000
--- a/gnu/llvm/utils/TableGen/CodeGenInstruction.cpp
+++ /dev/null
@@ -1,752 +0,0 @@
-//===- CodeGenInstruction.cpp - CodeGen Instruction Class Wrapper ---------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the CodeGenInstruction class.
-//
-//===----------------------------------------------------------------------===//
-
-#include "CodeGenInstruction.h"
-#include "CodeGenTarget.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/TableGen/Error.h"
-#include "llvm/TableGen/Record.h"
-#include <set>
-using namespace llvm;
-
-//===----------------------------------------------------------------------===//
-// CGIOperandList Implementation
-//===----------------------------------------------------------------------===//
-
-CGIOperandList::CGIOperandList(Record *R) : TheDef(R) {
-  isPredicable = false;
-  hasOptionalDef = false;
-  isVariadic = false;
-
-  DagInit *OutDI = R->getValueAsDag("OutOperandList");
-
-  if (DefInit *Init = dyn_cast<DefInit>(OutDI->getOperator())) {
-    if (Init->getDef()->getName() != "outs")
-      PrintFatalError(R->getName() + ": invalid def name for output list: use 'outs'");
-  } else
-    PrintFatalError(R->getName() + ": invalid output list: use 'outs'");
-
-  NumDefs = OutDI->getNumArgs();
-
-  DagInit *InDI = R->getValueAsDag("InOperandList");
-  if (DefInit *Init = dyn_cast<DefInit>(InDI->getOperator())) {
-    if (Init->getDef()->getName() != "ins")
-      PrintFatalError(R->getName() + ": invalid def name for input list: use 'ins'");
-  } else
-    PrintFatalError(R->getName() + ": invalid input list: use 'ins'");
-
-  unsigned MIOperandNo = 0;
-  std::set<std::string> OperandNames;
-  unsigned e = InDI->getNumArgs() + OutDI->getNumArgs();
-  OperandList.reserve(e);
-  for (unsigned i = 0; i != e; ++i){
-    Init *ArgInit;
-    StringRef ArgName;
-    if (i < NumDefs) {
-      ArgInit = OutDI->getArg(i);
-      ArgName = OutDI->getArgNameStr(i);
-    } else {
-      ArgInit = InDI->getArg(i-NumDefs);
-      ArgName = InDI->getArgNameStr(i-NumDefs);
-    }
-
-    DefInit *Arg = dyn_cast<DefInit>(ArgInit);
-    if (!Arg)
-      PrintFatalError("Illegal operand for the '" + R->getName() + "' instruction!");
-
-    Record *Rec = Arg->getDef();
-    std::string PrintMethod = "printOperand";
-    std::string EncoderMethod;
-    std::string OperandType = "OPERAND_UNKNOWN";
-    std::string OperandNamespace = "MCOI";
-    unsigned NumOps = 1;
-    DagInit *MIOpInfo = nullptr;
-    if (Rec->isSubClassOf("RegisterOperand")) {
-      PrintMethod = Rec->getValueAsString("PrintMethod");
-      OperandType = Rec->getValueAsString("OperandType");
-      OperandNamespace = Rec->getValueAsString("OperandNamespace");
-      EncoderMethod = Rec->getValueAsString("EncoderMethod");
-    } else if (Rec->isSubClassOf("Operand")) {
-      PrintMethod = Rec->getValueAsString("PrintMethod");
-      OperandType = Rec->getValueAsString("OperandType");
-      OperandNamespace = Rec->getValueAsString("OperandNamespace");
-      // If there is an explicit encoder method, use it.
-      EncoderMethod = Rec->getValueAsString("EncoderMethod");
-      MIOpInfo = Rec->getValueAsDag("MIOperandInfo");
-
-      // Verify that MIOpInfo has an 'ops' root value.
-      if (!isa<DefInit>(MIOpInfo->getOperator()) ||
-          cast<DefInit>(MIOpInfo->getOperator())->getDef()->getName() != "ops")
-        PrintFatalError("Bad value for MIOperandInfo in operand '" + Rec->getName() +
-          "'\n");
-
-      // If we have MIOpInfo, then we have #operands equal to number of entries
-      // in MIOperandInfo.
-      if (unsigned NumArgs = MIOpInfo->getNumArgs())
-        NumOps = NumArgs;
-
-      if (Rec->isSubClassOf("PredicateOp"))
-        isPredicable = true;
-      else if (Rec->isSubClassOf("OptionalDefOperand"))
-        hasOptionalDef = true;
-    } else if (Rec->getName() == "variable_ops") {
-      isVariadic = true;
-      continue;
-    } else if (Rec->isSubClassOf("RegisterClass")) {
-      OperandType = "OPERAND_REGISTER";
-    } else if (!Rec->isSubClassOf("PointerLikeRegClass") &&
-               !Rec->isSubClassOf("unknown_class"))
-      PrintFatalError("Unknown operand class '" + Rec->getName() +
-        "' in '" + R->getName() + "' instruction!");
-
-    // Check that the operand has a name and that it's unique.
-    if (ArgName.empty())
-      PrintFatalError("In instruction '" + R->getName() + "', operand #" +
-                      Twine(i) + " has no name!");
-    if (!OperandNames.insert(ArgName).second)
-      PrintFatalError("In instruction '" + R->getName() + "', operand #" +
-                      Twine(i) + " has the same name as a previous operand!");
-
-    OperandList.emplace_back(Rec, ArgName, PrintMethod, EncoderMethod,
-                             OperandNamespace + "::" + OperandType, MIOperandNo,
-                             NumOps, MIOpInfo);
-    MIOperandNo += NumOps;
-  }
-
-
-  // Make sure the constraints list for each operand is large enough to hold
-  // constraint info, even if none is present.
-  for (OperandInfo &OpInfo : OperandList)
-    OpInfo.Constraints.resize(OpInfo.MINumOperands);
-}
-
-
-/// getOperandNamed - Return the index of the operand with the specified
-/// non-empty name.  If the instruction does not have an operand with the
-/// specified name, abort.
-///
-unsigned CGIOperandList::getOperandNamed(StringRef Name) const {
-  unsigned OpIdx;
-  if (hasOperandNamed(Name, OpIdx)) return OpIdx;
-  PrintFatalError("'" + TheDef->getName() +
-                  "' does not have an operand named '$" + Name + "'!");
-}
-
-/// hasOperandNamed - Query whether the instruction has an operand of the
-/// given name. If so, return true and set OpIdx to the index of the
-/// operand. Otherwise, return false.
-bool CGIOperandList::hasOperandNamed(StringRef Name, unsigned &OpIdx) const {
-  assert(!Name.empty() && "Cannot search for operand with no name!");
-  for (unsigned i = 0, e = OperandList.size(); i != e; ++i)
-    if (OperandList[i].Name == Name) {
-      OpIdx = i;
-      return true;
-    }
-  return false;
-}
-
-std::pair<unsigned,unsigned>
-CGIOperandList::ParseOperandName(const std::string &Op, bool AllowWholeOp) {
-  if (Op.empty() || Op[0] != '$')
-    PrintFatalError(TheDef->getName() + ": Illegal operand name: '" + Op + "'");
-
-  std::string OpName = Op.substr(1);
-  std::string SubOpName;
-
-  // Check to see if this is $foo.bar.
-  std::string::size_type DotIdx = OpName.find_first_of('.');
-  if (DotIdx != std::string::npos) {
-    SubOpName = OpName.substr(DotIdx+1);
-    if (SubOpName.empty())
-      PrintFatalError(TheDef->getName() + ": illegal empty suboperand name in '" +Op +"'");
-    OpName = OpName.substr(0, DotIdx);
-  }
-
-  unsigned OpIdx = getOperandNamed(OpName);
-
-  if (SubOpName.empty()) {  // If no suboperand name was specified:
-    // If one was needed, throw.
-    if (OperandList[OpIdx].MINumOperands > 1 && !AllowWholeOp &&
-        SubOpName.empty())
-      PrintFatalError(TheDef->getName() + ": Illegal to refer to"
-        " whole operand part of complex operand '" + Op + "'");
-
-    // Otherwise, return the operand.
-    return std::make_pair(OpIdx, 0U);
-  }
-
-  // Find the suboperand number involved.
-  DagInit *MIOpInfo = OperandList[OpIdx].MIOperandInfo;
-  if (!MIOpInfo)
-    PrintFatalError(TheDef->getName() + ": unknown suboperand name in '" + Op + "'");
-
-  // Find the operand with the right name.
-  for (unsigned i = 0, e = MIOpInfo->getNumArgs(); i != e; ++i)
-    if (MIOpInfo->getArgNameStr(i) == SubOpName)
-      return std::make_pair(OpIdx, i);
-
-  // Otherwise, didn't find it!
-  PrintFatalError(TheDef->getName() + ": unknown suboperand name in '" + Op + "'");
-  return std::make_pair(0U, 0U);
-}
-
-static void ParseConstraint(const std::string &CStr, CGIOperandList &Ops,
-                            Record *Rec) {
-  // EARLY_CLOBBER: @early $reg
-  std::string::size_type wpos = CStr.find_first_of(" \t");
-  std::string::size_type start = CStr.find_first_not_of(" \t");
-  std::string Tok = CStr.substr(start, wpos - start);
-  if (Tok == "@earlyclobber") {
-    std::string Name = CStr.substr(wpos+1);
-    wpos = Name.find_first_not_of(" \t");
-    if (wpos == std::string::npos)
-      PrintFatalError(
-        Rec->getLoc(), "Illegal format for @earlyclobber constraint in '" +
-        Rec->getName() + "': '" + CStr + "'");
-    Name = Name.substr(wpos);
-    std::pair<unsigned,unsigned> Op = Ops.ParseOperandName(Name, false);
-
-    // Build the string for the operand
-    if (!Ops[Op.first].Constraints[Op.second].isNone())
-      PrintFatalError(
-        Rec->getLoc(), "Operand '" + Name + "' of '" + Rec->getName() +
-        "' cannot have multiple constraints!");
-    Ops[Op.first].Constraints[Op.second] =
-    CGIOperandList::ConstraintInfo::getEarlyClobber();
-    return;
-  }
-
-  // Only other constraint is "TIED_TO" for now.
-  std::string::size_type pos = CStr.find_first_of('=');
-  if (pos == std::string::npos)
-    PrintFatalError(
-      Rec->getLoc(), "Unrecognized constraint '" + CStr +
-      "' in '" + Rec->getName() + "'");
-  start = CStr.find_first_not_of(" \t");
-
-  // TIED_TO: $src1 = $dst
-  wpos = CStr.find_first_of(" \t", start);
-  if (wpos == std::string::npos || wpos > pos)
-    PrintFatalError(
-      Rec->getLoc(), "Illegal format for tied-to constraint in '" +
-      Rec->getName() + "': '" + CStr + "'");
-  std::string LHSOpName = StringRef(CStr).substr(start, wpos - start);
-  std::pair<unsigned,unsigned> LHSOp = Ops.ParseOperandName(LHSOpName, false);
-
-  wpos = CStr.find_first_not_of(" \t", pos + 1);
-  if (wpos == std::string::npos)
-    PrintFatalError(
-      Rec->getLoc(), "Illegal format for tied-to constraint: '" + CStr + "'");
-
-  std::string RHSOpName = StringRef(CStr).substr(wpos);
-  std::pair<unsigned,unsigned> RHSOp = Ops.ParseOperandName(RHSOpName, false);
-
-  // Sort the operands into order, which should put the output one
-  // first. But keep the original order, for use in diagnostics.
-  bool FirstIsDest = (LHSOp < RHSOp);
-  std::pair<unsigned,unsigned> DestOp = (FirstIsDest ? LHSOp : RHSOp);
-  StringRef DestOpName = (FirstIsDest ? LHSOpName : RHSOpName);
-  std::pair<unsigned,unsigned> SrcOp = (FirstIsDest ? RHSOp : LHSOp);
-  StringRef SrcOpName = (FirstIsDest ? RHSOpName : LHSOpName);
-
-  // Ensure one operand is a def and the other is a use.
-  if (DestOp.first >= Ops.NumDefs)
-    PrintFatalError(
-      Rec->getLoc(), "Input operands '" + LHSOpName + "' and '" + RHSOpName +
-      "' of '" + Rec->getName() + "' cannot be tied!");
-  if (SrcOp.first < Ops.NumDefs)
-    PrintFatalError(
-      Rec->getLoc(), "Output operands '" + LHSOpName + "' and '" + RHSOpName +
-      "' of '" + Rec->getName() + "' cannot be tied!");
-
-  // The constraint has to go on the operand with higher index, i.e.
-  // the source one. Check there isn't another constraint there
-  // already.
-  if (!Ops[SrcOp.first].Constraints[SrcOp.second].isNone())
-    PrintFatalError(
-      Rec->getLoc(), "Operand '" + SrcOpName + "' of '" + Rec->getName() +
-      "' cannot have multiple constraints!");
-
-  unsigned DestFlatOpNo = Ops.getFlattenedOperandNumber(DestOp);
-  auto NewConstraint = CGIOperandList::ConstraintInfo::getTied(DestFlatOpNo);
-
-  // Check that the earlier operand is not the target of another tie
-  // before making it the target of this one.
-  for (const CGIOperandList::OperandInfo &Op : Ops) {
-    for (unsigned i = 0; i < Op.MINumOperands; i++)
-      if (Op.Constraints[i] == NewConstraint)
-        PrintFatalError(
-          Rec->getLoc(), "Operand '" + DestOpName + "' of '" + Rec->getName() +
-          "' cannot have multiple operands tied to it!");
-  }
-
-  Ops[SrcOp.first].Constraints[SrcOp.second] = NewConstraint;
-}
-
-static void ParseConstraints(const std::string &CStr, CGIOperandList &Ops,
-                             Record *Rec) {
-  if (CStr.empty()) return;
-
-  const std::string delims(",");
-  std::string::size_type bidx, eidx;
-
-  bidx = CStr.find_first_not_of(delims);
-  while (bidx != std::string::npos) {
-    eidx = CStr.find_first_of(delims, bidx);
-    if (eidx == std::string::npos)
-      eidx = CStr.length();
-
-    ParseConstraint(CStr.substr(bidx, eidx - bidx), Ops, Rec);
-    bidx = CStr.find_first_not_of(delims, eidx);
-  }
-}
-
-void CGIOperandList::ProcessDisableEncoding(std::string DisableEncoding) {
-  while (1) {
-    std::pair<StringRef, StringRef> P = getToken(DisableEncoding, " ,\t");
-    std::string OpName = P.first;
-    DisableEncoding = P.second;
-    if (OpName.empty()) break;
-
-    // Figure out which operand this is.
-    std::pair<unsigned,unsigned> Op = ParseOperandName(OpName, false);
-
-    // Mark the operand as not-to-be encoded.
-    if (Op.second >= OperandList[Op.first].DoNotEncode.size())
-      OperandList[Op.first].DoNotEncode.resize(Op.second+1);
-    OperandList[Op.first].DoNotEncode[Op.second] = true;
-  }
-
-}
-
-//===----------------------------------------------------------------------===//
-// CodeGenInstruction Implementation
-//===----------------------------------------------------------------------===//
-
-CodeGenInstruction::CodeGenInstruction(Record *R)
-  : TheDef(R), Operands(R), InferredFrom(nullptr) {
-  Namespace = R->getValueAsString("Namespace");
-  AsmString = R->getValueAsString("AsmString");
-
-  isReturn     = R->getValueAsBit("isReturn");
-  isEHScopeReturn = R->getValueAsBit("isEHScopeReturn");
-  isBranch     = R->getValueAsBit("isBranch");
-  isIndirectBranch = R->getValueAsBit("isIndirectBranch");
-  isCompare    = R->getValueAsBit("isCompare");
-  isMoveImm    = R->getValueAsBit("isMoveImm");
-  isMoveReg    = R->getValueAsBit("isMoveReg");
-  isBitcast    = R->getValueAsBit("isBitcast");
-  isSelect     = R->getValueAsBit("isSelect");
-  isBarrier    = R->getValueAsBit("isBarrier");
-  isCall       = R->getValueAsBit("isCall");
-  isAdd        = R->getValueAsBit("isAdd");
-  isTrap       = R->getValueAsBit("isTrap");
-  canFoldAsLoad = R->getValueAsBit("canFoldAsLoad");
-  isPredicable = Operands.isPredicable || R->getValueAsBit("isPredicable");
-  isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress");
-  isCommutable = R->getValueAsBit("isCommutable");
-  isTerminator = R->getValueAsBit("isTerminator");
-  isReMaterializable = R->getValueAsBit("isReMaterializable");
-  hasDelaySlot = R->getValueAsBit("hasDelaySlot");
-  usesCustomInserter = R->getValueAsBit("usesCustomInserter");
-  hasPostISelHook = R->getValueAsBit("hasPostISelHook");
-  hasCtrlDep   = R->getValueAsBit("hasCtrlDep");
-  isNotDuplicable = R->getValueAsBit("isNotDuplicable");
-  isRegSequence = R->getValueAsBit("isRegSequence");
-  isExtractSubreg = R->getValueAsBit("isExtractSubreg");
-  isInsertSubreg = R->getValueAsBit("isInsertSubreg");
-  isConvergent = R->getValueAsBit("isConvergent");
-  hasNoSchedulingInfo = R->getValueAsBit("hasNoSchedulingInfo");
-  FastISelShouldIgnore = R->getValueAsBit("FastISelShouldIgnore");
-  variadicOpsAreDefs = R->getValueAsBit("variadicOpsAreDefs");
-
-  bool Unset;
-  mayLoad      = R->getValueAsBitOrUnset("mayLoad", Unset);
-  mayLoad_Unset = Unset;
-  mayStore     = R->getValueAsBitOrUnset("mayStore", Unset);
-  mayStore_Unset = Unset;
-  hasSideEffects = R->getValueAsBitOrUnset("hasSideEffects", Unset);
-  hasSideEffects_Unset = Unset;
-
-  isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove");
-  hasExtraSrcRegAllocReq = R->getValueAsBit("hasExtraSrcRegAllocReq");
-  hasExtraDefRegAllocReq = R->getValueAsBit("hasExtraDefRegAllocReq");
-  isCodeGenOnly = R->getValueAsBit("isCodeGenOnly");
-  isPseudo = R->getValueAsBit("isPseudo");
-  ImplicitDefs = R->getValueAsListOfDefs("Defs");
-  ImplicitUses = R->getValueAsListOfDefs("Uses");
-
-  // This flag is only inferred from the pattern.
-  hasChain = false;
-  hasChain_Inferred = false;
-
-  // Parse Constraints.
-  ParseConstraints(R->getValueAsString("Constraints"), Operands, R);
-
-  // 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
-/// implicit def and it has a known VT, return the VT, otherwise return
-/// MVT::Other.
-MVT::SimpleValueType CodeGenInstruction::
-HasOneImplicitDefWithKnownVT(const CodeGenTarget &TargetInfo) const {
-  if (ImplicitDefs.empty()) return MVT::Other;
-
-  // Check to see if the first implicit def has a resolvable type.
-  Record *FirstImplicitDef = ImplicitDefs[0];
-  assert(FirstImplicitDef->isSubClassOf("Register"));
-  const std::vector<ValueTypeByHwMode> &RegVTs =
-    TargetInfo.getRegisterVTs(FirstImplicitDef);
-  if (RegVTs.size() == 1 && RegVTs[0].isSimple())
-    return RegVTs[0].getSimple().SimpleTy;
-  return MVT::Other;
-}
-
-
-/// FlattenAsmStringVariants - Flatten the specified AsmString to only
-/// include text from the specified variant, returning the new string.
-std::string CodeGenInstruction::
-FlattenAsmStringVariants(StringRef Cur, unsigned Variant) {
-  std::string Res = "";
-
-  for (;;) {
-    // Find the start of the next variant string.
-    size_t VariantsStart = 0;
-    for (size_t e = Cur.size(); VariantsStart != e; ++VariantsStart)
-      if (Cur[VariantsStart] == '{' &&
-          (VariantsStart == 0 || (Cur[VariantsStart-1] != '$' &&
-                                  Cur[VariantsStart-1] != '\\')))
-        break;
-
-    // Add the prefix to the result.
-    Res += Cur.slice(0, VariantsStart);
-    if (VariantsStart == Cur.size())
-      break;
-
-    ++VariantsStart; // Skip the '{'.
-
-    // Scan to the end of the variants string.
-    size_t VariantsEnd = VariantsStart;
-    unsigned NestedBraces = 1;
-    for (size_t e = Cur.size(); VariantsEnd != e; ++VariantsEnd) {
-      if (Cur[VariantsEnd] == '}' && Cur[VariantsEnd-1] != '\\') {
-        if (--NestedBraces == 0)
-          break;
-      } else if (Cur[VariantsEnd] == '{')
-        ++NestedBraces;
-    }
-
-    // Select the Nth variant (or empty).
-    StringRef Selection = Cur.slice(VariantsStart, VariantsEnd);
-    for (unsigned i = 0; i != Variant; ++i)
-      Selection = Selection.split('|').second;
-    Res += Selection.split('|').first;
-
-    assert(VariantsEnd != Cur.size() &&
-           "Unterminated variants in assembly string!");
-    Cur = Cur.substr(VariantsEnd + 1);
-  }
-
-  return Res;
-}
-
-bool CodeGenInstruction::isOperandAPointer(unsigned i) const {
-  if (DagInit *ConstraintList = TheDef->getValueAsDag("InOperandList")) {
-    if (i < ConstraintList->getNumArgs()) {
-      if (DefInit *Constraint = dyn_cast<DefInit>(ConstraintList->getArg(i))) {
-        return Constraint->getDef()->isSubClassOf("TypedOperand") &&
-               Constraint->getDef()->getValueAsBit("IsPointer");
-      }
-    }
-  }
-  return false;
-}
-
-//===----------------------------------------------------------------------===//
-/// CodeGenInstAlias Implementation
-//===----------------------------------------------------------------------===//
-
-/// tryAliasOpMatch - This is a helper function for the CodeGenInstAlias
-/// constructor.  It checks if an argument in an InstAlias pattern matches
-/// the corresponding operand of the instruction.  It returns true on a
-/// successful match, with ResOp set to the result operand to be used.
-bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo,
-                                       Record *InstOpRec, bool hasSubOps,
-                                       ArrayRef<SMLoc> Loc, CodeGenTarget &T,
-                                       ResultOperand &ResOp) {
-  Init *Arg = Result->getArg(AliasOpNo);
-  DefInit *ADI = dyn_cast<DefInit>(Arg);
-  Record *ResultRecord = ADI ? ADI->getDef() : nullptr;
-
-  if (ADI && ADI->getDef() == InstOpRec) {
-    // If the operand is a record, it must have a name, and the record type
-    // must match up with the instruction's argument type.
-    if (!Result->getArgName(AliasOpNo))
-      PrintFatalError(Loc, "result argument #" + Twine(AliasOpNo) +
-                           " must have a name!");
-    ResOp = ResultOperand(Result->getArgNameStr(AliasOpNo), ResultRecord);
-    return true;
-  }
-
-  // For register operands, the source register class can be a subclass
-  // of the instruction register class, not just an exact match.
-  if (InstOpRec->isSubClassOf("RegisterOperand"))
-    InstOpRec = InstOpRec->getValueAsDef("RegClass");
-
-  if (ADI && ADI->getDef()->isSubClassOf("RegisterOperand"))
-    ADI = ADI->getDef()->getValueAsDef("RegClass")->getDefInit();
-
-  if (ADI && ADI->getDef()->isSubClassOf("RegisterClass")) {
-    if (!InstOpRec->isSubClassOf("RegisterClass"))
-      return false;
-    if (!T.getRegisterClass(InstOpRec)
-              .hasSubClass(&T.getRegisterClass(ADI->getDef())))
-      return false;
-    ResOp = ResultOperand(Result->getArgNameStr(AliasOpNo), ResultRecord);
-    return true;
-  }
-
-  // Handle explicit registers.
-  if (ADI && ADI->getDef()->isSubClassOf("Register")) {
-    if (InstOpRec->isSubClassOf("OptionalDefOperand")) {
-      DagInit *DI = InstOpRec->getValueAsDag("MIOperandInfo");
-      // The operand info should only have a single (register) entry. We
-      // want the register class of it.
-      InstOpRec = cast<DefInit>(DI->getArg(0))->getDef();
-    }
-
-    if (!InstOpRec->isSubClassOf("RegisterClass"))
-      return false;
-
-    if (!T.getRegisterClass(InstOpRec)
-        .contains(T.getRegBank().getReg(ADI->getDef())))
-      PrintFatalError(Loc, "fixed register " + ADI->getDef()->getName() +
-                      " is not a member of the " + InstOpRec->getName() +
-                      " register class!");
-
-    if (Result->getArgName(AliasOpNo))
-      PrintFatalError(Loc, "result fixed register argument must "
-                      "not have a name!");
-
-    ResOp = ResultOperand(ResultRecord);
-    return true;
-  }
-
-  // Handle "zero_reg" for optional def operands.
-  if (ADI && ADI->getDef()->getName() == "zero_reg") {
-
-    // Check if this is an optional def.
-    // Tied operands where the source is a sub-operand of a complex operand
-    // need to represent both operands in the alias destination instruction.
-    // Allow zero_reg for the tied portion. This can and should go away once
-    // the MC representation of things doesn't use tied operands at all.
-    //if (!InstOpRec->isSubClassOf("OptionalDefOperand"))
-    //  throw TGError(Loc, "reg0 used for result that is not an "
-    //                "OptionalDefOperand!");
-
-    ResOp = ResultOperand(static_cast<Record*>(nullptr));
-    return true;
-  }
-
-  // Literal integers.
-  if (IntInit *II = dyn_cast<IntInit>(Arg)) {
-    if (hasSubOps || !InstOpRec->isSubClassOf("Operand"))
-      return false;
-    // Integer arguments can't have names.
-    if (Result->getArgName(AliasOpNo))
-      PrintFatalError(Loc, "result argument #" + Twine(AliasOpNo) +
-                      " must not have a name!");
-    ResOp = ResultOperand(II->getValue());
-    return true;
-  }
-
-  // Bits<n> (also used for 0bxx literals)
-  if (BitsInit *BI = dyn_cast<BitsInit>(Arg)) {
-    if (hasSubOps || !InstOpRec->isSubClassOf("Operand"))
-      return false;
-    if (!BI->isComplete())
-      return false;
-    // Convert the bits init to an integer and use that for the result.
-    IntInit *II =
-      dyn_cast_or_null<IntInit>(BI->convertInitializerTo(IntRecTy::get()));
-    if (!II)
-      return false;
-    ResOp = ResultOperand(II->getValue());
-    return true;
-  }
-
-  // If both are Operands with the same MVT, allow the conversion. It's
-  // up to the user to make sure the values are appropriate, just like
-  // for isel Pat's.
-  if (InstOpRec->isSubClassOf("Operand") && ADI &&
-      ADI->getDef()->isSubClassOf("Operand")) {
-    // FIXME: What other attributes should we check here? Identical
-    // MIOperandInfo perhaps?
-    if (InstOpRec->getValueInit("Type") != ADI->getDef()->getValueInit("Type"))
-      return false;
-    ResOp = ResultOperand(Result->getArgNameStr(AliasOpNo), ADI->getDef());
-    return true;
-  }
-
-  return false;
-}
-
-unsigned CodeGenInstAlias::ResultOperand::getMINumOperands() const {
-  if (!isRecord())
-    return 1;
-
-  Record *Rec = getRecord();
-  if (!Rec->isSubClassOf("Operand"))
-    return 1;
-
-  DagInit *MIOpInfo = Rec->getValueAsDag("MIOperandInfo");
-  if (MIOpInfo->getNumArgs() == 0) {
-    // Unspecified, so it defaults to 1
-    return 1;
-  }
-
-  return MIOpInfo->getNumArgs();
-}
-
-CodeGenInstAlias::CodeGenInstAlias(Record *R, CodeGenTarget &T)
-    : TheDef(R) {
-  Result = R->getValueAsDag("ResultInst");
-  AsmString = R->getValueAsString("AsmString");
-
-
-  // Verify that the root of the result is an instruction.
-  DefInit *DI = dyn_cast<DefInit>(Result->getOperator());
-  if (!DI || !DI->getDef()->isSubClassOf("Instruction"))
-    PrintFatalError(R->getLoc(),
-                    "result of inst alias should be an instruction");
-
-  ResultInst = &T.getInstruction(DI->getDef());
-
-  // NameClass - If argument names are repeated, we need to verify they have
-  // the same class.
-  StringMap<Record*> NameClass;
-  for (unsigned i = 0, e = Result->getNumArgs(); i != e; ++i) {
-    DefInit *ADI = dyn_cast<DefInit>(Result->getArg(i));
-    if (!ADI || !Result->getArgName(i))
-      continue;
-    // Verify we don't have something like: (someinst GR16:$foo, GR32:$foo)
-    // $foo can exist multiple times in the result list, but it must have the
-    // same type.
-    Record *&Entry = NameClass[Result->getArgNameStr(i)];
-    if (Entry && Entry != ADI->getDef())
-      PrintFatalError(R->getLoc(), "result value $" + Result->getArgNameStr(i) +
-                      " is both " + Entry->getName() + " and " +
-                      ADI->getDef()->getName() + "!");
-    Entry = ADI->getDef();
-  }
-
-  // Decode and validate the arguments of the result.
-  unsigned AliasOpNo = 0;
-  for (unsigned i = 0, e = ResultInst->Operands.size(); i != e; ++i) {
-
-    // Tied registers don't have an entry in the result dag unless they're part
-    // of a complex operand, in which case we include them anyways, as we
-    // don't have any other way to specify the whole operand.
-    if (ResultInst->Operands[i].MINumOperands == 1 &&
-        ResultInst->Operands[i].getTiedRegister() != -1) {
-      // Tied operands of different RegisterClass should be explicit within an
-      // instruction's syntax and so cannot be skipped.
-      int TiedOpNum = ResultInst->Operands[i].getTiedRegister();
-      if (ResultInst->Operands[i].Rec->getName() ==
-          ResultInst->Operands[TiedOpNum].Rec->getName())
-        continue;
-    }
-
-    if (AliasOpNo >= Result->getNumArgs())
-      PrintFatalError(R->getLoc(), "not enough arguments for instruction!");
-
-    Record *InstOpRec = ResultInst->Operands[i].Rec;
-    unsigned NumSubOps = ResultInst->Operands[i].MINumOperands;
-    ResultOperand ResOp(static_cast<int64_t>(0));
-    if (tryAliasOpMatch(Result, AliasOpNo, InstOpRec, (NumSubOps > 1),
-                        R->getLoc(), T, ResOp)) {
-      // If this is a simple operand, or a complex operand with a custom match
-      // class, then we can match is verbatim.
-      if (NumSubOps == 1 ||
-          (InstOpRec->getValue("ParserMatchClass") &&
-           InstOpRec->getValueAsDef("ParserMatchClass")
-             ->getValueAsString("Name") != "Imm")) {
-        ResultOperands.push_back(ResOp);
-        ResultInstOperandIndex.push_back(std::make_pair(i, -1));
-        ++AliasOpNo;
-
-      // Otherwise, we need to match each of the suboperands individually.
-      } else {
-         DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo;
-         for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) {
-          Record *SubRec = cast<DefInit>(MIOI->getArg(SubOp))->getDef();
-
-          // Take care to instantiate each of the suboperands with the correct
-          // nomenclature: $foo.bar
-          ResultOperands.emplace_back(
-            Result->getArgName(AliasOpNo)->getAsUnquotedString() + "." +
-            MIOI->getArgName(SubOp)->getAsUnquotedString(), SubRec);
-          ResultInstOperandIndex.push_back(std::make_pair(i, SubOp));
-         }
-         ++AliasOpNo;
-      }
-      continue;
-    }
-
-    // If the argument did not match the instruction operand, and the operand
-    // is composed of multiple suboperands, try matching the suboperands.
-    if (NumSubOps > 1) {
-      DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo;
-      for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) {
-        if (AliasOpNo >= Result->getNumArgs())
-          PrintFatalError(R->getLoc(), "not enough arguments for instruction!");
-        Record *SubRec = cast<DefInit>(MIOI->getArg(SubOp))->getDef();
-        if (tryAliasOpMatch(Result, AliasOpNo, SubRec, false,
-                            R->getLoc(), T, ResOp)) {
-          ResultOperands.push_back(ResOp);
-          ResultInstOperandIndex.push_back(std::make_pair(i, SubOp));
-          ++AliasOpNo;
-        } else {
-          PrintFatalError(R->getLoc(), "result argument #" + Twine(AliasOpNo) +
-                        " does not match instruction operand class " +
-                        (SubOp == 0 ? InstOpRec->getName() :SubRec->getName()));
-        }
-      }
-      continue;
-    }
-    PrintFatalError(R->getLoc(), "result argument #" + Twine(AliasOpNo) +
-                    " does not match instruction operand class " +
-                    InstOpRec->getName());
-  }
-
-  if (AliasOpNo != Result->getNumArgs())
-    PrintFatalError(R->getLoc(), "too many operands for instruction!");
-}