1 files changed, 815 insertions, 0 deletions

diff --git a/contrib/llvm-project/clang/lib/Basic/TargetInfo.cpp b/contrib/llvm-project/clang/lib/Basic/TargetInfo.cpp
new file mode 100644
index 000000000000..a9dfe69b90c5
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Basic/TargetInfo.cpp
@@ -0,0 +1,815 @@
+//===--- TargetInfo.cpp - Information about Target machine ----------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file implements the TargetInfo and TargetInfoImpl interfaces.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Basic/AddressSpaces.h"
+#include "clang/Basic/CharInfo.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/LangOptions.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/TargetParser.h"
+#include <cstdlib>
+using namespace clang;
+
+static const LangASMap DefaultAddrSpaceMap = {0};
+
+// TargetInfo Constructor.
+TargetInfo::TargetInfo(const llvm::Triple &T) : TargetOpts(), Triple(T) {
+  // Set defaults.  Defaults are set for a 32-bit RISC platform, like PPC or
+  // SPARC.  These should be overridden by concrete targets as needed.
+  BigEndian = !T.isLittleEndian();
+  TLSSupported = true;
+  VLASupported = true;
+  NoAsmVariants = false;
+  HasLegalHalfType = false;
+  HasFloat128 = false;
+  HasFloat16 = false;
+  PointerWidth = PointerAlign = 32;
+  BoolWidth = BoolAlign = 8;
+  IntWidth = IntAlign = 32;
+  LongWidth = LongAlign = 32;
+  LongLongWidth = LongLongAlign = 64;
+
+  // Fixed point default bit widths
+  ShortAccumWidth = ShortAccumAlign = 16;
+  AccumWidth = AccumAlign = 32;
+  LongAccumWidth = LongAccumAlign = 64;
+  ShortFractWidth = ShortFractAlign = 8;
+  FractWidth = FractAlign = 16;
+  LongFractWidth = LongFractAlign = 32;
+
+  // Fixed point default integral and fractional bit sizes
+  // We give the _Accum 1 fewer fractional bits than their corresponding _Fract
+  // types by default to have the same number of fractional bits between _Accum
+  // and _Fract types.
+  PaddingOnUnsignedFixedPoint = false;
+  ShortAccumScale = 7;
+  AccumScale = 15;
+  LongAccumScale = 31;
+
+  SuitableAlign = 64;
+  DefaultAlignForAttributeAligned = 128;
+  MinGlobalAlign = 0;
+  // From the glibc documentation, on GNU systems, malloc guarantees 16-byte
+  // alignment on 64-bit systems and 8-byte alignment on 32-bit systems. See
+  // https://www.gnu.org/software/libc/manual/html_node/Malloc-Examples.html.
+  // This alignment guarantee also applies to Windows and Android.
+  if (T.isGNUEnvironment() || T.isWindowsMSVCEnvironment() || T.isAndroid())
+    NewAlign = Triple.isArch64Bit() ? 128 : Triple.isArch32Bit() ? 64 : 0;
+  else
+    NewAlign = 0; // Infer from basic type alignment.
+  HalfWidth = 16;
+  HalfAlign = 16;
+  FloatWidth = 32;
+  FloatAlign = 32;
+  DoubleWidth = 64;
+  DoubleAlign = 64;
+  LongDoubleWidth = 64;
+  LongDoubleAlign = 64;
+  Float128Align = 128;
+  LargeArrayMinWidth = 0;
+  LargeArrayAlign = 0;
+  MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 0;
+  MaxVectorAlign = 0;
+  MaxTLSAlign = 0;
+  SimdDefaultAlign = 0;
+  SizeType = UnsignedLong;
+  PtrDiffType = SignedLong;
+  IntMaxType = SignedLongLong;
+  IntPtrType = SignedLong;
+  WCharType = SignedInt;
+  WIntType = SignedInt;
+  Char16Type = UnsignedShort;
+  Char32Type = UnsignedInt;
+  Int64Type = SignedLongLong;
+  SigAtomicType = SignedInt;
+  ProcessIDType = SignedInt;
+  UseSignedCharForObjCBool = true;
+  UseBitFieldTypeAlignment = true;
+  UseZeroLengthBitfieldAlignment = false;
+  UseExplicitBitFieldAlignment = true;
+  ZeroLengthBitfieldBoundary = 0;
+  HalfFormat = &llvm::APFloat::IEEEhalf();
+  FloatFormat = &llvm::APFloat::IEEEsingle();
+  DoubleFormat = &llvm::APFloat::IEEEdouble();
+  LongDoubleFormat = &llvm::APFloat::IEEEdouble();
+  Float128Format = &llvm::APFloat::IEEEquad();
+  MCountName = "mcount";
+  RegParmMax = 0;
+  SSERegParmMax = 0;
+  HasAlignMac68kSupport = false;
+  HasBuiltinMSVaList = false;
+  IsRenderScriptTarget = false;
+
+  // Default to no types using fpret.
+  RealTypeUsesObjCFPRet = 0;
+
+  // Default to not using fp2ret for __Complex long double
+  ComplexLongDoubleUsesFP2Ret = false;
+
+  // Set the C++ ABI based on the triple.
+  TheCXXABI.set(Triple.isKnownWindowsMSVCEnvironment()
+                    ? TargetCXXABI::Microsoft
+                    : TargetCXXABI::GenericItanium);
+
+  // Default to an empty address space map.
+  AddrSpaceMap = &DefaultAddrSpaceMap;
+  UseAddrSpaceMapMangling = false;
+
+  // Default to an unknown platform name.
+  PlatformName = "unknown";
+  PlatformMinVersion = VersionTuple();
+}
+
+// Out of line virtual dtor for TargetInfo.
+TargetInfo::~TargetInfo() {}
+
+bool
+TargetInfo::checkCFProtectionBranchSupported(DiagnosticsEngine &Diags) const {
+  Diags.Report(diag::err_opt_not_valid_on_target) << "cf-protection=branch";
+  return false;
+}
+
+bool
+TargetInfo::checkCFProtectionReturnSupported(DiagnosticsEngine &Diags) const {
+  Diags.Report(diag::err_opt_not_valid_on_target) << "cf-protection=return";
+  return false;
+}
+
+/// getTypeName - Return the user string for the specified integer type enum.
+/// For example, SignedShort -> "short".
+const char *TargetInfo::getTypeName(IntType T) {
+  switch (T) {
+  default: llvm_unreachable("not an integer!");
+  case SignedChar:       return "signed char";
+  case UnsignedChar:     return "unsigned char";
+  case SignedShort:      return "short";
+  case UnsignedShort:    return "unsigned short";
+  case SignedInt:        return "int";
+  case UnsignedInt:      return "unsigned int";
+  case SignedLong:       return "long int";
+  case UnsignedLong:     return "long unsigned int";
+  case SignedLongLong:   return "long long int";
+  case UnsignedLongLong: return "long long unsigned int";
+  }
+}
+
+/// getTypeConstantSuffix - Return the constant suffix for the specified
+/// integer type enum. For example, SignedLong -> "L".
+const char *TargetInfo::getTypeConstantSuffix(IntType T) const {
+  switch (T) {
+  default: llvm_unreachable("not an integer!");
+  case SignedChar:
+  case SignedShort:
+  case SignedInt:        return "";
+  case SignedLong:       return "L";
+  case SignedLongLong:   return "LL";
+  case UnsignedChar:
+    if (getCharWidth() < getIntWidth())
+      return "";
+    LLVM_FALLTHROUGH;
+  case UnsignedShort:
+    if (getShortWidth() < getIntWidth())
+      return "";
+    LLVM_FALLTHROUGH;
+  case UnsignedInt:      return "U";
+  case UnsignedLong:     return "UL";
+  case UnsignedLongLong: return "ULL";
+  }
+}
+
+/// getTypeFormatModifier - Return the printf format modifier for the
+/// specified integer type enum. For example, SignedLong -> "l".
+
+const char *TargetInfo::getTypeFormatModifier(IntType T) {
+  switch (T) {
+  default: llvm_unreachable("not an integer!");
+  case SignedChar:
+  case UnsignedChar:     return "hh";
+  case SignedShort:
+  case UnsignedShort:    return "h";
+  case SignedInt:
+  case UnsignedInt:      return "";
+  case SignedLong:
+  case UnsignedLong:     return "l";
+  case SignedLongLong:
+  case UnsignedLongLong: return "ll";
+  }
+}
+
+/// getTypeWidth - Return the width (in bits) of the specified integer type
+/// enum. For example, SignedInt -> getIntWidth().
+unsigned TargetInfo::getTypeWidth(IntType T) const {
+  switch (T) {
+  default: llvm_unreachable("not an integer!");
+  case SignedChar:
+  case UnsignedChar:     return getCharWidth();
+  case SignedShort:
+  case UnsignedShort:    return getShortWidth();
+  case SignedInt:
+  case UnsignedInt:      return getIntWidth();
+  case SignedLong:
+  case UnsignedLong:     return getLongWidth();
+  case SignedLongLong:
+  case UnsignedLongLong: return getLongLongWidth();
+  };
+}
+
+TargetInfo::IntType TargetInfo::getIntTypeByWidth(
+    unsigned BitWidth, bool IsSigned) const {
+  if (getCharWidth() == BitWidth)
+    return IsSigned ? SignedChar : UnsignedChar;
+  if (getShortWidth() == BitWidth)
+    return IsSigned ? SignedShort : UnsignedShort;
+  if (getIntWidth() == BitWidth)
+    return IsSigned ? SignedInt : UnsignedInt;
+  if (getLongWidth() == BitWidth)
+    return IsSigned ? SignedLong : UnsignedLong;
+  if (getLongLongWidth() == BitWidth)
+    return IsSigned ? SignedLongLong : UnsignedLongLong;
+  return NoInt;
+}
+
+TargetInfo::IntType TargetInfo::getLeastIntTypeByWidth(unsigned BitWidth,
+                                                       bool IsSigned) const {
+  if (getCharWidth() >= BitWidth)
+    return IsSigned ? SignedChar : UnsignedChar;
+  if (getShortWidth() >= BitWidth)
+    return IsSigned ? SignedShort : UnsignedShort;
+  if (getIntWidth() >= BitWidth)
+    return IsSigned ? SignedInt : UnsignedInt;
+  if (getLongWidth() >= BitWidth)
+    return IsSigned ? SignedLong : UnsignedLong;
+  if (getLongLongWidth() >= BitWidth)
+    return IsSigned ? SignedLongLong : UnsignedLongLong;
+  return NoInt;
+}
+
+TargetInfo::RealType TargetInfo::getRealTypeByWidth(unsigned BitWidth) const {
+  if (getFloatWidth() == BitWidth)
+    return Float;
+  if (getDoubleWidth() == BitWidth)
+    return Double;
+
+  switch (BitWidth) {
+  case 96:
+    if (&getLongDoubleFormat() == &llvm::APFloat::x87DoubleExtended())
+      return LongDouble;
+    break;
+  case 128:
+    if (&getLongDoubleFormat() == &llvm::APFloat::PPCDoubleDouble() ||
+        &getLongDoubleFormat() == &llvm::APFloat::IEEEquad())
+      return LongDouble;
+    if (hasFloat128Type())
+      return Float128;
+    break;
+  }
+
+  return NoFloat;
+}
+
+/// getTypeAlign - Return the alignment (in bits) of the specified integer type
+/// enum. For example, SignedInt -> getIntAlign().
+unsigned TargetInfo::getTypeAlign(IntType T) const {
+  switch (T) {
+  default: llvm_unreachable("not an integer!");
+  case SignedChar:
+  case UnsignedChar:     return getCharAlign();
+  case SignedShort:
+  case UnsignedShort:    return getShortAlign();
+  case SignedInt:
+  case UnsignedInt:      return getIntAlign();
+  case SignedLong:
+  case UnsignedLong:     return getLongAlign();
+  case SignedLongLong:
+  case UnsignedLongLong: return getLongLongAlign();
+  };
+}
+
+/// isTypeSigned - Return whether an integer types is signed. Returns true if
+/// the type is signed; false otherwise.
+bool TargetInfo::isTypeSigned(IntType T) {
+  switch (T) {
+  default: llvm_unreachable("not an integer!");
+  case SignedChar:
+  case SignedShort:
+  case SignedInt:
+  case SignedLong:
+  case SignedLongLong:
+    return true;
+  case UnsignedChar:
+  case UnsignedShort:
+  case UnsignedInt:
+  case UnsignedLong:
+  case UnsignedLongLong:
+    return false;
+  };
+}
+
+/// adjust - Set forced language options.
+/// Apply changes to the target information with respect to certain
+/// language options which change the target configuration and adjust
+/// the language based on the target options where applicable.
+void TargetInfo::adjust(LangOptions &Opts) {
+  if (Opts.NoBitFieldTypeAlign)
+    UseBitFieldTypeAlignment = false;
+
+  switch (Opts.WCharSize) {
+  default: llvm_unreachable("invalid wchar_t width");
+  case 0: break;
+  case 1: WCharType = Opts.WCharIsSigned ? SignedChar : UnsignedChar; break;
+  case 2: WCharType = Opts.WCharIsSigned ? SignedShort : UnsignedShort; break;
+  case 4: WCharType = Opts.WCharIsSigned ? SignedInt : UnsignedInt; break;
+  }
+
+  if (Opts.AlignDouble) {
+    DoubleAlign = LongLongAlign = 64;
+    LongDoubleAlign = 64;
+  }
+
+  if (Opts.OpenCL) {
+    // OpenCL C requires specific widths for types, irrespective of
+    // what these normally are for the target.
+    // We also define long long and long double here, although the
+    // OpenCL standard only mentions these as "reserved".
+    IntWidth = IntAlign = 32;
+    LongWidth = LongAlign = 64;
+    LongLongWidth = LongLongAlign = 128;
+    HalfWidth = HalfAlign = 16;
+    FloatWidth = FloatAlign = 32;
+
+    // Embedded 32-bit targets (OpenCL EP) might have double C type
+    // defined as float. Let's not override this as it might lead
+    // to generating illegal code that uses 64bit doubles.
+    if (DoubleWidth != FloatWidth) {
+      DoubleWidth = DoubleAlign = 64;
+      DoubleFormat = &llvm::APFloat::IEEEdouble();
+    }
+    LongDoubleWidth = LongDoubleAlign = 128;
+
+    unsigned MaxPointerWidth = getMaxPointerWidth();
+    assert(MaxPointerWidth == 32 || MaxPointerWidth == 64);
+    bool Is32BitArch = MaxPointerWidth == 32;
+    SizeType = Is32BitArch ? UnsignedInt : UnsignedLong;
+    PtrDiffType = Is32BitArch ? SignedInt : SignedLong;
+    IntPtrType = Is32BitArch ? SignedInt : SignedLong;
+
+    IntMaxType = SignedLongLong;
+    Int64Type = SignedLong;
+
+    HalfFormat = &llvm::APFloat::IEEEhalf();
+    FloatFormat = &llvm::APFloat::IEEEsingle();
+    LongDoubleFormat = &llvm::APFloat::IEEEquad();
+  }
+
+  if (Opts.LongDoubleSize) {
+    if (Opts.LongDoubleSize == DoubleWidth) {
+      LongDoubleWidth = DoubleWidth;
+      LongDoubleAlign = DoubleAlign;
+      LongDoubleFormat = DoubleFormat;
+    } else if (Opts.LongDoubleSize == 128) {
+      LongDoubleWidth = LongDoubleAlign = 128;
+      LongDoubleFormat = &llvm::APFloat::IEEEquad();
+    }
+  }
+
+  if (Opts.NewAlignOverride)
+    NewAlign = Opts.NewAlignOverride * getCharWidth();
+
+  // Each unsigned fixed point type has the same number of fractional bits as
+  // its corresponding signed type.
+  PaddingOnUnsignedFixedPoint |= Opts.PaddingOnUnsignedFixedPoint;
+  CheckFixedPointBits();
+}
+
+bool TargetInfo::initFeatureMap(
+    llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags, StringRef CPU,
+    const std::vector<std::string> &FeatureVec) const {
+  for (const auto &F : FeatureVec) {
+    StringRef Name = F;
+    // Apply the feature via the target.
+    bool Enabled = Name[0] == '+';
+    setFeatureEnabled(Features, Name.substr(1), Enabled);
+  }
+  return true;
+}
+
+TargetInfo::CallingConvKind
+TargetInfo::getCallingConvKind(bool ClangABICompat4) const {
+  if (getCXXABI() != TargetCXXABI::Microsoft &&
+      (ClangABICompat4 || getTriple().getOS() == llvm::Triple::PS4))
+    return CCK_ClangABI4OrPS4;
+  return CCK_Default;
+}
+
+LangAS TargetInfo::getOpenCLTypeAddrSpace(OpenCLTypeKind TK) const {
+  switch (TK) {
+  case OCLTK_Image:
+  case OCLTK_Pipe:
+    return LangAS::opencl_global;
+
+  case OCLTK_Sampler:
+    return LangAS::opencl_constant;
+
+  default:
+    return LangAS::Default;
+  }
+}
+
+//===----------------------------------------------------------------------===//
+
+
+static StringRef removeGCCRegisterPrefix(StringRef Name) {
+  if (Name[0] == '%' || Name[0] == '#')
+    Name = Name.substr(1);
+
+  return Name;
+}
+
+/// isValidClobber - Returns whether the passed in string is
+/// a valid clobber in an inline asm statement. This is used by
+/// Sema.
+bool TargetInfo::isValidClobber(StringRef Name) const {
+  return (isValidGCCRegisterName(Name) ||
+          Name == "memory" || Name == "cc");
+}
+
+/// isValidGCCRegisterName - Returns whether the passed in string
+/// is a valid register name according to GCC. This is used by Sema for
+/// inline asm statements.
+bool TargetInfo::isValidGCCRegisterName(StringRef Name) const {
+  if (Name.empty())
+    return false;
+
+  // Get rid of any register prefix.
+  Name = removeGCCRegisterPrefix(Name);
+  if (Name.empty())
+    return false;
+
+  ArrayRef<const char *> Names = getGCCRegNames();
+
+  // If we have a number it maps to an entry in the register name array.
+  if (isDigit(Name[0])) {
+    unsigned n;
+    if (!Name.getAsInteger(0, n))
+      return n < Names.size();
+  }
+
+  // Check register names.
+  if (llvm::is_contained(Names, Name))
+    return true;
+
+  // Check any additional names that we have.
+  for (const AddlRegName &ARN : getGCCAddlRegNames())
+    for (const char *AN : ARN.Names) {
+      if (!AN)
+        break;
+      // Make sure the register that the additional name is for is within
+      // the bounds of the register names from above.
+      if (AN == Name && ARN.RegNum < Names.size())
+        return true;
+    }
+
+  // Now check aliases.
+  for (const GCCRegAlias &GRA : getGCCRegAliases())
+    for (const char *A : GRA.Aliases) {
+      if (!A)
+        break;
+      if (A == Name)
+        return true;
+    }
+
+  return false;
+}
+
+StringRef TargetInfo::getNormalizedGCCRegisterName(StringRef Name,
+                                                   bool ReturnCanonical) const {
+  assert(isValidGCCRegisterName(Name) && "Invalid register passed in");
+
+  // Get rid of any register prefix.
+  Name = removeGCCRegisterPrefix(Name);
+
+  ArrayRef<const char *> Names = getGCCRegNames();
+
+  // First, check if we have a number.
+  if (isDigit(Name[0])) {
+    unsigned n;
+    if (!Name.getAsInteger(0, n)) {
+      assert(n < Names.size() && "Out of bounds register number!");
+      return Names[n];
+    }
+  }
+
+  // Check any additional names that we have.
+  for (const AddlRegName &ARN : getGCCAddlRegNames())
+    for (const char *AN : ARN.Names) {
+      if (!AN)
+        break;
+      // Make sure the register that the additional name is for is within
+      // the bounds of the register names from above.
+      if (AN == Name && ARN.RegNum < Names.size())
+        return ReturnCanonical ? Names[ARN.RegNum] : Name;
+    }
+
+  // Now check aliases.
+  for (const GCCRegAlias &RA : getGCCRegAliases())
+    for (const char *A : RA.Aliases) {
+      if (!A)
+        break;
+      if (A == Name)
+        return RA.Register;
+    }
+
+  return Name;
+}
+
+bool TargetInfo::validateOutputConstraint(ConstraintInfo &Info) const {
+  const char *Name = Info.getConstraintStr().c_str();
+  // An output constraint must start with '=' or '+'
+  if (*Name != '=' && *Name != '+')
+    return false;
+
+  if (*Name == '+')
+    Info.setIsReadWrite();
+
+  Name++;
+  while (*Name) {
+    switch (*Name) {
+    default:
+      if (!validateAsmConstraint(Name, Info)) {
+        // FIXME: We temporarily return false
+        // so we can add more constraints as we hit it.
+        // Eventually, an unknown constraint should just be treated as 'g'.
+        return false;
+      }
+      break;
+    case '&': // early clobber.
+      Info.setEarlyClobber();
+      break;
+    case '%': // commutative.
+      // FIXME: Check that there is a another register after this one.
+      break;
+    case 'r': // general register.
+      Info.setAllowsRegister();
+      break;
+    case 'm': // memory operand.
+    case 'o': // offsetable memory operand.
+    case 'V': // non-offsetable memory operand.
+    case '<': // autodecrement memory operand.
+    case '>': // autoincrement memory operand.
+      Info.setAllowsMemory();
+      break;
+    case 'g': // general register, memory operand or immediate integer.
+    case 'X': // any operand.
+      Info.setAllowsRegister();
+      Info.setAllowsMemory();
+      break;
+    case ',': // multiple alternative constraint.  Pass it.
+      // Handle additional optional '=' or '+' modifiers.
+      if (Name[1] == '=' || Name[1] == '+')
+        Name++;
+      break;
+    case '#': // Ignore as constraint.
+      while (Name[1] && Name[1] != ',')
+        Name++;
+      break;
+    case '?': // Disparage slightly code.
+    case '!': // Disparage severely.
+    case '*': // Ignore for choosing register preferences.
+    case 'i': // Ignore i,n,E,F as output constraints (match from the other
+              // chars)
+    case 'n':
+    case 'E':
+    case 'F':
+      break;  // Pass them.
+    }
+
+    Name++;
+  }
+
+  // Early clobber with a read-write constraint which doesn't permit registers
+  // is invalid.
+  if (Info.earlyClobber() && Info.isReadWrite() && !Info.allowsRegister())
+    return false;
+
+  // If a constraint allows neither memory nor register operands it contains
+  // only modifiers. Reject it.
+  return Info.allowsMemory() || Info.allowsRegister();
+}
+
+bool TargetInfo::resolveSymbolicName(const char *&Name,
+                                     ArrayRef<ConstraintInfo> OutputConstraints,
+                                     unsigned &Index) const {
+  assert(*Name == '[' && "Symbolic name did not start with '['");
+  Name++;
+  const char *Start = Name;
+  while (*Name && *Name != ']')
+    Name++;
+
+  if (!*Name) {
+    // Missing ']'
+    return false;
+  }
+
+  std::string SymbolicName(Start, Name - Start);
+
+  for (Index = 0; Index != OutputConstraints.size(); ++Index)
+    if (SymbolicName == OutputConstraints[Index].getName())
+      return true;
+
+  return false;
+}
+
+bool TargetInfo::validateInputConstraint(
+                              MutableArrayRef<ConstraintInfo> OutputConstraints,
+                              ConstraintInfo &Info) const {
+  const char *Name = Info.ConstraintStr.c_str();
+
+  if (!*Name)
+    return false;
+
+  while (*Name) {
+    switch (*Name) {
+    default:
+      // Check if we have a matching constraint
+      if (*Name >= '0' && *Name <= '9') {
+        const char *DigitStart = Name;
+        while (Name[1] >= '0' && Name[1] <= '9')
+          Name++;
+        const char *DigitEnd = Name;
+        unsigned i;
+        if (StringRef(DigitStart, DigitEnd - DigitStart + 1)
+                .getAsInteger(10, i))
+          return false;
+
+        // Check if matching constraint is out of bounds.
+        if (i >= OutputConstraints.size()) return false;
+
+        // A number must refer to an output only operand.
+        if (OutputConstraints[i].isReadWrite())
+          return false;
+
+        // If the constraint is already tied, it must be tied to the
+        // same operand referenced to by the number.
+        if (Info.hasTiedOperand() && Info.getTiedOperand() != i)
+          return false;
+
+        // The constraint should have the same info as the respective
+        // output constraint.
+        Info.setTiedOperand(i, OutputConstraints[i]);
+      } else if (!validateAsmConstraint(Name, Info)) {
+        // FIXME: This error return is in place temporarily so we can
+        // add more constraints as we hit it.  Eventually, an unknown
+        // constraint should just be treated as 'g'.
+        return false;
+      }
+      break;
+    case '[': {
+      unsigned Index = 0;
+      if (!resolveSymbolicName(Name, OutputConstraints, Index))
+        return false;
+
+      // If the constraint is already tied, it must be tied to the
+      // same operand referenced to by the number.
+      if (Info.hasTiedOperand() && Info.getTiedOperand() != Index)
+        return false;
+
+      // A number must refer to an output only operand.
+      if (OutputConstraints[Index].isReadWrite())
+        return false;
+
+      Info.setTiedOperand(Index, OutputConstraints[Index]);
+      break;
+    }
+    case '%': // commutative
+      // FIXME: Fail if % is used with the last operand.
+      break;
+    case 'i': // immediate integer.
+      break;
+    case 'n': // immediate integer with a known value.
+      Info.setRequiresImmediate();
+      break;
+    case 'I':  // Various constant constraints with target-specific meanings.
+    case 'J':
+    case 'K':
+    case 'L':
+    case 'M':
+    case 'N':
+    case 'O':
+    case 'P':
+      if (!validateAsmConstraint(Name, Info))
+        return false;
+      break;
+    case 'r': // general register.
+      Info.setAllowsRegister();
+      break;
+    case 'm': // memory operand.
+    case 'o': // offsettable memory operand.
+    case 'V': // non-offsettable memory operand.
+    case '<': // autodecrement memory operand.
+    case '>': // autoincrement memory operand.
+      Info.setAllowsMemory();
+      break;
+    case 'g': // general register, memory operand or immediate integer.
+    case 'X': // any operand.
+      Info.setAllowsRegister();
+      Info.setAllowsMemory();
+      break;
+    case 'E': // immediate floating point.
+    case 'F': // immediate floating point.
+    case 'p': // address operand.
+      break;
+    case ',': // multiple alternative constraint.  Ignore comma.
+      break;
+    case '#': // Ignore as constraint.
+      while (Name[1] && Name[1] != ',')
+        Name++;
+      break;
+    case '?': // Disparage slightly code.
+    case '!': // Disparage severely.
+    case '*': // Ignore for choosing register preferences.
+      break;  // Pass them.
+    }
+
+    Name++;
+  }
+
+  return true;
+}
+
+void TargetInfo::CheckFixedPointBits() const {
+  // Check that the number of fractional and integral bits (and maybe sign) can
+  // fit into the bits given for a fixed point type.
+  assert(ShortAccumScale + getShortAccumIBits() + 1 <= ShortAccumWidth);
+  assert(AccumScale + getAccumIBits() + 1 <= AccumWidth);
+  assert(LongAccumScale + getLongAccumIBits() + 1 <= LongAccumWidth);
+  assert(getUnsignedShortAccumScale() + getUnsignedShortAccumIBits() <=
+         ShortAccumWidth);
+  assert(getUnsignedAccumScale() + getUnsignedAccumIBits() <= AccumWidth);
+  assert(getUnsignedLongAccumScale() + getUnsignedLongAccumIBits() <=
+         LongAccumWidth);
+
+  assert(getShortFractScale() + 1 <= ShortFractWidth);
+  assert(getFractScale() + 1 <= FractWidth);
+  assert(getLongFractScale() + 1 <= LongFractWidth);
+  assert(getUnsignedShortFractScale() <= ShortFractWidth);
+  assert(getUnsignedFractScale() <= FractWidth);
+  assert(getUnsignedLongFractScale() <= LongFractWidth);
+
+  // Each unsigned fract type has either the same number of fractional bits
+  // as, or one more fractional bit than, its corresponding signed fract type.
+  assert(getShortFractScale() == getUnsignedShortFractScale() ||
+         getShortFractScale() == getUnsignedShortFractScale() - 1);
+  assert(getFractScale() == getUnsignedFractScale() ||
+         getFractScale() == getUnsignedFractScale() - 1);
+  assert(getLongFractScale() == getUnsignedLongFractScale() ||
+         getLongFractScale() == getUnsignedLongFractScale() - 1);
+
+  // When arranged in order of increasing rank (see 6.3.1.3a), the number of
+  // fractional bits is nondecreasing for each of the following sets of
+  // fixed-point types:
+  // - signed fract types
+  // - unsigned fract types
+  // - signed accum types
+  // - unsigned accum types.
+  assert(getLongFractScale() >= getFractScale() &&
+         getFractScale() >= getShortFractScale());
+  assert(getUnsignedLongFractScale() >= getUnsignedFractScale() &&
+         getUnsignedFractScale() >= getUnsignedShortFractScale());
+  assert(LongAccumScale >= AccumScale && AccumScale >= ShortAccumScale);
+  assert(getUnsignedLongAccumScale() >= getUnsignedAccumScale() &&
+         getUnsignedAccumScale() >= getUnsignedShortAccumScale());
+
+  // When arranged in order of increasing rank (see 6.3.1.3a), the number of
+  // integral bits is nondecreasing for each of the following sets of
+  // fixed-point types:
+  // - signed accum types
+  // - unsigned accum types
+  assert(getLongAccumIBits() >= getAccumIBits() &&
+         getAccumIBits() >= getShortAccumIBits());
+  assert(getUnsignedLongAccumIBits() >= getUnsignedAccumIBits() &&
+         getUnsignedAccumIBits() >= getUnsignedShortAccumIBits());
+
+  // Each signed accum type has at least as many integral bits as its
+  // corresponding unsigned accum type.
+  assert(getShortAccumIBits() >= getUnsignedShortAccumIBits());
+  assert(getAccumIBits() >= getUnsignedAccumIBits());
+  assert(getLongAccumIBits() >= getUnsignedLongAccumIBits());
+}
+
+void TargetInfo::copyAuxTarget(const TargetInfo *Aux) {
+  auto *Target = static_cast<TransferrableTargetInfo*>(this);
+  auto *Src = static_cast<const TransferrableTargetInfo*>(Aux);
+  *Target = *Src;
+}