Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 736 deletions

diff --git a/gnu/llvm/lib/CodeGen/MIRParser/MILexer.cpp b/gnu/llvm/lib/CodeGen/MIRParser/MILexer.cpp
deleted file mode 100644
index 265877c2f5b..00000000000
--- a/gnu/llvm/lib/CodeGen/MIRParser/MILexer.cpp
+++ /dev/null
@@ -1,736 +0,0 @@
-//===- MILexer.cpp - Machine instructions lexer implementation ------------===//
-//
-//                     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 lexing of machine instructions.
-//
-//===----------------------------------------------------------------------===//
-
-#include "MILexer.h"
-#include "llvm/ADT/APSInt.h"
-#include "llvm/ADT/None.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/StringSwitch.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/Twine.h"
-#include <algorithm>
-#include <cassert>
-#include <cctype>
-#include <string>
-
-using namespace llvm;
-
-namespace {
-
-using ErrorCallbackType =
-    function_ref<void(StringRef::iterator Loc, const Twine &)>;
-
-/// This class provides a way to iterate and get characters from the source
-/// string.
-class Cursor {
-  const char *Ptr = nullptr;
-  const char *End = nullptr;
-
-public:
-  Cursor(NoneType) {}
-
-  explicit Cursor(StringRef Str) {
-    Ptr = Str.data();
-    End = Ptr + Str.size();
-  }
-
-  bool isEOF() const { return Ptr == End; }
-
-  char peek(int I = 0) const { return End - Ptr <= I ? 0 : Ptr[I]; }
-
-  void advance(unsigned I = 1) { Ptr += I; }
-
-  StringRef remaining() const { return StringRef(Ptr, End - Ptr); }
-
-  StringRef upto(Cursor C) const {
-    assert(C.Ptr >= Ptr && C.Ptr <= End);
-    return StringRef(Ptr, C.Ptr - Ptr);
-  }
-
-  StringRef::iterator location() const { return Ptr; }
-
-  operator bool() const { return Ptr != nullptr; }
-};
-
-} // end anonymous namespace
-
-MIToken &MIToken::reset(TokenKind Kind, StringRef Range) {
-  this->Kind = Kind;
-  this->Range = Range;
-  return *this;
-}
-
-MIToken &MIToken::setStringValue(StringRef StrVal) {
-  StringValue = StrVal;
-  return *this;
-}
-
-MIToken &MIToken::setOwnedStringValue(std::string StrVal) {
-  StringValueStorage = std::move(StrVal);
-  StringValue = StringValueStorage;
-  return *this;
-}
-
-MIToken &MIToken::setIntegerValue(APSInt IntVal) {
-  this->IntVal = std::move(IntVal);
-  return *this;
-}
-
-/// Skip the leading whitespace characters and return the updated cursor.
-static Cursor skipWhitespace(Cursor C) {
-  while (isblank(C.peek()))
-    C.advance();
-  return C;
-}
-
-static bool isNewlineChar(char C) { return C == '\n' || C == '\r'; }
-
-/// Skip a line comment and return the updated cursor.
-static Cursor skipComment(Cursor C) {
-  if (C.peek() != ';')
-    return C;
-  while (!isNewlineChar(C.peek()) && !C.isEOF())
-    C.advance();
-  return C;
-}
-
-/// Return true if the given character satisfies the following regular
-/// expression: [-a-zA-Z$._0-9]
-static bool isIdentifierChar(char C) {
-  return isalpha(C) || isdigit(C) || C == '_' || C == '-' || C == '.' ||
-         C == '$';
-}
-
-/// Unescapes the given string value.
-///
-/// Expects the string value to be quoted.
-static std::string unescapeQuotedString(StringRef Value) {
-  assert(Value.front() == '"' && Value.back() == '"');
-  Cursor C = Cursor(Value.substr(1, Value.size() - 2));
-
-  std::string Str;
-  Str.reserve(C.remaining().size());
-  while (!C.isEOF()) {
-    char Char = C.peek();
-    if (Char == '\\') {
-      if (C.peek(1) == '\\') {
-        // Two '\' become one
-        Str += '\\';
-        C.advance(2);
-        continue;
-      }
-      if (isxdigit(C.peek(1)) && isxdigit(C.peek(2))) {
-        Str += hexDigitValue(C.peek(1)) * 16 + hexDigitValue(C.peek(2));
-        C.advance(3);
-        continue;
-      }
-    }
-    Str += Char;
-    C.advance();
-  }
-  return Str;
-}
-
-/// Lex a string constant using the following regular expression: \"[^\"]*\"
-static Cursor lexStringConstant(Cursor C, ErrorCallbackType ErrorCallback) {
-  assert(C.peek() == '"');
-  for (C.advance(); C.peek() != '"'; C.advance()) {
-    if (C.isEOF() || isNewlineChar(C.peek())) {
-      ErrorCallback(
-          C.location(),
-          "end of machine instruction reached before the closing '\"'");
-      return None;
-    }
-  }
-  C.advance();
-  return C;
-}
-
-static Cursor lexName(Cursor C, MIToken &Token, MIToken::TokenKind Type,
-                      unsigned PrefixLength, ErrorCallbackType ErrorCallback) {
-  auto Range = C;
-  C.advance(PrefixLength);
-  if (C.peek() == '"') {
-    if (Cursor R = lexStringConstant(C, ErrorCallback)) {
-      StringRef String = Range.upto(R);
-      Token.reset(Type, String)
-          .setOwnedStringValue(
-              unescapeQuotedString(String.drop_front(PrefixLength)));
-      return R;
-    }
-    Token.reset(MIToken::Error, Range.remaining());
-    return Range;
-  }
-  while (isIdentifierChar(C.peek()))
-    C.advance();
-  Token.reset(Type, Range.upto(C))
-      .setStringValue(Range.upto(C).drop_front(PrefixLength));
-  return C;
-}
-
-static MIToken::TokenKind getIdentifierKind(StringRef Identifier) {
-  return StringSwitch<MIToken::TokenKind>(Identifier)
-      .Case("_", MIToken::underscore)
-      .Case("implicit", MIToken::kw_implicit)
-      .Case("implicit-def", MIToken::kw_implicit_define)
-      .Case("def", MIToken::kw_def)
-      .Case("dead", MIToken::kw_dead)
-      .Case("killed", MIToken::kw_killed)
-      .Case("undef", MIToken::kw_undef)
-      .Case("internal", MIToken::kw_internal)
-      .Case("early-clobber", MIToken::kw_early_clobber)
-      .Case("debug-use", MIToken::kw_debug_use)
-      .Case("renamable", MIToken::kw_renamable)
-      .Case("tied-def", MIToken::kw_tied_def)
-      .Case("frame-setup", MIToken::kw_frame_setup)
-      .Case("frame-destroy", MIToken::kw_frame_destroy)
-      .Case("nnan", MIToken::kw_nnan)
-      .Case("ninf", MIToken::kw_ninf)
-      .Case("nsz", MIToken::kw_nsz)
-      .Case("arcp", MIToken::kw_arcp)
-      .Case("contract", MIToken::kw_contract)
-      .Case("afn", MIToken::kw_afn)
-      .Case("reassoc", MIToken::kw_reassoc)
-      .Case("nuw" , MIToken::kw_nuw)
-      .Case("nsw" , MIToken::kw_nsw)
-      .Case("exact" , MIToken::kw_exact)
-      .Case("debug-location", MIToken::kw_debug_location)
-      .Case("same_value", MIToken::kw_cfi_same_value)
-      .Case("offset", MIToken::kw_cfi_offset)
-      .Case("rel_offset", MIToken::kw_cfi_rel_offset)
-      .Case("def_cfa_register", MIToken::kw_cfi_def_cfa_register)
-      .Case("def_cfa_offset", MIToken::kw_cfi_def_cfa_offset)
-      .Case("adjust_cfa_offset", MIToken::kw_cfi_adjust_cfa_offset)
-      .Case("escape", MIToken::kw_cfi_escape)
-      .Case("def_cfa", MIToken::kw_cfi_def_cfa)
-      .Case("remember_state", MIToken::kw_cfi_remember_state)
-      .Case("restore", MIToken::kw_cfi_restore)
-      .Case("restore_state", MIToken::kw_cfi_restore_state)
-      .Case("undefined", MIToken::kw_cfi_undefined)
-      .Case("register", MIToken::kw_cfi_register)
-      .Case("window_save", MIToken::kw_cfi_window_save)
-      .Case("negate_ra_sign_state", MIToken::kw_cfi_aarch64_negate_ra_sign_state)
-      .Case("blockaddress", MIToken::kw_blockaddress)
-      .Case("intrinsic", MIToken::kw_intrinsic)
-      .Case("target-index", MIToken::kw_target_index)
-      .Case("half", MIToken::kw_half)
-      .Case("float", MIToken::kw_float)
-      .Case("double", MIToken::kw_double)
-      .Case("x86_fp80", MIToken::kw_x86_fp80)
-      .Case("fp128", MIToken::kw_fp128)
-      .Case("ppc_fp128", MIToken::kw_ppc_fp128)
-      .Case("target-flags", MIToken::kw_target_flags)
-      .Case("volatile", MIToken::kw_volatile)
-      .Case("non-temporal", MIToken::kw_non_temporal)
-      .Case("dereferenceable", MIToken::kw_dereferenceable)
-      .Case("invariant", MIToken::kw_invariant)
-      .Case("align", MIToken::kw_align)
-      .Case("addrspace", MIToken::kw_addrspace)
-      .Case("stack", MIToken::kw_stack)
-      .Case("got", MIToken::kw_got)
-      .Case("jump-table", MIToken::kw_jump_table)
-      .Case("constant-pool", MIToken::kw_constant_pool)
-      .Case("call-entry", MIToken::kw_call_entry)
-      .Case("liveout", MIToken::kw_liveout)
-      .Case("address-taken", MIToken::kw_address_taken)
-      .Case("landing-pad", MIToken::kw_landing_pad)
-      .Case("liveins", MIToken::kw_liveins)
-      .Case("successors", MIToken::kw_successors)
-      .Case("floatpred", MIToken::kw_floatpred)
-      .Case("intpred", MIToken::kw_intpred)
-      .Case("pre-instr-symbol", MIToken::kw_pre_instr_symbol)
-      .Case("post-instr-symbol", MIToken::kw_post_instr_symbol)
-      .Case("unknown-size", MIToken::kw_unknown_size)
-      .Default(MIToken::Identifier);
-}
-
-static Cursor maybeLexIdentifier(Cursor C, MIToken &Token) {
-  if (!isalpha(C.peek()) && C.peek() != '_')
-    return None;
-  auto Range = C;
-  while (isIdentifierChar(C.peek()))
-    C.advance();
-  auto Identifier = Range.upto(C);
-  Token.reset(getIdentifierKind(Identifier), Identifier)
-      .setStringValue(Identifier);
-  return C;
-}
-
-static Cursor maybeLexMachineBasicBlock(Cursor C, MIToken &Token,
-                                        ErrorCallbackType ErrorCallback) {
-  bool IsReference = C.remaining().startswith("%bb.");
-  if (!IsReference && !C.remaining().startswith("bb."))
-    return None;
-  auto Range = C;
-  unsigned PrefixLength = IsReference ? 4 : 3;
-  C.advance(PrefixLength); // Skip '%bb.' or 'bb.'
-  if (!isdigit(C.peek())) {
-    Token.reset(MIToken::Error, C.remaining());
-    ErrorCallback(C.location(), "expected a number after '%bb.'");
-    return C;
-  }
-  auto NumberRange = C;
-  while (isdigit(C.peek()))
-    C.advance();
-  StringRef Number = NumberRange.upto(C);
-  unsigned StringOffset = PrefixLength + Number.size(); // Drop '%bb.<id>'
-  // TODO: The format bb.<id>.<irname> is supported only when it's not a
-  // reference. Once we deprecate the format where the irname shows up, we
-  // should only lex forward if it is a reference.
-  if (C.peek() == '.') {
-    C.advance(); // Skip '.'
-    ++StringOffset;
-    while (isIdentifierChar(C.peek()))
-      C.advance();
-  }
-  Token.reset(IsReference ? MIToken::MachineBasicBlock
-                          : MIToken::MachineBasicBlockLabel,
-              Range.upto(C))
-      .setIntegerValue(APSInt(Number))
-      .setStringValue(Range.upto(C).drop_front(StringOffset));
-  return C;
-}
-
-static Cursor maybeLexIndex(Cursor C, MIToken &Token, StringRef Rule,
-                            MIToken::TokenKind Kind) {
-  if (!C.remaining().startswith(Rule) || !isdigit(C.peek(Rule.size())))
-    return None;
-  auto Range = C;
-  C.advance(Rule.size());
-  auto NumberRange = C;
-  while (isdigit(C.peek()))
-    C.advance();
-  Token.reset(Kind, Range.upto(C)).setIntegerValue(APSInt(NumberRange.upto(C)));
-  return C;
-}
-
-static Cursor maybeLexIndexAndName(Cursor C, MIToken &Token, StringRef Rule,
-                                   MIToken::TokenKind Kind) {
-  if (!C.remaining().startswith(Rule) || !isdigit(C.peek(Rule.size())))
-    return None;
-  auto Range = C;
-  C.advance(Rule.size());
-  auto NumberRange = C;
-  while (isdigit(C.peek()))
-    C.advance();
-  StringRef Number = NumberRange.upto(C);
-  unsigned StringOffset = Rule.size() + Number.size();
-  if (C.peek() == '.') {
-    C.advance();
-    ++StringOffset;
-    while (isIdentifierChar(C.peek()))
-      C.advance();
-  }
-  Token.reset(Kind, Range.upto(C))
-      .setIntegerValue(APSInt(Number))
-      .setStringValue(Range.upto(C).drop_front(StringOffset));
-  return C;
-}
-
-static Cursor maybeLexJumpTableIndex(Cursor C, MIToken &Token) {
-  return maybeLexIndex(C, Token, "%jump-table.", MIToken::JumpTableIndex);
-}
-
-static Cursor maybeLexStackObject(Cursor C, MIToken &Token) {
-  return maybeLexIndexAndName(C, Token, "%stack.", MIToken::StackObject);
-}
-
-static Cursor maybeLexFixedStackObject(Cursor C, MIToken &Token) {
-  return maybeLexIndex(C, Token, "%fixed-stack.", MIToken::FixedStackObject);
-}
-
-static Cursor maybeLexConstantPoolItem(Cursor C, MIToken &Token) {
-  return maybeLexIndex(C, Token, "%const.", MIToken::ConstantPoolItem);
-}
-
-static Cursor maybeLexSubRegisterIndex(Cursor C, MIToken &Token,
-                                       ErrorCallbackType ErrorCallback) {
-  const StringRef Rule = "%subreg.";
-  if (!C.remaining().startswith(Rule))
-    return None;
-  return lexName(C, Token, MIToken::SubRegisterIndex, Rule.size(),
-                 ErrorCallback);
-}
-
-static Cursor maybeLexIRBlock(Cursor C, MIToken &Token,
-                              ErrorCallbackType ErrorCallback) {
-  const StringRef Rule = "%ir-block.";
-  if (!C.remaining().startswith(Rule))
-    return None;
-  if (isdigit(C.peek(Rule.size())))
-    return maybeLexIndex(C, Token, Rule, MIToken::IRBlock);
-  return lexName(C, Token, MIToken::NamedIRBlock, Rule.size(), ErrorCallback);
-}
-
-static Cursor maybeLexIRValue(Cursor C, MIToken &Token,
-                              ErrorCallbackType ErrorCallback) {
-  const StringRef Rule = "%ir.";
-  if (!C.remaining().startswith(Rule))
-    return None;
-  if (isdigit(C.peek(Rule.size())))
-    return maybeLexIndex(C, Token, Rule, MIToken::IRValue);
-  return lexName(C, Token, MIToken::NamedIRValue, Rule.size(), ErrorCallback);
-}
-
-static Cursor maybeLexStringConstant(Cursor C, MIToken &Token,
-                                     ErrorCallbackType ErrorCallback) {
-  if (C.peek() != '"')
-    return None;
-  return lexName(C, Token, MIToken::StringConstant, /*PrefixLength=*/0,
-                 ErrorCallback);
-}
-
-static Cursor lexVirtualRegister(Cursor C, MIToken &Token) {
-  auto Range = C;
-  C.advance(); // Skip '%'
-  auto NumberRange = C;
-  while (isdigit(C.peek()))
-    C.advance();
-  Token.reset(MIToken::VirtualRegister, Range.upto(C))
-      .setIntegerValue(APSInt(NumberRange.upto(C)));
-  return C;
-}
-
-/// Returns true for a character allowed in a register name.
-static bool isRegisterChar(char C) {
-  return isIdentifierChar(C) && C != '.';
-}
-
-static Cursor lexNamedVirtualRegister(Cursor C, MIToken &Token) {
-  Cursor Range = C;
-  C.advance(); // Skip '%'
-  while (isRegisterChar(C.peek()))
-    C.advance();
-  Token.reset(MIToken::NamedVirtualRegister, Range.upto(C))
-      .setStringValue(Range.upto(C).drop_front(1)); // Drop the '%'
-  return C;
-}
-
-static Cursor maybeLexRegister(Cursor C, MIToken &Token,
-                               ErrorCallbackType ErrorCallback) {
-  if (C.peek() != '%' && C.peek() != '$')
-    return None;
-
-  if (C.peek() == '%') {
-    if (isdigit(C.peek(1)))
-      return lexVirtualRegister(C, Token);
-
-    if (isRegisterChar(C.peek(1)))
-      return lexNamedVirtualRegister(C, Token);
-
-    return None;
-  }
-
-  assert(C.peek() == '$');
-  auto Range = C;
-  C.advance(); // Skip '$'
-  while (isRegisterChar(C.peek()))
-    C.advance();
-  Token.reset(MIToken::NamedRegister, Range.upto(C))
-      .setStringValue(Range.upto(C).drop_front(1)); // Drop the '$'
-  return C;
-}
-
-static Cursor maybeLexGlobalValue(Cursor C, MIToken &Token,
-                                  ErrorCallbackType ErrorCallback) {
-  if (C.peek() != '@')
-    return None;
-  if (!isdigit(C.peek(1)))
-    return lexName(C, Token, MIToken::NamedGlobalValue, /*PrefixLength=*/1,
-                   ErrorCallback);
-  auto Range = C;
-  C.advance(1); // Skip the '@'
-  auto NumberRange = C;
-  while (isdigit(C.peek()))
-    C.advance();
-  Token.reset(MIToken::GlobalValue, Range.upto(C))
-      .setIntegerValue(APSInt(NumberRange.upto(C)));
-  return C;
-}
-
-static Cursor maybeLexExternalSymbol(Cursor C, MIToken &Token,
-                                     ErrorCallbackType ErrorCallback) {
-  if (C.peek() != '&')
-    return None;
-  return lexName(C, Token, MIToken::ExternalSymbol, /*PrefixLength=*/1,
-                 ErrorCallback);
-}
-
-static Cursor maybeLexMCSymbol(Cursor C, MIToken &Token,
-                               ErrorCallbackType ErrorCallback) {
-  const StringRef Rule = "<mcsymbol ";
-  if (!C.remaining().startswith(Rule))
-    return None;
-  auto Start = C;
-  C.advance(Rule.size());
-
-  // Try a simple unquoted name.
-  if (C.peek() != '"') {
-    while (isIdentifierChar(C.peek()))
-      C.advance();
-    StringRef String = Start.upto(C).drop_front(Rule.size());
-    if (C.peek() != '>') {
-      ErrorCallback(C.location(),
-                    "expected the '<mcsymbol ...' to be closed by a '>'");
-      Token.reset(MIToken::Error, Start.remaining());
-      return Start;
-    }
-    C.advance();
-
-    Token.reset(MIToken::MCSymbol, Start.upto(C)).setStringValue(String);
-    return C;
-  }
-
-  // Otherwise lex out a quoted name.
-  Cursor R = lexStringConstant(C, ErrorCallback);
-  if (!R) {
-    ErrorCallback(C.location(),
-                  "unable to parse quoted string from opening quote");
-    Token.reset(MIToken::Error, Start.remaining());
-    return Start;
-  }
-  StringRef String = Start.upto(R).drop_front(Rule.size());
-  if (R.peek() != '>') {
-    ErrorCallback(R.location(),
-                  "expected the '<mcsymbol ...' to be closed by a '>'");
-    Token.reset(MIToken::Error, Start.remaining());
-    return Start;
-  }
-  R.advance();
-
-  Token.reset(MIToken::MCSymbol, Start.upto(R))
-      .setOwnedStringValue(unescapeQuotedString(String));
-  return R;
-}
-
-static bool isValidHexFloatingPointPrefix(char C) {
-  return C == 'H' || C == 'K' || C == 'L' || C == 'M';
-}
-
-static Cursor lexFloatingPointLiteral(Cursor Range, Cursor C, MIToken &Token) {
-  C.advance();
-  // Skip over [0-9]*([eE][-+]?[0-9]+)?
-  while (isdigit(C.peek()))
-    C.advance();
-  if ((C.peek() == 'e' || C.peek() == 'E') &&
-      (isdigit(C.peek(1)) ||
-       ((C.peek(1) == '-' || C.peek(1) == '+') && isdigit(C.peek(2))))) {
-    C.advance(2);
-    while (isdigit(C.peek()))
-      C.advance();
-  }
-  Token.reset(MIToken::FloatingPointLiteral, Range.upto(C));
-  return C;
-}
-
-static Cursor maybeLexHexadecimalLiteral(Cursor C, MIToken &Token) {
-  if (C.peek() != '0' || (C.peek(1) != 'x' && C.peek(1) != 'X'))
-    return None;
-  Cursor Range = C;
-  C.advance(2);
-  unsigned PrefLen = 2;
-  if (isValidHexFloatingPointPrefix(C.peek())) {
-    C.advance();
-    PrefLen++;
-  }
-  while (isxdigit(C.peek()))
-    C.advance();
-  StringRef StrVal = Range.upto(C);
-  if (StrVal.size() <= PrefLen)
-    return None;
-  if (PrefLen == 2)
-    Token.reset(MIToken::HexLiteral, Range.upto(C));
-  else // It must be 3, which means that there was a floating-point prefix.
-    Token.reset(MIToken::FloatingPointLiteral, Range.upto(C));
-  return C;
-}
-
-static Cursor maybeLexNumericalLiteral(Cursor C, MIToken &Token) {
-  if (!isdigit(C.peek()) && (C.peek() != '-' || !isdigit(C.peek(1))))
-    return None;
-  auto Range = C;
-  C.advance();
-  while (isdigit(C.peek()))
-    C.advance();
-  if (C.peek() == '.')
-    return lexFloatingPointLiteral(Range, C, Token);
-  StringRef StrVal = Range.upto(C);
-  Token.reset(MIToken::IntegerLiteral, StrVal).setIntegerValue(APSInt(StrVal));
-  return C;
-}
-
-static MIToken::TokenKind getMetadataKeywordKind(StringRef Identifier) {
-  return StringSwitch<MIToken::TokenKind>(Identifier)
-      .Case("!tbaa", MIToken::md_tbaa)
-      .Case("!alias.scope", MIToken::md_alias_scope)
-      .Case("!noalias", MIToken::md_noalias)
-      .Case("!range", MIToken::md_range)
-      .Case("!DIExpression", MIToken::md_diexpr)
-      .Case("!DILocation", MIToken::md_dilocation)
-      .Default(MIToken::Error);
-}
-
-static Cursor maybeLexExlaim(Cursor C, MIToken &Token,
-                             ErrorCallbackType ErrorCallback) {
-  if (C.peek() != '!')
-    return None;
-  auto Range = C;
-  C.advance(1);
-  if (isdigit(C.peek()) || !isIdentifierChar(C.peek())) {
-    Token.reset(MIToken::exclaim, Range.upto(C));
-    return C;
-  }
-  while (isIdentifierChar(C.peek()))
-    C.advance();
-  StringRef StrVal = Range.upto(C);
-  Token.reset(getMetadataKeywordKind(StrVal), StrVal);
-  if (Token.isError())
-    ErrorCallback(Token.location(),
-                  "use of unknown metadata keyword '" + StrVal + "'");
-  return C;
-}
-
-static MIToken::TokenKind symbolToken(char C) {
-  switch (C) {
-  case ',':
-    return MIToken::comma;
-  case '.':
-    return MIToken::dot;
-  case '=':
-    return MIToken::equal;
-  case ':':
-    return MIToken::colon;
-  case '(':
-    return MIToken::lparen;
-  case ')':
-    return MIToken::rparen;
-  case '{':
-    return MIToken::lbrace;
-  case '}':
-    return MIToken::rbrace;
-  case '+':
-    return MIToken::plus;
-  case '-':
-    return MIToken::minus;
-  case '<':
-    return MIToken::less;
-  case '>':
-    return MIToken::greater;
-  default:
-    return MIToken::Error;
-  }
-}
-
-static Cursor maybeLexSymbol(Cursor C, MIToken &Token) {
-  MIToken::TokenKind Kind;
-  unsigned Length = 1;
-  if (C.peek() == ':' && C.peek(1) == ':') {
-    Kind = MIToken::coloncolon;
-    Length = 2;
-  } else
-    Kind = symbolToken(C.peek());
-  if (Kind == MIToken::Error)
-    return None;
-  auto Range = C;
-  C.advance(Length);
-  Token.reset(Kind, Range.upto(C));
-  return C;
-}
-
-static Cursor maybeLexNewline(Cursor C, MIToken &Token) {
-  if (!isNewlineChar(C.peek()))
-    return None;
-  auto Range = C;
-  C.advance();
-  Token.reset(MIToken::Newline, Range.upto(C));
-  return C;
-}
-
-static Cursor maybeLexEscapedIRValue(Cursor C, MIToken &Token,
-                                     ErrorCallbackType ErrorCallback) {
-  if (C.peek() != '`')
-    return None;
-  auto Range = C;
-  C.advance();
-  auto StrRange = C;
-  while (C.peek() != '`') {
-    if (C.isEOF() || isNewlineChar(C.peek())) {
-      ErrorCallback(
-          C.location(),
-          "end of machine instruction reached before the closing '`'");
-      Token.reset(MIToken::Error, Range.remaining());
-      return C;
-    }
-    C.advance();
-  }
-  StringRef Value = StrRange.upto(C);
-  C.advance();
-  Token.reset(MIToken::QuotedIRValue, Range.upto(C)).setStringValue(Value);
-  return C;
-}
-
-StringRef llvm::lexMIToken(StringRef Source, MIToken &Token,
-                           ErrorCallbackType ErrorCallback) {
-  auto C = skipComment(skipWhitespace(Cursor(Source)));
-  if (C.isEOF()) {
-    Token.reset(MIToken::Eof, C.remaining());
-    return C.remaining();
-  }
-
-  if (Cursor R = maybeLexMachineBasicBlock(C, Token, ErrorCallback))
-    return R.remaining();
-  if (Cursor R = maybeLexIdentifier(C, Token))
-    return R.remaining();
-  if (Cursor R = maybeLexJumpTableIndex(C, Token))
-    return R.remaining();
-  if (Cursor R = maybeLexStackObject(C, Token))
-    return R.remaining();
-  if (Cursor R = maybeLexFixedStackObject(C, Token))
-    return R.remaining();
-  if (Cursor R = maybeLexConstantPoolItem(C, Token))
-    return R.remaining();
-  if (Cursor R = maybeLexSubRegisterIndex(C, Token, ErrorCallback))
-    return R.remaining();
-  if (Cursor R = maybeLexIRBlock(C, Token, ErrorCallback))
-    return R.remaining();
-  if (Cursor R = maybeLexIRValue(C, Token, ErrorCallback))
-    return R.remaining();
-  if (Cursor R = maybeLexRegister(C, Token, ErrorCallback))
-    return R.remaining();
-  if (Cursor R = maybeLexGlobalValue(C, Token, ErrorCallback))
-    return R.remaining();
-  if (Cursor R = maybeLexExternalSymbol(C, Token, ErrorCallback))
-    return R.remaining();
-  if (Cursor R = maybeLexMCSymbol(C, Token, ErrorCallback))
-    return R.remaining();
-  if (Cursor R = maybeLexHexadecimalLiteral(C, Token))
-    return R.remaining();
-  if (Cursor R = maybeLexNumericalLiteral(C, Token))
-    return R.remaining();
-  if (Cursor R = maybeLexExlaim(C, Token, ErrorCallback))
-    return R.remaining();
-  if (Cursor R = maybeLexSymbol(C, Token))
-    return R.remaining();
-  if (Cursor R = maybeLexNewline(C, Token))
-    return R.remaining();
-  if (Cursor R = maybeLexEscapedIRValue(C, Token, ErrorCallback))
-    return R.remaining();
-  if (Cursor R = maybeLexStringConstant(C, Token, ErrorCallback))
-    return R.remaining();
-
-  Token.reset(MIToken::Error, C.remaining());
-  ErrorCallback(C.location(),
-                Twine("unexpected character '") + Twine(C.peek()) + "'");
-  return C.remaining();
-}