Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 1884 deletions

diff --git a/gnu/llvm/lib/MC/MCDwarf.cpp b/gnu/llvm/lib/MC/MCDwarf.cpp
deleted file mode 100644
index 38b02694d81..00000000000
--- a/gnu/llvm/lib/MC/MCDwarf.cpp
+++ /dev/null
@@ -1,1884 +0,0 @@
-//===- lib/MC/MCDwarf.cpp - MCDwarf implementation ------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/MC/MCDwarf.h"
-#include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/Hashing.h"
-#include "llvm/ADT/Optional.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/Twine.h"
-#include "llvm/BinaryFormat/Dwarf.h"
-#include "llvm/Config/config.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCObjectFileInfo.h"
-#include "llvm/MC/MCObjectStreamer.h"
-#include "llvm/MC/MCRegisterInfo.h"
-#include "llvm/MC/MCSection.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/StringTableBuilder.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/Endian.h"
-#include "llvm/Support/EndianStream.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/LEB128.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/SourceMgr.h"
-#include "llvm/Support/raw_ostream.h"
-#include <cassert>
-#include <cstdint>
-#include <string>
-#include <utility>
-#include <vector>
-
-using namespace llvm;
-
-/// Manage the .debug_line_str section contents, if we use it.
-class llvm::MCDwarfLineStr {
-  MCSymbol *LineStrLabel = nullptr;
-  StringTableBuilder LineStrings{StringTableBuilder::DWARF};
-  bool UseRelocs = false;
-
-public:
-  /// Construct an instance that can emit .debug_line_str (for use in a normal
-  /// v5 line table).
-  explicit MCDwarfLineStr(MCContext &Ctx) {
-    UseRelocs = Ctx.getAsmInfo()->doesDwarfUseRelocationsAcrossSections();
-    if (UseRelocs)
-      LineStrLabel =
-          Ctx.getObjectFileInfo()->getDwarfLineStrSection()->getBeginSymbol();
-  }
-
-  /// Emit a reference to the string.
-  void emitRef(MCStreamer *MCOS, StringRef Path);
-
-  /// Emit the .debug_line_str section if appropriate.
-  void emitSection(MCStreamer *MCOS);
-};
-
-static inline uint64_t ScaleAddrDelta(MCContext &Context, uint64_t AddrDelta) {
-  unsigned MinInsnLength = Context.getAsmInfo()->getMinInstAlignment();
-  if (MinInsnLength == 1)
-    return AddrDelta;
-  if (AddrDelta % MinInsnLength != 0) {
-    // TODO: report this error, but really only once.
-    ;
-  }
-  return AddrDelta / MinInsnLength;
-}
-
-//
-// This is called when an instruction is assembled into the specified section
-// and if there is information from the last .loc directive that has yet to have
-// a line entry made for it is made.
-//
-void MCDwarfLineEntry::Make(MCObjectStreamer *MCOS, MCSection *Section) {
-  if (!MCOS->getContext().getDwarfLocSeen())
-    return;
-
-  // Create a symbol at in the current section for use in the line entry.
-  MCSymbol *LineSym = MCOS->getContext().createTempSymbol();
-  // Set the value of the symbol to use for the MCDwarfLineEntry.
-  MCOS->EmitLabel(LineSym);
-
-  // Get the current .loc info saved in the context.
-  const MCDwarfLoc &DwarfLoc = MCOS->getContext().getCurrentDwarfLoc();
-
-  // Create a (local) line entry with the symbol and the current .loc info.
-  MCDwarfLineEntry LineEntry(LineSym, DwarfLoc);
-
-  // clear DwarfLocSeen saying the current .loc info is now used.
-  MCOS->getContext().clearDwarfLocSeen();
-
-  // Add the line entry to this section's entries.
-  MCOS->getContext()
-      .getMCDwarfLineTable(MCOS->getContext().getDwarfCompileUnitID())
-      .getMCLineSections()
-      .addLineEntry(LineEntry, Section);
-}
-
-//
-// This helper routine returns an expression of End - Start + IntVal .
-//
-static inline const MCExpr *MakeStartMinusEndExpr(const MCStreamer &MCOS,
-                                                  const MCSymbol &Start,
-                                                  const MCSymbol &End,
-                                                  int IntVal) {
-  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
-  const MCExpr *Res =
-    MCSymbolRefExpr::create(&End, Variant, MCOS.getContext());
-  const MCExpr *RHS =
-    MCSymbolRefExpr::create(&Start, Variant, MCOS.getContext());
-  const MCExpr *Res1 =
-    MCBinaryExpr::create(MCBinaryExpr::Sub, Res, RHS, MCOS.getContext());
-  const MCExpr *Res2 =
-    MCConstantExpr::create(IntVal, MCOS.getContext());
-  const MCExpr *Res3 =
-    MCBinaryExpr::create(MCBinaryExpr::Sub, Res1, Res2, MCOS.getContext());
-  return Res3;
-}
-
-//
-// This helper routine returns an expression of Start + IntVal .
-//
-static inline const MCExpr *
-makeStartPlusIntExpr(MCContext &Ctx, const MCSymbol &Start, int IntVal) {
-  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
-  const MCExpr *LHS = MCSymbolRefExpr::create(&Start, Variant, Ctx);
-  const MCExpr *RHS = MCConstantExpr::create(IntVal, Ctx);
-  const MCExpr *Res = MCBinaryExpr::create(MCBinaryExpr::Add, LHS, RHS, Ctx);
-  return Res;
-}
-
-//
-// This emits the Dwarf line table for the specified section from the entries
-// in the LineSection.
-//
-static inline void
-EmitDwarfLineTable(MCObjectStreamer *MCOS, MCSection *Section,
-                   const MCLineSection::MCDwarfLineEntryCollection &LineEntries) {
-  unsigned FileNum = 1;
-  unsigned LastLine = 1;
-  unsigned Column = 0;
-  unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0;
-  unsigned Isa = 0;
-  unsigned Discriminator = 0;
-  MCSymbol *LastLabel = nullptr;
-
-  // Loop through each MCDwarfLineEntry and encode the dwarf line number table.
-  for (const MCDwarfLineEntry &LineEntry : LineEntries) {
-    int64_t LineDelta = static_cast<int64_t>(LineEntry.getLine()) - LastLine;
-
-    if (FileNum != LineEntry.getFileNum()) {
-      FileNum = LineEntry.getFileNum();
-      MCOS->EmitIntValue(dwarf::DW_LNS_set_file, 1);
-      MCOS->EmitULEB128IntValue(FileNum);
-    }
-    if (Column != LineEntry.getColumn()) {
-      Column = LineEntry.getColumn();
-      MCOS->EmitIntValue(dwarf::DW_LNS_set_column, 1);
-      MCOS->EmitULEB128IntValue(Column);
-    }
-    if (Discriminator != LineEntry.getDiscriminator() &&
-        MCOS->getContext().getDwarfVersion() >= 4) {
-      Discriminator = LineEntry.getDiscriminator();
-      unsigned Size = getULEB128Size(Discriminator);
-      MCOS->EmitIntValue(dwarf::DW_LNS_extended_op, 1);
-      MCOS->EmitULEB128IntValue(Size + 1);
-      MCOS->EmitIntValue(dwarf::DW_LNE_set_discriminator, 1);
-      MCOS->EmitULEB128IntValue(Discriminator);
-    }
-    if (Isa != LineEntry.getIsa()) {
-      Isa = LineEntry.getIsa();
-      MCOS->EmitIntValue(dwarf::DW_LNS_set_isa, 1);
-      MCOS->EmitULEB128IntValue(Isa);
-    }
-    if ((LineEntry.getFlags() ^ Flags) & DWARF2_FLAG_IS_STMT) {
-      Flags = LineEntry.getFlags();
-      MCOS->EmitIntValue(dwarf::DW_LNS_negate_stmt, 1);
-    }
-    if (LineEntry.getFlags() & DWARF2_FLAG_BASIC_BLOCK)
-      MCOS->EmitIntValue(dwarf::DW_LNS_set_basic_block, 1);
-    if (LineEntry.getFlags() & DWARF2_FLAG_PROLOGUE_END)
-      MCOS->EmitIntValue(dwarf::DW_LNS_set_prologue_end, 1);
-    if (LineEntry.getFlags() & DWARF2_FLAG_EPILOGUE_BEGIN)
-      MCOS->EmitIntValue(dwarf::DW_LNS_set_epilogue_begin, 1);
-
-    MCSymbol *Label = LineEntry.getLabel();
-
-    // At this point we want to emit/create the sequence to encode the delta in
-    // line numbers and the increment of the address from the previous Label
-    // and the current Label.
-    const MCAsmInfo *asmInfo = MCOS->getContext().getAsmInfo();
-    MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label,
-                                   asmInfo->getCodePointerSize());
-
-    Discriminator = 0;
-    LastLine = LineEntry.getLine();
-    LastLabel = Label;
-  }
-
-  // Emit a DW_LNE_end_sequence for the end of the section.
-  // Use the section end label to compute the address delta and use INT64_MAX
-  // as the line delta which is the signal that this is actually a
-  // DW_LNE_end_sequence.
-  MCSymbol *SectionEnd = MCOS->endSection(Section);
-
-  // Switch back the dwarf line section, in case endSection had to switch the
-  // section.
-  MCContext &Ctx = MCOS->getContext();
-  MCOS->SwitchSection(Ctx.getObjectFileInfo()->getDwarfLineSection());
-
-  const MCAsmInfo *AsmInfo = Ctx.getAsmInfo();
-  MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd,
-                                 AsmInfo->getCodePointerSize());
-}
-
-//
-// This emits the Dwarf file and the line tables.
-//
-void MCDwarfLineTable::Emit(MCObjectStreamer *MCOS,
-                            MCDwarfLineTableParams Params) {
-  MCContext &context = MCOS->getContext();
-
-  auto &LineTables = context.getMCDwarfLineTables();
-
-  // Bail out early so we don't switch to the debug_line section needlessly and
-  // in doing so create an unnecessary (if empty) section.
-  if (LineTables.empty())
-    return;
-
-  // In a v5 non-split line table, put the strings in a separate section.
-  Optional<MCDwarfLineStr> LineStr;
-  if (context.getDwarfVersion() >= 5)
-    LineStr = MCDwarfLineStr(context);
-
-  // Switch to the section where the table will be emitted into.
-  MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection());
-
-  // Handle the rest of the Compile Units.
-  for (const auto &CUIDTablePair : LineTables) {
-    CUIDTablePair.second.EmitCU(MCOS, Params, LineStr);
-  }
-
-  if (LineStr)
-    LineStr->emitSection(MCOS);
-}
-
-void MCDwarfDwoLineTable::Emit(MCStreamer &MCOS, MCDwarfLineTableParams Params,
-                               MCSection *Section) const {
-  if (Header.MCDwarfFiles.empty())
-    return;
-  Optional<MCDwarfLineStr> NoLineStr(None);
-  MCOS.SwitchSection(Section);
-  MCOS.EmitLabel(Header.Emit(&MCOS, Params, None, NoLineStr).second);
-}
-
-std::pair<MCSymbol *, MCSymbol *>
-MCDwarfLineTableHeader::Emit(MCStreamer *MCOS, MCDwarfLineTableParams Params,
-                             Optional<MCDwarfLineStr> &LineStr) const {
-  static const char StandardOpcodeLengths[] = {
-      0, // length of DW_LNS_copy
-      1, // length of DW_LNS_advance_pc
-      1, // length of DW_LNS_advance_line
-      1, // length of DW_LNS_set_file
-      1, // length of DW_LNS_set_column
-      0, // length of DW_LNS_negate_stmt
-      0, // length of DW_LNS_set_basic_block
-      0, // length of DW_LNS_const_add_pc
-      1, // length of DW_LNS_fixed_advance_pc
-      0, // length of DW_LNS_set_prologue_end
-      0, // length of DW_LNS_set_epilogue_begin
-      1  // DW_LNS_set_isa
-  };
-  assert(array_lengthof(StandardOpcodeLengths) >=
-         (Params.DWARF2LineOpcodeBase - 1U));
-  return Emit(
-      MCOS, Params,
-      makeArrayRef(StandardOpcodeLengths, Params.DWARF2LineOpcodeBase - 1),
-      LineStr);
-}
-
-static const MCExpr *forceExpAbs(MCStreamer &OS, const MCExpr* Expr) {
-  MCContext &Context = OS.getContext();
-  assert(!isa<MCSymbolRefExpr>(Expr));
-  if (Context.getAsmInfo()->hasAggressiveSymbolFolding())
-    return Expr;
-
-  MCSymbol *ABS = Context.createTempSymbol();
-  OS.EmitAssignment(ABS, Expr);
-  return MCSymbolRefExpr::create(ABS, Context);
-}
-
-static void emitAbsValue(MCStreamer &OS, const MCExpr *Value, unsigned Size) {
-  const MCExpr *ABS = forceExpAbs(OS, Value);
-  OS.EmitValue(ABS, Size);
-}
-
-void MCDwarfLineStr::emitSection(MCStreamer *MCOS) {
-  // Switch to the .debug_line_str section.
-  MCOS->SwitchSection(
-      MCOS->getContext().getObjectFileInfo()->getDwarfLineStrSection());
-  // Emit the strings without perturbing the offsets we used.
-  LineStrings.finalizeInOrder();
-  SmallString<0> Data;
-  Data.resize(LineStrings.getSize());
-  LineStrings.write((uint8_t *)Data.data());
-  MCOS->EmitBinaryData(Data.str());
-}
-
-void MCDwarfLineStr::emitRef(MCStreamer *MCOS, StringRef Path) {
-  int RefSize = 4; // FIXME: Support DWARF-64
-  size_t Offset = LineStrings.add(Path);
-  if (UseRelocs) {
-    MCContext &Ctx = MCOS->getContext();
-    MCOS->EmitValue(makeStartPlusIntExpr(Ctx, *LineStrLabel, Offset), RefSize);
-  } else
-    MCOS->EmitIntValue(Offset, RefSize);
-}
-
-void MCDwarfLineTableHeader::emitV2FileDirTables(MCStreamer *MCOS) const {
-  // First the directory table.
-  for (auto &Dir : MCDwarfDirs) {
-    MCOS->EmitBytes(Dir);                // The DirectoryName, and...
-    MCOS->EmitBytes(StringRef("\0", 1)); // its null terminator.
-  }
-  MCOS->EmitIntValue(0, 1); // Terminate the directory list.
-
-  // Second the file table.
-  for (unsigned i = 1; i < MCDwarfFiles.size(); i++) {
-    assert(!MCDwarfFiles[i].Name.empty());
-    MCOS->EmitBytes(MCDwarfFiles[i].Name); // FileName and...
-    MCOS->EmitBytes(StringRef("\0", 1));   // its null terminator.
-    MCOS->EmitULEB128IntValue(MCDwarfFiles[i].DirIndex); // Directory number.
-    MCOS->EmitIntValue(0, 1); // Last modification timestamp (always 0).
-    MCOS->EmitIntValue(0, 1); // File size (always 0).
-  }
-  MCOS->EmitIntValue(0, 1); // Terminate the file list.
-}
-
-static void emitOneV5FileEntry(MCStreamer *MCOS, const MCDwarfFile &DwarfFile,
-                               bool EmitMD5, bool HasSource,
-                               Optional<MCDwarfLineStr> &LineStr) {
-  assert(!DwarfFile.Name.empty());
-  if (LineStr)
-    LineStr->emitRef(MCOS, DwarfFile.Name);
-  else {
-    MCOS->EmitBytes(DwarfFile.Name);     // FileName and...
-    MCOS->EmitBytes(StringRef("\0", 1)); // its null terminator.
-  }
-  MCOS->EmitULEB128IntValue(DwarfFile.DirIndex); // Directory number.
-  if (EmitMD5) {
-    MD5::MD5Result *Cksum = DwarfFile.Checksum;
-    MCOS->EmitBinaryData(
-        StringRef(reinterpret_cast<const char *>(Cksum->Bytes.data()),
-                  Cksum->Bytes.size()));
-  }
-  if (HasSource) {
-    if (LineStr)
-      LineStr->emitRef(MCOS, DwarfFile.Source.getValueOr(StringRef()));
-    else {
-      MCOS->EmitBytes(
-          DwarfFile.Source.getValueOr(StringRef())); // Source and...
-      MCOS->EmitBytes(StringRef("\0", 1));           // its null terminator.
-    }
-  }
-}
-
-void MCDwarfLineTableHeader::emitV5FileDirTables(
-    MCStreamer *MCOS, Optional<MCDwarfLineStr> &LineStr,
-    StringRef CtxCompilationDir) const {
-  // The directory format, which is just a list of the directory paths.  In a
-  // non-split object, these are references to .debug_line_str; in a split
-  // object, they are inline strings.
-  MCOS->EmitIntValue(1, 1);
-  MCOS->EmitULEB128IntValue(dwarf::DW_LNCT_path);
-  MCOS->EmitULEB128IntValue(LineStr ? dwarf::DW_FORM_line_strp
-                                    : dwarf::DW_FORM_string);
-  MCOS->EmitULEB128IntValue(MCDwarfDirs.size() + 1);
-  // Try not to emit an empty compilation directory.
-  const StringRef CompDir =
-      CompilationDir.empty() ? CtxCompilationDir : StringRef(CompilationDir);
-  if (LineStr) {
-    // Record path strings, emit references here.
-    LineStr->emitRef(MCOS, CompDir);
-    for (const auto &Dir : MCDwarfDirs)
-      LineStr->emitRef(MCOS, Dir);
-  } else {
-    // The list of directory paths.  Compilation directory comes first.
-    MCOS->EmitBytes(CompDir);
-    MCOS->EmitBytes(StringRef("\0", 1));
-    for (const auto &Dir : MCDwarfDirs) {
-      MCOS->EmitBytes(Dir);                // The DirectoryName, and...
-      MCOS->EmitBytes(StringRef("\0", 1)); // its null terminator.
-    }
-  }
-
-  // The file format, which is the inline null-terminated filename and a
-  // directory index.  We don't track file size/timestamp so don't emit them
-  // in the v5 table.  Emit MD5 checksums and source if we have them.
-  uint64_t Entries = 2;
-  if (HasAllMD5)
-    Entries += 1;
-  if (HasSource)
-    Entries += 1;
-  MCOS->EmitIntValue(Entries, 1);
-  MCOS->EmitULEB128IntValue(dwarf::DW_LNCT_path);
-  MCOS->EmitULEB128IntValue(LineStr ? dwarf::DW_FORM_line_strp
-                                    : dwarf::DW_FORM_string);
-  MCOS->EmitULEB128IntValue(dwarf::DW_LNCT_directory_index);
-  MCOS->EmitULEB128IntValue(dwarf::DW_FORM_udata);
-  if (HasAllMD5) {
-    MCOS->EmitULEB128IntValue(dwarf::DW_LNCT_MD5);
-    MCOS->EmitULEB128IntValue(dwarf::DW_FORM_data16);
-  }
-  if (HasSource) {
-    MCOS->EmitULEB128IntValue(dwarf::DW_LNCT_LLVM_source);
-    MCOS->EmitULEB128IntValue(LineStr ? dwarf::DW_FORM_line_strp
-                                      : dwarf::DW_FORM_string);
-  }
-  // Then the counted list of files. The root file is file #0, then emit the
-  // files as provide by .file directives.  To accommodate assembler source
-  // written for DWARF v4 but trying to emit v5, if we didn't see a root file
-  // explicitly, replicate file #1.
-  MCOS->EmitULEB128IntValue(MCDwarfFiles.size());
-  emitOneV5FileEntry(MCOS, RootFile.Name.empty() ? MCDwarfFiles[1] : RootFile,
-                     HasAllMD5, HasSource, LineStr);
-  for (unsigned i = 1; i < MCDwarfFiles.size(); ++i)
-    emitOneV5FileEntry(MCOS, MCDwarfFiles[i], HasAllMD5, HasSource, LineStr);
-}
-
-std::pair<MCSymbol *, MCSymbol *>
-MCDwarfLineTableHeader::Emit(MCStreamer *MCOS, MCDwarfLineTableParams Params,
-                             ArrayRef<char> StandardOpcodeLengths,
-                             Optional<MCDwarfLineStr> &LineStr) const {
-  MCContext &context = MCOS->getContext();
-
-  // Create a symbol at the beginning of the line table.
-  MCSymbol *LineStartSym = Label;
-  if (!LineStartSym)
-    LineStartSym = context.createTempSymbol();
-  // Set the value of the symbol, as we are at the start of the line table.
-  MCOS->EmitLabel(LineStartSym);
-
-  // Create a symbol for the end of the section (to be set when we get there).
-  MCSymbol *LineEndSym = context.createTempSymbol();
-
-  // The first 4 bytes is the total length of the information for this
-  // compilation unit (not including these 4 bytes for the length).
-  emitAbsValue(*MCOS,
-               MakeStartMinusEndExpr(*MCOS, *LineStartSym, *LineEndSym, 4), 4);
-
-  // Next 2 bytes is the Version.
-  unsigned LineTableVersion = context.getDwarfVersion();
-  MCOS->EmitIntValue(LineTableVersion, 2);
-
-  // Keep track of the bytes between the very start and where the header length
-  // comes out.
-  unsigned PreHeaderLengthBytes = 4 + 2;
-
-  // In v5, we get address info next.
-  if (LineTableVersion >= 5) {
-    MCOS->EmitIntValue(context.getAsmInfo()->getCodePointerSize(), 1);
-    MCOS->EmitIntValue(0, 1); // Segment selector; same as EmitGenDwarfAranges.
-    PreHeaderLengthBytes += 2;
-  }
-
-  // Create a symbol for the end of the prologue (to be set when we get there).
-  MCSymbol *ProEndSym = context.createTempSymbol(); // Lprologue_end
-
-  // Length of the prologue, is the next 4 bytes.  This is actually the length
-  // from after the length word, to the end of the prologue.
-  emitAbsValue(*MCOS,
-               MakeStartMinusEndExpr(*MCOS, *LineStartSym, *ProEndSym,
-                                     (PreHeaderLengthBytes + 4)),
-               4);
-
-  // Parameters of the state machine, are next.
-  MCOS->EmitIntValue(context.getAsmInfo()->getMinInstAlignment(), 1);
-  // maximum_operations_per_instruction
-  // For non-VLIW architectures this field is always 1.
-  // FIXME: VLIW architectures need to update this field accordingly.
-  if (LineTableVersion >= 4)
-    MCOS->EmitIntValue(1, 1);
-  MCOS->EmitIntValue(DWARF2_LINE_DEFAULT_IS_STMT, 1);
-  MCOS->EmitIntValue(Params.DWARF2LineBase, 1);
-  MCOS->EmitIntValue(Params.DWARF2LineRange, 1);
-  MCOS->EmitIntValue(StandardOpcodeLengths.size() + 1, 1);
-
-  // Standard opcode lengths
-  for (char Length : StandardOpcodeLengths)
-    MCOS->EmitIntValue(Length, 1);
-
-  // Put out the directory and file tables.  The formats vary depending on
-  // the version.
-  if (LineTableVersion >= 5)
-    emitV5FileDirTables(MCOS, LineStr, context.getCompilationDir());
-  else
-    emitV2FileDirTables(MCOS);
-
-  // This is the end of the prologue, so set the value of the symbol at the
-  // end of the prologue (that was used in a previous expression).
-  MCOS->EmitLabel(ProEndSym);
-
-  return std::make_pair(LineStartSym, LineEndSym);
-}
-
-void MCDwarfLineTable::EmitCU(MCObjectStreamer *MCOS,
-                              MCDwarfLineTableParams Params,
-                              Optional<MCDwarfLineStr> &LineStr) const {
-  MCSymbol *LineEndSym = Header.Emit(MCOS, Params, LineStr).second;
-
-  // Put out the line tables.
-  for (const auto &LineSec : MCLineSections.getMCLineEntries())
-    EmitDwarfLineTable(MCOS, LineSec.first, LineSec.second);
-
-  // This is the end of the section, so set the value of the symbol at the end
-  // of this section (that was used in a previous expression).
-  MCOS->EmitLabel(LineEndSym);
-}
-
-Expected<unsigned> MCDwarfLineTable::tryGetFile(StringRef &Directory,
-                                                StringRef &FileName,
-                                                MD5::MD5Result *Checksum,
-                                                Optional<StringRef> Source,
-                                                unsigned FileNumber) {
-  return Header.tryGetFile(Directory, FileName, Checksum, Source, FileNumber);
-}
-
-Expected<unsigned>
-MCDwarfLineTableHeader::tryGetFile(StringRef &Directory,
-                                   StringRef &FileName,
-                                   MD5::MD5Result *Checksum,
-                                   Optional<StringRef> &Source,
-                                   unsigned FileNumber) {
-  if (Directory == CompilationDir)
-    Directory = "";
-  if (FileName.empty()) {
-    FileName = "<stdin>";
-    Directory = "";
-  }
-  assert(!FileName.empty());
-  // Keep track of whether any or all files have an MD5 checksum.
-  // If any files have embedded source, they all must.
-  if (MCDwarfFiles.empty()) {
-    trackMD5Usage(Checksum);
-    HasSource = (Source != None);
-  }
-  if (FileNumber == 0) {
-    // File numbers start with 1 and/or after any file numbers
-    // allocated by inline-assembler .file directives.
-    FileNumber = MCDwarfFiles.empty() ? 1 : MCDwarfFiles.size();
-    SmallString<256> Buffer;
-    auto IterBool = SourceIdMap.insert(
-        std::make_pair((Directory + Twine('\0') + FileName).toStringRef(Buffer),
-                       FileNumber));
-    if (!IterBool.second)
-      return IterBool.first->second;
-  }
-  // Make space for this FileNumber in the MCDwarfFiles vector if needed.
-  if (FileNumber >= MCDwarfFiles.size())
-    MCDwarfFiles.resize(FileNumber + 1);
-
-  // Get the new MCDwarfFile slot for this FileNumber.
-  MCDwarfFile &File = MCDwarfFiles[FileNumber];
-
-  // It is an error to see the same number more than once.
-  if (!File.Name.empty())
-    return make_error<StringError>("file number already allocated",
-                                   inconvertibleErrorCode());
-
-  // If any files have embedded source, they all must.
-  if (HasSource != (Source != None))
-    return make_error<StringError>("inconsistent use of embedded source",
-                                   inconvertibleErrorCode());
-
-  if (Directory.empty()) {
-    // Separate the directory part from the basename of the FileName.
-    StringRef tFileName = sys::path::filename(FileName);
-    if (!tFileName.empty()) {
-      Directory = sys::path::parent_path(FileName);
-      if (!Directory.empty())
-        FileName = tFileName;
-    }
-  }
-
-  // Find or make an entry in the MCDwarfDirs vector for this Directory.
-  // Capture directory name.
-  unsigned DirIndex;
-  if (Directory.empty()) {
-    // For FileNames with no directories a DirIndex of 0 is used.
-    DirIndex = 0;
-  } else {
-    DirIndex = 0;
-    for (unsigned End = MCDwarfDirs.size(); DirIndex < End; DirIndex++) {
-      if (Directory == MCDwarfDirs[DirIndex])
-        break;
-    }
-    if (DirIndex >= MCDwarfDirs.size())
-      MCDwarfDirs.push_back(Directory);
-    // The DirIndex is one based, as DirIndex of 0 is used for FileNames with
-    // no directories.  MCDwarfDirs[] is unlike MCDwarfFiles[] in that the
-    // directory names are stored at MCDwarfDirs[DirIndex-1] where FileNames
-    // are stored at MCDwarfFiles[FileNumber].Name .
-    DirIndex++;
-  }
-
-  File.Name = FileName;
-  File.DirIndex = DirIndex;
-  File.Checksum = Checksum;
-  trackMD5Usage(Checksum);
-  File.Source = Source;
-  if (Source)
-    HasSource = true;
-
-  // return the allocated FileNumber.
-  return FileNumber;
-}
-
-/// Utility function to emit the encoding to a streamer.
-void MCDwarfLineAddr::Emit(MCStreamer *MCOS, MCDwarfLineTableParams Params,
-                           int64_t LineDelta, uint64_t AddrDelta) {
-  MCContext &Context = MCOS->getContext();
-  SmallString<256> Tmp;
-  raw_svector_ostream OS(Tmp);
-  MCDwarfLineAddr::Encode(Context, Params, LineDelta, AddrDelta, OS);
-  MCOS->EmitBytes(OS.str());
-}
-
-/// Given a special op, return the address skip amount (in units of
-/// DWARF2_LINE_MIN_INSN_LENGTH).
-static uint64_t SpecialAddr(MCDwarfLineTableParams Params, uint64_t op) {
-  return (op - Params.DWARF2LineOpcodeBase) / Params.DWARF2LineRange;
-}
-
-/// Utility function to encode a Dwarf pair of LineDelta and AddrDeltas.
-void MCDwarfLineAddr::Encode(MCContext &Context, MCDwarfLineTableParams Params,
-                             int64_t LineDelta, uint64_t AddrDelta,
-                             raw_ostream &OS) {
-  uint64_t Temp, Opcode;
-  bool NeedCopy = false;
-
-  // The maximum address skip amount that can be encoded with a special op.
-  uint64_t MaxSpecialAddrDelta = SpecialAddr(Params, 255);
-
-  // Scale the address delta by the minimum instruction length.
-  AddrDelta = ScaleAddrDelta(Context, AddrDelta);
-
-  // A LineDelta of INT64_MAX is a signal that this is actually a
-  // DW_LNE_end_sequence. We cannot use special opcodes here, since we want the
-  // end_sequence to emit the matrix entry.
-  if (LineDelta == INT64_MAX) {
-    if (AddrDelta == MaxSpecialAddrDelta)
-      OS << char(dwarf::DW_LNS_const_add_pc);
-    else if (AddrDelta) {
-      OS << char(dwarf::DW_LNS_advance_pc);
-      encodeULEB128(AddrDelta, OS);
-    }
-    OS << char(dwarf::DW_LNS_extended_op);
-    OS << char(1);
-    OS << char(dwarf::DW_LNE_end_sequence);
-    return;
-  }
-
-  // Bias the line delta by the base.
-  Temp = LineDelta - Params.DWARF2LineBase;
-
-  // If the line increment is out of range of a special opcode, we must encode
-  // it with DW_LNS_advance_line.
-  if (Temp >= Params.DWARF2LineRange ||
-      Temp + Params.DWARF2LineOpcodeBase > 255) {
-    OS << char(dwarf::DW_LNS_advance_line);
-    encodeSLEB128(LineDelta, OS);
-
-    LineDelta = 0;
-    Temp = 0 - Params.DWARF2LineBase;
-    NeedCopy = true;
-  }
-
-  // Use DW_LNS_copy instead of a "line +0, addr +0" special opcode.
-  if (LineDelta == 0 && AddrDelta == 0) {
-    OS << char(dwarf::DW_LNS_copy);
-    return;
-  }
-
-  // Bias the opcode by the special opcode base.
-  Temp += Params.DWARF2LineOpcodeBase;
-
-  // Avoid overflow when addr_delta is large.
-  if (AddrDelta < 256 + MaxSpecialAddrDelta) {
-    // Try using a special opcode.
-    Opcode = Temp + AddrDelta * Params.DWARF2LineRange;
-    if (Opcode <= 255) {
-      OS << char(Opcode);
-      return;
-    }
-
-    // Try using DW_LNS_const_add_pc followed by special op.
-    Opcode = Temp + (AddrDelta - MaxSpecialAddrDelta) * Params.DWARF2LineRange;
-    if (Opcode <= 255) {
-      OS << char(dwarf::DW_LNS_const_add_pc);
-      OS << char(Opcode);
-      return;
-    }
-  }
-
-  // Otherwise use DW_LNS_advance_pc.
-  OS << char(dwarf::DW_LNS_advance_pc);
-  encodeULEB128(AddrDelta, OS);
-
-  if (NeedCopy)
-    OS << char(dwarf::DW_LNS_copy);
-  else {
-    assert(Temp <= 255 && "Buggy special opcode encoding.");
-    OS << char(Temp);
-  }
-}
-
-bool MCDwarfLineAddr::FixedEncode(MCContext &Context,
-                                  MCDwarfLineTableParams Params,
-                                  int64_t LineDelta, uint64_t AddrDelta,
-                                  raw_ostream &OS,
-                                  uint32_t *Offset, uint32_t *Size) {
-  if (LineDelta != INT64_MAX) {
-    OS << char(dwarf::DW_LNS_advance_line);
-    encodeSLEB128(LineDelta, OS);
-  }
-
-  // Use address delta to adjust address or use absolute address to adjust
-  // address.
-  bool SetDelta;
-  // According to DWARF spec., the DW_LNS_fixed_advance_pc opcode takes a
-  // single uhalf (unencoded) operand. So, the maximum value of AddrDelta
-  // is 65535. We set a conservative upper bound for it for relaxation.
-  if (AddrDelta > 60000) {
-    const MCAsmInfo *asmInfo = Context.getAsmInfo();
-    unsigned AddrSize = asmInfo->getCodePointerSize();
-
-    OS << char(dwarf::DW_LNS_extended_op);
-    encodeULEB128(1 + AddrSize, OS);
-    OS << char(dwarf::DW_LNE_set_address);
-    // Generate fixup for the address.
-    *Offset = OS.tell();
-    *Size = AddrSize;
-    SetDelta = false;
-    std::vector<uint8_t> FillData;
-    FillData.insert(FillData.begin(), AddrSize, 0);
-    OS.write(reinterpret_cast<char *>(FillData.data()), AddrSize);
-  } else {
-    OS << char(dwarf::DW_LNS_fixed_advance_pc);
-    // Generate fixup for 2-bytes address delta.
-    *Offset = OS.tell();
-    *Size = 2;
-    SetDelta = true;
-    OS << char(0);
-    OS << char(0);
-  }
-
-  if (LineDelta == INT64_MAX) {
-    OS << char(dwarf::DW_LNS_extended_op);
-    OS << char(1);
-    OS << char(dwarf::DW_LNE_end_sequence);
-  } else {
-    OS << char(dwarf::DW_LNS_copy);
-  }
-
-  return SetDelta;
-}
-
-// Utility function to write a tuple for .debug_abbrev.
-static void EmitAbbrev(MCStreamer *MCOS, uint64_t Name, uint64_t Form) {
-  MCOS->EmitULEB128IntValue(Name);
-  MCOS->EmitULEB128IntValue(Form);
-}
-
-// When generating dwarf for assembly source files this emits
-// the data for .debug_abbrev section which contains three DIEs.
-static void EmitGenDwarfAbbrev(MCStreamer *MCOS) {
-  MCContext &context = MCOS->getContext();
-  MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection());
-
-  // DW_TAG_compile_unit DIE abbrev (1).
-  MCOS->EmitULEB128IntValue(1);
-  MCOS->EmitULEB128IntValue(dwarf::DW_TAG_compile_unit);
-  MCOS->EmitIntValue(dwarf::DW_CHILDREN_yes, 1);
-  EmitAbbrev(MCOS, dwarf::DW_AT_stmt_list, context.getDwarfVersion() >= 4
-                                               ? dwarf::DW_FORM_sec_offset
-                                               : dwarf::DW_FORM_data4);
-  if (context.getGenDwarfSectionSyms().size() > 1 &&
-      context.getDwarfVersion() >= 3) {
-    EmitAbbrev(MCOS, dwarf::DW_AT_ranges, context.getDwarfVersion() >= 4
-                                              ? dwarf::DW_FORM_sec_offset
-                                              : dwarf::DW_FORM_data4);
-  } else {
-    EmitAbbrev(MCOS, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr);
-    EmitAbbrev(MCOS, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr);
-  }
-  EmitAbbrev(MCOS, dwarf::DW_AT_name, dwarf::DW_FORM_string);
-  if (!context.getCompilationDir().empty())
-    EmitAbbrev(MCOS, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string);
-  StringRef DwarfDebugFlags = context.getDwarfDebugFlags();
-  if (!DwarfDebugFlags.empty())
-    EmitAbbrev(MCOS, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string);
-  EmitAbbrev(MCOS, dwarf::DW_AT_producer, dwarf::DW_FORM_string);
-  EmitAbbrev(MCOS, dwarf::DW_AT_language, dwarf::DW_FORM_data2);
-  EmitAbbrev(MCOS, 0, 0);
-
-  // DW_TAG_label DIE abbrev (2).
-  MCOS->EmitULEB128IntValue(2);
-  MCOS->EmitULEB128IntValue(dwarf::DW_TAG_label);
-  MCOS->EmitIntValue(dwarf::DW_CHILDREN_yes, 1);
-  EmitAbbrev(MCOS, dwarf::DW_AT_name, dwarf::DW_FORM_string);
-  EmitAbbrev(MCOS, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data4);
-  EmitAbbrev(MCOS, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data4);
-  EmitAbbrev(MCOS, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr);
-  EmitAbbrev(MCOS, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag);
-  EmitAbbrev(MCOS, 0, 0);
-
-  // DW_TAG_unspecified_parameters DIE abbrev (3).
-  MCOS->EmitULEB128IntValue(3);
-  MCOS->EmitULEB128IntValue(dwarf::DW_TAG_unspecified_parameters);
-  MCOS->EmitIntValue(dwarf::DW_CHILDREN_no, 1);
-  EmitAbbrev(MCOS, 0, 0);
-
-  // Terminate the abbreviations for this compilation unit.
-  MCOS->EmitIntValue(0, 1);
-}
-
-// When generating dwarf for assembly source files this emits the data for
-// .debug_aranges section. This section contains a header and a table of pairs
-// of PointerSize'ed values for the address and size of section(s) with line
-// table entries.
-static void EmitGenDwarfAranges(MCStreamer *MCOS,
-                                const MCSymbol *InfoSectionSymbol) {
-  MCContext &context = MCOS->getContext();
-
-  auto &Sections = context.getGenDwarfSectionSyms();
-
-  MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfARangesSection());
-
-  // This will be the length of the .debug_aranges section, first account for
-  // the size of each item in the header (see below where we emit these items).
-  int Length = 4 + 2 + 4 + 1 + 1;
-
-  // Figure the padding after the header before the table of address and size
-  // pairs who's values are PointerSize'ed.
-  const MCAsmInfo *asmInfo = context.getAsmInfo();
-  int AddrSize = asmInfo->getCodePointerSize();
-  int Pad = 2 * AddrSize - (Length & (2 * AddrSize - 1));
-  if (Pad == 2 * AddrSize)
-    Pad = 0;
-  Length += Pad;
-
-  // Add the size of the pair of PointerSize'ed values for the address and size
-  // of each section we have in the table.
-  Length += 2 * AddrSize * Sections.size();
-  // And the pair of terminating zeros.
-  Length += 2 * AddrSize;
-
-  // Emit the header for this section.
-  // The 4 byte length not including the 4 byte value for the length.
-  MCOS->EmitIntValue(Length - 4, 4);
-  // The 2 byte version, which is 2.
-  MCOS->EmitIntValue(2, 2);
-  // The 4 byte offset to the compile unit in the .debug_info from the start
-  // of the .debug_info.
-  if (InfoSectionSymbol)
-    MCOS->EmitSymbolValue(InfoSectionSymbol, 4,
-                          asmInfo->needsDwarfSectionOffsetDirective());
-  else
-    MCOS->EmitIntValue(0, 4);
-  // The 1 byte size of an address.
-  MCOS->EmitIntValue(AddrSize, 1);
-  // The 1 byte size of a segment descriptor, we use a value of zero.
-  MCOS->EmitIntValue(0, 1);
-  // Align the header with the padding if needed, before we put out the table.
-  for(int i = 0; i < Pad; i++)
-    MCOS->EmitIntValue(0, 1);
-
-  // Now emit the table of pairs of PointerSize'ed values for the section
-  // addresses and sizes.
-  for (MCSection *Sec : Sections) {
-    const MCSymbol *StartSymbol = Sec->getBeginSymbol();
-    MCSymbol *EndSymbol = Sec->getEndSymbol(context);
-    assert(StartSymbol && "StartSymbol must not be NULL");
-    assert(EndSymbol && "EndSymbol must not be NULL");
-
-    const MCExpr *Addr = MCSymbolRefExpr::create(
-      StartSymbol, MCSymbolRefExpr::VK_None, context);
-    const MCExpr *Size = MakeStartMinusEndExpr(*MCOS,
-      *StartSymbol, *EndSymbol, 0);
-    MCOS->EmitValue(Addr, AddrSize);
-    emitAbsValue(*MCOS, Size, AddrSize);
-  }
-
-  // And finally the pair of terminating zeros.
-  MCOS->EmitIntValue(0, AddrSize);
-  MCOS->EmitIntValue(0, AddrSize);
-}
-
-// When generating dwarf for assembly source files this emits the data for
-// .debug_info section which contains three parts.  The header, the compile_unit
-// DIE and a list of label DIEs.
-static void EmitGenDwarfInfo(MCStreamer *MCOS,
-                             const MCSymbol *AbbrevSectionSymbol,
-                             const MCSymbol *LineSectionSymbol,
-                             const MCSymbol *RangesSectionSymbol) {
-  MCContext &context = MCOS->getContext();
-
-  MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection());
-
-  // Create a symbol at the start and end of this section used in here for the
-  // expression to calculate the length in the header.
-  MCSymbol *InfoStart = context.createTempSymbol();
-  MCOS->EmitLabel(InfoStart);
-  MCSymbol *InfoEnd = context.createTempSymbol();
-
-  // First part: the header.
-
-  // The 4 byte total length of the information for this compilation unit, not
-  // including these 4 bytes.
-  const MCExpr *Length = MakeStartMinusEndExpr(*MCOS, *InfoStart, *InfoEnd, 4);
-  emitAbsValue(*MCOS, Length, 4);
-
-  // The 2 byte DWARF version.
-  MCOS->EmitIntValue(context.getDwarfVersion(), 2);
-
-  // The DWARF v5 header has unit type, address size, abbrev offset.
-  // Earlier versions have abbrev offset, address size.
-  const MCAsmInfo &AsmInfo = *context.getAsmInfo();
-  int AddrSize = AsmInfo.getCodePointerSize();
-  if (context.getDwarfVersion() >= 5) {
-    MCOS->EmitIntValue(dwarf::DW_UT_compile, 1);
-    MCOS->EmitIntValue(AddrSize, 1);
-  }
-  // The 4 byte offset to the debug abbrevs from the start of the .debug_abbrev,
-  // it is at the start of that section so this is zero.
-  if (AbbrevSectionSymbol == nullptr)
-    MCOS->EmitIntValue(0, 4);
-  else
-    MCOS->EmitSymbolValue(AbbrevSectionSymbol, 4,
-                          AsmInfo.needsDwarfSectionOffsetDirective());
-  if (context.getDwarfVersion() <= 4)
-    MCOS->EmitIntValue(AddrSize, 1);
-
-  // Second part: the compile_unit DIE.
-
-  // The DW_TAG_compile_unit DIE abbrev (1).
-  MCOS->EmitULEB128IntValue(1);
-
-  // DW_AT_stmt_list, a 4 byte offset from the start of the .debug_line section,
-  // which is at the start of that section so this is zero.
-  if (LineSectionSymbol)
-    MCOS->EmitSymbolValue(LineSectionSymbol, 4,
-                          AsmInfo.needsDwarfSectionOffsetDirective());
-  else
-    MCOS->EmitIntValue(0, 4);
-
-  if (RangesSectionSymbol) {
-    // There are multiple sections containing code, so we must use the
-    // .debug_ranges sections.
-
-    // AT_ranges, the 4 byte offset from the start of the .debug_ranges section
-    // to the address range list for this compilation unit.
-    MCOS->EmitSymbolValue(RangesSectionSymbol, 4);
-  } else {
-    // If we only have one non-empty code section, we can use the simpler
-    // AT_low_pc and AT_high_pc attributes.
-
-    // Find the first (and only) non-empty text section
-    auto &Sections = context.getGenDwarfSectionSyms();
-    const auto TextSection = Sections.begin();
-    assert(TextSection != Sections.end() && "No text section found");
-
-    MCSymbol *StartSymbol = (*TextSection)->getBeginSymbol();
-    MCSymbol *EndSymbol = (*TextSection)->getEndSymbol(context);
-    assert(StartSymbol && "StartSymbol must not be NULL");
-    assert(EndSymbol && "EndSymbol must not be NULL");
-
-    // AT_low_pc, the first address of the default .text section.
-    const MCExpr *Start = MCSymbolRefExpr::create(
-        StartSymbol, MCSymbolRefExpr::VK_None, context);
-    MCOS->EmitValue(Start, AddrSize);
-
-    // AT_high_pc, the last address of the default .text section.
-    const MCExpr *End = MCSymbolRefExpr::create(
-      EndSymbol, MCSymbolRefExpr::VK_None, context);
-    MCOS->EmitValue(End, AddrSize);
-  }
-
-  // AT_name, the name of the source file.  Reconstruct from the first directory
-  // and file table entries.
-  const SmallVectorImpl<std::string> &MCDwarfDirs = context.getMCDwarfDirs();
-  if (MCDwarfDirs.size() > 0) {
-    MCOS->EmitBytes(MCDwarfDirs[0]);
-    MCOS->EmitBytes(sys::path::get_separator());
-  }
-  const SmallVectorImpl<MCDwarfFile> &MCDwarfFiles =
-    MCOS->getContext().getMCDwarfFiles();
-  MCOS->EmitBytes(MCDwarfFiles[1].Name);
-  MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string.
-
-  // AT_comp_dir, the working directory the assembly was done in.
-  if (!context.getCompilationDir().empty()) {
-    MCOS->EmitBytes(context.getCompilationDir());
-    MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string.
-  }
-
-  // AT_APPLE_flags, the command line arguments of the assembler tool.
-  StringRef DwarfDebugFlags = context.getDwarfDebugFlags();
-  if (!DwarfDebugFlags.empty()){
-    MCOS->EmitBytes(DwarfDebugFlags);
-    MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string.
-  }
-
-  // AT_producer, the version of the assembler tool.
-  StringRef DwarfDebugProducer = context.getDwarfDebugProducer();
-  if (!DwarfDebugProducer.empty())
-    MCOS->EmitBytes(DwarfDebugProducer);
-  else
-    MCOS->EmitBytes(StringRef("llvm-mc (based on LLVM " PACKAGE_VERSION ")"));
-  MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string.
-
-  // AT_language, a 4 byte value.  We use DW_LANG_Mips_Assembler as the dwarf2
-  // draft has no standard code for assembler.
-  MCOS->EmitIntValue(dwarf::DW_LANG_Mips_Assembler, 2);
-
-  // Third part: the list of label DIEs.
-
-  // Loop on saved info for dwarf labels and create the DIEs for them.
-  const std::vector<MCGenDwarfLabelEntry> &Entries =
-      MCOS->getContext().getMCGenDwarfLabelEntries();
-  for (const auto &Entry : Entries) {
-    // The DW_TAG_label DIE abbrev (2).
-    MCOS->EmitULEB128IntValue(2);
-
-    // AT_name, of the label without any leading underbar.
-    MCOS->EmitBytes(Entry.getName());
-    MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string.
-
-    // AT_decl_file, index into the file table.
-    MCOS->EmitIntValue(Entry.getFileNumber(), 4);
-
-    // AT_decl_line, source line number.
-    MCOS->EmitIntValue(Entry.getLineNumber(), 4);
-
-    // AT_low_pc, start address of the label.
-    const MCExpr *AT_low_pc = MCSymbolRefExpr::create(Entry.getLabel(),
-                                             MCSymbolRefExpr::VK_None, context);
-    MCOS->EmitValue(AT_low_pc, AddrSize);
-
-    // DW_AT_prototyped, a one byte flag value of 0 saying we have no prototype.
-    MCOS->EmitIntValue(0, 1);
-
-    // The DW_TAG_unspecified_parameters DIE abbrev (3).
-    MCOS->EmitULEB128IntValue(3);
-
-    // Add the NULL DIE terminating the DW_TAG_unspecified_parameters DIE's.
-    MCOS->EmitIntValue(0, 1);
-  }
-
-  // Add the NULL DIE terminating the Compile Unit DIE's.
-  MCOS->EmitIntValue(0, 1);
-
-  // Now set the value of the symbol at the end of the info section.
-  MCOS->EmitLabel(InfoEnd);
-}
-
-// When generating dwarf for assembly source files this emits the data for
-// .debug_ranges section. We only emit one range list, which spans all of the
-// executable sections of this file.
-static void EmitGenDwarfRanges(MCStreamer *MCOS) {
-  MCContext &context = MCOS->getContext();
-  auto &Sections = context.getGenDwarfSectionSyms();
-
-  const MCAsmInfo *AsmInfo = context.getAsmInfo();
-  int AddrSize = AsmInfo->getCodePointerSize();
-
-  MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfRangesSection());
-
-  for (MCSection *Sec : Sections) {
-    const MCSymbol *StartSymbol = Sec->getBeginSymbol();
-    MCSymbol *EndSymbol = Sec->getEndSymbol(context);
-    assert(StartSymbol && "StartSymbol must not be NULL");
-    assert(EndSymbol && "EndSymbol must not be NULL");
-
-    // Emit a base address selection entry for the start of this section
-    const MCExpr *SectionStartAddr = MCSymbolRefExpr::create(
-      StartSymbol, MCSymbolRefExpr::VK_None, context);
-    MCOS->emitFill(AddrSize, 0xFF);
-    MCOS->EmitValue(SectionStartAddr, AddrSize);
-
-    // Emit a range list entry spanning this section
-    const MCExpr *SectionSize = MakeStartMinusEndExpr(*MCOS,
-      *StartSymbol, *EndSymbol, 0);
-    MCOS->EmitIntValue(0, AddrSize);
-    emitAbsValue(*MCOS, SectionSize, AddrSize);
-  }
-
-  // Emit end of list entry
-  MCOS->EmitIntValue(0, AddrSize);
-  MCOS->EmitIntValue(0, AddrSize);
-}
-
-//
-// When generating dwarf for assembly source files this emits the Dwarf
-// sections.
-//
-void MCGenDwarfInfo::Emit(MCStreamer *MCOS) {
-  MCContext &context = MCOS->getContext();
-
-  // Create the dwarf sections in this order (.debug_line already created).
-  const MCAsmInfo *AsmInfo = context.getAsmInfo();
-  bool CreateDwarfSectionSymbols =
-      AsmInfo->doesDwarfUseRelocationsAcrossSections();
-  MCSymbol *LineSectionSymbol = nullptr;
-  if (CreateDwarfSectionSymbols)
-    LineSectionSymbol = MCOS->getDwarfLineTableSymbol(0);
-  MCSymbol *AbbrevSectionSymbol = nullptr;
-  MCSymbol *InfoSectionSymbol = nullptr;
-  MCSymbol *RangesSectionSymbol = nullptr;
-
-  // Create end symbols for each section, and remove empty sections
-  MCOS->getContext().finalizeDwarfSections(*MCOS);
-
-  // If there are no sections to generate debug info for, we don't need
-  // to do anything
-  if (MCOS->getContext().getGenDwarfSectionSyms().empty())
-    return;
-
-  // We only use the .debug_ranges section if we have multiple code sections,
-  // and we are emitting a DWARF version which supports it.
-  const bool UseRangesSection =
-      MCOS->getContext().getGenDwarfSectionSyms().size() > 1 &&
-      MCOS->getContext().getDwarfVersion() >= 3;
-  CreateDwarfSectionSymbols |= UseRangesSection;
-
-  MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection());
-  if (CreateDwarfSectionSymbols) {
-    InfoSectionSymbol = context.createTempSymbol();
-    MCOS->EmitLabel(InfoSectionSymbol);
-  }
-  MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection());
-  if (CreateDwarfSectionSymbols) {
-    AbbrevSectionSymbol = context.createTempSymbol();
-    MCOS->EmitLabel(AbbrevSectionSymbol);
-  }
-  if (UseRangesSection) {
-    MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfRangesSection());
-    if (CreateDwarfSectionSymbols) {
-      RangesSectionSymbol = context.createTempSymbol();
-      MCOS->EmitLabel(RangesSectionSymbol);
-    }
-  }
-
-  assert((RangesSectionSymbol != nullptr) || !UseRangesSection);
-
-  MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfARangesSection());
-
-  // Output the data for .debug_aranges section.
-  EmitGenDwarfAranges(MCOS, InfoSectionSymbol);
-
-  if (UseRangesSection)
-    EmitGenDwarfRanges(MCOS);
-
-  // Output the data for .debug_abbrev section.
-  EmitGenDwarfAbbrev(MCOS);
-
-  // Output the data for .debug_info section.
-  EmitGenDwarfInfo(MCOS, AbbrevSectionSymbol, LineSectionSymbol,
-                   RangesSectionSymbol);
-}
-
-//
-// When generating dwarf for assembly source files this is called when symbol
-// for a label is created.  If this symbol is not a temporary and is in the
-// section that dwarf is being generated for, save the needed info to create
-// a dwarf label.
-//
-void MCGenDwarfLabelEntry::Make(MCSymbol *Symbol, MCStreamer *MCOS,
-                                     SourceMgr &SrcMgr, SMLoc &Loc) {
-  // We won't create dwarf labels for temporary symbols.
-  if (Symbol->isTemporary())
-    return;
-  MCContext &context = MCOS->getContext();
-  // We won't create dwarf labels for symbols in sections that we are not
-  // generating debug info for.
-  if (!context.getGenDwarfSectionSyms().count(MCOS->getCurrentSectionOnly()))
-    return;
-
-  // The dwarf label's name does not have the symbol name's leading
-  // underbar if any.
-  StringRef Name = Symbol->getName();
-  if (Name.startswith("_"))
-    Name = Name.substr(1, Name.size()-1);
-
-  // Get the dwarf file number to be used for the dwarf label.
-  unsigned FileNumber = context.getGenDwarfFileNumber();
-
-  // Finding the line number is the expensive part which is why we just don't
-  // pass it in as for some symbols we won't create a dwarf label.
-  unsigned CurBuffer = SrcMgr.FindBufferContainingLoc(Loc);
-  unsigned LineNumber = SrcMgr.FindLineNumber(Loc, CurBuffer);
-
-  // We create a temporary symbol for use for the AT_high_pc and AT_low_pc
-  // values so that they don't have things like an ARM thumb bit from the
-  // original symbol. So when used they won't get a low bit set after
-  // relocation.
-  MCSymbol *Label = context.createTempSymbol();
-  MCOS->EmitLabel(Label);
-
-  // Create and entry for the info and add it to the other entries.
-  MCOS->getContext().addMCGenDwarfLabelEntry(
-      MCGenDwarfLabelEntry(Name, FileNumber, LineNumber, Label));
-}
-
-static int getDataAlignmentFactor(MCStreamer &streamer) {
-  MCContext &context = streamer.getContext();
-  const MCAsmInfo *asmInfo = context.getAsmInfo();
-  int size = asmInfo->getCalleeSaveStackSlotSize();
-  if (asmInfo->isStackGrowthDirectionUp())
-    return size;
-  else
-    return -size;
-}
-
-static unsigned getSizeForEncoding(MCStreamer &streamer,
-                                   unsigned symbolEncoding) {
-  MCContext &context = streamer.getContext();
-  unsigned format = symbolEncoding & 0x0f;
-  switch (format) {
-  default: llvm_unreachable("Unknown Encoding");
-  case dwarf::DW_EH_PE_absptr:
-  case dwarf::DW_EH_PE_signed:
-    return context.getAsmInfo()->getCodePointerSize();
-  case dwarf::DW_EH_PE_udata2:
-  case dwarf::DW_EH_PE_sdata2:
-    return 2;
-  case dwarf::DW_EH_PE_udata4:
-  case dwarf::DW_EH_PE_sdata4:
-    return 4;
-  case dwarf::DW_EH_PE_udata8:
-  case dwarf::DW_EH_PE_sdata8:
-    return 8;
-  }
-}
-
-static void emitFDESymbol(MCObjectStreamer &streamer, const MCSymbol &symbol,
-                       unsigned symbolEncoding, bool isEH) {
-  MCContext &context = streamer.getContext();
-  const MCAsmInfo *asmInfo = context.getAsmInfo();
-  const MCExpr *v = asmInfo->getExprForFDESymbol(&symbol,
-                                                 symbolEncoding,
-                                                 streamer);
-  unsigned size = getSizeForEncoding(streamer, symbolEncoding);
-  if (asmInfo->doDwarfFDESymbolsUseAbsDiff() && isEH)
-    emitAbsValue(streamer, v, size);
-  else
-    streamer.EmitValue(v, size);
-}
-
-static void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol,
-                            unsigned symbolEncoding) {
-  MCContext &context = streamer.getContext();
-  const MCAsmInfo *asmInfo = context.getAsmInfo();
-  const MCExpr *v = asmInfo->getExprForPersonalitySymbol(&symbol,
-                                                         symbolEncoding,
-                                                         streamer);
-  unsigned size = getSizeForEncoding(streamer, symbolEncoding);
-  streamer.EmitValue(v, size);
-}
-
-namespace {
-
-class FrameEmitterImpl {
-  int CFAOffset = 0;
-  int InitialCFAOffset = 0;
-  bool IsEH;
-  MCObjectStreamer &Streamer;
-
-public:
-  FrameEmitterImpl(bool IsEH, MCObjectStreamer &Streamer)
-      : IsEH(IsEH), Streamer(Streamer) {}
-
-  /// Emit the unwind information in a compact way.
-  void EmitCompactUnwind(const MCDwarfFrameInfo &frame);
-
-  const MCSymbol &EmitCIE(const MCDwarfFrameInfo &F);
-  void EmitFDE(const MCSymbol &cieStart, const MCDwarfFrameInfo &frame,
-               bool LastInSection, const MCSymbol &SectionStart);
-  void EmitCFIInstructions(ArrayRef<MCCFIInstruction> Instrs,
-                           MCSymbol *BaseLabel);
-  void EmitCFIInstruction(const MCCFIInstruction &Instr);
-};
-
-} // end anonymous namespace
-
-static void emitEncodingByte(MCObjectStreamer &Streamer, unsigned Encoding) {
-  Streamer.EmitIntValue(Encoding, 1);
-}
-
-void FrameEmitterImpl::EmitCFIInstruction(const MCCFIInstruction &Instr) {
-  int dataAlignmentFactor = getDataAlignmentFactor(Streamer);
-  auto *MRI = Streamer.getContext().getRegisterInfo();
-
-  switch (Instr.getOperation()) {
-  case MCCFIInstruction::OpRegister: {
-    unsigned Reg1 = Instr.getRegister();
-    unsigned Reg2 = Instr.getRegister2();
-    if (!IsEH) {
-      Reg1 = MRI->getDwarfRegNumFromDwarfEHRegNum(Reg1);
-      Reg2 = MRI->getDwarfRegNumFromDwarfEHRegNum(Reg2);
-    }
-    Streamer.EmitIntValue(dwarf::DW_CFA_register, 1);
-    Streamer.EmitULEB128IntValue(Reg1);
-    Streamer.EmitULEB128IntValue(Reg2);
-    return;
-  }
-  case MCCFIInstruction::OpWindowSave:
-    Streamer.EmitIntValue(dwarf::DW_CFA_GNU_window_save, 1);
-    return;
-
-  case MCCFIInstruction::OpNegateRAState:
-    Streamer.EmitIntValue(dwarf::DW_CFA_AARCH64_negate_ra_state, 1);
-    return;
-
-  case MCCFIInstruction::OpUndefined: {
-    unsigned Reg = Instr.getRegister();
-    Streamer.EmitIntValue(dwarf::DW_CFA_undefined, 1);
-    Streamer.EmitULEB128IntValue(Reg);
-    return;
-  }
-  case MCCFIInstruction::OpAdjustCfaOffset:
-  case MCCFIInstruction::OpDefCfaOffset: {
-    const bool IsRelative =
-      Instr.getOperation() == MCCFIInstruction::OpAdjustCfaOffset;
-
-    Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1);
-
-    if (IsRelative)
-      CFAOffset += Instr.getOffset();
-    else
-      CFAOffset = -Instr.getOffset();
-
-    Streamer.EmitULEB128IntValue(CFAOffset);
-
-    return;
-  }
-  case MCCFIInstruction::OpDefCfa: {
-    unsigned Reg = Instr.getRegister();
-    if (!IsEH)
-      Reg = MRI->getDwarfRegNumFromDwarfEHRegNum(Reg);
-    Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1);
-    Streamer.EmitULEB128IntValue(Reg);
-    CFAOffset = -Instr.getOffset();
-    Streamer.EmitULEB128IntValue(CFAOffset);
-
-    return;
-  }
-  case MCCFIInstruction::OpDefCfaRegister: {
-    unsigned Reg = Instr.getRegister();
-    if (!IsEH)
-      Reg = MRI->getDwarfRegNumFromDwarfEHRegNum(Reg);
-    Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1);
-    Streamer.EmitULEB128IntValue(Reg);
-
-    return;
-  }
-  case MCCFIInstruction::OpOffset:
-  case MCCFIInstruction::OpRelOffset: {
-    const bool IsRelative =
-      Instr.getOperation() == MCCFIInstruction::OpRelOffset;
-
-    unsigned Reg = Instr.getRegister();
-    if (!IsEH)
-      Reg = MRI->getDwarfRegNumFromDwarfEHRegNum(Reg);
-
-    int Offset = Instr.getOffset();
-    if (IsRelative)
-      Offset -= CFAOffset;
-    Offset = Offset / dataAlignmentFactor;
-
-    if (Offset < 0) {
-      Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended_sf, 1);
-      Streamer.EmitULEB128IntValue(Reg);
-      Streamer.EmitSLEB128IntValue(Offset);
-    } else if (Reg < 64) {
-      Streamer.EmitIntValue(dwarf::DW_CFA_offset + Reg, 1);
-      Streamer.EmitULEB128IntValue(Offset);
-    } else {
-      Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended, 1);
-      Streamer.EmitULEB128IntValue(Reg);
-      Streamer.EmitULEB128IntValue(Offset);
-    }
-    return;
-  }
-  case MCCFIInstruction::OpRememberState:
-    Streamer.EmitIntValue(dwarf::DW_CFA_remember_state, 1);
-    return;
-  case MCCFIInstruction::OpRestoreState:
-    Streamer.EmitIntValue(dwarf::DW_CFA_restore_state, 1);
-    return;
-  case MCCFIInstruction::OpSameValue: {
-    unsigned Reg = Instr.getRegister();
-    Streamer.EmitIntValue(dwarf::DW_CFA_same_value, 1);
-    Streamer.EmitULEB128IntValue(Reg);
-    return;
-  }
-  case MCCFIInstruction::OpRestore: {
-    unsigned Reg = Instr.getRegister();
-    if (!IsEH)
-      Reg = MRI->getDwarfRegNumFromDwarfEHRegNum(Reg);
-    if (Reg < 64) {
-      Streamer.EmitIntValue(dwarf::DW_CFA_restore | Reg, 1);
-    } else {
-      Streamer.EmitIntValue(dwarf::DW_CFA_restore_extended, 1);
-      Streamer.EmitULEB128IntValue(Reg);
-    }
-    return;
-  }
-  case MCCFIInstruction::OpGnuArgsSize:
-    Streamer.EmitIntValue(dwarf::DW_CFA_GNU_args_size, 1);
-    Streamer.EmitULEB128IntValue(Instr.getOffset());
-    return;
-
-  case MCCFIInstruction::OpEscape:
-    Streamer.EmitBytes(Instr.getValues());
-    return;
-  }
-  llvm_unreachable("Unhandled case in switch");
-}
-
-/// Emit frame instructions to describe the layout of the frame.
-void FrameEmitterImpl::EmitCFIInstructions(ArrayRef<MCCFIInstruction> Instrs,
-                                           MCSymbol *BaseLabel) {
-  for (const MCCFIInstruction &Instr : Instrs) {
-    MCSymbol *Label = Instr.getLabel();
-    // Throw out move if the label is invalid.
-    if (Label && !Label->isDefined()) continue; // Not emitted, in dead code.
-
-    // Advance row if new location.
-    if (BaseLabel && Label) {
-      MCSymbol *ThisSym = Label;
-      if (ThisSym != BaseLabel) {
-        Streamer.EmitDwarfAdvanceFrameAddr(BaseLabel, ThisSym);
-        BaseLabel = ThisSym;
-      }
-    }
-
-    EmitCFIInstruction(Instr);
-  }
-}
-
-/// Emit the unwind information in a compact way.
-void FrameEmitterImpl::EmitCompactUnwind(const MCDwarfFrameInfo &Frame) {
-  MCContext &Context = Streamer.getContext();
-  const MCObjectFileInfo *MOFI = Context.getObjectFileInfo();
-
-  // range-start range-length  compact-unwind-enc personality-func   lsda
-  //  _foo       LfooEnd-_foo  0x00000023          0                 0
-  //  _bar       LbarEnd-_bar  0x00000025         __gxx_personality  except_tab1
-  //
-  //   .section __LD,__compact_unwind,regular,debug
-  //
-  //   # compact unwind for _foo
-  //   .quad _foo
-  //   .set L1,LfooEnd-_foo
-  //   .long L1
-  //   .long 0x01010001
-  //   .quad 0
-  //   .quad 0
-  //
-  //   # compact unwind for _bar
-  //   .quad _bar
-  //   .set L2,LbarEnd-_bar
-  //   .long L2
-  //   .long 0x01020011
-  //   .quad __gxx_personality
-  //   .quad except_tab1
-
-  uint32_t Encoding = Frame.CompactUnwindEncoding;
-  if (!Encoding) return;
-  bool DwarfEHFrameOnly = (Encoding == MOFI->getCompactUnwindDwarfEHFrameOnly());
-
-  // The encoding needs to know we have an LSDA.
-  if (!DwarfEHFrameOnly && Frame.Lsda)
-    Encoding |= 0x40000000;
-
-  // Range Start
-  unsigned FDEEncoding = MOFI->getFDEEncoding();
-  unsigned Size = getSizeForEncoding(Streamer, FDEEncoding);
-  Streamer.EmitSymbolValue(Frame.Begin, Size);
-
-  // Range Length
-  const MCExpr *Range = MakeStartMinusEndExpr(Streamer, *Frame.Begin,
-                                              *Frame.End, 0);
-  emitAbsValue(Streamer, Range, 4);
-
-  // Compact Encoding
-  Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_udata4);
-  Streamer.EmitIntValue(Encoding, Size);
-
-  // Personality Function
-  Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_absptr);
-  if (!DwarfEHFrameOnly && Frame.Personality)
-    Streamer.EmitSymbolValue(Frame.Personality, Size);
-  else
-    Streamer.EmitIntValue(0, Size); // No personality fn
-
-  // LSDA
-  Size = getSizeForEncoding(Streamer, Frame.LsdaEncoding);
-  if (!DwarfEHFrameOnly && Frame.Lsda)
-    Streamer.EmitSymbolValue(Frame.Lsda, Size);
-  else
-    Streamer.EmitIntValue(0, Size); // No LSDA
-}
-
-static unsigned getCIEVersion(bool IsEH, unsigned DwarfVersion) {
-  if (IsEH)
-    return 1;
-  switch (DwarfVersion) {
-  case 2:
-    return 1;
-  case 3:
-    return 3;
-  case 4:
-  case 5:
-    return 4;
-  }
-  llvm_unreachable("Unknown version");
-}
-
-const MCSymbol &FrameEmitterImpl::EmitCIE(const MCDwarfFrameInfo &Frame) {
-  MCContext &context = Streamer.getContext();
-  const MCRegisterInfo *MRI = context.getRegisterInfo();
-  const MCObjectFileInfo *MOFI = context.getObjectFileInfo();
-
-  MCSymbol *sectionStart = context.createTempSymbol();
-  Streamer.EmitLabel(sectionStart);
-
-  MCSymbol *sectionEnd = context.createTempSymbol();
-
-  // Length
-  const MCExpr *Length =
-      MakeStartMinusEndExpr(Streamer, *sectionStart, *sectionEnd, 4);
-  emitAbsValue(Streamer, Length, 4);
-
-  // CIE ID
-  unsigned CIE_ID = IsEH ? 0 : -1;
-  Streamer.EmitIntValue(CIE_ID, 4);
-
-  // Version
-  uint8_t CIEVersion = getCIEVersion(IsEH, context.getDwarfVersion());
-  Streamer.EmitIntValue(CIEVersion, 1);
-
-  if (IsEH) {
-    SmallString<8> Augmentation;
-    Augmentation += "z";
-    if (Frame.Personality)
-      Augmentation += "P";
-    if (Frame.Lsda)
-      Augmentation += "L";
-    Augmentation += "R";
-    if (Frame.IsSignalFrame)
-      Augmentation += "S";
-    if (Frame.IsBKeyFrame)
-      Augmentation += "B";
-    Streamer.EmitBytes(Augmentation);
-  }
-  Streamer.EmitIntValue(0, 1);
-
-  if (CIEVersion >= 4) {
-    // Address Size
-    Streamer.EmitIntValue(context.getAsmInfo()->getCodePointerSize(), 1);
-
-    // Segment Descriptor Size
-    Streamer.EmitIntValue(0, 1);
-  }
-
-  // Code Alignment Factor
-  Streamer.EmitULEB128IntValue(context.getAsmInfo()->getMinInstAlignment());
-
-  // Data Alignment Factor
-  Streamer.EmitSLEB128IntValue(getDataAlignmentFactor(Streamer));
-
-  // Return Address Register
-  unsigned RAReg = Frame.RAReg;
-  if (RAReg == static_cast<unsigned>(INT_MAX))
-    RAReg = MRI->getDwarfRegNum(MRI->getRARegister(), IsEH);
-
-  if (CIEVersion == 1) {
-    assert(RAReg <= 255 &&
-           "DWARF 2 encodes return_address_register in one byte");
-    Streamer.EmitIntValue(RAReg, 1);
-  } else {
-    Streamer.EmitULEB128IntValue(RAReg);
-  }
-
-  // Augmentation Data Length (optional)
-  unsigned augmentationLength = 0;
-  if (IsEH) {
-    if (Frame.Personality) {
-      // Personality Encoding
-      augmentationLength += 1;
-      // Personality
-      augmentationLength +=
-          getSizeForEncoding(Streamer, Frame.PersonalityEncoding);
-    }
-    if (Frame.Lsda)
-      augmentationLength += 1;
-    // Encoding of the FDE pointers
-    augmentationLength += 1;
-
-    Streamer.EmitULEB128IntValue(augmentationLength);
-
-    // Augmentation Data (optional)
-    if (Frame.Personality) {
-      // Personality Encoding
-      emitEncodingByte(Streamer, Frame.PersonalityEncoding);
-      // Personality
-      EmitPersonality(Streamer, *Frame.Personality, Frame.PersonalityEncoding);
-    }
-
-    if (Frame.Lsda)
-      emitEncodingByte(Streamer, Frame.LsdaEncoding);
-
-    // Encoding of the FDE pointers
-    emitEncodingByte(Streamer, MOFI->getFDEEncoding());
-  }
-
-  // Initial Instructions
-
-  const MCAsmInfo *MAI = context.getAsmInfo();
-  if (!Frame.IsSimple) {
-    const std::vector<MCCFIInstruction> &Instructions =
-        MAI->getInitialFrameState();
-    EmitCFIInstructions(Instructions, nullptr);
-  }
-
-  InitialCFAOffset = CFAOffset;
-
-  // Padding
-  Streamer.EmitValueToAlignment(IsEH ? 4 : MAI->getCodePointerSize());
-
-  Streamer.EmitLabel(sectionEnd);
-  return *sectionStart;
-}
-
-void FrameEmitterImpl::EmitFDE(const MCSymbol &cieStart,
-                               const MCDwarfFrameInfo &frame,
-                               bool LastInSection,
-                               const MCSymbol &SectionStart) {
-  MCContext &context = Streamer.getContext();
-  MCSymbol *fdeStart = context.createTempSymbol();
-  MCSymbol *fdeEnd = context.createTempSymbol();
-  const MCObjectFileInfo *MOFI = context.getObjectFileInfo();
-
-  CFAOffset = InitialCFAOffset;
-
-  // Length
-  const MCExpr *Length = MakeStartMinusEndExpr(Streamer, *fdeStart, *fdeEnd, 0);
-  emitAbsValue(Streamer, Length, 4);
-
-  Streamer.EmitLabel(fdeStart);
-
-  // CIE Pointer
-  const MCAsmInfo *asmInfo = context.getAsmInfo();
-  if (IsEH) {
-    const MCExpr *offset =
-        MakeStartMinusEndExpr(Streamer, cieStart, *fdeStart, 0);
-    emitAbsValue(Streamer, offset, 4);
-  } else if (!asmInfo->doesDwarfUseRelocationsAcrossSections()) {
-    const MCExpr *offset =
-        MakeStartMinusEndExpr(Streamer, SectionStart, cieStart, 0);
-    emitAbsValue(Streamer, offset, 4);
-  } else {
-    Streamer.EmitSymbolValue(&cieStart, 4);
-  }
-
-  // PC Begin
-  unsigned PCEncoding =
-      IsEH ? MOFI->getFDEEncoding() : (unsigned)dwarf::DW_EH_PE_absptr;
-  unsigned PCSize = getSizeForEncoding(Streamer, PCEncoding);
-  emitFDESymbol(Streamer, *frame.Begin, PCEncoding, IsEH);
-
-  // PC Range
-  const MCExpr *Range =
-      MakeStartMinusEndExpr(Streamer, *frame.Begin, *frame.End, 0);
-  emitAbsValue(Streamer, Range, PCSize);
-
-  if (IsEH) {
-    // Augmentation Data Length
-    unsigned augmentationLength = 0;
-
-    if (frame.Lsda)
-      augmentationLength += getSizeForEncoding(Streamer, frame.LsdaEncoding);
-
-    Streamer.EmitULEB128IntValue(augmentationLength);
-
-    // Augmentation Data
-    if (frame.Lsda)
-      emitFDESymbol(Streamer, *frame.Lsda, frame.LsdaEncoding, true);
-  }
-
-  // Call Frame Instructions
-  EmitCFIInstructions(frame.Instructions, frame.Begin);
-
-  // Padding
-  // The size of a .eh_frame section has to be a multiple of the alignment
-  // since a null CIE is interpreted as the end. Old systems overaligned
-  // .eh_frame, so we do too and account for it in the last FDE.
-  unsigned Align = LastInSection ? asmInfo->getCodePointerSize() : PCSize;
-  Streamer.EmitValueToAlignment(Align);
-
-  Streamer.EmitLabel(fdeEnd);
-}
-
-namespace {
-
-struct CIEKey {
-  static const CIEKey getEmptyKey() {
-    return CIEKey(nullptr, 0, -1, false, false, static_cast<unsigned>(INT_MAX),
-                  false);
-  }
-
-  static const CIEKey getTombstoneKey() {
-    return CIEKey(nullptr, -1, 0, false, false, static_cast<unsigned>(INT_MAX),
-                  false);
-  }
-
-  CIEKey(const MCSymbol *Personality, unsigned PersonalityEncoding,
-         unsigned LSDAEncoding, bool IsSignalFrame, bool IsSimple,
-         unsigned RAReg, bool IsBKeyFrame)
-      : Personality(Personality), PersonalityEncoding(PersonalityEncoding),
-        LsdaEncoding(LSDAEncoding), IsSignalFrame(IsSignalFrame),
-        IsSimple(IsSimple), RAReg(RAReg), IsBKeyFrame(IsBKeyFrame) {}
-
-  explicit CIEKey(const MCDwarfFrameInfo &Frame)
-      : Personality(Frame.Personality),
-        PersonalityEncoding(Frame.PersonalityEncoding),
-        LsdaEncoding(Frame.LsdaEncoding), IsSignalFrame(Frame.IsSignalFrame),
-        IsSimple(Frame.IsSimple), RAReg(Frame.RAReg),
-        IsBKeyFrame(Frame.IsBKeyFrame) {}
-
-  const MCSymbol *Personality;
-  unsigned PersonalityEncoding;
-  unsigned LsdaEncoding;
-  bool IsSignalFrame;
-  bool IsSimple;
-  unsigned RAReg;
-  bool IsBKeyFrame;
-};
-
-} // end anonymous namespace
-
-namespace llvm {
-
-template <> struct DenseMapInfo<CIEKey> {
-  static CIEKey getEmptyKey() { return CIEKey::getEmptyKey(); }
-  static CIEKey getTombstoneKey() { return CIEKey::getTombstoneKey(); }
-
-  static unsigned getHashValue(const CIEKey &Key) {
-    return static_cast<unsigned>(hash_combine(
-        Key.Personality, Key.PersonalityEncoding, Key.LsdaEncoding,
-        Key.IsSignalFrame, Key.IsSimple, Key.RAReg, Key.IsBKeyFrame));
-  }
-
-  static bool isEqual(const CIEKey &LHS, const CIEKey &RHS) {
-    return LHS.Personality == RHS.Personality &&
-           LHS.PersonalityEncoding == RHS.PersonalityEncoding &&
-           LHS.LsdaEncoding == RHS.LsdaEncoding &&
-           LHS.IsSignalFrame == RHS.IsSignalFrame &&
-           LHS.IsSimple == RHS.IsSimple && LHS.RAReg == RHS.RAReg &&
-           LHS.IsBKeyFrame == RHS.IsBKeyFrame;
-  }
-};
-
-} // end namespace llvm
-
-void MCDwarfFrameEmitter::Emit(MCObjectStreamer &Streamer, MCAsmBackend *MAB,
-                               bool IsEH) {
-  Streamer.generateCompactUnwindEncodings(MAB);
-
-  MCContext &Context = Streamer.getContext();
-  const MCObjectFileInfo *MOFI = Context.getObjectFileInfo();
-  const MCAsmInfo *AsmInfo = Context.getAsmInfo();
-  FrameEmitterImpl Emitter(IsEH, Streamer);
-  ArrayRef<MCDwarfFrameInfo> FrameArray = Streamer.getDwarfFrameInfos();
-
-  // Emit the compact unwind info if available.
-  bool NeedsEHFrameSection = !MOFI->getSupportsCompactUnwindWithoutEHFrame();
-  if (IsEH && MOFI->getCompactUnwindSection()) {
-    bool SectionEmitted = false;
-    for (const MCDwarfFrameInfo &Frame : FrameArray) {
-      if (Frame.CompactUnwindEncoding == 0) continue;
-      if (!SectionEmitted) {
-        Streamer.SwitchSection(MOFI->getCompactUnwindSection());
-        Streamer.EmitValueToAlignment(AsmInfo->getCodePointerSize());
-        SectionEmitted = true;
-      }
-      NeedsEHFrameSection |=
-        Frame.CompactUnwindEncoding ==
-          MOFI->getCompactUnwindDwarfEHFrameOnly();
-      Emitter.EmitCompactUnwind(Frame);
-    }
-  }
-
-  if (!NeedsEHFrameSection) return;
-
-  MCSection &Section =
-      IsEH ? *const_cast<MCObjectFileInfo *>(MOFI)->getEHFrameSection()
-           : *MOFI->getDwarfFrameSection();
-
-  Streamer.SwitchSection(&Section);
-  MCSymbol *SectionStart = Context.createTempSymbol();
-  Streamer.EmitLabel(SectionStart);
-
-  DenseMap<CIEKey, const MCSymbol *> CIEStarts;
-
-  const MCSymbol *DummyDebugKey = nullptr;
-  bool CanOmitDwarf = MOFI->getOmitDwarfIfHaveCompactUnwind();
-  for (auto I = FrameArray.begin(), E = FrameArray.end(); I != E;) {
-    const MCDwarfFrameInfo &Frame = *I;
-    ++I;
-    if (CanOmitDwarf && Frame.CompactUnwindEncoding !=
-          MOFI->getCompactUnwindDwarfEHFrameOnly())
-      // Don't generate an EH frame if we don't need one. I.e., it's taken care
-      // of by the compact unwind encoding.
-      continue;
-
-    CIEKey Key(Frame);
-    const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey;
-    if (!CIEStart)
-      CIEStart = &Emitter.EmitCIE(Frame);
-
-    Emitter.EmitFDE(*CIEStart, Frame, I == E, *SectionStart);
-  }
-}
-
-void MCDwarfFrameEmitter::EmitAdvanceLoc(MCObjectStreamer &Streamer,
-                                         uint64_t AddrDelta) {
-  MCContext &Context = Streamer.getContext();
-  SmallString<256> Tmp;
-  raw_svector_ostream OS(Tmp);
-  MCDwarfFrameEmitter::EncodeAdvanceLoc(Context, AddrDelta, OS);
-  Streamer.EmitBytes(OS.str());
-}
-
-void MCDwarfFrameEmitter::EncodeAdvanceLoc(MCContext &Context,
-                                           uint64_t AddrDelta,
-                                           raw_ostream &OS) {
-  // Scale the address delta by the minimum instruction length.
-  AddrDelta = ScaleAddrDelta(Context, AddrDelta);
-
-  support::endianness E =
-      Context.getAsmInfo()->isLittleEndian() ? support::little : support::big;
-  if (AddrDelta == 0) {
-  } else if (isUIntN(6, AddrDelta)) {
-    uint8_t Opcode = dwarf::DW_CFA_advance_loc | AddrDelta;
-    OS << Opcode;
-  } else if (isUInt<8>(AddrDelta)) {
-    OS << uint8_t(dwarf::DW_CFA_advance_loc1);
-    OS << uint8_t(AddrDelta);
-  } else if (isUInt<16>(AddrDelta)) {
-    OS << uint8_t(dwarf::DW_CFA_advance_loc2);
-    support::endian::write<uint16_t>(OS, AddrDelta, E);
-  } else {
-    assert(isUInt<32>(AddrDelta));
-    OS << uint8_t(dwarf::DW_CFA_advance_loc4);
-    support::endian::write<uint32_t>(OS, AddrDelta, E);
-  }
-}