1 files changed, 759 insertions, 0 deletions
diff --git a/third_party/llvm-project/Dwarf.cpp b/third_party/llvm-project/Dwarf.cpp
new file mode 100644
index 000000000..9ca331741
--- /dev/null
+++ b/third_party/llvm-project/Dwarf.cpp
@@ -0,0 +1,759 @@
+//===-- llvm/BinaryFormat/Dwarf.cpp - Dwarf Framework ------------*- C++-*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for generic dwarf information.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/BinaryFormat/Dwarf.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Support/ErrorHandling.h"
+
+using namespace llvm;
+using namespace dwarf;
+
+StringRef llvm::dwarf::TagString(unsigned Tag) {
+  switch (Tag) {
+  default:
+    return StringRef();
+#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR, KIND)                         \
+  case DW_TAG_##NAME:                                                          \
+    return "DW_TAG_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::getTag(StringRef TagString) {
+  return StringSwitch<unsigned>(TagString)
+#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR, KIND)                         \
+  .Case("DW_TAG_" #NAME, DW_TAG_##NAME)
+#include "llvm/BinaryFormat/Dwarf.def"
+      .Default(DW_TAG_invalid);
+}
+
+unsigned llvm::dwarf::TagVersion(dwarf::Tag Tag) {
+  switch (Tag) {
+  default:
+    return 0;
+#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR, KIND)                         \
+  case DW_TAG_##NAME:                                                          \
+    return VERSION;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::TagVendor(dwarf::Tag Tag) {
+  switch (Tag) {
+  default:
+    return 0;
+#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR, KIND)                         \
+  case DW_TAG_##NAME:                                                          \
+    return DWARF_VENDOR_##VENDOR;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::ChildrenString(unsigned Children) {
+  switch (Children) {
+  case DW_CHILDREN_no:
+    return "DW_CHILDREN_no";
+  case DW_CHILDREN_yes:
+    return "DW_CHILDREN_yes";
+  }
+  return StringRef();
+}
+
+StringRef llvm::dwarf::AttributeString(unsigned Attribute) {
+  switch (Attribute) {
+  default:
+    return StringRef();
+#define HANDLE_DW_AT(ID, NAME, VERSION, VENDOR)                                \
+  case DW_AT_##NAME:                                                           \
+    return "DW_AT_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::AttributeVersion(dwarf::Attribute Attribute) {
+  switch (Attribute) {
+  default:
+    return 0;
+#define HANDLE_DW_AT(ID, NAME, VERSION, VENDOR)                                \
+  case DW_AT_##NAME:                                                           \
+    return VERSION;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::AttributeVendor(dwarf::Attribute Attribute) {
+  switch (Attribute) {
+  default:
+    return 0;
+#define HANDLE_DW_AT(ID, NAME, VERSION, VENDOR)                                \
+  case DW_AT_##NAME:                                                           \
+    return DWARF_VENDOR_##VENDOR;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::FormEncodingString(unsigned Encoding) {
+  switch (Encoding) {
+  default:
+    return StringRef();
+#define HANDLE_DW_FORM(ID, NAME, VERSION, VENDOR)                              \
+  case DW_FORM_##NAME:                                                         \
+    return "DW_FORM_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::FormVersion(dwarf::Form Form) {
+  switch (Form) {
+  default:
+    return 0;
+#define HANDLE_DW_FORM(ID, NAME, VERSION, VENDOR)                              \
+  case DW_FORM_##NAME:                                                         \
+    return VERSION;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::FormVendor(dwarf::Form Form) {
+  switch (Form) {
+  default:
+    return 0;
+#define HANDLE_DW_FORM(ID, NAME, VERSION, VENDOR)                              \
+  case DW_FORM_##NAME:                                                         \
+    return DWARF_VENDOR_##VENDOR;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::OperationEncodingString(unsigned Encoding) {
+  switch (Encoding) {
+  default:
+    return StringRef();
+#define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR)                                \
+  case DW_OP_##NAME:                                                           \
+    return "DW_OP_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  case DW_OP_LLVM_convert:
+    return "DW_OP_LLVM_convert";
+  case DW_OP_LLVM_fragment:
+    return "DW_OP_LLVM_fragment";
+  case DW_OP_LLVM_tag_offset:
+    return "DW_OP_LLVM_tag_offset";
+  case DW_OP_LLVM_entry_value:
+    return "DW_OP_LLVM_entry_value";
+  }
+}
+
+unsigned llvm::dwarf::getOperationEncoding(StringRef OperationEncodingString) {
+  return StringSwitch<unsigned>(OperationEncodingString)
+#define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR)                                \
+  .Case("DW_OP_" #NAME, DW_OP_##NAME)
+#include "llvm/BinaryFormat/Dwarf.def"
+      .Case("DW_OP_LLVM_convert", DW_OP_LLVM_convert)
+      .Case("DW_OP_LLVM_fragment", DW_OP_LLVM_fragment)
+      .Case("DW_OP_LLVM_tag_offset", DW_OP_LLVM_tag_offset)
+      .Case("DW_OP_LLVM_entry_value", DW_OP_LLVM_entry_value)
+      .Default(0);
+}
+
+unsigned llvm::dwarf::OperationVersion(dwarf::LocationAtom Op) {
+  switch (Op) {
+  default:
+    return 0;
+#define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR)                                \
+  case DW_OP_##NAME:                                                           \
+    return VERSION;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::OperationVendor(dwarf::LocationAtom Op) {
+  switch (Op) {
+  default:
+    return 0;
+#define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR)                                \
+  case DW_OP_##NAME:                                                           \
+    return DWARF_VENDOR_##VENDOR;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::AttributeEncodingString(unsigned Encoding) {
+  switch (Encoding) {
+  default:
+    return StringRef();
+#define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR)                               \
+  case DW_ATE_##NAME:                                                          \
+    return "DW_ATE_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::getAttributeEncoding(StringRef EncodingString) {
+  return StringSwitch<unsigned>(EncodingString)
+#define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR)                               \
+  .Case("DW_ATE_" #NAME, DW_ATE_##NAME)
+#include "llvm/BinaryFormat/Dwarf.def"
+      .Default(0);
+}
+
+unsigned llvm::dwarf::AttributeEncodingVersion(dwarf::TypeKind ATE) {
+  switch (ATE) {
+  default:
+    return 0;
+#define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR)                               \
+  case DW_ATE_##NAME:                                                          \
+    return VERSION;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::AttributeEncodingVendor(dwarf::TypeKind ATE) {
+  switch (ATE) {
+  default:
+    return 0;
+#define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR)                               \
+  case DW_ATE_##NAME:                                                          \
+    return DWARF_VENDOR_##VENDOR;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::DecimalSignString(unsigned Sign) {
+  switch (Sign) {
+  case DW_DS_unsigned:
+    return "DW_DS_unsigned";
+  case DW_DS_leading_overpunch:
+    return "DW_DS_leading_overpunch";
+  case DW_DS_trailing_overpunch:
+    return "DW_DS_trailing_overpunch";
+  case DW_DS_leading_separate:
+    return "DW_DS_leading_separate";
+  case DW_DS_trailing_separate:
+    return "DW_DS_trailing_separate";
+  }
+  return StringRef();
+}
+
+StringRef llvm::dwarf::EndianityString(unsigned Endian) {
+  switch (Endian) {
+  case DW_END_default:
+    return "DW_END_default";
+  case DW_END_big:
+    return "DW_END_big";
+  case DW_END_little:
+    return "DW_END_little";
+  case DW_END_lo_user:
+    return "DW_END_lo_user";
+  case DW_END_hi_user:
+    return "DW_END_hi_user";
+  }
+  return StringRef();
+}
+
+StringRef llvm::dwarf::AccessibilityString(unsigned Access) {
+  switch (Access) {
+  // Accessibility codes
+  case DW_ACCESS_public:
+    return "DW_ACCESS_public";
+  case DW_ACCESS_protected:
+    return "DW_ACCESS_protected";
+  case DW_ACCESS_private:
+    return "DW_ACCESS_private";
+  }
+  return StringRef();
+}
+
+StringRef llvm::dwarf::DefaultedMemberString(unsigned DefaultedEncodings) {
+  switch (DefaultedEncodings) {
+  // Defaulted Member Encodings codes
+  case DW_DEFAULTED_no:
+    return "DW_DEFAULTED_no";
+  case DW_DEFAULTED_in_class:
+    return "DW_DEFAULTED_in_class";
+  case DW_DEFAULTED_out_of_class:
+    return "DW_DEFAULTED_out_of_class";
+  }
+  return StringRef();
+}
+
+StringRef llvm::dwarf::VisibilityString(unsigned Visibility) {
+  switch (Visibility) {
+  case DW_VIS_local:
+    return "DW_VIS_local";
+  case DW_VIS_exported:
+    return "DW_VIS_exported";
+  case DW_VIS_qualified:
+    return "DW_VIS_qualified";
+  }
+  return StringRef();
+}
+
+StringRef llvm::dwarf::VirtualityString(unsigned Virtuality) {
+  switch (Virtuality) {
+  default:
+    return StringRef();
+#define HANDLE_DW_VIRTUALITY(ID, NAME)                                         \
+  case DW_VIRTUALITY_##NAME:                                                   \
+    return "DW_VIRTUALITY_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::getVirtuality(StringRef VirtualityString) {
+  return StringSwitch<unsigned>(VirtualityString)
+#define HANDLE_DW_VIRTUALITY(ID, NAME)                                         \
+  .Case("DW_VIRTUALITY_" #NAME, DW_VIRTUALITY_##NAME)
+#include "llvm/BinaryFormat/Dwarf.def"
+      .Default(DW_VIRTUALITY_invalid);
+}
+
+StringRef llvm::dwarf::LanguageString(unsigned Language) {
+  switch (Language) {
+  default:
+    return StringRef();
+#define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
+  case DW_LANG_##NAME:                                                         \
+    return "DW_LANG_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::getLanguage(StringRef LanguageString) {
+  return StringSwitch<unsigned>(LanguageString)
+#define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
+  .Case("DW_LANG_" #NAME, DW_LANG_##NAME)
+#include "llvm/BinaryFormat/Dwarf.def"
+      .Default(0);
+}
+
+unsigned llvm::dwarf::LanguageVersion(dwarf::SourceLanguage Lang) {
+  switch (Lang) {
+  default:
+    return 0;
+#define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
+  case DW_LANG_##NAME:                                                         \
+    return VERSION;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::LanguageVendor(dwarf::SourceLanguage Lang) {
+  switch (Lang) {
+  default:
+    return 0;
+#define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
+  case DW_LANG_##NAME:                                                         \
+    return DWARF_VENDOR_##VENDOR;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+Optional<unsigned> llvm::dwarf::LanguageLowerBound(dwarf::SourceLanguage Lang) {
+  switch (Lang) {
+  default:
+    return None;
+#define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
+  case DW_LANG_##NAME:                                                         \
+    return LOWER_BOUND;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::CaseString(unsigned Case) {
+  switch (Case) {
+  case DW_ID_case_sensitive:
+    return "DW_ID_case_sensitive";
+  case DW_ID_up_case:
+    return "DW_ID_up_case";
+  case DW_ID_down_case:
+    return "DW_ID_down_case";
+  case DW_ID_case_insensitive:
+    return "DW_ID_case_insensitive";
+  }
+  return StringRef();
+}
+
+StringRef llvm::dwarf::ConventionString(unsigned CC) {
+  switch (CC) {
+  default:
+    return StringRef();
+#define HANDLE_DW_CC(ID, NAME)                                                 \
+  case DW_CC_##NAME:                                                           \
+    return "DW_CC_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+unsigned llvm::dwarf::getCallingConvention(StringRef CCString) {
+  return StringSwitch<unsigned>(CCString)
+#define HANDLE_DW_CC(ID, NAME) .Case("DW_CC_" #NAME, DW_CC_##NAME)
+#include "llvm/BinaryFormat/Dwarf.def"
+      .Default(0);
+}
+
+StringRef llvm::dwarf::InlineCodeString(unsigned Code) {
+  switch (Code) {
+  case DW_INL_not_inlined:
+    return "DW_INL_not_inlined";
+  case DW_INL_inlined:
+    return "DW_INL_inlined";
+  case DW_INL_declared_not_inlined:
+    return "DW_INL_declared_not_inlined";
+  case DW_INL_declared_inlined:
+    return "DW_INL_declared_inlined";
+  }
+  return StringRef();
+}
+
+StringRef llvm::dwarf::ArrayOrderString(unsigned Order) {
+  switch (Order) {
+  case DW_ORD_row_major:
+    return "DW_ORD_row_major";
+  case DW_ORD_col_major:
+    return "DW_ORD_col_major";
+  }
+  return StringRef();
+}
+
+StringRef llvm::dwarf::LNStandardString(unsigned Standard) {
+  switch (Standard) {
+  default:
+    return StringRef();
+#define HANDLE_DW_LNS(ID, NAME)                                                \
+  case DW_LNS_##NAME:                                                          \
+    return "DW_LNS_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::LNExtendedString(unsigned Encoding) {
+  switch (Encoding) {
+  default:
+    return StringRef();
+#define HANDLE_DW_LNE(ID, NAME)                                                \
+  case DW_LNE_##NAME:                                                          \
+    return "DW_LNE_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::MacinfoString(unsigned Encoding) {
+  switch (Encoding) {
+  // Macinfo Type Encodings
+  case DW_MACINFO_define:
+    return "DW_MACINFO_define";
+  case DW_MACINFO_undef:
+    return "DW_MACINFO_undef";
+  case DW_MACINFO_start_file:
+    return "DW_MACINFO_start_file";
+  case DW_MACINFO_end_file:
+    return "DW_MACINFO_end_file";
+  case DW_MACINFO_vendor_ext:
+    return "DW_MACINFO_vendor_ext";
+  case DW_MACINFO_invalid:
+    return "DW_MACINFO_invalid";
+  }
+  return StringRef();
+}
+
+unsigned llvm::dwarf::getMacinfo(StringRef MacinfoString) {
+  return StringSwitch<unsigned>(MacinfoString)
+      .Case("DW_MACINFO_define", DW_MACINFO_define)
+      .Case("DW_MACINFO_undef", DW_MACINFO_undef)
+      .Case("DW_MACINFO_start_file", DW_MACINFO_start_file)
+      .Case("DW_MACINFO_end_file", DW_MACINFO_end_file)
+      .Case("DW_MACINFO_vendor_ext", DW_MACINFO_vendor_ext)
+      .Default(DW_MACINFO_invalid);
+}
+
+StringRef llvm::dwarf::RangeListEncodingString(unsigned Encoding) {
+  switch (Encoding) {
+  default:
+    return StringRef();
+#define HANDLE_DW_RLE(ID, NAME)                                                \
+  case DW_RLE_##NAME:                                                          \
+    return "DW_RLE_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::LocListEncodingString(unsigned Encoding) {
+  switch (Encoding) {
+  default:
+    return StringRef();
+#define HANDLE_DW_LLE(ID, NAME)                                                \
+  case DW_LLE_##NAME:                                                          \
+    return "DW_LLE_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::CallFrameString(unsigned Encoding,
+    Triple::ArchType Arch) {
+  assert(Arch != llvm::Triple::ArchType::UnknownArch);
+#define SELECT_AARCH64 (Arch == llvm::Triple::aarch64_be || Arch == llvm::Triple::aarch64)
+#define SELECT_MIPS64 Arch == llvm::Triple::mips64
+#define SELECT_SPARC (Arch == llvm::Triple::sparc || Arch == llvm::Triple::sparcv9)
+#define SELECT_X86 (Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64)
+#define HANDLE_DW_CFA(ID, NAME)
+#define HANDLE_DW_CFA_PRED(ID, NAME, PRED) \
+  if (ID == Encoding && PRED) \
+    return "DW_CFA_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+
+  switch (Encoding) {
+  default:
+    return StringRef();
+#define HANDLE_DW_CFA_PRED(ID, NAME, PRED)
+#define HANDLE_DW_CFA(ID, NAME)                                                \
+  case DW_CFA_##NAME:                                                          \
+    return "DW_CFA_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+
+#undef SELECT_X86
+#undef SELECT_SPARC
+#undef SELECT_MIPS64
+#undef SELECT_AARCH64
+  }
+}
+
+StringRef llvm::dwarf::ApplePropertyString(unsigned Prop) {
+  switch (Prop) {
+  default:
+    return StringRef();
+#define HANDLE_DW_APPLE_PROPERTY(ID, NAME)                                     \
+  case DW_APPLE_PROPERTY_##NAME:                                               \
+    return "DW_APPLE_PROPERTY_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::UnitTypeString(unsigned UT) {
+  switch (UT) {
+  default:
+    return StringRef();
+#define HANDLE_DW_UT(ID, NAME)                                                 \
+  case DW_UT_##NAME:                                                           \
+    return "DW_UT_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+StringRef llvm::dwarf::AtomTypeString(unsigned AT) {
+  switch (AT) {
+  case dwarf::DW_ATOM_null:
+    return "DW_ATOM_null";
+  case dwarf::DW_ATOM_die_offset:
+    return "DW_ATOM_die_offset";
+  case DW_ATOM_cu_offset:
+    return "DW_ATOM_cu_offset";
+  case DW_ATOM_die_tag:
+    return "DW_ATOM_die_tag";
+  case DW_ATOM_type_flags:
+  case DW_ATOM_type_type_flags:
+    return "DW_ATOM_type_flags";
+  case DW_ATOM_qual_name_hash:
+    return "DW_ATOM_qual_name_hash";
+  }
+  return StringRef();
+}
+
+StringRef llvm::dwarf::GDBIndexEntryKindString(GDBIndexEntryKind Kind) {
+  switch (Kind) {
+  case GIEK_NONE:
+    return "NONE";
+  case GIEK_TYPE:
+    return "TYPE";
+  case GIEK_VARIABLE:
+    return "VARIABLE";
+  case GIEK_FUNCTION:
+    return "FUNCTION";
+  case GIEK_OTHER:
+    return "OTHER";
+  case GIEK_UNUSED5:
+    return "UNUSED5";
+  case GIEK_UNUSED6:
+    return "UNUSED6";
+  case GIEK_UNUSED7:
+    return "UNUSED7";
+  }
+  llvm_unreachable("Unknown GDBIndexEntryKind value");
+}
+
+StringRef
+llvm::dwarf::GDBIndexEntryLinkageString(GDBIndexEntryLinkage Linkage) {
+  switch (Linkage) {
+  case GIEL_EXTERNAL:
+    return "EXTERNAL";
+  case GIEL_STATIC:
+    return "STATIC";
+  }
+  llvm_unreachable("Unknown GDBIndexEntryLinkage value");
+}
+
+StringRef llvm::dwarf::AttributeValueString(uint16_t Attr, unsigned Val) {
+  switch (Attr) {
+  case DW_AT_accessibility:
+    return AccessibilityString(Val);
+  case DW_AT_virtuality:
+    return VirtualityString(Val);
+  case DW_AT_language:
+    return LanguageString(Val);
+  case DW_AT_encoding:
+    return AttributeEncodingString(Val);
+  case DW_AT_decimal_sign:
+    return DecimalSignString(Val);
+  case DW_AT_endianity:
+    return EndianityString(Val);
+  case DW_AT_visibility:
+    return VisibilityString(Val);
+  case DW_AT_identifier_case:
+    return CaseString(Val);
+  case DW_AT_calling_convention:
+    return ConventionString(Val);
+  case DW_AT_inline:
+    return InlineCodeString(Val);
+  case DW_AT_ordering:
+    return ArrayOrderString(Val);
+  case DW_AT_APPLE_runtime_class:
+    return LanguageString(Val);
+  case DW_AT_defaulted:
+    return DefaultedMemberString(Val);
+  }
+
+  return StringRef();
+}
+
+StringRef llvm::dwarf::AtomValueString(uint16_t Atom, unsigned Val) {
+  switch (Atom) {
+  case DW_ATOM_null:
+    return "NULL";
+  case DW_ATOM_die_tag:
+    return TagString(Val);
+  }
+
+  return StringRef();
+}
+
+StringRef llvm::dwarf::IndexString(unsigned Idx) {
+  switch (Idx) {
+  default:
+    return StringRef();
+#define HANDLE_DW_IDX(ID, NAME)                                                \
+  case DW_IDX_##NAME:                                                          \
+    return "DW_IDX_" #NAME;
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+Optional<uint8_t> llvm::dwarf::getFixedFormByteSize(dwarf::Form Form,
+                                                    FormParams Params) {
+  switch (Form) {
+  case DW_FORM_addr:
+    if (Params)
+      return Params.AddrSize;
+    return None;
+
+  case DW_FORM_block:          // ULEB128 length L followed by L bytes.
+  case DW_FORM_block1:         // 1 byte length L followed by L bytes.
+  case DW_FORM_block2:         // 2 byte length L followed by L bytes.
+  case DW_FORM_block4:         // 4 byte length L followed by L bytes.
+  case DW_FORM_string:         // C-string with null terminator.
+  case DW_FORM_sdata:          // SLEB128.
+  case DW_FORM_udata:          // ULEB128.
+  case DW_FORM_ref_udata:      // ULEB128.
+  case DW_FORM_indirect:       // ULEB128.
+  case DW_FORM_exprloc:        // ULEB128 length L followed by L bytes.
+  case DW_FORM_strx:           // ULEB128.
+  case DW_FORM_addrx:          // ULEB128.
+  case DW_FORM_loclistx:       // ULEB128.
+  case DW_FORM_rnglistx:       // ULEB128.
+  case DW_FORM_GNU_addr_index: // ULEB128.
+  case DW_FORM_GNU_str_index:  // ULEB128.
+    return None;
+
+  case DW_FORM_ref_addr:
+    if (Params)
+      return Params.getRefAddrByteSize();
+    return None;
+
+  case DW_FORM_flag:
+  case DW_FORM_data1:
+  case DW_FORM_ref1:
+  case DW_FORM_strx1:
+  case DW_FORM_addrx1:
+    return 1;
+
+  case DW_FORM_data2:
+  case DW_FORM_ref2:
+  case DW_FORM_strx2:
+  case DW_FORM_addrx2:
+    return 2;
+
+  case DW_FORM_strx3:
+    return 3;
+
+  case DW_FORM_data4:
+  case DW_FORM_ref4:
+  case DW_FORM_ref_sup4:
+  case DW_FORM_strx4:
+  case DW_FORM_addrx4:
+    return 4;
+
+  case DW_FORM_strp:
+  case DW_FORM_GNU_ref_alt:
+  case DW_FORM_GNU_strp_alt:
+  case DW_FORM_line_strp:
+  case DW_FORM_sec_offset:
+  case DW_FORM_strp_sup:
+    if (Params)
+      return Params.getDwarfOffsetByteSize();
+    return None;
+
+  case DW_FORM_data8:
+  case DW_FORM_ref8:
+  case DW_FORM_ref_sig8:
+  case DW_FORM_ref_sup8:
+    return 8;
+
+  case DW_FORM_flag_present:
+    return 0;
+
+  case DW_FORM_data16:
+    return 16;
+
+  case DW_FORM_implicit_const:
+    // The implicit value is stored in the abbreviation as a SLEB128, and
+    // there no data in debug info.
+    return 0;
+
+  default:
+    break;
+  }
+  return None;
+}
+
+bool llvm::dwarf::isValidFormForVersion(Form F, unsigned Version,
+                                        bool ExtensionsOk) {
+  if (FormVendor(F) == DWARF_VENDOR_DWARF) {
+    unsigned FV = FormVersion(F);
+    return FV > 0 && FV <= Version;
+  }
+  return ExtensionsOk;
+}
+
+constexpr char llvm::dwarf::EnumTraits<Attribute>::Type[];
+constexpr char llvm::dwarf::EnumTraits<Form>::Type[];
+constexpr char llvm::dwarf::EnumTraits<Index>::Type[];
+constexpr char llvm::dwarf::EnumTraits<Tag>::Type[];