text: //===-- llvm/Support/Dwarf.h ---Dwarf Constants------------------*- C++ -*-===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is distributed under the University of Illinois Open Source
  // License. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  //
  // This file contains constants used for implementing Dwarf debug support.  For
  // Details on the Dwarf 3 specfication see DWARF Debugging Information Format
  // V.3 reference manual http://dwarf.freestandards.org ,
  //
  //===----------------------------------------------------------------------===//
  
  #ifndef LLVM_SUPPORT_DWARF_H
  #define LLVM_SUPPORT_DWARF_H
  
  #include "llvm/Support/Compiler.h"
  #include "llvm/Support/DataTypes.h"
  
  namespace llvm {
  
  //===----------------------------------------------------------------------===//
  // Debug info constants.
  
  enum : uint32_t {
    LLVMDebugVersion = (12 << 16),    // Current version of debug information.
    LLVMDebugVersion11 = (11 << 16),  // Constant for version 11.
    LLVMDebugVersion10 = (10 << 16),  // Constant for version 10.
    LLVMDebugVersion9 = (9 << 16),    // Constant for version 9.
    LLVMDebugVersion8 = (8 << 16),    // Constant for version 8.
    LLVMDebugVersion7 = (7 << 16),    // Constant for version 7.
    LLVMDebugVersion6 = (6 << 16),    // Constant for version 6.
    LLVMDebugVersion5 = (5 << 16),    // Constant for version 5.
    LLVMDebugVersion4 = (4 << 16),    // Constant for version 4.
    LLVMDebugVersionMask = 0xffff0000 // Mask for version number.
  };
  
  namespace dwarf {
  
  //===----------------------------------------------------------------------===//
  // Dwarf constants as gleaned from the DWARF Debugging Information Format V.4
  // reference manual http://www.dwarfstd.org/.
  //
  
  // Do not mix the following two enumerations sets.  DW_TAG_invalid changes the
  // enumeration base type.
  
  enum LLVMConstants : uint32_t {
    // llvm mock tags
    DW_TAG_invalid = ~0U, // Tag for invalid results.
  
    DW_TAG_auto_variable = 0x100, // Tag for local (auto) variables.
    DW_TAG_arg_variable = 0x101,  // Tag for argument variables.
  
    DW_TAG_user_base = 0x1000, // Recommended base for user tags.
  
    DWARF_VERSION = 4,       // Default dwarf version we output.
    DW_PUBTYPES_VERSION = 2, // Section version number for .debug_pubtypes.
    DW_PUBNAMES_VERSION = 2, // Section version number for .debug_pubnames.
    DW_ARANGES_VERSION = 2   // Section version number for .debug_aranges.
  };
  
  // Special ID values that distinguish a CIE from a FDE in DWARF CFI.
  // Not inside an enum because a 64-bit value is needed.
  const uint32_t DW_CIE_ID = UINT32_MAX;
  const uint64_t DW64_CIE_ID = UINT64_MAX;
  
  enum Tag : uint16_t {
    DW_TAG_array_type = 0x01,
    DW_TAG_class_type = 0x02,
    DW_TAG_entry_point = 0x03,
    DW_TAG_enumeration_type = 0x04,
    DW_TAG_formal_parameter = 0x05,
    DW_TAG_imported_declaration = 0x08,
    DW_TAG_label = 0x0a,
    DW_TAG_lexical_block = 0x0b,
    DW_TAG_member = 0x0d,
    DW_TAG_pointer_type = 0x0f,
    DW_TAG_reference_type = 0x10,
    DW_TAG_compile_unit = 0x11,
    DW_TAG_string_type = 0x12,
    DW_TAG_structure_type = 0x13,
    DW_TAG_subroutine_type = 0x15,
    DW_TAG_typedef = 0x16,
    DW_TAG_union_type = 0x17,
    DW_TAG_unspecified_parameters = 0x18,
    DW_TAG_variant = 0x19,
    DW_TAG_common_block = 0x1a,
    DW_TAG_common_inclusion = 0x1b,
    DW_TAG_inheritance = 0x1c,
    DW_TAG_inlined_subroutine = 0x1d,
    DW_TAG_module = 0x1e,
    DW_TAG_ptr_to_member_type = 0x1f,
    DW_TAG_set_type = 0x20,
    DW_TAG_subrange_type = 0x21,
    DW_TAG_with_stmt = 0x22,
    DW_TAG_access_declaration = 0x23,
    DW_TAG_base_type = 0x24,
    DW_TAG_catch_block = 0x25,
    DW_TAG_const_type = 0x26,
    DW_TAG_constant = 0x27,
    DW_TAG_enumerator = 0x28,
    DW_TAG_file_type = 0x29,
    DW_TAG_friend = 0x2a,
    DW_TAG_namelist = 0x2b,
    DW_TAG_namelist_item = 0x2c,
    DW_TAG_packed_type = 0x2d,
    DW_TAG_subprogram = 0x2e,
    DW_TAG_template_type_parameter = 0x2f,
    DW_TAG_template_value_parameter = 0x30,
    DW_TAG_thrown_type = 0x31,
    DW_TAG_try_block = 0x32,
    DW_TAG_variant_part = 0x33,
    DW_TAG_variable = 0x34,
    DW_TAG_volatile_type = 0x35,
    DW_TAG_dwarf_procedure = 0x36,
    DW_TAG_restrict_type = 0x37,
    DW_TAG_interface_type = 0x38,
    DW_TAG_namespace = 0x39,
    DW_TAG_imported_module = 0x3a,
    DW_TAG_unspecified_type = 0x3b,
    DW_TAG_partial_unit = 0x3c,
    DW_TAG_imported_unit = 0x3d,
    DW_TAG_condition = 0x3f,
    DW_TAG_shared_type = 0x40,
    DW_TAG_type_unit = 0x41,
    DW_TAG_rvalue_reference_type = 0x42,
    DW_TAG_template_alias = 0x43,
  
    // New in DWARF 5:
    DW_TAG_coarray_type = 0x44,
    DW_TAG_generic_subrange = 0x45,
    DW_TAG_dynamic_type = 0x46,
  
    DW_TAG_MIPS_loop = 0x4081,
    DW_TAG_format_label = 0x4101,
    DW_TAG_function_template = 0x4102,
    DW_TAG_class_template = 0x4103,
    DW_TAG_GNU_template_template_param = 0x4106,
    DW_TAG_GNU_template_parameter_pack = 0x4107,
    DW_TAG_GNU_formal_parameter_pack = 0x4108,
    DW_TAG_lo_user = 0x4080,
    DW_TAG_APPLE_property = 0x4200,
    DW_TAG_hi_user = 0xffff
  };
  
  inline bool isType(Tag T) {
    switch (T) {
    case DW_TAG_array_type:
    case DW_TAG_class_type:
    case DW_TAG_interface_type:
    case DW_TAG_enumeration_type:
    case DW_TAG_pointer_type:
    case DW_TAG_reference_type:
    case DW_TAG_rvalue_reference_type:
    case DW_TAG_string_type:
    case DW_TAG_structure_type:
    case DW_TAG_subroutine_type:
    case DW_TAG_union_type:
    case DW_TAG_ptr_to_member_type:
    case DW_TAG_set_type:
    case DW_TAG_subrange_type:
    case DW_TAG_base_type:
    case DW_TAG_const_type:
    case DW_TAG_file_type:
    case DW_TAG_packed_type:
    case DW_TAG_volatile_type:
    case DW_TAG_typedef:
      return true;
    default:
      return false;
    }
  }
  
  enum Attribute : uint16_t {
    // Attributes
    DW_AT_sibling = 0x01,
    DW_AT_location = 0x02,
    DW_AT_name = 0x03,
    DW_AT_ordering = 0x09,
    DW_AT_byte_size = 0x0b,
    DW_AT_bit_offset = 0x0c,
    DW_AT_bit_size = 0x0d,
    DW_AT_stmt_list = 0x10,
    DW_AT_low_pc = 0x11,
    DW_AT_high_pc = 0x12,
    DW_AT_language = 0x13,
    DW_AT_discr = 0x15,
    DW_AT_discr_value = 0x16,
    DW_AT_visibility = 0x17,
    DW_AT_import = 0x18,
    DW_AT_string_length = 0x19,
    DW_AT_common_reference = 0x1a,
    DW_AT_comp_dir = 0x1b,
    DW_AT_const_value = 0x1c,
    DW_AT_containing_type = 0x1d,
    DW_AT_default_value = 0x1e,
    DW_AT_inline = 0x20,
    DW_AT_is_optional = 0x21,
    DW_AT_lower_bound = 0x22,
    DW_AT_producer = 0x25,
    DW_AT_prototyped = 0x27,
    DW_AT_return_addr = 0x2a,
    DW_AT_start_scope = 0x2c,
    DW_AT_bit_stride = 0x2e,
    DW_AT_upper_bound = 0x2f,
    DW_AT_abstract_origin = 0x31,
    DW_AT_accessibility = 0x32,
    DW_AT_address_class = 0x33,
    DW_AT_artificial = 0x34,
    DW_AT_base_types = 0x35,
    DW_AT_calling_convention = 0x36,
    DW_AT_count = 0x37,
    DW_AT_data_member_location = 0x38,
    DW_AT_decl_column = 0x39,
    DW_AT_decl_file = 0x3a,
    DW_AT_decl_line = 0x3b,
    DW_AT_declaration = 0x3c,
    DW_AT_discr_list = 0x3d,
    DW_AT_encoding = 0x3e,
    DW_AT_external = 0x3f,
    DW_AT_frame_base = 0x40,
    DW_AT_friend = 0x41,
    DW_AT_identifier_case = 0x42,
    DW_AT_macro_info = 0x43,
    DW_AT_namelist_item = 0x44,
    DW_AT_priority = 0x45,
    DW_AT_segment = 0x46,
    DW_AT_specification = 0x47,
    DW_AT_static_link = 0x48,
    DW_AT_type = 0x49,
    DW_AT_use_location = 0x4a,
    DW_AT_variable_parameter = 0x4b,
    DW_AT_virtuality = 0x4c,
    DW_AT_vtable_elem_location = 0x4d,
    DW_AT_allocated = 0x4e,
    DW_AT_associated = 0x4f,
    DW_AT_data_location = 0x50,
    DW_AT_byte_stride = 0x51,
    DW_AT_entry_pc = 0x52,
    DW_AT_use_UTF8 = 0x53,
    DW_AT_extension = 0x54,
    DW_AT_ranges = 0x55,
    DW_AT_trampoline = 0x56,
    DW_AT_call_column = 0x57,
    DW_AT_call_file = 0x58,
    DW_AT_call_line = 0x59,
    DW_AT_description = 0x5a,
    DW_AT_binary_scale = 0x5b,
    DW_AT_decimal_scale = 0x5c,
    DW_AT_small = 0x5d,
    DW_AT_decimal_sign = 0x5e,
    DW_AT_digit_count = 0x5f,
    DW_AT_picture_string = 0x60,
    DW_AT_mutable = 0x61,
    DW_AT_threads_scaled = 0x62,
    DW_AT_explicit = 0x63,
    DW_AT_object_pointer = 0x64,
    DW_AT_endianity = 0x65,
    DW_AT_elemental = 0x66,
    DW_AT_pure = 0x67,
    DW_AT_recursive = 0x68,
    DW_AT_signature = 0x69,
    DW_AT_main_subprogram = 0x6a,
    DW_AT_data_bit_offset = 0x6b,
    DW_AT_const_expr = 0x6c,
    DW_AT_enum_class = 0x6d,
    DW_AT_linkage_name = 0x6e,
  
    // New in DWARF 5:
    DW_AT_string_length_bit_size = 0x6f,
    DW_AT_string_length_byte_size = 0x70,
    DW_AT_rank = 0x71,
    DW_AT_str_offsets_base = 0x72,
    DW_AT_addr_base = 0x73,
    DW_AT_ranges_base = 0x74,
    DW_AT_dwo_id = 0x75,
    DW_AT_dwo_name = 0x76,
    DW_AT_reference = 0x77,
    DW_AT_rvalue_reference = 0x78,
  
    DW_AT_lo_user = 0x2000,
    DW_AT_hi_user = 0x3fff,
  
    DW_AT_MIPS_loop_begin = 0x2002,
    DW_AT_MIPS_tail_loop_begin = 0x2003,
    DW_AT_MIPS_epilog_begin = 0x2004,
    DW_AT_MIPS_loop_unroll_factor = 0x2005,
    DW_AT_MIPS_software_pipeline_depth = 0x2006,
    DW_AT_MIPS_linkage_name = 0x2007,
    DW_AT_MIPS_stride = 0x2008,
    DW_AT_MIPS_abstract_name = 0x2009,
    DW_AT_MIPS_clone_origin = 0x200a,
    DW_AT_MIPS_has_inlines = 0x200b,
    DW_AT_MIPS_stride_byte = 0x200c,
    DW_AT_MIPS_stride_elem = 0x200d,
    DW_AT_MIPS_ptr_dopetype = 0x200e,
    DW_AT_MIPS_allocatable_dopetype = 0x200f,
    DW_AT_MIPS_assumed_shape_dopetype = 0x2010,
  
    // This one appears to have only been implemented by Open64 for
    // fortran and may conflict with other extensions.
    DW_AT_MIPS_assumed_size = 0x2011,
  
    // GNU extensions
    DW_AT_sf_names = 0x2101,
    DW_AT_src_info = 0x2102,
    DW_AT_mac_info = 0x2103,
    DW_AT_src_coords = 0x2104,
    DW_AT_body_begin = 0x2105,
    DW_AT_body_end = 0x2106,
    DW_AT_GNU_vector = 0x2107,
    DW_AT_GNU_template_name = 0x2110,
  
    DW_AT_GNU_odr_signature = 0x210f,
  
    // Extensions for Fission proposal.
    DW_AT_GNU_dwo_name = 0x2130,
    DW_AT_GNU_dwo_id = 0x2131,
    DW_AT_GNU_ranges_base = 0x2132,
    DW_AT_GNU_addr_base = 0x2133,
    DW_AT_GNU_pubnames = 0x2134,
    DW_AT_GNU_pubtypes = 0x2135,
  
    // Apple extensions.
    DW_AT_APPLE_optimized = 0x3fe1,
    DW_AT_APPLE_flags = 0x3fe2,
    DW_AT_APPLE_isa = 0x3fe3,
    DW_AT_APPLE_block = 0x3fe4,
    DW_AT_APPLE_major_runtime_vers = 0x3fe5,
    DW_AT_APPLE_runtime_class = 0x3fe6,
    DW_AT_APPLE_omit_frame_ptr = 0x3fe7,
    DW_AT_APPLE_property_name = 0x3fe8,
    DW_AT_APPLE_property_getter = 0x3fe9,
    DW_AT_APPLE_property_setter = 0x3fea,
    DW_AT_APPLE_property_attribute = 0x3feb,
    DW_AT_APPLE_objc_complete_type = 0x3fec,
    DW_AT_APPLE_property = 0x3fed
  };
  
  enum Form : uint16_t {
    // Attribute form encodings
    DW_FORM_addr = 0x01,
    DW_FORM_block2 = 0x03,
    DW_FORM_block4 = 0x04,
    DW_FORM_data2 = 0x05,
    DW_FORM_data4 = 0x06,
    DW_FORM_data8 = 0x07,
    DW_FORM_string = 0x08,
    DW_FORM_block = 0x09,
    DW_FORM_block1 = 0x0a,
    DW_FORM_data1 = 0x0b,
    DW_FORM_flag = 0x0c,
    DW_FORM_sdata = 0x0d,
    DW_FORM_strp = 0x0e,
    DW_FORM_udata = 0x0f,
    DW_FORM_ref_addr = 0x10,
    DW_FORM_ref1 = 0x11,
    DW_FORM_ref2 = 0x12,
    DW_FORM_ref4 = 0x13,
    DW_FORM_ref8 = 0x14,
    DW_FORM_ref_udata = 0x15,
    DW_FORM_indirect = 0x16,
    DW_FORM_sec_offset = 0x17,
    DW_FORM_exprloc = 0x18,
    DW_FORM_flag_present = 0x19,
    DW_FORM_ref_sig8 = 0x20,
  
    // Extensions for Fission proposal
    DW_FORM_GNU_addr_index = 0x1f01,
    DW_FORM_GNU_str_index = 0x1f02
  };
  
  enum LocationAtom {
    // Operation encodings
    DW_OP_addr = 0x03,
    DW_OP_deref = 0x06,
    DW_OP_const1u = 0x08,
    DW_OP_const1s = 0x09,
    DW_OP_const2u = 0x0a,
    DW_OP_const2s = 0x0b,
    DW_OP_const4u = 0x0c,
    DW_OP_const4s = 0x0d,
    DW_OP_const8u = 0x0e,
    DW_OP_const8s = 0x0f,
    DW_OP_constu = 0x10,
    DW_OP_consts = 0x11,
    DW_OP_dup = 0x12,
    DW_OP_drop = 0x13,
    DW_OP_over = 0x14,
    DW_OP_pick = 0x15,
    DW_OP_swap = 0x16,
    DW_OP_rot = 0x17,
    DW_OP_xderef = 0x18,
    DW_OP_abs = 0x19,
    DW_OP_and = 0x1a,
    DW_OP_div = 0x1b,
    DW_OP_minus = 0x1c,
    DW_OP_mod = 0x1d,
    DW_OP_mul = 0x1e,
    DW_OP_neg = 0x1f,
    DW_OP_not = 0x20,
    DW_OP_or = 0x21,
    DW_OP_plus = 0x22,
    DW_OP_plus_uconst = 0x23,
    DW_OP_shl = 0x24,
    DW_OP_shr = 0x25,
    DW_OP_shra = 0x26,
    DW_OP_xor = 0x27,
    DW_OP_skip = 0x2f,
    DW_OP_bra = 0x28,
    DW_OP_eq = 0x29,
    DW_OP_ge = 0x2a,
    DW_OP_gt = 0x2b,
    DW_OP_le = 0x2c,
    DW_OP_lt = 0x2d,
    DW_OP_ne = 0x2e,
    DW_OP_lit0 = 0x30,
    DW_OP_lit1 = 0x31,
    DW_OP_lit2 = 0x32,
    DW_OP_lit3 = 0x33,
    DW_OP_lit4 = 0x34,
    DW_OP_lit5 = 0x35,
    DW_OP_lit6 = 0x36,
    DW_OP_lit7 = 0x37,
    DW_OP_lit8 = 0x38,
    DW_OP_lit9 = 0x39,
    DW_OP_lit10 = 0x3a,
    DW_OP_lit11 = 0x3b,
    DW_OP_lit12 = 0x3c,
    DW_OP_lit13 = 0x3d,
    DW_OP_lit14 = 0x3e,
    DW_OP_lit15 = 0x3f,
    DW_OP_lit16 = 0x40,
    DW_OP_lit17 = 0x41,
    DW_OP_lit18 = 0x42,
    DW_OP_lit19 = 0x43,
    DW_OP_lit20 = 0x44,
    DW_OP_lit21 = 0x45,
    DW_OP_lit22 = 0x46,
    DW_OP_lit23 = 0x47,
    DW_OP_lit24 = 0x48,
    DW_OP_lit25 = 0x49,
    DW_OP_lit26 = 0x4a,
    DW_OP_lit27 = 0x4b,
    DW_OP_lit28 = 0x4c,
    DW_OP_lit29 = 0x4d,
    DW_OP_lit30 = 0x4e,
    DW_OP_lit31 = 0x4f,
    DW_OP_reg0 = 0x50,
    DW_OP_reg1 = 0x51,
    DW_OP_reg2 = 0x52,
    DW_OP_reg3 = 0x53,
    DW_OP_reg4 = 0x54,
    DW_OP_reg5 = 0x55,
    DW_OP_reg6 = 0x56,
    DW_OP_reg7 = 0x57,
    DW_OP_reg8 = 0x58,
    DW_OP_reg9 = 0x59,
    DW_OP_reg10 = 0x5a,
    DW_OP_reg11 = 0x5b,
    DW_OP_reg12 = 0x5c,
    DW_OP_reg13 = 0x5d,
    DW_OP_reg14 = 0x5e,
    DW_OP_reg15 = 0x5f,
    DW_OP_reg16 = 0x60,
    DW_OP_reg17 = 0x61,
    DW_OP_reg18 = 0x62,
    DW_OP_reg19 = 0x63,
    DW_OP_reg20 = 0x64,
    DW_OP_reg21 = 0x65,
    DW_OP_reg22 = 0x66,
    DW_OP_reg23 = 0x67,
    DW_OP_reg24 = 0x68,
    DW_OP_reg25 = 0x69,
    DW_OP_reg26 = 0x6a,
    DW_OP_reg27 = 0x6b,
    DW_OP_reg28 = 0x6c,
    DW_OP_reg29 = 0x6d,
    DW_OP_reg30 = 0x6e,
    DW_OP_reg31 = 0x6f,
    DW_OP_breg0 = 0x70,
    DW_OP_breg1 = 0x71,
    DW_OP_breg2 = 0x72,
    DW_OP_breg3 = 0x73,
    DW_OP_breg4 = 0x74,
    DW_OP_breg5 = 0x75,
    DW_OP_breg6 = 0x76,
    DW_OP_breg7 = 0x77,
    DW_OP_breg8 = 0x78,
    DW_OP_breg9 = 0x79,
    DW_OP_breg10 = 0x7a,
    DW_OP_breg11 = 0x7b,
    DW_OP_breg12 = 0x7c,
    DW_OP_breg13 = 0x7d,
    DW_OP_breg14 = 0x7e,
    DW_OP_breg15 = 0x7f,
    DW_OP_breg16 = 0x80,
    DW_OP_breg17 = 0x81,
    DW_OP_breg18 = 0x82,
    DW_OP_breg19 = 0x83,
    DW_OP_breg20 = 0x84,
    DW_OP_breg21 = 0x85,
    DW_OP_breg22 = 0x86,
    DW_OP_breg23 = 0x87,
    DW_OP_breg24 = 0x88,
    DW_OP_breg25 = 0x89,
    DW_OP_breg26 = 0x8a,
    DW_OP_breg27 = 0x8b,
    DW_OP_breg28 = 0x8c,
    DW_OP_breg29 = 0x8d,
    DW_OP_breg30 = 0x8e,
    DW_OP_breg31 = 0x8f,
    DW_OP_regx = 0x90,
    DW_OP_fbreg = 0x91,
    DW_OP_bregx = 0x92,
    DW_OP_piece = 0x93,
    DW_OP_deref_size = 0x94,
    DW_OP_xderef_size = 0x95,
    DW_OP_nop = 0x96,
    DW_OP_push_object_address = 0x97,
    DW_OP_call2 = 0x98,
    DW_OP_call4 = 0x99,
    DW_OP_call_ref = 0x9a,
    DW_OP_form_tls_address = 0x9b,
    DW_OP_call_frame_cfa = 0x9c,
    DW_OP_bit_piece = 0x9d,
    DW_OP_implicit_value = 0x9e,
    DW_OP_stack_value = 0x9f,
    DW_OP_lo_user = 0xe0,
    DW_OP_hi_user = 0xff,
  
    // Extensions for GNU-style thread-local storage.
    DW_OP_GNU_push_tls_address = 0xe0,
  
    // Extensions for Fission proposal.
    DW_OP_GNU_addr_index = 0xfb,
    DW_OP_GNU_const_index = 0xfc
  };
  
  enum TypeKind {
    // Encoding attribute values
    DW_ATE_address = 0x01,
    DW_ATE_boolean = 0x02,
    DW_ATE_complex_float = 0x03,
    DW_ATE_float = 0x04,
    DW_ATE_signed = 0x05,
    DW_ATE_signed_char = 0x06,
    DW_ATE_unsigned = 0x07,
    DW_ATE_unsigned_char = 0x08,
    DW_ATE_imaginary_float = 0x09,
    DW_ATE_packed_decimal = 0x0a,
    DW_ATE_numeric_string = 0x0b,
    DW_ATE_edited = 0x0c,
    DW_ATE_signed_fixed = 0x0d,
    DW_ATE_unsigned_fixed = 0x0e,
    DW_ATE_decimal_float = 0x0f,
    DW_ATE_UTF = 0x10,
    DW_ATE_lo_user = 0x80,
    DW_ATE_hi_user = 0xff
  };
  
  enum DecimalSignEncoding {
    // Decimal sign attribute values
    DW_DS_unsigned = 0x01,
    DW_DS_leading_overpunch = 0x02,
    DW_DS_trailing_overpunch = 0x03,
    DW_DS_leading_separate = 0x04,
    DW_DS_trailing_separate = 0x05
  };
  
  enum EndianityEncoding {
    // Endianity attribute values
    DW_END_default = 0x00,
    DW_END_big = 0x01,
    DW_END_little = 0x02,
    DW_END_lo_user = 0x40,
    DW_END_hi_user = 0xff
  };
  
  enum AccessAttribute {
    // Accessibility codes
    DW_ACCESS_public = 0x01,
    DW_ACCESS_protected = 0x02,
    DW_ACCESS_private = 0x03
  };
  
  enum VisibilityAttribute {
    // Visibility codes
    DW_VIS_local = 0x01,
    DW_VIS_exported = 0x02,
    DW_VIS_qualified = 0x03
  };
  
  enum VirtualityAttribute {
    // Virtuality codes
    DW_VIRTUALITY_none = 0x00,
    DW_VIRTUALITY_virtual = 0x01,
    DW_VIRTUALITY_pure_virtual = 0x02
  };
  
  enum SourceLanguage {
    // Language names
    DW_LANG_C89 = 0x0001,
    DW_LANG_C = 0x0002,
    DW_LANG_Ada83 = 0x0003,
    DW_LANG_C_plus_plus = 0x0004,
    DW_LANG_Cobol74 = 0x0005,
    DW_LANG_Cobol85 = 0x0006,
    DW_LANG_Fortran77 = 0x0007,
    DW_LANG_Fortran90 = 0x0008,
    DW_LANG_Pascal83 = 0x0009,
    DW_LANG_Modula2 = 0x000a,
    DW_LANG_Java = 0x000b,
    DW_LANG_C99 = 0x000c,
    DW_LANG_Ada95 = 0x000d,
    DW_LANG_Fortran95 = 0x000e,
    DW_LANG_PLI = 0x000f,
    DW_LANG_ObjC = 0x0010,
    DW_LANG_ObjC_plus_plus = 0x0011,
    DW_LANG_UPC = 0x0012,
    DW_LANG_D = 0x0013,
    // New in DWARF 5:
    DW_LANG_Python = 0x0014,
    DW_LANG_OpenCL = 0x0015,
    DW_LANG_Go = 0x0016,
    DW_LANG_Modula3 = 0x0017,
    DW_LANG_Haskell = 0x0018,
    DW_LANG_C_plus_plus_03 = 0x0019,
    DW_LANG_C_plus_plus_11 = 0x001a,
    DW_LANG_OCaml = 0x001b,
  
    DW_LANG_lo_user = 0x8000,
    DW_LANG_Mips_Assembler = 0x8001,
    DW_LANG_hi_user = 0xffff
  };
  
  enum CaseSensitivity {
    // Identifier case codes
    DW_ID_case_sensitive = 0x00,
    DW_ID_up_case = 0x01,
    DW_ID_down_case = 0x02,
    DW_ID_case_insensitive = 0x03
  };
  
  enum CallingConvention {
    // Calling convention codes
    DW_CC_normal = 0x01,
    DW_CC_program = 0x02,
    DW_CC_nocall = 0x03,
    DW_CC_lo_user = 0x40,
    DW_CC_hi_user = 0xff
  };
  
  enum InlineAttribute {
    // Inline codes
    DW_INL_not_inlined = 0x00,
    DW_INL_inlined = 0x01,
    DW_INL_declared_not_inlined = 0x02,
    DW_INL_declared_inlined = 0x03
  };
  
  enum ArrayDimensionOrdering {
    // Array ordering
    DW_ORD_row_major = 0x00,
    DW_ORD_col_major = 0x01
  };
  
  enum DiscriminantList {
    // Discriminant descriptor values
    DW_DSC_label = 0x00,
    DW_DSC_range = 0x01
  };
  
  enum LineNumberOps {
    // Line Number Standard Opcode Encodings
    DW_LNS_extended_op = 0x00,
    DW_LNS_copy = 0x01,
    DW_LNS_advance_pc = 0x02,
    DW_LNS_advance_line = 0x03,
    DW_LNS_set_file = 0x04,
    DW_LNS_set_column = 0x05,
    DW_LNS_negate_stmt = 0x06,
    DW_LNS_set_basic_block = 0x07,
    DW_LNS_const_add_pc = 0x08,
    DW_LNS_fixed_advance_pc = 0x09,
    DW_LNS_set_prologue_end = 0x0a,
    DW_LNS_set_epilogue_begin = 0x0b,
    DW_LNS_set_isa = 0x0c
  };
  
  enum LineNumberExtendedOps {
    // Line Number Extended Opcode Encodings
    DW_LNE_end_sequence = 0x01,
    DW_LNE_set_address = 0x02,
    DW_LNE_define_file = 0x03,
    DW_LNE_set_discriminator = 0x04,
    DW_LNE_lo_user = 0x80,
    DW_LNE_hi_user = 0xff
  };
  
  enum MacinfoRecordType {
    // Macinfo Type Encodings
    DW_MACINFO_define = 0x01,
    DW_MACINFO_undef = 0x02,
    DW_MACINFO_start_file = 0x03,
    DW_MACINFO_end_file = 0x04,
    DW_MACINFO_vendor_ext = 0xff
  };
  
  enum CallFrameInfo {
    // Call frame instruction encodings
    DW_CFA_extended = 0x00,
    DW_CFA_nop = 0x00,
    DW_CFA_advance_loc = 0x40,
    DW_CFA_offset = 0x80,
    DW_CFA_restore = 0xc0,
    DW_CFA_set_loc = 0x01,
    DW_CFA_advance_loc1 = 0x02,
    DW_CFA_advance_loc2 = 0x03,
    DW_CFA_advance_loc4 = 0x04,
    DW_CFA_offset_extended = 0x05,
    DW_CFA_restore_extended = 0x06,
    DW_CFA_undefined = 0x07,
    DW_CFA_same_value = 0x08,
    DW_CFA_register = 0x09,
    DW_CFA_remember_state = 0x0a,
    DW_CFA_restore_state = 0x0b,
    DW_CFA_def_cfa = 0x0c,
    DW_CFA_def_cfa_register = 0x0d,
    DW_CFA_def_cfa_offset = 0x0e,
    DW_CFA_def_cfa_expression = 0x0f,
    DW_CFA_expression = 0x10,
    DW_CFA_offset_extended_sf = 0x11,
    DW_CFA_def_cfa_sf = 0x12,
    DW_CFA_def_cfa_offset_sf = 0x13,
    DW_CFA_val_offset = 0x14,
    DW_CFA_val_offset_sf = 0x15,
    DW_CFA_val_expression = 0x16,
    DW_CFA_MIPS_advance_loc8 = 0x1d,
    DW_CFA_GNU_window_save = 0x2d,
    DW_CFA_GNU_args_size = 0x2e,
    DW_CFA_lo_user = 0x1c,
    DW_CFA_hi_user = 0x3f
  };
  
  enum Constants {
    // Children flag
    DW_CHILDREN_no = 0x00,
    DW_CHILDREN_yes = 0x01,
  
    DW_EH_PE_absptr = 0x00,
    DW_EH_PE_omit = 0xff,
    DW_EH_PE_uleb128 = 0x01,
    DW_EH_PE_udata2 = 0x02,
    DW_EH_PE_udata4 = 0x03,
    DW_EH_PE_udata8 = 0x04,
    DW_EH_PE_sleb128 = 0x09,
    DW_EH_PE_sdata2 = 0x0A,
    DW_EH_PE_sdata4 = 0x0B,
    DW_EH_PE_sdata8 = 0x0C,
    DW_EH_PE_signed = 0x08,
    DW_EH_PE_pcrel = 0x10,
    DW_EH_PE_textrel = 0x20,
    DW_EH_PE_datarel = 0x30,
    DW_EH_PE_funcrel = 0x40,
    DW_EH_PE_aligned = 0x50,
    DW_EH_PE_indirect = 0x80
  };
  
  // Constants for debug_loc.dwo in the DWARF5 Split Debug Info Proposal
  enum LocationListEntry : unsigned char {
    DW_LLE_end_of_list_entry,
    DW_LLE_base_address_selection_entry,
    DW_LLE_start_end_entry,
    DW_LLE_start_length_entry,
    DW_LLE_offset_pair_entry
  };
  
  enum ApplePropertyAttributes {
    // Apple Objective-C Property Attributes
    DW_APPLE_PROPERTY_readonly = 0x01,
    DW_APPLE_PROPERTY_readwrite = 0x02,
    DW_APPLE_PROPERTY_assign = 0x04,
    DW_APPLE_PROPERTY_retain = 0x08,
    DW_APPLE_PROPERTY_copy = 0x10,
    DW_APPLE_PROPERTY_nonatomic = 0x20
  };
  
  /// TagString - Return the string for the specified tag.
  ///
  const char *TagString(unsigned Tag);
  
  /// ChildrenString - Return the string for the specified children flag.
  ///
  const char *ChildrenString(unsigned Children);
  
  /// AttributeString - Return the string for the specified attribute.
  ///
  const char *AttributeString(unsigned Attribute);
  
  /// FormEncodingString - Return the string for the specified form encoding.
  ///
  const char *FormEncodingString(unsigned Encoding);
  
  /// OperationEncodingString - Return the string for the specified operation
  /// encoding.
  const char *OperationEncodingString(unsigned Encoding);
  
  /// AttributeEncodingString - Return the string for the specified attribute
  /// encoding.
  const char *AttributeEncodingString(unsigned Encoding);
  
  /// DecimalSignString - Return the string for the specified decimal sign
  /// attribute.
  const char *DecimalSignString(unsigned Sign);
  
  /// EndianityString - Return the string for the specified endianity.
  ///
  const char *EndianityString(unsigned Endian);
  
  /// AccessibilityString - Return the string for the specified accessibility.
  ///
  const char *AccessibilityString(unsigned Access);
  
  /// VisibilityString - Return the string for the specified visibility.
  ///
  const char *VisibilityString(unsigned Visibility);
  
  /// VirtualityString - Return the string for the specified virtuality.
  ///
  const char *VirtualityString(unsigned Virtuality);
  
  /// LanguageString - Return the string for the specified language.
  ///
  const char *LanguageString(unsigned Language);
  
  /// CaseString - Return the string for the specified identifier case.
  ///
  const char *CaseString(unsigned Case);
  
  /// ConventionString - Return the string for the specified calling convention.
  ///
  const char *ConventionString(unsigned Convention);
  
  /// InlineCodeString - Return the string for the specified inline code.
  ///
  const char *InlineCodeString(unsigned Code);
  
  /// ArrayOrderString - Return the string for the specified array order.
  ///
  const char *ArrayOrderString(unsigned Order);
  
  /// DiscriminantString - Return the string for the specified discriminant
  /// descriptor.
  const char *DiscriminantString(unsigned Discriminant);
  
  /// LNStandardString - Return the string for the specified line number standard.
  ///
  const char *LNStandardString(unsigned Standard);
  
  /// LNExtendedString - Return the string for the specified line number extended
  /// opcode encodings.
  const char *LNExtendedString(unsigned Encoding);
  
  /// MacinfoString - Return the string for the specified macinfo type encodings.
  ///
  const char *MacinfoString(unsigned Encoding);
  
  /// CallFrameString - Return the string for the specified call frame instruction
  /// encodings.
  const char *CallFrameString(unsigned Encoding);
  
  // Constants for the DWARF5 Accelerator Table Proposal
  enum AcceleratorTable {
    // Data layout descriptors.
    DW_ATOM_null = 0u,       // Marker as the end of a list of atoms.
    DW_ATOM_die_offset = 1u, // DIE offset in the debug_info section.
    DW_ATOM_cu_offset = 2u, // Offset of the compile unit header that contains the
                            // item in question.
    DW_ATOM_die_tag = 3u,   // A tag entry.
    DW_ATOM_type_flags = 4u, // Set of flags for a type.
  
    // DW_ATOM_type_flags values.
  
    // Always set for C++, only set for ObjC if this is the @implementation for a
    // class.
    DW_FLAG_type_implementation = 2u,
  
    // Hash functions.
  
    // Daniel J. Bernstein hash.
    DW_hash_function_djb = 0u
  };
  
  /// AtomTypeString - Return the string for the specified Atom type.
  const char *AtomTypeString(unsigned Atom);
  
  // Constants for the GNU pubnames/pubtypes extensions supporting gdb index.
  enum GDBIndexEntryKind {
    GIEK_NONE,
    GIEK_TYPE,
    GIEK_VARIABLE,
    GIEK_FUNCTION,
    GIEK_OTHER,
    GIEK_UNUSED5,
    GIEK_UNUSED6,
    GIEK_UNUSED7
  };
  
  const char *GDBIndexEntryKindString(GDBIndexEntryKind Kind);
  
  enum GDBIndexEntryLinkage {
    GIEL_EXTERNAL,
    GIEL_STATIC
  };
  
  const char *GDBIndexEntryLinkageString(GDBIndexEntryLinkage Linkage);
  
  /// The gnu_pub* kind looks like:
  ///
  /// 0-3  reserved
  /// 4-6  symbol kind
  /// 7    0 == global, 1 == static
  ///
  /// A gdb_index descriptor includes the above kind, shifted 24 bits up with the
  /// offset of the cu within the debug_info section stored in those 24 bits.
  struct PubIndexEntryDescriptor {
    GDBIndexEntryKind Kind;
    GDBIndexEntryLinkage Linkage;
    PubIndexEntryDescriptor(GDBIndexEntryKind Kind, GDBIndexEntryLinkage Linkage)
        : Kind(Kind), Linkage(Linkage) {}
    /* implicit */ PubIndexEntryDescriptor(GDBIndexEntryKind Kind)
        : Kind(Kind), Linkage(GIEL_EXTERNAL) {}
    explicit PubIndexEntryDescriptor(uint8_t Value)
        : Kind(static_cast<GDBIndexEntryKind>((Value & KIND_MASK) >>
                                              KIND_OFFSET)),
          Linkage(static_cast<GDBIndexEntryLinkage>((Value & LINKAGE_MASK) >>
                                                    LINKAGE_OFFSET)) {}
    uint8_t toBits() { return Kind << KIND_OFFSET | Linkage << LINKAGE_OFFSET; }
  
  private:
    enum {
      KIND_OFFSET = 4,
      KIND_MASK = 7 << KIND_OFFSET,
      LINKAGE_OFFSET = 7,
      LINKAGE_MASK = 1 << LINKAGE_OFFSET
    };
  };
  
  } // End of namespace dwarf
  
  } // End of namespace llvm
  
  #endif
  