Add DWARF 5 macro attributes and macro information entry types.

[sivachandra]

Summary

This adds support for the .debug_macro section of the DWARF 5 spec.

[echristo]

LGTM.

Thanks!

-eric

[sivachandra]

Thanks for the quick review.

I do not have commit access. Can someone commit this for me?

[echristo]

Committed thusly:

dzur:~/sources/llvm> git svn dcommit
Committing to https://llvm.org/svn/llvm-project/llvm/trunk ...
M include/llvm/Support/Dwarf.h
Committed r255679

include/llvm/Support/Dwarf.h

enum Attribute : uint16_t {
   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_macros = 0x79,
 
   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,
enum Attribute : uint16_t {
   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,
+  DW_AT_GNU_macros = 0x2119,
 
   // 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,
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 MacroEntryType {
+  // Macro Information Entry Type Encodings
+  DW_MACRO_define = 0x01,
+  DW_MACRO_undef = 0x02,
+  DW_MACRO_start_file = 0x03,
+  DW_MACRO_end_file = 0x04,
+  DW_MACRO_define_indirect = 0x05,
+  DW_MACRO_undef_indirect = 0x06,
+  DW_MACRO_transparent_include = 0x07,
+  DW_MACRO_define_indirect_sup = 0x08,
+  DW_MACRO_undef_indirect_sup = 0x09,
+  DW_MACRO_transparent_include_sup = 0x0a,
+  DW_MACRO_define_indirectx = 0x0b,
+  DW_MACRO_undef_indirectx = 0x0c,
+  DW_MACRO_lo_user = 0xe0,
+  DW_MACRO_hi_user = 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,