search for: dw_tag_unspecified_typ

This isn't a realistic/viable implementation, just a hacked up "can I make it produce the right output" kind of thing, but while I hammer out a few more details (like fixing MC to allow multiple sections with the same name but different comdat groups) I figured I'd throw it out there to have a bit of a chat about it. I've tested simple cases of a single type and they seem to

...= 16647, Count = 988, Ops = 4940, Name = DW_TAG_GNU_template_parameter_pack Tag = 52, Count = 9933, Ops = 59598, Name = DW_TAG_variable Tag = 33, Count = 190, Ops = 190, Name = DW_TAG_subrange_type Tag = 59, Count = 1, Ops = 3, Name = DW_TAG_unspecified_type Tag = 40, Count = 24731, Ops = 24731, Name = DW_TAG_enumerator Tag = 21, Count = 354166, Ops = 2833328, Name = DW_TAG_subroutine_type Tag = 2, Count = 77999, Ops = 623992, Name = DW_TAG_class_type Tag = 47, Count = 27122, Ops = 108488, Name = DW_...

...Add stub dll. xapofx1_4: Add stub dll. po: Use English names for Programs Files in Lithuanian translation. x3daudio1_1: Add stub dll. include: Add msasn1.h. Bruno Jesus (1): rsaenh/tests: Fix a copy & paste issue. David Heidelberger (1): dbghelp: Implement DW_TAG_unspecified_type. Erich Hoover (5): server: Implement socket-specific ioctl() routine. server: Add socket-side support for the interface change notification object. server: Add blocked support for SIO_ADDRESS_LIST_CHANGE ioctl(). server: Implement the interface change notification object....

In r219010, I merged integer and string fields into a single header field. By reducing the number of metadata operands used in debug info, this saved 2.2GB on an `llvm-lto` bootstrap. I've done some profiling of DW_TAGs to see what parts of PR17891 and PR17892 to tackle next, and I've concluded that they will be insufficient. Instead, I'd like to implement a more aggressive plan,