Reverts llvm/llvm-project#137237, as the problem was fixed with
92dc18b6df043d788d77b4a98e5afa3954a44cb0.

Reverts llvm/llvm-project#136205

Breaks buildbots, probably something about needing to restrict the test
to running on a specific target or the like - I haven't looked closely.

Co-authored-by: Vladislav Dzhidzhoev <dzhidzhoev@gmail.com>

During the discussion under
https://github.com/llvm/llvm-project/pull/119001, it was noticed that
concrete DW_TAG_lexical_blocks should refer to corresponding abstract
DW_TAG_lexical_blocks by having DW_AT_abstract_origin, to avoid
ambiguity. This behavior is implemented in GCC
(https://godbolt.org/z/Khrzdq1Wx), but not in LLVM.

Fixes https://github.com/llvm/llvm-project/issues/49297.

DenseSet, SmallPtrSet, SmallSet, SetVector, and StringSet recently
gained C++23-style insert_range.  This patch replaces:

  Dest.insert(Src.begin(), Src.end());

with:

  Dest.insert_range(Src);

This patch does not touch custom begin like succ_begin for now.

#125983

This reverts commit 5fadb3d680909ab30b37eb559f80046b5a17045e.

Prefer the nonstatic member by converting unsigned to Register instead.

Fix an issue with defining actual DWARF address space for module scope
globals. Previously it was always `ADDR_global_space`.

Also, this patch introduces CUDA-specific DWARF codes for address space
specification in correspondence with:

https://docs.nvidia.com/cuda/ptx-writers-guide-to-interoperability/index.html#cuda-specific-dwarf-definitions
Previously hardcoded constant values are replaced with enum values.