Depends on: * https://github.com/llvm/llvm-project/pull/168382 As of recent, LLVM includes the bit-size as a `DW_AT_bit_size` (and as part of `DW_AT_name`) of `_BitInt`s in DWARF. This allows us to mark `_BitInt`s as "reconstitutable" when compiling with `-gsimple-template-names`. We still only omit template parameters that are `<= 64` bit wide. So support `_BitInt`s larger than 64 bits is not part of this patch.