[llvm] [Dwarf] Emit `DW_AT_bit_size` for non-byte-sized types (PR #137118)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> Yeah, not sure we should create `DW_OP_LLVM_convert, 1` and if we do, not sure we should lower it to an integer of size 1... doesn't seem likely to be what most consumers would expect?

Can we mask out the high bits with `DW_OP_and` instead?


https://github.com/llvm/llvm-project/pull/137118