[llvm-dev] Live DEBUG_VALUE analysis transfer

[Son Tuan VU via llvm-dev]

Hello,

Looking at the code of Live DEBUG_VALUE analysis which propagates debug
information by inserting new DBG_VALUE instructions to the MIR.

Currently, this pass inserts new DBG_VALUE instructions for register copy,
spill and restore instructions. However, extend instructions such as ARM's
{S|U}XT{B|H} should also have new DBG_VALUE instructions inserted, since
they do kill and define registers.

Is this just a TODO that needs to be implemented, or there is in fact a
reason for this?

Thank you for your time,

Son Tuan Vu
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