[llvm] [BPF] lowering target address leaf nodes (tconstpool, tblockaddr, tjumptable) (PR #73667)

[Yingchi Long via llvm-commits]

inclyc wrote:

> Please add tests.

These nodes are basic symbols and I don't know how to test it directly, however #73668 referenced tconstpool, would you like to see other nodes get test-coveraged in this way?

(I checked commits in other targets and they seem to commit these pattern without tests, e.g. https://github.com/llvm/llvm-project/commit/bec7b166923bbaf0882ff4665224d7a8a7320aa0)

https://github.com/llvm/llvm-project/pull/73667