[Feature] - Support new instructions and functionality of LLVM20

[smaillet]

Is your feature request related to a problem? Please describe.
LLVM 20 has new instructions and functionality not present in prior releases. This library should include updates to expose that.

Describe the solution you'd like
As part of conversion to LLVM the NEW code generation support should include new LLVM 20 functionalities not present in older versions.

Additional context
There are likely a large number of sub items to work on for this overarching work item.