[llvm] [RISCV][TableGen] Generate RISCVTargetParser.inc from the new RISCVExtension tblgen information. (PR #89335)

[Francesco Petrogalli via llvm-commits]

https://github.com/fpetrogalli commented:

Thank for doing this @topperc !

On top of the few question I have, I think it would be great if you could provide a unit test that shows how some basic TD file is converted into the c++ code we need to include. Especially around march (whether it is manually specified or computed by the backend), and implicit feature that do not have an extension.

Thank you again!

Francesco

https://github.com/llvm/llvm-project/pull/89335