[LLVMdev] Volunteers needed: Unit test scaffolding for lib/CodeGen

[Jakob Stoklund Olesen]

We don't currently have a way of writing unit tests for code in lib/CodeGen, and we do have some code that could benefit from having tests. (See r158310).

The problem is that you can't just create a MachineFunction test instance and start poking at it. You need to give it a target first, and certain helper classes like MachineRegisterInfo are also expected to be present.

I am looking for a volunteer to build the scaffolding required in unittests/CodeGen to make it possible to write unit tests for MachineFunction and associated classes. You would need to:

- Set up a unittests/CodeGen target that links in libCodeGen.

- Create a mock target with minimal functionality, preferably without depending on TableGen.

- Provide an easy way for individual tests to get a MachineFunction instance with the required decorations.

This would be a good way to learn about target and codegen configuration.

/jakob