Fix CodeGen unit tests

[dylanmckay]

Upon forking the original AVR-LLVM repository, a set of AVR tests were imported in the process.

They currently do not pass, and so they need to be fixed.

All of the imported tests exist in test/CodeGen/AVR.

Here are the tests:

• add.ll
• alloca.ll
• and.ll
• brind.ll
• call.ll
• cmp.ll
• com.ll
• directmem.ll
• dynalloca.ll
• frame.ll
• inline-asm.ll
• interrupts.ll
• io.ll
• load.ll
• mul.ll
• neg.ll
• or.ll
• progmem.ll
• return.ll
• sext.ll
• store.ll
• sub.ll
• trunc.ll
• varargs.ll
• xor.ll
• zext.ll

[RandomInsano]

Can we put this sort of thing in the Wiki or a standalone file?

[dylanmckay]

Can we put this sort of thing in the Wiki or a standalone file?

I believe this is a fairly small task, and that is overkill.

[dylanmckay]

I had mistakenly closed the issue after I updated the tests to LLVM master, but the issues were still failing.

I have marked all failing tests as XFAIL so that they can be fixed.