[PATCH] D60365: [AVR] Fix codegen for rotate instructions

[Daan Sprenkels via Phabricator via llvm-commits]

dsprenkels updated this revision to Diff 200179.
dsprenkels removed a reviewer: shepmaster.
dsprenkels added a comment.

Updates:

- Use the temporary registers r1 and r0, instead of scavenging spare registers.
  - And update the test case.
- Add the definition `const unsigned ZERO_REGISTER = AVR::R1` for future use.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D60365/new/

https://reviews.llvm.org/D60365

Files:
  llvm/lib/Target/AVR/AVRExpandPseudoInsts.cpp
  llvm/lib/Target/AVR/AVRISelLowering.cpp
  llvm/lib/Target/AVR/AVRInstrInfo.td
  llvm/test/CodeGen/AVR/rot.ll

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