[PATCH] D117802: [AVR] Use correct register class for LPM/ELPM

[Ayke via Phabricator via llvm-commits]

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This was worked around in pseudo instruction expanson pass using `scavengeGPR8` or pushing/popping registers, but there is a much simpler solution: specify the correct register class for these instructions.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D117802

Files:
  llvm/lib/Target/AVR/AVRExpandPseudoInsts.cpp
  llvm/lib/Target/AVR/AVRInstrInfo.td
  llvm/lib/Target/AVR/AVRRegisterInfo.td

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