[PATCH] D141221: [AVR] Fix incorrect expansion of the pseudo 'ELPMBRdZ' instruction

[Ben Shi via Phabricator via llvm-commits]

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The 'ELPM' instruction has three forms:

------------------------

form        | feature

- | --------- ELPM        | hasELPM ELPM Rd, Z  | hasELPMX ELPM Rd, Z+ | hasELPMX ------------------------

The second form is always used in the expansion of the pseudo
instruction 'ELPMBRdZ'. But for devices without ELPMX and
with only ELPM, only the first form can be used.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D141221

Files:
  llvm/lib/Target/AVR/AVRExpandPseudoInsts.cpp
  llvm/lib/Target/AVR/AVRISelDAGToDAG.cpp
  llvm/test/CodeGen/AVR/elpm.ll

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