[PATCH] D76640: [GlobalISel] Combine (x op 0) -> x for operations with a right identity of 0

[Jessica Paquette via Phabricator via llvm-commits]

paquette updated this revision to Diff 252182.
paquette retitled this revision from "[GlobalISel] Combine (x - 0) -> x" to "[GlobalISel] Combine (x op 0) -> x for operations with a right identity of 0".
paquette edited the summary of this revision.
paquette added a comment.

- Just do every right identity I can think of instead of just G_SUB
- Use `mi_match`
- Keep MOP because it's the right thing to do


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D76640/new/

https://reviews.llvm.org/D76640

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-trivial-arith.mir

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