[PATCH] D72351: [AArch64][GlobalISel] Fold a chain of two G_PTR_ADDs of constant offsets.

[Amara Emerson via Phabricator via llvm-commits]

aemerson created this revision.
aemerson added reviewers: paquette, dsanders.
aemerson added a project: LLVM.
Herald added subscribers: Petar.Avramovic, volkan, hiraditya, kristof.beyls, rovka.

E.g.

  %addr1 = G_PTR_ADD %base, G_CONSTANT 20
  %addr2 = G_PTR_ADD %addr1, G_CONSTANT 8
      -->
  %addr2 = G_PTR_ADD %base, G_CONSTANT 28


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D72351

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-ptradd-chain.mir

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