[PATCH] D103326: [GlobalISel] Add combine for PTR_ADD with regbanks

[Sebastian Neubauer via Phabricator via llvm-commits]

sebastian-ne created this revision.
sebastian-ne added reviewers: arsenm, foad, paquette, aemerson.
Herald added subscribers: kerbowa, hiraditya, rovka, nhaehnle, jvesely.
sebastian-ne requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

Combine two G_PTR_ADDs, but keep the register bank of the constant.
That way, the combine can be used in post-regbank-select combines.

This is the first combine in CombinerHelper that uses register banks, I
hope it is the right place.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D103326

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/lib/Target/AMDGPU/AMDGPUCombine.td
  llvm/test/CodeGen/AMDGPU/GlobalISel/extractelement-stack-lower.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/extractelement.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/insertelement.large.ll

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