[PATCH] D87939: [PeepholeOptimizer] Enhance the redundant COPY elimination.

[Michael Liao via Phabricator via llvm-commits]

hliao created this revision.
hliao added reviewers: qcolombet, arsenm.
Herald added subscribers: llvm-commits, kerbowa, dmgreen, hiraditya, nhaehnle, jvesely.
Herald added a project: LLVM.
hliao requested review of this revision.
Herald added a subscriber: wdng.

- Eliminate redundant COPYs from the same register & subregister pair.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D87939

Files:
  llvm/lib/CodeGen/PeepholeOptimizer.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/extractelement.i128.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/sdiv.i64.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/srem.i64.ll
  llvm/test/CodeGen/AMDGPU/sgpr-copy-local-cse.ll
  llvm/test/CodeGen/AMDGPU/waitcnt-vscnt.ll
  llvm/test/CodeGen/Thumb2/mve-vcvt16.ll

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