[all-commits] [llvm/llvm-project] 534f6e: [PeepholeOptimizer] Enhance the redundant COPY eli...

[darkbuck via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 534f6e171808cfe9f3f9e3de7e754715d038c409
      https://github.com/llvm/llvm-project/commit/534f6e171808cfe9f3f9e3de7e754715d038c409
  Author: Michael Liao <michael.hliao at gmail.com>
  Date:   2020-09-22 (Tue, 22 Sep 2020)

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

  Log Message:
  -----------
  [PeepholeOptimizer] Enhance the redundant COPY elimination.

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

Differential Revision: https://reviews.llvm.org/D87939