[PATCH] D122539: [SelectionDAG][DAGCombiner] Reuse exist node by reassociate

[chenglin.bi via Phabricator via llvm-commits]

bcl5980 updated this revision to Diff 436323.
bcl5980 added a comment.

fix all regressions


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D122539/new/

https://reviews.llvm.org/D122539

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/AMDGPU/xor3-i1-const.ll
  llvm/test/CodeGen/X86/2009-03-23-MultiUseSched.ll
  llvm/test/CodeGen/X86/ctpop-combine.ll

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