[all-commits] [llvm/llvm-project] 6c951c: [SelectionDAG][DAGCombiner] Reuse exist node by re...

[chenglin.bi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6c951c5ee6d0b848877cb8ac7a9cb2a9ef9ebbb5
      https://github.com/llvm/llvm-project/commit/6c951c5ee6d0b848877cb8ac7a9cb2a9ef9ebbb5
  Author: chenglin.bi <chenglin.bi at cixcomputing.com>
  Date:   2022-06-21 (Tue, 21 Jun 2022)

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

  Log Message:
  -----------
  [SelectionDAG][DAGCombiner] Reuse exist node by reassociate

When already have (op N0, N2), reassociate (op (op N0, N1), N2) to (op (op N0, N2), N1) to reuse the exist (op N0, N2)

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D122539