[all-commits] [llvm/llvm-project] eb2a40: [NFC] [DAGCombiner] Remove unnecessary negation in...

[Qiu Chaofan via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: eb2a405c181c9833eb8676d147619b8c893dc6fa
      https://github.com/llvm/llvm-project/commit/eb2a405c181c9833eb8676d147619b8c893dc6fa
  Author: Qiu Chaofan <qiucofan at cn.ibm.com>
  Date:   2020-09-01 (Tue, 01 Sep 2020)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/test/CodeGen/PowerPC/fneg.ll

  Log Message:
  -----------
  [NFC] [DAGCombiner] Remove unnecessary negation in visitFNEG

In visitFNEG of DAGCombiner, the folding of (fneg (fsub c, x)) is
redundant since getNegatedExpression already handles it.