[all-commits] [llvm/llvm-project] f22ac1: [DAGCombiner] reassociate reciprocal sqrt expressi...

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  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: f22ac1d15b1b3c8e890cad4aa126a8239bec61f7
      https://github.com/llvm/llvm-project/commit/f22ac1d15b1b3c8e890cad4aa126a8239bec61f7
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2020-08-08 (Sat, 08 Aug 2020)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/test/CodeGen/X86/sqrt-fastmath.ll

  Log Message:
  -----------
  [DAGCombiner] reassociate reciprocal sqrt expression to eliminate FP division, part 2

Follow-up to D82716 / rGea71ba11ab11
We do not have the fabs removal fold in IR yet for the case
where the sqrt operand is repeated, so that's another potential
improvement.