[all-commits] [llvm/llvm-project] 8e7745: [DAG] visitShiftByConstant - replace constant dete...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8e77458578d601cf714c0f444667f83ea2840621
      https://github.com/llvm/llvm-project/commit/8e77458578d601cf714c0f444667f83ea2840621
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-10-17 (Mon, 17 Oct 2022)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

  Log Message:
  -----------
  [DAG] visitShiftByConstant - replace constant detection with FoldConstantArithmetic

Instead of checking that an operand is constant/opaque before calling getNode() and then checking that the result is a constant, just use FoldConstantArithmetic which will just early-out if the operands are not constant foldable.