message: [mlir] Enable conversion of HLO SignOp to Linalg.
diff: @@ -1059,6 +1059,7 @@ void populateHLOToLinalgConversionPattern(MLIRContext* context,
  PointwiseToLinalgConverter<mhlo::ShiftLeftOp, false>,
  PointwiseToLinalgConverter<mhlo::ShiftRightArithmeticOp, false>,
  PointwiseToLinalgConverter<mhlo::ShiftRightLogicalOp, false>,
  + PointwiseToLinalgConverter<mhlo::SignOp, false>,
  PointwiseToLinalgConverter<mhlo::SinOp, false>,
  PointwiseToLinalgConverter<mhlo::SqrtOp, false>,
  PointwiseToLinalgConverter<mhlo::SubOp, false>,
  