message: [TF:XLA] Fix overflow when generating masks for bitcasts to a smaller bit width.
diff: @@ -149,7 +149,7 @@ class BitcastOp : public XlaOpKernel {
  auto reshaped_input_shape = ctx->InputShape(0);
  broadcasted_input_shape.AddDim(input_bit_width / output_bit_width);
  reshaped_input_shape.AddDim(1);
  - auto output_bit_width_mask = (1 << output_bit_width) - 1;
  + auto output_bit_width_mask = (int64(1) << output_bit_width) - 1;
  auto status_or_input =
  BroadcastTo(xla::Reshape(input, reshaped_input_shape.dim_sizes()),
  