message: [TF:XLA] Add a bit more documentation to dynamic_padder.h, based on a discussion with yunxing@.
diff: @@ -32,6 +32,10 @@ namespace xla {
  // identity value so that in doesn't affect the result of subsequent
  // instruction. For example, it'd reset the padding to 0 before a bounded shape
  // is consumed by a reduce-sum.
  +//
  +// Dynamic_padder removes dynamic shapes from the entry computation, and inserts
  +// custom calls (with dynamic shapes), which are lowered by specialized
  +// emitters: PadToStatic and SliceToDynamic.
  class DynamicPadder : public HloModulePass {
  public:
  absl::string_view name() const override { return "dynamic_padder"; }
  