message: [XLA] Don't de-emphasize copy nodes in graph dumps.
diff: @@ -975,7 +975,6 @@ ColorScheme HloDotDumper::GetInstructionColor(const HloInstruction* instr) {
  }
  return kGreen;
  case HloOpcode::kConcatenate:
  - case HloOpcode::kCopy:
  case HloOpcode::kDynamicSlice:
  case HloOpcode::kGather:
  case HloOpcode::kPad:
  @@ -997,6 +996,10 @@ ColorScheme HloDotDumper::GetInstructionColor(const HloInstruction* instr) {
  return kWhite;
  }
  return kGreen;
  + case HloOpcode::kCopy:
  + // Emphasize copy nodes, which are either physical transposes (and thus
  + // significant), or copies of read-only buffers (and thus dead weight).
  + return kGreen;
  case HloOpcode::kConvolution:
  case HloOpcode::kDot:
  case HloOpcode::kFft:
  