message: Update hlo_ops.cc
diff: @@ -143,7 +143,7 @@ DenseIntElementsAttr BuildConvPaddingAttrs(
  int rank = padding_low.size();
  SmallVector<int64_t, 8> padding;
  - for (unsigned i = 0; i < static_cast<size_t>(rank); ++i) {
  + for (unsigned i = 0, e = rank; i < e; ++i) {
  padding.push_back(GetPaddingValue(padding_attr, {i, 0}) + padding_low[i]);
  padding.push_back(GetPaddingValue(padding_attr, {i, 1}) + padding_high[i]);
  }
  @@ -853,7 +853,7 @@ static Attribute foldConcatenateHelper(ConcatenateOp* op,
  auto shape = type.getShape();
  size_t top_size = 1;
  - for (size_t i = 0; i < axis; i++) {
  + for (int i = 0, e = axis; i < e; i++) {
  top_size = top_size * shape[i];
  }
  @@ -1118,7 +1118,7 @@ static LogicalResult Verify(MapOp op) {
  // increasing.
  auto values = op.dimensions().getValues<int64_t>();
  auto dimensions = std::vector<int64_t>{values.begin(), values.end()};
  - for (int i = 0; static_cast<size_t>(i) < dimensions.size(); ++i) {
  + for (int i = 0, e = dimensions.size(); i < e; ++i) {
  if (dimensions[i] != i)
  return op.emitOpError() << "requires monotonically increasing dimension "
  "numbers, but got: "
  