Method CodegenInitTuple

be/src/exec/hdfs-scanner.cc:603–643

}

Status HdfsScanner::CodegenInitTuple(
    const HdfsScanPlanNode* node, LlvmCodeGen* codegen, llvm::Function** init_tuple_fn) {
  *init_tuple_fn = codegen->GetFunction(IRFunction::HDFS_SCANNER_INIT_TUPLE, true);
  DCHECK(*init_tuple_fn != nullptr);

  // Replace all of the constants in InitTuple() to specialize the code.
  bool has_template_tuple = !node->partition_key_slots_.empty();
  if (!has_template_tuple) {
    has_template_tuple = node->HasVirtualColumnInTemplateTuple();
  }
  int replaced = 0;
  // If has_template_tuple is true, then we can certainly replace the callsites.
  // If has_template_tuple is false, then we should only replace the callsites for
  // non-Iceberg tables, as for Iceberg tables we might still create a template
  // tuple based on the partitioning in the data files.
  if (has_template_tuple || !node->hdfs_table_->IsIcebergTable()) {
    replaced = codegen->ReplaceCallSitesWithBoolConst(
      *init_tuple_fn, has_template_tuple, "has_template_tuple");
    DCHECK_REPLACE_COUNT(replaced, 1);
  }

  const TupleDescriptor* tuple_desc = node->tuple_desc_;
  replaced = codegen->ReplaceCallSitesWithValue(*init_tuple_fn,
      codegen->GetI32Constant(tuple_desc->byte_size()), "tuple_byte_size");
  DCHECK_REPLACE_COUNT(replaced, 1);

  replaced = codegen->ReplaceCallSitesWithValue(*init_tuple_fn,
      codegen->GetI32Constant(tuple_desc->null_bytes_offset()),
      "null_bytes_offset");
  DCHECK_REPLACE_COUNT(replaced, 1);

  replaced = codegen->ReplaceCallSitesWithValue(*init_tuple_fn,
      codegen->GetI32Constant(tuple_desc->num_null_bytes()), "num_null_bytes");
  DCHECK_REPLACE_COUNT(replaced, 1);

  *init_tuple_fn = codegen->FinalizeFunction(*init_tuple_fn);
  if (*init_tuple_fn == nullptr) {
    return Status("Failed to finalize codegen'd InitTuple().");
  }
  return Status::OK();
}

// ; Function Attrs: noinline
// define i1 @EvalRuntimeFilters(%"class.impala::HdfsScanner"* %this,