Method MatchFunctionParamIds

source/diff/diff.cpp:1722–1763

}

void Differ::MatchFunctionParamIds(const opt::Function* src_func,
                                   const opt::Function* dst_func) {
  IdGroup src_params;
  IdGroup dst_params;
  src_func->ForEachParam(
      [&src_params](const opt::Instruction* param) {
        src_params.push_back(param->result_id());
      },
      false);
  dst_func->ForEachParam(
      [&dst_params](const opt::Instruction* param) {
        dst_params.push_back(param->result_id());
      },
      false);

  GroupIdsAndMatch<std::string>(
      src_params, dst_params, "", &Differ::GetSanitizedName,
      [this](const IdGroup& src_group, const IdGroup& dst_group) {
        // There shouldn't be two parameters with the same name, so the ids
        // should match. There is nothing restricting the SPIR-V however to have
        // two parameters with the same name, so be resilient against that.
        if (src_group.size() == 1 && dst_group.size() == 1) {
          id_map_.MapIds(src_group[0], dst_group[0]);
        }
      });

  // Then match the parameters by their type.  If there are multiple of them,
  // match them by their order.
  GroupIdsAndMatchByMappedId(
      src_params, dst_params, &Differ::GroupIdsHelperGetTypeId,
      [this](const IdGroup& src_group_by_type_id,
             const IdGroup& dst_group_by_type_id) {
        const size_t shared_param_count =
            std::min(src_group_by_type_id.size(), dst_group_by_type_id.size());

        for (size_t param_index = 0; param_index < shared_param_count;
             ++param_index) {
          id_map_.MapIds(src_group_by_type_id[param_index],
                         dst_group_by_type_id[param_index]);
        }
      });
}

float Differ::MatchFunctionBodies(const InstructionList& src_body,
                                  const InstructionList& dst_body,