Function gcd

src/gopt/impl/global_layout_transform/reformat_manager.cpp:12–23

namespace {
static inline int gcd(const int& p, const int& q) {
    int x = p, y = q;
    while (y != 0) {
        if (x < y) {
            y = (y % x);
        } else {
            x = (x % y);
            std::swap(x, y);
        }
    }
    return x;
}

static inline size_t extra_alignment(
        ReformatManager::ReformatKey::Attribute attr, TensorFormats target_formats,