Function trim_module

src/driver/trim.cpp:66–105

}

void trim_module(module& m, std::size_t loc, std::size_t n)
{
    if(loc > m.size())
        MIGRAPHX_THROW("Trim out of range.");
    auto last  = std::prev(m.end(), loc);
    auto start = std::prev(last, n);
    m.remove_instructions(last, m.end());
    if(n == 0)
        return;
    if(n > m.size())
        MIGRAPHX_THROW("Trim size out of range.");
    std::unordered_map<instruction_ref, instruction_ref> map_ins;
    std::unordered_set<instruction_ref> instruction_set;
    auto instructions = range(start, m.end());
    for(instruction_ref ins : iterator_for(instructions))
    {
        instruction_set.insert(ins);
        for(auto input : ins->inputs())
        {
            if(contains(instruction_set, input))
                continue;
            auto arg         = capture_arg(instruction_set, input);
            auto placeholder = add_placeholder(m, arg);
            assert(placeholder->get_shape() == arg->get_shape());
            if(placeholder == arg)
                continue;
            instruction_set.insert(placeholder);
            map_ins[arg] = placeholder;
        }
    }
    for(auto [old_ins, new_ins] : map_ins)
        m.replace_instruction(old_ins, new_ins);
    run_passes(m, {dead_code_elimination{}});
    for(auto pins : m.get_parameters())
    {
        if(not pins->outputs().empty())
            continue;
        m.remove_instruction(pins);
    }
}

} // namespace MIGRAPHX_INLINE_NS
} // namespace driver