fuse_concat.cpp

/*
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 * Copyright (c) 2015-2022 Advanced Micro Devices, Inc. All rights reserved.
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 * furnished to do so, subject to the following conditions:
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#include <migraphx/fuse_concat.hpp>
#include <migraphx/dead_code_elimination.hpp>
#include <migraphx/instruction.hpp>
#include <migraphx/pass_manager.hpp>
#include <migraphx/program.hpp>
#include <migraphx/make_op.hpp>
#include <migraphx/functional.hpp>

#include <test.hpp>
#include <pointwise.hpp>

void run_pass(migraphx::program& p)
{
    migraphx::run_passes(p, {migraphx::fuse_concat{}, migraphx::dead_code_elimination{}});
}

template<class F>
struct concat_arg
{
    std::string name;
    std::vector<migraphx::instruction_ref> inputs;
    F f;
};

template<class F>
concat_arg<F> arg(std::string name, std::vector<migraphx::instruction_ref> inputs, F f)
{
    return {std::move(name), std::move(inputs), std::move(f)};
}

template <class Arg, class... Args>
migraphx::instruction_ref add_concat(migraphx::program& p,
                                     std::size_t axis,
                                     Arg post_arg,
                                     Args... args)
{
    std::vector<migraphx::module_ref> module_inputs;
    std::vector<migraphx::instruction_ref> ins_inputs;
    migraphx::each_args([&](auto arg) {
        module_inputs.push_back(create_pointwise_module(p, arg.name, arg.inputs, arg.f));        
        ins_inputs.insert(ins_inputs.end(), arg.inputs.begin(), arg.inputs.end());
    }, args...);
    module_inputs.push_back(create_pointwise_module(p, post_arg.name, {}, [&](auto* pm, auto&&) {
        std::vector<migraphx::instruction_ref> params;
        params.push_back(pm->add_parameter("!x0", migraphx::shape{ins_inputs.back()->get_shape().type()}));
        std::transform(post_arg.inputs.begin(), post_arg.inputs.end(), std::back_inserter(params), [&](auto input) {
            return pm->add_parameter("x" + std::to_string(params.size()),
                                     migraphx::shape{input->get_shape().type()});
        });
        return post_arg.f(pm, params);
    }));
    auto* mm = p.get_main_module();
    return mm->add_instruction(migraphx::make_op("fused_concat", {{"axis", axis}}), ins_inputs, module_inputs);
}

TEST_CASE(simple_pointwise_concat)
{
    migraphx::shape s{migraphx::shape::float_type, {2, 3}};
    migraphx::program p1;
    {
        auto* mm   = p1.get_main_module();
        auto x     = mm->add_parameter("x", s);
        auto y     = mm->add_parameter("y", s);
        auto add = add_pointwise(p1, "main:pointwise0", {x, y}, single_pointwise("add"));
        auto sub = add_pointwise(p1, "main:pointwise1", {x, y}, single_pointwise("sub"));
        auto concat = mm->add_instruction(migraphx::make_op("concat", {{"axis", 1}}), add, sub);
        auto relu = add_pointwise(p1, "main:pointwise2", {concat}, single_pointwise("relu"));
        mm->add_return({relu});
    }
    run_pass(p1);
    migraphx::program p2;
    {
        auto* mm   = p2.get_main_module();
        auto x     = mm->add_parameter("x", s);
        auto y     = mm->add_parameter("y", s);
        auto fused_concat = add_concat(p2, 1, arg("main:pointwise2:concat", {}, single_pointwise("relu")), arg("concat:main:pointwise0", {x, y}, single_pointwise("add")), arg("concat:main:pointwise1", {x, y}, single_pointwise("sub")));
        mm->add_return({fused_concat});
    }
    EXPECT(p1 == p2);
}

int main(int argc, const char* argv[]) { test::run(argc, argv); }