GyreD API example

gyre_example.d

import gyre.mnemonics;

Graph graph;
graph.initialize(MacroNode.ID(42));
scope(exit) graph.dispose();

assert(graph.exported == 0);
assert(graph.length == 0);

// imagine we're compiling something like
//    foo(ret, x) {
//        a = x + 1
//        b = 1 + x
//        y = a / b
//        ret(y)
//    }
with (Subgraph.init) {
    reserve(6);

    auto foo = insert!func(2);
    auto jmp = insert!jump(1);
    auto y = insert!divu;
    auto a = insert!addnos;
    auto b = insert!addnos;
    auto c1 = insert!const_(1);

    auto params = foo.channels[0];
    auto ret = &params[0];
    auto x = &params[1];

    link!"control"(foo, jmp.control);

    link!"continuation"(jmp, ret);
    link!"arguments"(jmp, 0, y.quotient);

    link!"dividend"(y, a.result);
    link!"divisor"(y, b.result);

    link!"lhs"(a, x);
    link!"rhs"(a, c1.value);

    link!"lhs"(b, c1.value);
    link!"rhs"(b, x);

    commit(graph, (node, inGraph){
        if (node is foo.asNode) {
            auto fooInGraph = JoinNode.ofNode(inGraph);
            graph.export_(fooInGraph.definition);
        }
    });
}

// since `a` and `b` compute the same value, one was CSE'd away
assert(graph.length == 5);
assert(graph.exported == 1);