Make "`aa[key]`" use the same runtime call as "`key in aa`". The runtime calls these were using were different, but with equivalent definitions. With `ldc -O3`, the following functions now all compile to the exact same code: {{{ int[int] y; void foo(int x) { if (x in y) { auto z = x in y; sink(*z); } } void bar(int x) { if (x in y) { sink(y[x]); } } void baz(int x) { if (auto p = x in y) { sink(*p); } } }}}

module vararg2;

void func(...)
{
    assert(_arguments.length == 2);
    assert(_arguments[0] is typeid(int));
    int a = *cast(int*)_argptr;
    _argptr += size_t.sizeof;
    assert(_arguments[1] is typeid(int));
    a += *cast(int*)_argptr;
    _argptr += int.sizeof;
    assert(a == 3);
}

void main()
{
    func(1,2);
}