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); } } }}}

void foo()
{
    version(X86)
    asm
    {
        naked;
        jmp pass;
        hlt;
pass:   ret;
    }
    else version(X86_64)
    asm
    {
        naked;
        jmp pass;
        hlt;
pass:   ret;
    }
    else static assert(0, "todo");
}

void main()
{
    foo();
}