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 memory1;

extern(C) int printf(char*,...);

void main()
{
    auto a = new int[16];
    {printf("array.length = %u\n", a.length);}
    {a.length = a.length + 1;}
    {printf("array.length = %u\n", a.length);}
    {assert(a.length == 17);}
}