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); } } }}}

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

class BaseClass {} 
 
void main() 
{ 
    Object o_cr = BaseClass.classinfo.create();
    Object o_new = new BaseClass;
    printf("CIaddr: %X\n", cast(size_t*)BaseClass.classinfo);
    printf("Create: %X\n", cast(size_t*)o_cr.classinfo);
    printf("New:    %X\n", cast(size_t*)o_new.classinfo);
    assert(cast(size_t*)o_cr.classinfo == cast(size_t*)o_new.classinfo);
}