Make == for associative arrays test for equality, not identity. _aaEq was added to runtime/internal/aaA.d which forwards to TypeInfo_AssociativeArray.equals in genobj.d. On the codegen side, DtoAAEquals was added to gen/aa.cpp and is called from EqualExp::toElem in gen/toir.cpp. I assume that the frontend will produce an error if == is used on associative arrays of different type. This fixes DMD bug 1429.

module tangotests.aa1_1;

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

void main()
{
    int[int] map;
    map[1] = 1;
    map[10] = 1;
    map[11] = 11;
    map[14] = 41;
    map[21] = 12;
    map[23] = 32;
    map[32] = 23;
    map[201] = 102;
    foreach(k,v; map)
    {
        printf("%d:%d ", k,v);
    }
    printf("\n");
}