Remove an old workaround that was kept around for ABI-compatibility on x86-64 between different LLVM versions. This means LLVM r67588 is required if you want to compile for x86-64, otherwise the backend will assert when you try to return e.g. struct { int i; char c; } from a function. (In particular, this is no longer compatible with LLVM 2.5) It also means that any code returning small structs on x86-64 will probably need to be recompiled in order to be linkable to code compiled with this change.

module mini.norun_debug11;

class C
{
}

class D : C
{
    int i = 42;
}

class E : D
{
    float fp = 3.14f;
}

class F : E
{
    F f;
}

void main()
{
    auto c = new C;
    auto d = new D;
    auto e = new E;
    auto f = new F;

    auto ci = c.classinfo;

    int* fail = cast(int*) 1;
    *fail = 0;
}