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.nested19;

void main()
{
    int i = 1;
    
    class C
    {
        int j = 2;
        void func()
        {
            int k = 3;
            
            void foo()
            {
                i = i+j+k;
            }
            
            foo();
        }
    }
    
    auto c = new C;
    c.func();
    
    assert(i == 6);
}