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.

void test(void delegate() spam)
{
    static void foo() // static is the problem
    {
        uint x;
        void peek() { x = 0; }
    }

    void bar()
    {
        spam();
    }
}