Another shot at fixing the issues with (constant) struct literals and their addresses. See DMD2682, #218, #324. The idea is to separate the notion of const from 'this variable can always be replaced with its initializer' in the frontend. To do that, I introduced Declaration::isSameAsInitializer, which is overridden in VarDeclaration to return false for constants that have a struct literal initializer. So {{{ const S s = S(5); void foo() { auto ps = &s; } // is no longer replaced by void foo() { auto ps = &(S(5)); } }}} To make taking the address of a struct constant with a struct-initializer outside of function scope possible, I made sure that AddrExp::optimize doesn't try to run the argument's optimization with WANTinterpret - that'd again replace the constant with a struct literal temporary.

module tangotests.align1;

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

struct TLA
{
    char[3] tla;
    char[] toString() { return tla; }
    void dump()
    {
        printf("%.*s\n", 3, tla.ptr);
    }
}

void main()
{
    TLA fbi = TLA("FBI");
    fbi.dump();
}