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.

int foo()
{
    static size_t fourty2 = 42;
    version(X86)
    asm
    {
        naked;
        mov EAX, fourty2;
        ret;
    }
    else version (X86_64)
    {
      asm
      {
	naked;
	movq RAX,fourty2;
	ret;
      }
    }
    else static assert(0, "todo");
}

void main()
{
    int i = foo();
    printf("i == %d\n", i);
    assert(i == 42);
}

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