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.

// Written in the D programming language by Tomas Lindquist Olsen 2008
// Binding of llvm.c.Core values for D.
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
module llvm.util;

//we need <cstring>
version(Tango) {
    import tango.stdc.string;
}
else {
    import std.c.string;
}

///
char[] from_stringz(char* p)
{
    if (p is null)
        return "";
    return p[0..strlen(p)];
}

///
char* to_stringz(char[] s)
{
    return (s~\0).ptr;
}