Fixed ModuleInfo generation to no longer use the ModuleInfo class' default initializer for types/defaults, it's unsafe as initializers don't necesarily match the "formal" type. There might be explicit padding. Changed -g switch to emit DW_LANG_D debug info, make demangling work with a patched GDB, still more work to do for full support of D's Dwarf extensions. Added getNullValue helper method.

#ifndef LDC_IR_IRTYPE_H
#define LDC_IR_IRTYPE_H

#include <set>

namespace llvm {
    class PATypeHolder;
}

struct IrType
{
    static std::set<IrType*> list;
    static void resetAll();

    // overload all of these to make sure
    // the static list is up to date
    IrType();
    IrType(const IrType& s);
    ~IrType();

    void reset();

    llvm::PATypeHolder* type;
};

#endif