[PATCH] Don't ever call materializeAllPermanently during LTO

[Rafael Espíndola]

> LGTM.  Nice cleanup.

Thanks.

>> By itself this patch has a small impact. Its main advantage is opening
>> the way for trying to make debug reading lazy too.
>
> How?

Just because it is hard to read anything lazily after a call to
materializeAllPermanently since it destroys the link with the .bc
file.

There is still a *lot* of work to make it possible to lazily read anything else.

Cheers,
Rafael