Regression due to tree loop opt / expand weirdness

[Richard Kenner]

    As I don't have the code in question, could you elaborate why
    you think the current test in expand_expr_addr_expr would not
    work for ia64/VMS?  What's the difference to s390x/TPF?

I haven't followed that part of the discussion.  I was merely seconding
RTH's comment that these types are needed in such systems.