Your VLA change and Ada

[Richard Kenner]

Looking quite good.

I can now bootstrap and build the library with loop optimizations enabled,
which I believe is the first time I've been able to do that since those
optimizations were installed.

The ACATS failure profile is slightly different than before, but not
significantly.

I have your gimplify.c change in my tree which you've asked me to commit once
it passes testing, so I need to compare my failures with another run to be sure
that it's clean.

What should I do about your change relating to TMTs that I also have
in my tree?  Is that one you're confident to commit if it too passes testing?

I have a few other minor changes of my own, but I want to deal with
your two ones first, then perhaps fix a few more ACATS tests.