[tsan] ThreadSanitizer instrumentation part

[Jakub Jelinek]

On Thu, Nov 01, 2012 at 02:19:43PM -0700, Xinliang David Li wrote:
> Right -- I found the same thing, it is the ivopt that resets it -- the
> IV opt pass should have a TODO_update_address_taken.

That wouldn't change anything.  The IVopts pass adds some_ptr = &a[0];
to the IL, so a is then address taken.

	Jakub