[tree-ssa] Mainline merge plan

[Frank Ch. Eigler]

David Edelsohn <dje@watson.ibm.com> writes:

> 	Mudflap: narrow-pointer bounds-checking by tree rewriting.
> 	target-libmudflap used to build on AIX, but fail in the testsuite.
> It recently began failing to build.  It is not a critical component of
> Tree-SSA.

That's true.  Because libmudflap's target libc specificity, some ports
have proven to be a challenge, and this is why the top-level
"--disable-libmudflap" option was added a while ago.  (This option is
mentioned in the official merge plan, by the way.)  Assuming the
functionality remains of interest to the community, I hope people will
help finish porting libmudflap once the merge is done.

- FChE