[Bug bootstrap/63622] [5.0 Regression] Bootstrap fails on x86_64-apple-darwin1[34] after revision r216305

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63622

--- Comment #26 from Iain Sandoe <iains at gcc dot gnu.org> ---
OK - so two more data points.

( i)
With the alias patch, I can bootstrap x86_64-darwin12
However, there are lots of new fails in Ada (for example) that go away when I
force ipa-icf off.

(ii) 
The patch is NOT sufficient to restore bootstrap on powerpc-darwin9 (accepting
that few people care about that platform).

-----

So what this tells us is that the alias patch is necessary, but not sufficient
to fix all the issues.

My latest round of testing was carried out on 217269 - it takes time to spin
the permutations - if there's new stuff in since then - then I should try it.