[Patch Ping] [RFC] Alias export patch

[Diego Novillo]

BTW, I've noticed these regressions.  Still haven't analyzed them,
though, so I can't confirm whether they're due to your patch.

         FAIL: g++.dg/ext/label3.C execution test

         FAIL: gcc.dg/torture/pr26258.c  -O2  execution test
         FAIL: gcc.dg/torture/pr26258.c  -Os  execution test