[tree-ssa] Functions that return more than one value

[law@redhat.com]

In message <16104.53962.116860.471302@cuddles.redhat.com>, Andrew Haley writes:
 >What does tree SSA form do with functions that return more than one
 >value?
 >
 >Is it legitimate to have something like
 >
 >  a.3, b.2 <- foo (bar.6, baz.9 )
 >
 >?
 >
 >(No, this isn't relevant to Java.  But some languages can return more
 >than one value.)
We don't handle it at the current time.

jeff