[Bug translator/13009] Allow @defined($foo) in probe predicates

[jistone at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13009

--- Comment #2 from Josh Stone <jistone at redhat dot com> 2011-07-20 23:13:42 UTC ---
(In reply to comment #1)
> "But this gives "semantic error: unexpected @defined". "
> 
> That's odd - the code should accept pretty general expressions.

That's coming from typeresolution_info::visit_defined_op, as it's not expecting
@defined expressions to survive this far.  We may just need to tweak all the
var_expanding_visitor invocations to visit the predicate too.

> "and probes with empty bodies are discarded entirely."
> 
> That's bug #11353.

Ah, yes, thanks for jogging my memory.

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