libg++ won't build with latest snapshots

[Mark Mitchell]

>>>>> "Alexandre" == Alexandre Oliva <oliva@lsd.ic.unicamp.br> writes:

    >> + /* Don't use tree-inlining for functions with named return
    >> values.  + That doesn't work properly because we don't do any
    >> translation of + the RETURN_INITs when they are copied.  */ +
    >> DECL_UNINLINABLE (current_function_decl) = 1;

    Alexandre> Is this supposed to remain so, or will there be some
    Alexandre> effort to arrange that functions with named return
    Alexandre> values become inlinable?  

They're still RTL inlinable -- nothing has been lost relative to the
good old days.

    Alexandre> uninlinable, I'll post a patch to the docs to state
    Alexandre> this.  Maybe we should even deprecate named return
    Alexandre> values, now that we have inlining of trees, which I
    Alexandre> believe accomplishes a similar degree of optimization.

Actually, the thing that provides equivalent optimization is the
return-value optimization.  That's certainly feasible, now that we can
operate on trees, but I'm not sure when it will get done.

--
Mark Mitchell                   mark@codesourcery.com
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