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Re: Various reworkings of PLACEHOLDER stuff


    Just curious: What are the future plans for the Ada front end with
    tree-ssa in mind?

Well, I'm not very familiar with the tree-ssa experiment, so I can't comment on
that, but I can on your other questions.

    Ada does not build functions as trees, 

That is on my list of things to do.

    and it is the only front end that uses PLACEHOLDER_EXPR tree nodes.

Right: as far as I know, Ada is the only language with
self-referential objects in terms of sizes, positions, and bounds.

    And PLACEHOLDER_EXPR is not part of GIMPLE...

Since it's a defined tree node, it most certainly should be (I assume
WITH_RECORD_EXPR isn't either), but not much has to be done with it
since it's used only when converting trees to RTL.


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