Patch: Prune unused DECL_STMTs from saved tree structure

Mark Mitchell
Tue Aug 29 19:10:00 GMT 2000

>>>>> "Zack" == Zack Weinberg <> writes:

    Zack> Upon casual inspection of walk_tree I believe I can make it
    Zack> work.  I notice that it does not descend BLOCK_VARS - why
    Zack> not?

I think because they should always be reachable via DECL_STMT.

The truth is that I would like walk_tree to be a little tidier.  If we
defined tree structure a little more rigorously, we could organize in
it a DAG -- rather than the current cyclic structure.

Mark Mitchell         
CodeSourcery, LLC     

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