Richard Henderson wrote on 04/10/07 20:30:

> Perhaps I misunderstood what Diego was proposing, but I 
> would have thought the subcode would continue to be the
> tree PLUS_EXPR, and not a GS_PLUS something.

Yes.

> With that, build_foldN does essentially what we want,
> without having to regenerate tree nodes on the input side.

Sure, but things will be different if/when the operands stop being 'tree'.

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