What to remove after tree-ssa is merged?

[Andrew Pinski]

On Feb 4, 2004, at 06:39, Richard Kenner wrote:

>     Should really PLACEHOLDER_EXPR be done in the front-end
>     and be expanded to what it really does in gimplify stage
>     which every other language needs to do with its language
>     specific trees.
>
> Read the documentation and explain what you propose expanding it *to*.
> There's no way to express the needed semantics without this or 
> something
> very similar.

If you are playing this trick where is this documentation, I do not see 
it in doc/*.texi at
all.  There is only one reference to it in doc and that is the 
documentation for c-trees
(which is a little lacking by the way but it was added the fact) and it 
just says:

Normally these expressions will reference a field in the
outer object using a @code{PLACEHOLDER_EXPR}.
.


Thanks,
Andrew Pinski