[tree-ssa] reaching def. question

[Diego Novillo]

On Wed, 2004-03-17 at 02:21, Zdenek Dvorak wrote:

> I have thought about this issue for some time -- would not it be better
> to do ssa rewriting over ssa names, thus not requiring the rewrite out
> of ssa?
>
That was the original design, yes.  See my other reply to this thread
earlier today.

>  I.e. to allow the ssa name temporarily have several definitions,
> and do rewriting just over them?  It might be faster.  It also would not
> need to do rewriting out of ssa, which may require you to insert new
> assignments that must be later optimized out.  It would also allow you
> not to lose ssa name tags in the process.
> 
It would also reduce the "missing variable" problem, like in the example
I quoted before.  We'll see.


Diego.