Re: [tree-ssa] Gimplifying Java

[Diego Novillo <dnovillo at redhat dot com>]

On Tue, 2003-06-17 at 14:29, Andrew Haley wrote:

> which is (believe it or not) correct, except for a minor gotcha in
> that the local variable 'z' is not being SSAd - as you can see it's
> initialized twice in this method.  I have no idea why.
>
Neat!  I don't know I understand what you mean about 'z' not being
SSA'd.  Can you show me the -fdump-tree-ssa output?

> You may have noticed :-) that there is a ton of unnecessary
> temporaries.  That's bad of course, but I'll look at that later.  The
> main reason for these temporaries in the Java compiler is that the gcc
> is very prone to rearranging expressions.  I presume that SIMPLE won't
> do that, so I can remove some of them.
> 
Not yet, but we may in the future.  There's been talk on and off about
extra expression bits to disallow reordering.


Diego.