[lno] [RFC] if-conversion and auto vectorizer

[Andrew Pinski]

On Mar 14, 2004, at 03:07, Dorit Naishlos wrote:

>> I will also be doing the following soon (after MIN/MAX becomes gimple
>> which has already be discussed and approved):
>
> I seem to have missed the MIN/MAX discussion thread. Do you have a 
> link to
> that, or was it off the mailing list? just curious when is it planned 
> to
> add the MIN/MAX tree codes to gimple and who is responsible for that?

It was discussed off list (on IRC).  Really MIN/MAX is already gimple, 
just that it gets
lowered when gimplifing happens.  Also right now DOM does not 
understand MIN/MAX.
The current plan is remove the lowering when the tree-ssa gets merged 
into the mainline.
I think Daniel Berlin said he would be the one to remove the lowering 
as the linear loop
transformation generates better code with MIN/MAX instead of different 
basic blocks.
I think he also has a patch to teach DOM about it too but I am not too 
sure.

I would like to add the MIN/MAX to tree-ssa-phiopt also the idea behind 
having
MIN/MAX be "instructions" so are that more optimization opportunities 
come up from the
combine of the basic blocks, also it saves memory because of less basic 
blocks.

Thanks,
Andrew Pinski