[patch] New loop flattening pass on tree-ssa

[Sebastian Pop]

On Wed, Oct 27, 2010 at 13:23, Richard Guenther
<richard.guenther@gmail.com> wrote:
> On Tue, Oct 26, 2010 at 4:49 PM, Sebastian Pop <sebpop@gmail.com> wrote:
>> On Tue, Oct 26, 2010 at 14:44, Richard Guenther
>> <richard.guenther@gmail.com> wrote:
>>> What's the motivation for adding a 2nd unconditional if-conversion pass?
>>
>> I guess we could make the second if-conversion a sub-pass of
>> loop-flat, such that it applies only if we flattened some loop.
>
> At least that.  Why does loop flattening not remove the forward edges itself?

Because we already have the if-conversion pass that does that.

We could make loop flattening directly call the if-conversion
of the loop that was flattened.  Then loop flattening would look
like what you suggest.  Do you want me to implement this change?

Thanks,
Sebastian