[PATCH] Add code-hoisting to GIMPLE

[Steven Bosscher]

On Mon, Jul 4, 2016 at 1:26 PM, Richard Biener wrote:
>
> The following patch is Stevens code-hoisting based on PRE forward-ported
> and fixed for bootstrap plus the case of hoisting code across loops
> which we generally do not want (expressions in the loop exit target block
> are antic-in throughout the whole loop unless they are killed and thus
> get inserted into the exit block and then PREd before the loop).
>
> Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.
>
> I'm going to try making the bitmap_set ops in do_hoist_insert a bit
> faster - Steven, do you remember any issues with the approach from the
> time you worked on it?

Hi Richi,

It's been almost 8 years since I worked on this, so I really don't
recall much about this at all. Sorry :-)

But thank you for picking this old work up!

Ciao!
Steven