Unroll / ILP unaware of conditionals about loopy HOT 2 CLOSED

Good catch, thanks for the report. For now, predicates are simply strings representing variable names, but your examples demonstrate that that simply won't suffice. I'll have to allow expressions to allow for these transformations to happen. Not a huge change in principle--I'll see what I can do.

else is doable, too. FWIW, syntax like this:

if blah
   a = b
end

already exists.

from loopy.

This commit addresses the ILP concern, and it's possible that it might also address the unroll case, but I haven't tested that yet.

There are a few loose ends:

• Investigate expression parsing in if-like contexts (basically check that it works, ideally add tests), given that it previously (technically) should have only allowed variables
• I'd be grateful if you could PR me a test for the unroll case, along the lines of the one I've added for your ILP example (see that commit).
• Add else syntax. (if you like) For that, look in loopy/kernel/creation.py and search for IF_RE and its usage sites.

from loopy.