Address @Meinersbur comments. Remove the Loop Peeling files since it is unrelated to fusion. The Loop Peeling changes revision is here: D83056

@fhahn added the followup patch D82927. Also ping at reviewers of this patch! Thanks!

Some NFC modifications.

Update function description comments based on review.

Updated comments based on review.

Updated the code based on review.

@fhahn I think a follow-up patch will take a little bit of time to develop so here is a quick example.

for (i = 0; i < 10; ++i)
  a[i] = a[i] + 3;
for (j = 1; j < 10; ++j)
  b[j] = b[j] + 5;

In D80580#2055720, @fhahn wrote:

Could you elaborate why this change is desired? Is there a problem with getting the unrolling preferences and checking the peeling properties in that way? If that's the case it would be good to provide some context (e.g. in form of a follow-on patch that uses the new PeelingPreferences).