(draft PR for comparison only) Compare old loop nest constraint branch to new branch

[jdsteve2]

DO NOT MERGE

Comparison of old loop nest constraint branch to new one to aid transplantation of functionality. Unfortunately, this branch also has all the new dependency stuff in it, which will also show up in the comparison.

PR for new loop nest constraint branch here.

Comparison seems to be including changes where the branches actually match, but this diff seems to be working.