The regression test gcc.dg/torture/pr57147-2.c triggers a valid warning by passing a variable with zero size to a function that expects an array of size 1. The recent change to run the access pass also earlier in the optimization pipeline has triggered this warning. In r12-6713 I have committed a change to prune the warning out.
https://gcc.gnu.org/g:282110ae8b54250c8dcb73afc6f30761a41e38e6 I saw the test failure in my build before committing the original change but then couldn't reproduce it so I chalked it up to cosmic rays without deeper investigation. My bad. Martin
