https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63185
--- Comment #7 from Marc Glisse <glisse at gcc dot gnu.org> --- This PR is messy. To sum up, comment #0 was recently fixed, comment #5 is not (not noticing that the writes in the loop are dead), and comment #6 asks for increasing the alignment of VLAs the same way we sometimes increase the alignment of arrays to help vectorization.
