https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24574
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> --- Makes sense, I don't know why I didn't add divisions in the original patch. *_MOD_EXPR, shifts and rotates should work as well with 0 on the left, max with INT_MAX, etc, I was quite minimalist there. Of course, if I had gone with the simpler approach of folding the operation after replacement (here 0 / 10) and comparing that with the PHI argument, we wouldn't need the neutral/absorbing logic at all :-(
