https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66127
--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- Ideally the front-end folding of expressions-of-constants might avoid folding-for-optimization such as this (instead just folding cases where the evaluated operands are actually constants, so not folding anything where 1 / 0 is an evaluated operand).
