https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79460
--- Comment #1 from Raphael C <drraph at gmail dot com> --- After some experimentation (also carried out by Hagen von Eitzen), it seems that any limit of at least 72 which is also a multiple of 4 causes the same optimisation problem. That is the loop is *not* optimised out in these cases. Perhaps this is an example of one optimisation (SIMD vectorisation) conflicting with another?
