https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77468
--- Comment #31 from PeteVine <tulipawn at gmail dot com> --- Indeed, that was it! I've probably found the source of my A53 issues: http://openbenchmarking.org/result/1703040-RI-CRAYERRAT99 This means comment #29 exposes a different issue and Cortex A53 codegen still is suboptimal.