https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91275
--- Comment #7 from Lauri Kasanen <cand at gmx dot com> --- Thanks for working on this. Per my experience, this is fast for gcc ;) Are you sure about the smaller ones? To me they should not care about 64-bit swaps, but clang lists them all as lane-sensitive: https://llvm.org/doxygen/PPCVSXSwapRemoval_8cpp_source.html Also, I'd like to ask if any other instructions added at the same time were affected, just in case; the test suite did not catch this. Will the patch be backported to stable branches? What would you recommend as a workaround for existing gcc versions?