https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84280
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> --- Hmm, the preprocessed source(s) are hard to work with given the eigen headers seem to have conditional code on the enabled ISAs. >From a quick look it seems to be inlining related? My past experience says that compute kernels in C++ should have the flatten attribute attached to them... Did you try with FDO? (-fprofile-generate, run, -fprofile-use)
