[Bug middle-end/84016] [8 Regression] Spec2000 regression around Jan 14 and Jan 19 2018

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84016

--- Comment #8 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Reading the log, it gamess regression at 14th should not be gather/scatter
because it reproduces on zen2 where we disable them.

About the 19th regression, it would be nice to also bisect it (hopefully it
will reproduce with -flto as discussed earlier). The reason is that it
reproduces at ia64 even with profile feedback
https://gcc.opensuse.org/gcc-old/SPEC/CFP/sb-terbium-head-64-FDO/recent.html
which seems to disprove the likely suspect that it is a result of predictor
changes from that day (mostly disproves: predictors still do affect FDO path
but it is unlikely they affect it importantly unless there is other bug)