https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110007
Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |hubicka at gcc dot gnu.org
--- Comment #7 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Also note that branch predicted with 50% outcome is not necessarily
unpredictable for example in this:
for (int i = 0; i < 10000; i++)
if (i&1)
....
I would expect branch predictor to work this out on modern systems.
So having explicit flag in branch_probability that given probability is hard
for CPU to predict would make sense and I was thinking we may try to get this
info from auto-fdo eventually too.
