https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110007
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Richard Yao from comment #0) > Having the ability to specify __builtin_unpredictable() as a hint to > encourage the compiler to use cmov would be useful for implementing > algorithms like binary search that have unpredictable branches. > __builtin_expect_with_probability() looks like a possible substitute, but > Clang does not support it and it does not always work as described in > #110001. PR 110001 has nothing to do with __builtin_expect_with_probability and __builtin_expect_with_probability will do exactly the same as __builtin_unpredictable will do really.
