Scott Meyers <NeverRead@xxxxxxxxxxxx> writes: > What has more weight during codegen in a compilation with > -fprofile-use when the code uses __builtin_expect to favor one branch > while the PGO data says the other branch is more likely? I believe the probabilities will be combined in that case. The weighting of __builtin_expect is such that it will most likely be the predicted case, unless the profiling data says that the unexpected path is always taken. Ian
