> As a first step, to stay on conservative side, it makes sense > consider the scalar cost of smaller block while calculating scalar cost. > Note, smaller block may not exist.
I think that this should be considwered quite common. We should base the weights of the costs of the two blocks on branch probability and predictability. However, one tm interface we are currently missing is one to describe the branch cost as dependent on the branch probability. If a branch is taken most of the time, it should be well predictable, so its cost should be low on targets that have cheap predictable branches.
