[PATCH] D12603: Use fixed-point representation for BranchProbability

[Cong Hou via llvm-commits]

congh added a comment.

In http://reviews.llvm.org/D12603#239967, @chapuni wrote:

> Could we introduce fixed-point arithmetic class for general use?
>  (It'd be not urgent)


Sorry for the late reply! Do we need such a class in LLVM? Except BlockMass, do we have other usages or demands of fixed-point class? If yes, it is not difficult to abstract such a class from the new BranchProbability in this patch.


http://reviews.llvm.org/D12603