[PATCH] D12249: Remove the final bit test during lowering switch statement if all cases in bit test cover a contiguous range.

[David Li via llvm-commits]

davidxl added a comment.

I think it should be an optimization that always wins -- the following conditions need to be satisfied:

1. value range is continuous AND
2. min == 0 OR the value range is outside 64 (or whatever largest width supported by the target)


http://reviews.llvm.org/D12249