hfinkel added a comment. In http://reviews.llvm.org/D11108#203113, @jingyue wrote: > Hal, I didn't change `TargetTransformInfoImplBase::getNumberOfRegisters` because many tests under `LoopVectorize` depends on `NoTTI` to have vector registers. Yea, I figured it was not testable ;) http://reviews.llvm.org/D11108