[Alignment][NFC] Optimize alignTo

Summary: A small optimization suggested by jakehehrlich@ in D64790.

Reviewers: jakehehrlich, courbet

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69023

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375000 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed