Untabify and whitespace cleanups.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220771 91177308-0d34-0410-b5e6-96231b3b80d8
LoopRerollPass.cpp: Use range-based loop. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220772 91177308-0d34-0410-b5e6-96231b3b80d8
Reformat partially, where I touched for whitespace changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220773 91177308-0d34-0410-b5e6-96231b3b80d8