Remove extraneous braces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186212 91177308-0d34-0410-b5e6-96231b3b80d8
Cleanup: rename a variable to make the logic easier to follow.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186213 91177308-0d34-0410-b5e6-96231b3b80d8
Cleanup LFTR logic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186214 91177308-0d34-0410-b5e6-96231b3b80d8
LFTR improvement to avoid truncation.

This is a reimplemntation of the patch originally in r186107.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186215 91177308-0d34-0410-b5e6-96231b3b80d8