[LIR] Run clang-format over LoopIdiomRecognize in preparation for

a significant code cleanup here.

The handling of analyses in this pass is overly complex and can be
simplified significantly, but the right way to do that is to simplify
all of the code not just the analyses, and that'll require pretty
extensive edits that would be noisy with formatting changes mixed into
them.

llvm-svn: 244828