File is renamed to LoopSimplify.cpp

llvm-svn: 9059

llvm/lib/Transforms/Scalar/LoopSimplify.cpp

-//===- LoopPreheaders.cpp - Loop Canonicalization Pass --------------------===//
+//===- LoopSimplify.cpp - Loop Canonicalization Pass ----------------------===//
 //
 // This pass performs several transformations to transform natural loops into a
 // simpler form, which makes subsequent analyses and transformations simpler and