David Majnemer c5601df9fd Reapply "[LoopIdiom] Don't remove dead operands manually"
This reverts commit r273160, reapplying r273132.
RecursivelyDeleteTriviallyDeadInstructions cannot be called on a
parentless Instruction.

llvm-svn: 273162
2016-06-20 16:03:25 +00:00
..