This reverts commit 024115ab14822a97c09adcd2545c14e78b843b36.
I suspect that this may be causing some buildbot bootstrapping failures.
Revert while I investigate.
Extend the NUW/NSW inference logic add in 72121a20cd and cdeaf5f28c3dc
to all overflowing binary operators.
Reviewed By: nikic
Differential Revision: https://reviews.llvm.org/D142721