Reminds me of LLVM&#x27;s EfficiencySanitizer that will probably land in 3.9: <a href="http:&#x2F;&#x2F;lists.llvm.org&#x2F;pipermail&#x2F;llvm-dev&#x2F;2016-April&#x2F;098355.html" rel="nofollow">http:&#x2F;&#x2F;lists.llvm.org&#x2F;pipermail&#x2F;llvm-dev&#x2F;2016-April&#x2F;098355.h...</a>