flyingforyou added a comment. Test Env: CPU: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz F1567056: x86_div-cmp-heuristic_testresult.csv <http://reviews.llvm.org/F1567056> I didn't find notable regression on SPEC/test-suite http://reviews.llvm.org/D17288