https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88842
--- Comment #1 from ptdrnvqd at 10mail dot org --- from retweet danluu ↓ https://twitter.com/johnregehr/status/923682400676093952 not every day you run across a … easy optimization missing from all of LLVM, GCC, and Intel CC… ↓ http://lists.llvm.org/pipermail/llvm-dev/2017-October/118476.html [llvm-dev] [PATCH/RFC] Modifying reassociate for improved CSE: … perf gains >> “…several people asked if this is safe; here's how LLVM safely reassociates >> addition with undefined signed overflow…” i dont know to what degree is track their development/findings or was this only llvm-side >> “… to convince another person that reassociate is a safe pass…” also may this apply outside of -ffast-math? for GCC? also i dont know what version, it was over a year ago
