search for: 7dbde9ca

..._____________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160404/7dbde9ca/attachment.html>

Hi, Clang is currently unable to constant fold calls to math.h functions such as logl(), expl() etc. The problem is that APFloat doesn't have these functions, so Clang is forced to rely on the host math library. Because long double isn't portable, we only ever query the host math library for double or float results. I can see three methods for allowing constant folding for types that