hfinkel added a comment. In https://reviews.llvm.org/D25403#580444, @jlebar wrote:
> //Let "CE" mean "constexpr-evaluatable". // > > libc++ attempts to be backwards-compatible with old versions of clang, right? Yea, we'd need to ifdef the test for older versions of Clang. I've just summarized my overall proposal in a previous comment. > Old versions of clang are going to fail, since the builtin will not be CE. > Is the idea to write a test that checks that, if `__builtin_isfinite` is CE, > then `__libcpp_isfinite` is also CE? AIUI you can only test CE-ness by > detecting a compile failure failure. > > So is the idea that we would have a shell script that tries to compile a > file, checking for CE-ness of the builtins, and, if and only if that > succeeds, then checks for CE-ness of __libcpp_isfinite? https://reviews.llvm.org/D25403 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
