jlebar added a comment. //Let "CE" mean "constexpr-evaluatable". //
libc++ attempts to be backwards-compatible with old versions of clang, right? 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
