efriedma added a comment. > I'm concerned about constant folding not taking into account runtime rounding > mode
Changing the rounding mode is UB without FENV_ACCESS. And with FENV_ACCESS, __builtin_convertvector should lower to @llvm.experimental.constrained.sitofp etc., which won't constant-fold. (llvm.experimental.constrained.sitofp doesn't actually exist yet, but I assume it will eventually get added.) Repository: rC Clang https://reviews.llvm.org/D46863 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
