https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104472
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-10 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:f755dd4bda6cb1ae5c6d8e9c3a285faea236d3c3 commit r10-10677-gf755dd4bda6cb1ae5c6d8e9c3a285faea236d3c3 Author: Jakub Jelinek <ja...@redhat.com> Date: Fri Feb 11 13:52:44 2022 +0100 c++: Fix up constant expression __builtin_convertvector folding [PR104472] The following testcase ICEs, because due to the -frounding-math fold_const_call fails, which is it returns NULL, and returning NULL from cxx_eval* is wrong, all the callers rely on them to either return folded value or original with *non_constant_p = true. The following patch does that, and additionally falls through into the default case where there is diagnostics for the !ctx->quiet case too. 2022-02-11 Jakub Jelinek <ja...@redhat.com> PR c++/104472 * constexpr.c (cxx_eval_internal_function) <case IFN_VEC_CONVERT>: Only return fold_const_call result if it is non-NULL. Otherwise fall through into the default: case to return t, set *non_constant_p and emit diagnostics if needed. * g++.dg/cpp0x/constexpr-104472.C: New test. (cherry picked from commit 84993d94e13ad2ab3aee151bb5a5e767cf75d51e)
