https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88234
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Thu Nov 29 14:23:21 2018 New Revision: 266619 URL: https://gcc.gnu.org/viewcvs?rev=266619&root=gcc&view=rev Log: PR target/88234 * config/rs6000/rs6000.c (rs6000_gimple_fold_builtin): For vec_add and vec_sub builtins, perform PLUS_EXPR or MINUS_EXPR in unsigned_type_for instead of vector integral type where overflow doesn't wrap. * gcc.dg/ubsan/pr88234.c: New test. Added: trunk/gcc/testsuite/gcc.dg/ubsan/pr88234.c Modified: trunk/gcc/ChangeLog trunk/gcc/config/rs6000/rs6000.c trunk/gcc/testsuite/ChangeLog