https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69669
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 37581 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37581&action=edit gcc6-pr69669.patch The bug seems to be in the C FE. If it decides to honor the precision from mode attribute, it should make sure the TYPE_MIN_VALUE/TYPE_MAX_VALUE values are correct for that precision.