https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99663
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Vladimir Makarov <vmaka...@gcc.gnu.org>: https://gcc.gnu.org/g:d81019db099ad95febbb2d4b4afd8cbe95762062 commit r11-7741-gd81019db099ad95febbb2d4b4afd8cbe95762062 Author: Vladimir N. Makarov <vmaka...@redhat.com> Date: Fri Mar 19 15:34:48 2021 -0400 [PR99663] Don't use unknown constraint for address constraint in process_address_1. s390x has insns using several alternatives with address constraints. Even if we don't know at this stage what alternative will be used, we still can say that is an address constraint. So don't use unknown constraint in this case when there are multiple constraints or/and alternative. gcc/ChangeLog: PR target/99663 * lra-constraints.c (process_address_1): Don't use unknown constraint for address constraint. gcc/testsuite/ChangeLog: PR target/99663 * gcc.target/s390/pr99663.c: New.