https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119989
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-15 branch has been updated by Georg-Johann Lay <g...@gcc.gnu.org>: https://gcc.gnu.org/g:e268cb27332a1c39a5fc8426ae368c9878f3f241 commit r15-9602-ge268cb27332a1c39a5fc8426ae368c9878f3f241 Author: Georg-Johann Lay <a...@gjlay.de> Date: Wed Apr 30 08:43:51 2025 +0200 AVR: target/119989 - Add missing clobbers to xload_<mode>_libgcc. libgcc's __xload_1...4 is clobbering Z (and also R21 is some cases), but avr.md had clobbers of respective GPRs only up to reload. Outcome was that code reading from the same __memx address twice could be wrong. This patch adds respective clobbers. Forward-port from 2025-04-30 r14-11703 PR target/119989 gcc/ * config/avr/avr.md (xload_<mode>_libgcc): Clobber R21, Z. gcc/testsuite/ * gcc.target/avr/torture/pr119989.h: New file. * gcc.target/avr/torture/pr119989-memx-1.c: New test. * gcc.target/avr/torture/pr119989-memx-2.c: New test. * gcc.target/avr/torture/pr119989-memx-3.c: New test. * gcc.target/avr/torture/pr119989-memx-4.c: New test. * gcc.target/avr/torture/pr119989-flashx-1.c: New test. * gcc.target/avr/torture/pr119989-flashx-2.c: New test. * gcc.target/avr/torture/pr119989-flashx-3.c: New test. * gcc.target/avr/torture/pr119989-flashx-4.c: New test. (cherry picked from commit 1ca1c1fc3b58ae5e1d3db4f5a2014132fe69f82a)
