https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118878
--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Georg-Johann Lay <g...@gcc.gnu.org>: https://gcc.gnu.org/g:1dc4e220ca2272d668ddb3041ccd9e69b968e532 commit r15-7544-g1dc4e220ca2272d668ddb3041ccd9e69b968e532 Author: Georg-Johann Lay <a...@gjlay.de> Date: Fri Feb 14 18:53:29 2025 +0100 AVR: target/118878 - Don't ICE on result from paradoxical reg's alloc. After register allocation, paradoxical subregs may become something like r20:SI += r22:SI which doesn't make much sense as assembly code. Hence avr_out_plus_1() used to ICE on such code. However, paradoxical subregs appear to be a common optimization device (instead of proper mode demotion). PR target/118878 gcc/ * config/avr/avr.cc (avr_out_plus_1): Don't ICE on result of paradoxical reg's register allocation. gcc/testsuite/ * gcc.target/avr/torture/pr118878.c: New test.
