https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120223
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jeff Law <l...@gcc.gnu.org>: https://gcc.gnu.org/g:87d0daab1ec9d5c901295e8045cbd67f80b2fa23 commit r16-655-g87d0daab1ec9d5c901295e8045cbd67f80b2fa23 Author: Jeff Law <j...@ventanamicro.com> Date: Thu May 15 09:03:13 2025 -0600 [RISC-V][PR target/120223] Don't use bset/binv for XTHEADBS Thead has the XTHEADBB extension which has a lot of overlap with Zbb. I made the incorrect assumption that XTHEADBS would largely be like Zbs when generalizing Shreya's work. As a result we can't use the operation synthesis code for IOR/XOR because we don't have binv/bset like capabilities. I should have double checked on XTHEADBS, my bad. Anyway, the fix is trivial. Don't allow bset/binv based on XTHEADBS. Already spun in my tester. Spinning in the pre-commit CI system now. PR target/120223 gcc/ * config/riscv/riscv.cc (synthesize_ior_xor): XTHEADBS does not have single bit manipulations. gcc/testsuite/ * gcc.target/riscv/pr120223.c: New test.
