https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114433
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:4a46a48ebc7b7b3976af49f6f8dabd65c6ddf64b commit r14-9641-g4a46a48ebc7b7b3976af49f6f8dabd65c6ddf64b Author: Jakub Jelinek <ja...@redhat.com> Date: Sat Mar 23 11:20:00 2024 +0100 bitint: Fix bitfield loads in handle_cast [PR114433] We ICE on the following testcase, because handle_cast was incorrectly testing !m_first to see whether it should use m_data[m_bitfld_load + 1] or fresh SSA_NAME for a PHI result. Now, m_first is in the routine sometimes temporarily cleared in between doing prepare_data_in_out and the !m_first check and only before returning restored from the save_first copy. Without this patch, we try to use the same SSA_NAME (_12 here) in 2 different PHI results which is obviously invalid IL and ICEs very quickly. 2024-03-23 Jakub Jelinek <ja...@redhat.com> PR tree-optimization/114433 * gimple-lower-bitint.cc (bitint_large_huge::handle_cast): For m_bitfld_load check save_first rather than m_first. * gcc.dg/torture/bitint-68.c: New test.
