https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111972
--- Comment #16 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Andrew Pinski <pins...@gcc.gnu.org>: https://gcc.gnu.org/g:886f256ce3be4aa85f30af88558f0dfcb8003300 commit r14-6126-g886f256ce3be4aa85f30af88558f0dfcb8003300 Author: Andrew Pinski <quic_apin...@quicinc.com> Date: Sat Nov 11 20:33:28 2023 -0800 MATCH: Fix zero_one_valued_p's convert pattern While working on PR 111972, I was getting a regression due to zero_one_valued_p matching a signed 1 bit integer when it came to convert. This patch fixes that by checking the outer type too. Bootstrapped and tested on x86_64-linux-gnu with no regressions. gcc/ChangeLog: * match.pd (zero_one_valued_p): For convert make sure type is not a signed 1-bit integer. Signed-off-by: Andrew Pinski <quic_apin...@quicinc.com>