https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112540
David Binderman <dcb314 at hotmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |uros at gcc dot gnu.org --- Comment #2 from David Binderman <dcb314 at hotmail dot com> --- On the current bisection range, the only i386 change is this one: commit b42a09b258c3ed8d1368e0ef0948034dcf0f8ac9 Author: Uros Bizjak <ubiz...@gmail.com> Date: Tue Nov 14 18:34:43 2023 +0100 i386: Generate strict_low_part QImode insn with high input register So that is a likely candidate. Adding Uros for their opinion.