https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90106
JunMa <JunMa at linux dot alibaba.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |JunMa at linux dot alibaba.com --- Comment #7 from JunMa <JunMa at linux dot alibaba.com> --- yes, the transformation in CDEC prevent the tail call optimization. let's check the return stmt in CDEC pass.