[Bug rtl-optimization/105231] [12 Regression] ICE: in rtl_verify_bb_insns, at cfgrtl.cc:2797 (flow control insn inside a basic block) with custom flags since r12-4767-g81342e95827f77c0

[ebotcazou at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105231

--- Comment #13 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Oh, and checking for REG_EQUAL notes on i2/i3 doesn't work since they do not
> exist there.  Likewise REG_EQUAL notes can be simply dropped which would
> make the IL "invalid" so I think what purge_dead_edges does is premature?

Everything is consistent until combine messes things up, so I'd rather find a
fix/kludge in combine if possible.  Penalizing everyone because of an
artificial testcase exercising a nonsensical set of options is IMO not the way
to go.