[Bug rtl-optimization/78559] [7 Regression] wrong code due to tree if-conversion?

[bernds at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78559

--- Comment #11 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Looks like other_insn is only used for cases where we rewrite cc sets in this
way, so Bin's patch does look reasonably narrow. We could maybe record the CC
reg being changed and only discard reg notes, but in my testing I've not been
able to produce code generation differences except for the testcase. Let's wait
for Segher's testing, but I think the patch is OK.