[Bug tree-optimization/122040] -fisolate-erroneous-paths-dereference turns division by zero into a trap but the behavior is undocumented

[xry111 at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122040

--- Comment #1 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
I'm unsure if there are more undocumented code patterns causing
-fisolate-erroneous-paths-dereference to produce ud2.