[Bug tree-optimization/93080] insert of an extraction on the same location is not optimized

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93080

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
The testcase in the description is fixed, comment#2 and comment#4 are not.