[Bug tree-optimization/121405] [13/14/15/16 Regression] Another missed VN via a copy (but via an int copy)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121405

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 62053
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62053&action=edit
old patch

I think this one, originally done for PR92645, but there's a related one for
PR93507.