[Bug tree-optimization/121405] New: Another missed VN via a copy (but via an int copy)

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

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

            Bug ID: 121405
           Summary: Another missed VN via a copy (but via an int copy)
           Product: gcc
           Version: 14.2.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64

Created attachment 62046
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62046&action=edit
testcase

See attached testcase.
Compiling on x86_64 we don't just get `return t0+t1`;

This is exacted from highway's EMU128 implementation.