https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101706

            Bug ID: 101706
           Summary: bool0^bool1^1 -> bool0 == bool1
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

void fa(bool &a, bool &b, bool &c)
{
    c= a==b;
}
void fb(bool &a, bool &b, bool &c)
{
    int t = (a^b);
    c= (t^1);
}

I don't know how often this shows up but I am putting this here for
completeness.

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