[Bug tree-optimization/95731] New: Faiilure to optimize a >= 0 && b >= 0 to (a | b) >= 0

[gabravier at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95731

            Bug ID: 95731
           Summary: Faiilure to optimize a >= 0 && b >= 0 to (a | b) >= 0
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gabravier at gmail dot com
  Target Milestone: ---

bool f(int a, int b)
{
    return a >= 0 && b >= 0;
}

This can be optimized to `return (a | b) >= 0;`. LLVM does this transformation,
but GCC does not.