[Bug tree-optimization/98984] New: Failure to optinize out float conversion from long long->float->char conversion

[gabravier at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98984

            Bug ID: 98984
           Summary: Failure to optinize out float conversion from long
                    long->float->char conversion
           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: ---

char f(unsigned long long n)
{
    return (float)n;
}

This can be optimized to `return n;`. This transformation is done by LLVM, but
not by GCC.