[Bug target/85978] New: config/frv/frv.c: 3 * iffy code in switch

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85978

            Bug ID: 85978
           Summary: config/frv/frv.c: 3 * iffy code in switch
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---
            Target: frv

gcc/config/frv/frv.c:6715:7: warning: this statement may fall through
[-Wimplicit-fallthrough=]
gcc/config/frv/frv.c:6741:7: warning: this statement may fall through
[-Wimplicit-fallthrough=]
gcc/config/frv/frv.c:6766:7: warning: this statement may fall through
[-Wimplicit-fallthrough=]

Source code for the first one is

      switch (to)
        {
        default:
          break;

Instead merely carrying on with the code after the switch,
and going into the next case for the outer switch,
perhaps better code would flag up in some way the unexpected
value of "to" ?