[Bug rtl-optimization/64713] New: Missed ccmp optimization

[rth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64713

            Bug ID: 64713
           Summary: Missed ccmp optimization
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rth at gcc dot gnu.org

In a small percentage of ccmp uses within the stage3 cc1plus I see

  56b638:       f100045f        cmp     x2, #0x1
  56b63c:       fa421320        ccmp    x25, x2, #0x0, ne
  56b640:       1a9f17e3        cset    w3, eq
  56b644:       350001c3        cbnz    w3, ...

This is a reminder to dig those out as test cases and see if we can
eliminate the cset.