[Bug target/112454] New: csinc (csel is though) is not being used when there is matches twice

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112454

            Bug ID: 112454
           Summary: csinc (csel is though) is not being used when there is
                    matches twice
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64

Take:
```
int f(int a, int b, int c, int d)
{
  return (a == 2 ? 1 : b) + (c == 3 ? 1 : d);
}
```

GCC produces:
```
        cmp     w0, 2
        mov     w4, 1
        csel    w0, w1, w4, ne
        cmp     w2, 3
        csel    w3, w3, w4, ne
        add     w0, w0, w3
```


But that `mov w4, 1` is useless if we use csinc .