[Bug tree-optimization/116008] New: MAX should simplify to MAX+i

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116008

            Bug ID: 116008
           Summary: MAX<i+j, i+k> should simplify to MAX<j,k>+i
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

I noticed this while reading PR 102951 and seeing what can be done better.

Take:
```
int g(int i, int j, int k)
{
        int t = i+j;
        int t1 = i+k;
        return t > t1;
}

int f(int i, int j, int k)
{
        int t = i+j;
        int t1 = i+k;
        return t > t1 ? t : t1;
}
int f1(int i, int j, int k)
{
        int t = i+j;
        int t1 = i+k;
        return i+(t > t1 ? j : k);
}
```

We can optimize just find g to `j > k`; but f does not get optimized to f1.