[Bug tree-optimization/126087] New: `MIN >= 0` is not simplified into `a >= 0`

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126087

            Bug ID: 126087
           Summary: `MIN<nonnegative,a> >= 0` is not simplified into `a >=
                    0`
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Keywords: missed-optimization, TREE
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Take:
```
void use();
void f2(int a, unsigned short bb) {
    int b = bb;
    int m = a < b ? a : b;
    if (m >= 0) use();
}


void f3(int a, unsigned short bb) {
    int b = bb;
    int m = a|b;
    if (m >= 0) use();
}

```

Both  of these should be optimized to just `if (a >= 0) use();`.
Currently f3 is optimized to that on the RTL level for some targets.

for < 0, the same is true.