[Bug tree-optimization/114273] New: `PHI(a, MIN(b, c)) < c` is not optimized to just `PHI(a,b) < c`

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114273
            Bug ID: 114273
           Summary: `PHI(a, MIN(b, c)) < c` is not optimized to just
                    `PHI(a,b) < c`
           Product: gcc
           Version: 14.0
            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: ---

Take:
```
void dummy(void);
bool f(unsigned a, unsigned b, bool c)
{
        unsigned ind = b;
        if (c)
        {
                dummy();
                ind = a > 6 ? 6 : a;
        }
        return ind < 6;
}
bool f2(unsigned a, unsigned b, bool c)
{
        unsigned ind = b;
        if (c)
        {
                dummy();
                ind = a;
        }
        return ind < 6;
}
```

GCC should be able to remove the MIN_EXPR in f.
Note GCC is able to optimize `MIN_EXPR<a,b> < b`  since
r14-3922-g06bedc3860d3e6 .

This seems like PRE is the place for this kind of optimization but I am not
100% sure.