[Bug tree-optimization/112752] `~a - MIN<MIN<~a, ~b>, ~c>` is not optimized to `MAX<MAX<a,b>,c> - a`

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112752

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is a semi-reduced testcase:
```
#define byte unsigned char
#define MIN(a, b) ((a) > (b)?(b):(a))

byte hh(byte r, byte g, byte b) {
  byte c = 255 - r;
  byte m = 255 - g;
  byte y = 255 - b;
  byte tmp = MIN(m, y);
  byte k = MIN(c, tmp);
  return m - k;
}
```
Note matching this directly, the above might not fix the original testcase.