[Bug tree-optimization/123120] phiprop does not always work

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123120

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Shorter testcase:
```
#include <algorithm>

int f0(int sum0)
{
   return std::max(0, std::min(127, sum0));
}

int f1(int sum0)
{
   return std::max(std::min(127, sum0), 0);
}
```