[Bug tree-optimization/123958] [16 regression] ice in useless_type_conversion_p, at gimple-expr.cc:85 since r16-7264-ga70bdd86984c0b6cd8520e30ec713e3101c5d45f

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123958

--- Comment #14 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Another (C++) reduced testcase with a slightly difference ICE but the same
issue of defer FMA creation with the POW builtin:
```
void a(double);
double b, d;
int c[1];
void e() {
  for (int f : c)
    if (f)
      d = f;
  double g = __builtin_pow(b, 2);
  a(d + g);
}
```