[Bug tree-optimization/92130] Missed vectorization for iteration dependent loads and simple multiplicative accumulators

[witold.baryluk+gcc at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92130

--- Comment #5 from Witold Baryluk <witold.baryluk+gcc at gmail dot com> ---
As a bonus:


static float perlin1d(float x) {
  float accum = 0.0f;
  for (int i = 0; i < 8; i++) {
    accum += powf(0.781f, i) * sinf(x * powf(2.131f, i));
  }
  return accum;
}


claims to be vectorized, but really isn't, and has non inline or lowered calls
to sinf and expf_finite.