[llvm-dev] On Multi-Exit Loop Vectorizer

[raghesh via llvm-dev]

Hi All,

RFC in [1] proposed to perform loop vectorization in presence of multiple
exits. I could find some patches [2, 3] essential for this that got
upstreamed.

Is the implementation ready to be used now? If not, will this be landed in
the near future?

When I tried with simple examples like the one below, vectorization was not
happening.

int foo(float *a, int n){
  int i;
  for (i=0;i<n;i++){
    if (a[i] == 0){
      break;
    }
  }
  return i;
}

[1] https://lists.llvm.org/pipermail/llvm-dev/2019-September/134998.html
[2] https://reviews.llvm.org/D66688
[3] https://reviews.llvm.org/D93317

Thanks and Regards,
------------------------------
Raghesh Aloor
AMD India Pvt. Ltd.
Bengaluru.
------------------------------
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