Re: [PR] GH-39413: [C++][Parquet] Vectorize decode plain on FLBA [arrow]

["mapleFU (via GitHub)" <gi...@apache.org>]

mapleFU commented on PR #39414:
URL: https://github.com/apache/arrow/pull/39414#issuecomment-1873587330

   ```
   <source>:18:3: remark: loop not vectorized: value that could not be identified as reduction is used outside the loop [-Rpass-analysis=loop-vectorize]
      18 |   for (int i = 0; i < num_values; ++i) {
         |   ^
   <source>:18:3: remark: loop not vectorized [-Rpass-missed=loop-vectorize]
   ```
   
   
   With `-Rpass-analysis=loop-vectorize -Rpass=loop-vectorize -Rpass-missed=loop-vectorize`, the compiler reports why loop doesn't get vectorized


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