[PATCH] D66199: [docs] loop pragmas
Michael Kruse via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Wed Aug 14 09:41:10 PDT 2019
Meinersbur added a comment.
Since this is user documentation, we should only add it here once it is true.
Comment at: docs/LanguageExtensions.rst:3068-3069
+There are loop hints that control transformations (e.g. vectorization, loop
+unrolling) and there loop hints that set transformation options (e.g.
+``vectorize_width``, ``unroll_count``). Pragmas setting transformation options
`vectorize_width` also "controls" a transformation. Is it that in our interpretation, `vectorize(enable)` overrides the profitability heuristic by taking out the "do not apply at all" option without setting any other option?
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