Author: sjoerdmeijer Date: Mon Oct 14 00:40:36 2019 New Revision: 374756 URL: http://llvm.org/viewvc/llvm-project?rev=374756&view=rev Log: [docs] loop pragmas: options implying transformations
Following our discussion on the cfe dev list: http://lists.llvm.org/pipermail/cfe-dev/2019-August/063054.html, I have added a paragraph that is explicit about loop pragmas, and transformation options implying the corresponding transformation. Differential Revision: https://reviews.llvm.org/D66199 Modified: cfe/trunk/docs/LanguageExtensions.rst Modified: cfe/trunk/docs/LanguageExtensions.rst URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/LanguageExtensions.rst?rev=374756&r1=374755&r2=374756&view=diff ============================================================================== --- cfe/trunk/docs/LanguageExtensions.rst (original) +++ cfe/trunk/docs/LanguageExtensions.rst Mon Oct 14 00:40:36 2019 @@ -3027,6 +3027,14 @@ provides options for vectorization, inte distribution. Loop hints can be specified before any loop and will be ignored if the optimization is not safe to apply. +There are loop hints that control transformations (e.g. vectorization, loop +unrolling) and there are loop hints that set transformation options (e.g. +``vectorize_width``, ``unroll_count``). Pragmas setting transformation options +imply the transformation is enabled, as if it was enabled via the corresponding +transformation pragma (e.g. ``vectorize(enable)``). If the transformation is +disabled (e.g. ``vectorize(disable)``), that takes precedence over +transformations option pragmas implying that transformation. + Vectorization, Interleaving, and Predication -------------------------------------------- _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
