Merge remote-tracking branch 'upstream/master' into more-assume

GridTools · Jun 24, 2024 · c0e7999 · c0e7999
2 parents a41776a + f489c51
commit c0e7999
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diff --git a/include/gridtools/fn/unstructured.hpp b/include/gridtools/fn/unstructured.hpp
@@ -70,8 +70,9 @@ namespace gridtools::fn {
             int m_index;
         };
 
+        /// gnu::pure attribute is necessary to enable __builtin_assume() optimization with Clang
         template <class Tag, class Ptr, class Strides, class Domain>
-        GT_FUNCTION constexpr bool can_deref(iterator<Tag, Ptr, Strides, Domain> const &it) {
+        [[gnu::pure]] GT_FUNCTION constexpr bool can_deref(iterator<Tag, Ptr, Strides, Domain> const &it) {
             return it.m_index != -1;
         }