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Add BOOST_CONTAINER_ENABLE_SEGMENTED_LOOP_UNROLLING / BOOST_CONTAINER_DISABLE_SEGMENTED_LOOP_UNROLLING options to easier test unrolling.

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Ion Gaztañaga
2026-03-29 22:56:47 +02:00
parent 57e95d43a7
commit 530b41dad9
1 changed files with 15 additions and 3 deletions
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include/boost/container/experimental/segmented_iterator_traits.hpp
+15 -3
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@@ -146,10 +146,22 @@ struct is_sentinel<Iter, Iter>
#include <boost/container/detail/config_end.hpp>
#define BOOST_CONTAINER_DISABLE_SEGMENTED_LOOP_UNROLLING
//#define BOOST_CONTAINER_ENABLE_SEGMENTED_LOOP_UNROLLING
//#define BOOST_CONTAINER_DISABLE_SEGMENTED_LOOP_UNROLLING
#ifndef BOOST_CONTAINER_DISABLE_SEGMENTED_LOOP_UNROLLING
#define BOOST_CONTAINER_SEGMENTED_LOOP_UNROLLING
#if defined(BOOST_CONTAINER_ENABLE_SEGMENTED_LOOP_UNROLLING) && defined(BOOST_CONTAINER_DISABLE_SEGMENTED_LOOP_UNROLLING)
#error "Cannot define both BOOST_CONTAINER_ENABLE_SEGMENTED_LOOP_UNROLLING and BOOST_CONTAINER_DISABLE_SEGMENTED_LOOP_UNROLLING"
#elif !defined(BOOST_CONTAINER_ENABLE_SEGMENTED_LOOP_UNROLLING) && !defined(BOOST_CONTAINER_DISABLE_SEGMENTED_LOOP_UNROLLING)
//Disable loop unrolling for clang, which generates suboptimal code in some case as clang auto-vectorizes
//loops more aggressively than other compilers, and loop unrolling can interfere with this optimization.
#if !defined(BOOST_CLANG)
#define BOOST_CONTAINER_SEGMENTED_LOOP_UNROLLING
#endif
#elif defined(BOOST_CONTAINER_ENABLE_SEGMENTED_LOOP_UNROLLING)
//Force loop unrolling
#define BOOST_CONTAINER_SEGMENTED_LOOP_UNROLLING
#else //defined(BOOST_CONTAINER_DISABLE_SEGMENTED_LOOP_UNROLLING)
// Force no loop unrolling
#endif
#endif // BOOST_CONTAINER_EXPERIMENTAL_SEGMENTED_ITERATOR_TRAITS_HPP