commit | 49782e59bd62d52b366a4b479062a9ed72132274 | [log] [tgz] |
---|---|---|
author | Louis Dionne <ldionne@apple.com> | Fri Jul 19 17:02:42 2019 +0000 |
committer | Copybara-Service <copybara-worker@google.com> | Tue Sep 01 14:43:55 2020 -0700 |
tree | 141f9fcd76aa438b99cebe4b2611a132714164f4 | |
parent | c31e2125999ecedce40e1bf0db45c31f35b48024 [diff] |
[libc++] Integrate the PSTL into libc++ Summary: This commit allows specifying LIBCXX_ENABLE_PARALLEL_ALGORITHMS when configuring libc++ in CMake. When that option is enabled, libc++ will assume that the PSTL can be found somewhere on the CMake module path, and it will provide the C++17 parallel algorithms based on the PSTL (that is assumed to be available). The commit also adds support for running the PSTL tests as part of the libc++ test suite. Reviewers: rodgert, EricWF Subscribers: mgorny, christof, jkorous, dexonsmith, libcxx-commits, mclow.lists, EricWF Tags: #libc Differential Revision: https://reviews.llvm.org/D60480 llvm-svn: 366593 GitOrigin-RevId: 910323e6676f813b28d1320b0d08ece270ee977d
Parallel STL is an implementation of the C++ standard library algorithms with support for execution policies, as specified in ISO/IEC 14882:2017 standard, commonly called C++17. The implementation also supports the unsequenced execution policy specified in Parallelism TS version 2 and proposed for the next version of the C++ standard in the C++ working group paper P1001. Parallel STL offers efficient support for both parallel and vectorized execution of algorithms. For sequential execution, it relies on an available implementation of the C++ standard library.
To use Parallel STL, you must have the following software installed:
unseq
and par_unseq
policies only have effect with compilers that support #pragma omp simd
or #pragma simd
.includes
, inplace_merge
, merge
, nth_element
, partial_sort
, partial_sort_copy
, set_difference
, set_intersection
, set_symmetric_difference
, set_union
, sort
, stable_partition
, stable_sort
, unique
.exclusive_scan
, inclusive_scan
, transform_exclusive_scan
, transform_inclusive_scan
shall be DefaultConstructible. A default constructed-instance of the initial value type shall be the identity element for the specified binary operation.max_element
, min_element
, minmax_element
, partial_sort
, partial_sort_copy
, sort
, stable_sort
the dereferenced value type of the provided iterators shall be DefaultConstructible.remove
, remove_if
, unique
the dereferenced value type of the provided iterators shall be MoveConstructible.copy_if
, inplace_merge
, partial_sort
, partial_sort_copy
, partition_copy
, remove
, remove_if
, rotate
, sort
, stable_sort
, unique
, unique_copy
.