diff options
Diffstat (limited to 'clang/docs/OpenMPSupport.rst')
| -rw-r--r-- | clang/docs/OpenMPSupport.rst | 1324 |
1 files changed, 662 insertions, 662 deletions
diff --git a/clang/docs/OpenMPSupport.rst b/clang/docs/OpenMPSupport.rst index 61b5bab..10a8d09 100644 --- a/clang/docs/OpenMPSupport.rst +++ b/clang/docs/OpenMPSupport.rst @@ -1,662 +1,662 @@ -.. raw:: html
-
- <style type="text/css">
- .none { background-color: #FFCCCC }
- .part { background-color: #FFFF99 }
- .good { background-color: #CCFF99 }
- </style>
-
-.. role:: none
-.. role:: part
-.. role:: good
-
-.. contents::
- :local:
-
-==============
-OpenMP Support
-==============
-
-Clang fully supports OpenMP 4.5, almost all of 5.0 and most of 5.1/2.
-Clang supports offloading to X86_64, AArch64, PPC64[LE], NVIDIA GPUs (all models) and AMD GPUs (all models).
-
-In addition, the LLVM OpenMP runtime `libomp` supports the OpenMP Tools
-Interface (OMPT) on x86, x86_64, AArch64, and PPC64 on Linux, Windows, and macOS.
-OMPT is also supported for NVIDIA and AMD GPUs.
-
-For the list of supported features from OpenMP 5.0 and 5.1
-see `OpenMP implementation details`_ and `OpenMP 51 implementation details`_.
-
-General improvements
-====================
-- New collapse clause scheme to avoid expensive remainder operations.
- Compute loop index variables after collapsing a loop nest via the
- collapse clause by replacing the expensive remainder operation with
- multiplications and additions.
-
-- When using the collapse clause on a loop nest the default behavior
- is to automatically extend the representation of the loop counter to
- 64 bits for the cases where the sizes of the collapsed loops are not
- known at compile time. To prevent this conservative choice and use
- at most 32 bits, compile your program with the
- `-fopenmp-optimistic-collapse`.
-
-
-GPU devices support
-===================
-
-Data-sharing modes
-------------------
-
-Clang supports two data-sharing models for Cuda devices: `Generic` and `Cuda`
-modes. The default mode is `Generic`. `Cuda` mode can give an additional
-performance and can be activated using the `-fopenmp-cuda-mode` flag. In
-`Generic` mode all local variables that can be shared in the parallel regions
-are stored in the global memory. In `Cuda` mode local variables are not shared
-between the threads and it is user responsibility to share the required data
-between the threads in the parallel regions. Often, the optimizer is able to
-reduce the cost of `Generic` mode to the level of `Cuda` mode, but the flag,
-as well as other assumption flags, can be used for tuning.
-
-Features not supported or with limited support for Cuda devices
----------------------------------------------------------------
-
-- Cancellation constructs are not supported.
-
-- Doacross loop nest is not supported.
-
-- User-defined reductions are supported only for trivial types.
-
-- Nested parallelism: inner parallel regions are executed sequentially.
-
-- Debug information for OpenMP target regions is supported, but sometimes it may
- be required to manually specify the address class of the inspected variables.
- In some cases the local variables are actually allocated in the global memory,
- but the debug info may be not aware of it.
-
-
-.. _OpenMP implementation details:
-
-OpenMP 5.0 Implementation Details
-=================================
-
-The following table provides a quick overview over various OpenMP 5.0 features
-and their implementation status. Please post on the
-`Discourse forums (Runtimes - OpenMP category)`_ for more
-information or if you want to help with the
-implementation.
-
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-|Category | Feature | Status | Reviews |
-+==============================+==============================================================+==========================+=======================================================================+
-| loop | support != in the canonical loop form | :good:`done` | D54441 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop | #pragma omp loop (directive) | :part:`partial` | D145823 (combined forms) |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop | #pragma omp loop bind | :part:`worked on` | D144634 (needs review) |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop | collapse imperfectly nested loop | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop | collapse non-rectangular nested loop | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop | C++ range-base for loop | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop | clause: if for SIMD directives | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop | inclusive scan (matching C++17 PSTL) | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| memory management | memory allocators | :good:`done` | r341687,r357929 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| memory management | allocate directive and allocate clause | :good:`done` | r355614,r335952 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| OMPD | OMPD interfaces | :good:`done` | https://reviews.llvm.org/D99914 (Supports only HOST(CPU) and Linux |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| OMPT | OMPT interfaces (callback support) | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| thread affinity | thread affinity | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | taskloop reduction | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | task affinity | :part:`not upstream` | https://github.com/jklinkenberg/openmp/tree/task-affinity |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | clause: depend on the taskwait construct | :good:`done` | D113540 (regular codegen only) |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | depend objects and detachable tasks | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | mutexinoutset dependence-type for tasks | :good:`done` | D53380,D57576 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | combined taskloop constructs | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | master taskloop | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | parallel master taskloop | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | master taskloop simd | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | parallel master taskloop simd | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| SIMD | atomic and simd constructs inside SIMD code | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| SIMD | SIMD nontemporal | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | infer target functions from initializers | :part:`worked on` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | infer target variables from initializers | :good:`done` | D146418 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | OMP_TARGET_OFFLOAD environment variable | :good:`done` | D50522 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | support full 'defaultmap' functionality | :good:`done` | D69204 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | device specific functions | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | clause: device_type | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | clause: extended device | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | clause: uses_allocators clause | :good:`done` | https://github.com/llvm/llvm-project/pull/157025 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | clause: in_reduction | :part:`worked on` | r308768 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | omp_get_device_num() | :good:`done` | D54342,D128347 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | structure mapping of references | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | nested target declare | :good:`done` | D51378 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | implicitly map 'this' (this[:1]) | :good:`done` | D55982 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | allow access to the reference count (omp_target_is_present) | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | requires directive | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | clause: unified_shared_memory | :good:`done` | D52625,D52359 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | clause: unified_address | :part:`partial` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | clause: reverse_offload | :part:`partial` | D52780,D155003 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | clause: atomic_default_mem_order | :good:`done` | D53513 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | clause: dynamic_allocators | :part:`unclaimed parts` | D53079 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | user-defined mappers | :good:`done` | D56326,D58638,D58523,D58074,D60972,D59474 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | map array-section with implicit mapper | :good:`done` | https://github.com/llvm/llvm-project/pull/101101 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | mapping lambda expression | :good:`done` | D51107 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | clause: use_device_addr for target data | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | support close modifier on map clause | :good:`done` | D55719,D55892 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | teams construct on the host device | :good:`done` | r371553 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | support non-contiguous array sections for target update | :good:`done` | https://github.com/llvm/llvm-project/pull/144635 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | pointer attachment | :part:`being repaired` | @abhinavgaba (https://github.com/llvm/llvm-project/pull/153683) |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| atomic | hints for the atomic construct | :good:`done` | D51233 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| base language | C11 support | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| base language | C++11/14/17 support | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| base language | lambda support | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | array shaping | :good:`done` | D74144 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | library shutdown (omp_pause_resource[_all]) | :good:`done` | D55078 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | metadirectives | :part:`mostly done` | D91944, https://github.com/llvm/llvm-project/pull/128640 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | conditional modifier for lastprivate clause | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | iterator and multidependences | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | depobj directive and depobj dependency kind | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | user-defined function variants | :good:`done`. | D67294, D64095, D71847, D71830, D109635 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | pointer/reference to pointer based array reductions | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | prevent new type definitions in clauses | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| memory model | memory model update (seq_cst, acq_rel, release, acquire,...) | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-
-
-.. _OpenMP 51 implementation details:
-
-OpenMP 5.1 Implementation Details
-=================================
-
-The following table provides a quick overview over various OpenMP 5.1 features
-and their implementation status.
-Please post on the
-`Discourse forums (Runtimes - OpenMP category)`_ for more
-information or if you want to help with the
-implementation.
-
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-|Category | Feature | Status | Reviews |
-+==============================+==============================================================+==========================+=======================================================================+
-| atomic | 'compare' clause on atomic construct | :good:`done` | D120290, D120007, D118632, D120200, D116261, D118547, D116637 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| atomic | 'fail' clause on atomic construct | :part:`worked on` | D123235 (in progress) |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| base language | C++ attribute specifier syntax | :good:`done` | D105648 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | 'present' map type modifier | :good:`done` | D83061, D83062, D84422 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | 'present' motion modifier | :good:`done` | D84711, D84712 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | 'present' in defaultmap clause | :good:`done` | D92427 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | map clause reordering based on 'present' modifier | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | device-specific environment variables | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | omp_target_is_accessible routine | :good:`done` | https://github.com/llvm/llvm-project/pull/138294 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | omp_get_mapped_ptr routine | :good:`done` | D141545 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | new async target memory copy routines | :good:`done` | D136103 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | thread_limit clause on target construct | :part:`partial` | D141540 (offload), D152054 (host, in progress) |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | has_device_addr clause on target construct | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | iterators in map clause or motion clauses | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | indirect clause on declare target directive | :part:`In Progress` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | allow virtual functions calls for mapped object on device | :part:`partial` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | interop construct | :part:`partial` | parsing/sema done: D98558, D98834, D98815 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| device | assorted routines for querying interoperable properties | :part:`partial` | D106674 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop | Loop tiling transformation | :good:`done` | D76342 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop | Loop unrolling transformation | :good:`done` | D99459 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| loop | 'reproducible'/'unconstrained' modifiers in 'order' clause | :part:`partial` | D127855 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| memory management | alignment for allocate directive and clause | :good:`done` | D115683 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| memory management | 'allocator' modifier for allocate clause | :good:`done` | https://github.com/llvm/llvm-project/pull/114883 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| memory management | 'align' modifier for allocate clause | :good:`done` | https://github.com/llvm/llvm-project/pull/121814 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| memory management | new memory management routines | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| memory management | changes to omp_alloctrait_key enum | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| memory model | seq_cst clause on flush construct | :good:`done` | https://github.com/llvm/llvm-project/pull/114072 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | 'omp_all_memory' keyword and use in 'depend' clause | :good:`done` | D125828, D126321 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | error directive | :good:`done` | D139166 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | scope construct | :good:`done` | D157933, https://github.com/llvm/llvm-project/pull/109197 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | routines for controlling and querying team regions | :part:`partial` | D95003 (libomp only) |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | changes to ompt_scope_endpoint_t enum | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | omp_display_env routine | :good:`done` | D74956 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | extended OMP_PLACES syntax | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | OMP_NUM_TEAMS and OMP_TEAMS_THREAD_LIMIT env vars | :good:`done` | D138769 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | 'target_device' selector in context specifier | :none:`worked on` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | begin/end declare variant | :good:`done` | D71179 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | dispatch construct and function variant argument adjustment | :part:`worked on` | D99537, D99679 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | assumes directives | :part:`worked on` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | assume directive | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | nothing directive | :good:`done` | D123286 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | masked construct and related combined constructs | :good:`done` | D99995, D100514, PR-121741(parallel_masked_taskloop) |
-| | | | PR-121746(parallel_masked_task_loop_simd),PR-121914(masked_taskloop) |
-| | | | PR-121916(masked_taskloop_simd) |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| misc | default(firstprivate) & default(private) | :good:`done` | D75591 (firstprivate), D125912 (private) |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| other | deprecating master construct | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| OMPT | new barrier types added to ompt_sync_region_t enum | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| OMPT | async data transfers added to ompt_target_data_op_t enum | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| OMPT | new barrier state values added to ompt_state_t enum | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| OMPT | new 'emi' callbacks for external monitoring interfaces | :good:`done` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| OMPT | device tracing interface | :none:`in progress` | jplehr |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | 'strict' modifier for taskloop construct | :none:`unclaimed` | |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | inoutset in depend clause | :good:`done` | D97085, D118383 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| task | nowait clause on taskwait | :part:`partial` | parsing/sema done: D131830, D141531 |
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-
-
-.. _OpenMP 5.2 implementation details:
-
-OpenMP 5.2 Implementation Details
-=================================
-
-The following table provides a quick overview of various OpenMP 5.2 features
-and their implementation status. Please post on the
-`Discourse forums (Runtimes - OpenMP category)`_ for more
-information or if you want to help with the
-implementation.
-
-
-
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-|Feature | C/C++ Status | Fortran Status | Reviews |
-+=============================================================+===========================+===========================+==========================================================================+
-| omp_in_explicit_task() | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| semantics of explicit_task_var and implicit_task_var | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| ompx sentinel for C/C++ directive extensions | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| ompx prefix for clause extensions | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| if clause on teams construct | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| step modifier added | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| declare mapper: Add iterator modifier on map clause | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| declare mapper: Add iterator modifier on map clause | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| memspace and traits modifiers to uses allocator i | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Add otherwise clause to metadirectives | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| doacross clause with support for omp_cur_iteration | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| position of interop_type in init clause on iterop | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| implicit map type for target enter/exit data | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| work OMPT type for work-sharing loop constructs | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| allocate and firstprivate on scope directive | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Change loop consistency for order clause | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Add memspace and traits modifiers to uses_allocators | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Keep original base pointer on map w/o matched candidate | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Pure procedure support for certain directives | :none:`N/A` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| ALLOCATE statement support for allocators | :none:`N/A` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| dispatch construct extension to support end directive | :none:`N/A` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-
-
-
-.. _OpenMP 5.2 Deprecations:
-
-OpenMP 5.2 Deprecations
-=======================
-
-
-
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| | C/C++ Status | Fortran Status | Reviews |
-+=============================================================+===========================+===========================+==========================================================================+
-| Linear clause syntax | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| The minus operator | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Map clause modifiers without commas | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| The use of allocate directives with ALLOCATE statement | :good:`N/A` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| uses_allocators list syntax | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| The default clause on metadirectives | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| The delimited form of the declare target directive | :none:`unclaimed` | :good:`N/A` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| The use of the to clause on the declare target directive | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| The syntax of the destroy clause on the depobj construct | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| keyword source and sink as task-dependence modifiers | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| interop types in any position on init clause of interop | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| ompd prefix usage for some ICVs | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-
-.. _OpenMP 6.0 implementation details:
-
-OpenMP 6.0 Implementation Details
-=================================
-
-The following table provides a quick overview of various OpenMP 6.0 features
-and their implementation status. Please post on the
-`Discourse forums (Runtimes - OpenMP category)`_ for more
-information or if you want to help with the
-implementation.
-
-
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-|Feature | C/C++ Status | Fortran Status | Reviews |
-+=============================================================+===========================+===========================+==========================================================================+
-| free-agent threads | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| threadset clause | :part:`in progress` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Recording of task graphs | :part:`in progress` | :part:`in progress` | clang: jtb20, flang: kparzysz |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Parallel inductions | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| init_complete for scan directive | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| loop interchange transformation | :good:`done` | :none:`unclaimed` | Clang (interchange): https://github.com/llvm/llvm-project/pull/93022 |
-| | | | Clang (permutation): https://github.com/llvm/llvm-project/pull/92030 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| loop reverse transformation | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/92916 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| loop stripe transformation | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/119891 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| loop fusion transformation | :part:`in progress` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/139293 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| loop index set splitting transformation | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| loop transformation apply clause | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| loop fuse transformation | :good:`done` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| workdistribute construct | | :none:`in progress` | @skc7, @mjklemm |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| task_iteration | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| memscope clause for atomic and flush | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| transparent clause (hull tasks) | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| rule-based compound directives | :part:`In Progress` | :part:`In Progress` | kparzysz |
-| | | | Testing for Fortran missing |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| C23, C++23 | :none:`unclaimed` | | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Fortran 2023 | | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| decl attribute for declarative directives | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| C attribute syntax | :none:`unclaimed` | | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| pure directives in DO CONCURRENT | | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Optional argument for all clauses | :none:`partial` | :none:`In Progress` | Parse/Sema (nowait): https://github.com/llvm/llvm-project/pull/159628 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Function references for locator list items | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| All clauses accept directive name modifier | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Extensions to depobj construct | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Extensions to atomic construct | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Private reductions | :good:`mostly` | :none:`unclaimed` | Parse/Sema:https://github.com/llvm/llvm-project/pull/129938 |
-| | | | Codegen: https://github.com/llvm/llvm-project/pull/134709 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Self maps | :part:`partial` | :none:`unclaimed` | parsing/sema done: https://github.com/llvm/llvm-project/pull/129888 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Release map type for declare mapper | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Extensions to interop construct | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| no_openmp_constructs | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/125933 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| safe_sync and progress with identifier and API | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| OpenMP directives in concurrent loop regions | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/125621 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| atomics constructs on concurrent loop regions | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/125621 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Loop construct with DO CONCURRENT | | :part:`In Progress` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| device_type clause for target construct | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| nowait for ancestor target directives | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| New API for devices' num_teams/thread_limit | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Host and device environment variables | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| num_threads ICV and clause accepts list | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Numeric names for environment variables | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Increment between places for OMP_PLACES | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| OMP_AVAILABLE_DEVICES envirable | :none:`unclaimed` | :none:`unclaimed` | (should wait for "Traits for default device envirable" being done) |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Traits for default device envirable | :part:`in progress` | :none:`unclaimed` | ro-i |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Optionally omit array length expression | :good:`done` | :none:`unclaimed` | (Parse) https://github.com/llvm/llvm-project/pull/148048, |
-| | | | (Sema) https://github.com/llvm/llvm-project/pull/152786 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Canonical loop sequences | :part:`in progress` | :part:`in progress` | Clang: https://github.com/llvm/llvm-project/pull/139293 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Clarifications to Fortran map semantics | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| default clause at target construct | :part:`In Progress` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| ref count update use_device_{ptr, addr} | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Clarifications to implicit reductions | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| ref modifier for map clauses | :part:`In Progress` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| map-type modifiers in arbitrary position | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/90499 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Lift nesting restriction on concurrent loop | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/125621 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| priority clause for target constructs | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| changes to target_data construct | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Non-const do_not_sync for nowait/nogroup | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| need_device_addr modifier for adjust_args clause | :part:`partial` | :none:`unclaimed` | Parsing/Sema: https://github.com/llvm/llvm-project/pull/143442 |
-| | | | https://github.com/llvm/llvm-project/pull/149586 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Prescriptive num_threads | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/160659 |
-| | | | https://github.com/llvm/llvm-project/pull/146403 |
-| | | | https://github.com/llvm/llvm-project/pull/146404 |
-| | | | https://github.com/llvm/llvm-project/pull/146405 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Message and severity clauses | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/146093 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Local clause on declare target | :part:`In Progress` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| groupprivate directive | :part:`In Progress` | :part:`partial` | Flang: kparzysz, mjklemm |
-| | | | |
-| | | | Flang parser: https://github.com/llvm/llvm-project/pull/153807 |
-| | | | Flang sema: https://github.com/llvm/llvm-project/pull/154779 |
-| | | | Clang parse/sema: https://github.com/llvm/llvm-project/pull/158134 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| variable-category on default clause | :good:`done` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Changes to omp_target_is_accessible | :part:`In Progress` | :part:`In Progress` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| defaultmap implicit-behavior 'storage' | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/158336 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| defaultmap implicit-behavior 'private' | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/158712 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-
-.. _OpenMP 6.1 implementation details:
-
-OpenMP 6.1 Implementation Details (Experimental)
-================================================
-
-The following table provides a quick overview over various OpenMP 6.1 features
-and their implementation status. Since OpenMP 6.1 has not yet been released, the
-following features are experimental and are subject to change at any time.
-Please post on the `Discourse forums (Runtimes - OpenMP category)`_ for more
-information or if you want to help with the
-implementation.
-
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-|Feature | C/C++ Status | Fortran Status | Reviews |
-+=============================================================+===========================+===========================+==========================================================================+
-| dyn_groupprivate clause | :part:`In Progress` | :part:`In Progress` | C/C++: kevinsala (https://github.com/llvm/llvm-project/pull/152651 |
-| | | | https://github.com/llvm/llvm-project/pull/152830 |
-| | | | https://github.com/llvm/llvm-project/pull/152831) |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| loop flatten transformation | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| loop grid/tile modifiers for sizes clause | :none:`unclaimed` | :none:`unclaimed` | |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| attach map-type modifier | :part:`In Progress` | :none:`unclaimed` | C/C++: @abhinavgaba; |
-| | | | RT: @abhinavgaba (https://github.com/llvm/llvm-project/pull/149036, |
-| | | | https://github.com/llvm/llvm-project/pull/158370) |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-
-
-OpenMP Extensions
-=================
-
-The following table provides a quick overview over various OpenMP
-extensions and their implementation status. These extensions are not
-currently defined by any standard, so links to associated LLVM
-documentation are provided. As these extensions mature, they will be
-considered for standardization. Please post on the
-`Discourse forums (Runtimes - OpenMP category)`_ to provide feedback.
-
-+------------------------------+-----------------------------------------------------------------------------------+--------------------------+--------------------------------------------------------+
-|Category | Feature | Status | Reviews |
-+==============================+===================================================================================+==========================+========================================================+
-| atomic extension | `'atomic' strictly nested within 'teams' | :good:`prototyped` | D126323 |
-| | <https://openmp.llvm.org/docs/openacc/OpenMPExtensions.html#atomicWithinTeams>`_ | | |
-+------------------------------+-----------------------------------------------------------------------------------+--------------------------+--------------------------------------------------------+
-| device extension | `'ompx_hold' map type modifier | :good:`prototyped` | D106509, D106510 |
-| | <https://openmp.llvm.org/docs/openacc/OpenMPExtensions.html#ompx-hold>`_ | | |
-+------------------------------+-----------------------------------------------------------------------------------+--------------------------+--------------------------------------------------------+
-| device extension | `'ompx_bare' clause on 'target teams' construct | :good:`prototyped` | #66844, #70612 |
-| | <https://www.osti.gov/servlets/purl/2205717>`_ | | |
-+------------------------------+-----------------------------------------------------------------------------------+--------------------------+--------------------------------------------------------+
-| device extension | Multi-dim 'num_teams' and 'thread_limit' clause on 'target teams ompx_bare' | :good:`partial` | #99732, #101407, #102715 |
-| | construct | | |
-+------------------------------+-----------------------------------------------------------------------------------+--------------------------+--------------------------------------------------------+
-
-.. _Discourse forums (Runtimes - OpenMP category): https://discourse.llvm.org/c/runtimes/openmp/35
+.. raw:: html + + <style type="text/css"> + .none { background-color: #FFCCCC } + .part { background-color: #FFFF99 } + .good { background-color: #CCFF99 } + </style> + +.. role:: none +.. role:: part +.. role:: good + +.. contents:: + :local: + +============== +OpenMP Support +============== + +Clang fully supports OpenMP 4.5, almost all of 5.0 and most of 5.1/2. +Clang supports offloading to X86_64, AArch64, PPC64[LE], NVIDIA GPUs (all models) and AMD GPUs (all models). + +In addition, the LLVM OpenMP runtime `libomp` supports the OpenMP Tools +Interface (OMPT) on x86, x86_64, AArch64, and PPC64 on Linux, Windows, and macOS. +OMPT is also supported for NVIDIA and AMD GPUs. + +For the list of supported features from OpenMP 5.0 and 5.1 +see `OpenMP implementation details`_ and `OpenMP 51 implementation details`_. + +General improvements +==================== +- New collapse clause scheme to avoid expensive remainder operations. + Compute loop index variables after collapsing a loop nest via the + collapse clause by replacing the expensive remainder operation with + multiplications and additions. + +- When using the collapse clause on a loop nest the default behavior + is to automatically extend the representation of the loop counter to + 64 bits for the cases where the sizes of the collapsed loops are not + known at compile time. To prevent this conservative choice and use + at most 32 bits, compile your program with the + `-fopenmp-optimistic-collapse`. + + +GPU devices support +=================== + +Data-sharing modes +------------------ + +Clang supports two data-sharing models for Cuda devices: `Generic` and `Cuda` +modes. The default mode is `Generic`. `Cuda` mode can give an additional +performance and can be activated using the `-fopenmp-cuda-mode` flag. In +`Generic` mode all local variables that can be shared in the parallel regions +are stored in the global memory. In `Cuda` mode local variables are not shared +between the threads and it is user responsibility to share the required data +between the threads in the parallel regions. Often, the optimizer is able to +reduce the cost of `Generic` mode to the level of `Cuda` mode, but the flag, +as well as other assumption flags, can be used for tuning. + +Features not supported or with limited support for Cuda devices +--------------------------------------------------------------- + +- Cancellation constructs are not supported. + +- Doacross loop nest is not supported. + +- User-defined reductions are supported only for trivial types. + +- Nested parallelism: inner parallel regions are executed sequentially. + +- Debug information for OpenMP target regions is supported, but sometimes it may + be required to manually specify the address class of the inspected variables. + In some cases the local variables are actually allocated in the global memory, + but the debug info may be not aware of it. + + +.. _OpenMP implementation details: + +OpenMP 5.0 Implementation Details +================================= + +The following table provides a quick overview over various OpenMP 5.0 features +and their implementation status. Please post on the +`Discourse forums (Runtimes - OpenMP category)`_ for more +information or if you want to help with the +implementation. + ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +|Category | Feature | Status | Reviews | ++==============================+==============================================================+==========================+=======================================================================+ +| loop | support != in the canonical loop form | :good:`done` | D54441 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| loop | #pragma omp loop (directive) | :part:`partial` | D145823 (combined forms) | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| loop | #pragma omp loop bind | :part:`worked on` | D144634 (needs review) | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| loop | collapse imperfectly nested loop | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| loop | collapse non-rectangular nested loop | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| loop | C++ range-base for loop | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| loop | clause: if for SIMD directives | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| loop | inclusive scan (matching C++17 PSTL) | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| memory management | memory allocators | :good:`done` | r341687,r357929 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| memory management | allocate directive and allocate clause | :good:`done` | r355614,r335952 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| OMPD | OMPD interfaces | :good:`done` | https://reviews.llvm.org/D99914 (Supports only HOST(CPU) and Linux | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| OMPT | OMPT interfaces (callback support) | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| thread affinity | thread affinity | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | taskloop reduction | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | task affinity | :part:`not upstream` | https://github.com/jklinkenberg/openmp/tree/task-affinity | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | clause: depend on the taskwait construct | :good:`done` | D113540 (regular codegen only) | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | depend objects and detachable tasks | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | mutexinoutset dependence-type for tasks | :good:`done` | D53380,D57576 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | combined taskloop constructs | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | master taskloop | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | parallel master taskloop | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | master taskloop simd | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | parallel master taskloop simd | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| SIMD | atomic and simd constructs inside SIMD code | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| SIMD | SIMD nontemporal | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | infer target functions from initializers | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | infer target variables from initializers | :good:`done` | D146418 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | OMP_TARGET_OFFLOAD environment variable | :good:`done` | D50522 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | support full 'defaultmap' functionality | :good:`done` | D69204 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | device specific functions | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | clause: device_type | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | clause: extended device | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | clause: uses_allocators clause | :good:`done` | https://github.com/llvm/llvm-project/pull/157025 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | clause: in_reduction | :part:`worked on` | r308768 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | omp_get_device_num() | :good:`done` | D54342,D128347 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | structure mapping of references | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | nested target declare | :good:`done` | D51378 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | implicitly map 'this' (this[:1]) | :good:`done` | D55982 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | allow access to the reference count (omp_target_is_present) | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | requires directive | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | clause: unified_shared_memory | :good:`done` | D52625,D52359 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | clause: unified_address | :part:`partial` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | clause: reverse_offload | :part:`partial` | D52780,D155003 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | clause: atomic_default_mem_order | :good:`done` | D53513 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | clause: dynamic_allocators | :part:`unclaimed parts` | D53079 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | user-defined mappers | :good:`done` | D56326,D58638,D58523,D58074,D60972,D59474 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | map array-section with implicit mapper | :good:`done` | https://github.com/llvm/llvm-project/pull/101101 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | mapping lambda expression | :good:`done` | D51107 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | clause: use_device_addr for target data | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | support close modifier on map clause | :good:`done` | D55719,D55892 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | teams construct on the host device | :good:`done` | r371553 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | support non-contiguous array sections for target update | :good:`done` | https://github.com/llvm/llvm-project/pull/144635 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | pointer attachment | :part:`being repaired` | @abhinavgaba (https://github.com/llvm/llvm-project/pull/153683) | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| atomic | hints for the atomic construct | :good:`done` | D51233 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| base language | C11 support | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| base language | C++11/14/17 support | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| base language | lambda support | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | array shaping | :good:`done` | D74144 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | library shutdown (omp_pause_resource[_all]) | :good:`done` | D55078 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | metadirectives | :part:`mostly done` | D91944, https://github.com/llvm/llvm-project/pull/128640 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | conditional modifier for lastprivate clause | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | iterator and multidependences | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | depobj directive and depobj dependency kind | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | user-defined function variants | :good:`done`. | D67294, D64095, D71847, D71830, D109635 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | pointer/reference to pointer based array reductions | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | prevent new type definitions in clauses | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| memory model | memory model update (seq_cst, acq_rel, release, acquire,...) | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ + + +.. _OpenMP 51 implementation details: + +OpenMP 5.1 Implementation Details +================================= + +The following table provides a quick overview over various OpenMP 5.1 features +and their implementation status. +Please post on the +`Discourse forums (Runtimes - OpenMP category)`_ for more +information or if you want to help with the +implementation. + ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +|Category | Feature | Status | Reviews | ++==============================+==============================================================+==========================+=======================================================================+ +| atomic | 'compare' clause on atomic construct | :good:`done` | D120290, D120007, D118632, D120200, D116261, D118547, D116637 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| atomic | 'fail' clause on atomic construct | :part:`worked on` | D123235 (in progress) | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| base language | C++ attribute specifier syntax | :good:`done` | D105648 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | 'present' map type modifier | :good:`done` | D83061, D83062, D84422 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | 'present' motion modifier | :good:`done` | D84711, D84712 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | 'present' in defaultmap clause | :good:`done` | D92427 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | map clause reordering based on 'present' modifier | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | device-specific environment variables | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | omp_target_is_accessible routine | :good:`done` | https://github.com/llvm/llvm-project/pull/138294 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | omp_get_mapped_ptr routine | :good:`done` | D141545 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | new async target memory copy routines | :good:`done` | D136103 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | thread_limit clause on target construct | :part:`partial` | D141540 (offload), D152054 (host, in progress) | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | has_device_addr clause on target construct | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | iterators in map clause or motion clauses | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | indirect clause on declare target directive | :part:`In Progress` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | allow virtual functions calls for mapped object on device | :part:`partial` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | interop construct | :part:`partial` | parsing/sema done: D98558, D98834, D98815 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| device | assorted routines for querying interoperable properties | :part:`partial` | D106674 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| loop | Loop tiling transformation | :good:`done` | D76342 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| loop | Loop unrolling transformation | :good:`done` | D99459 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| loop | 'reproducible'/'unconstrained' modifiers in 'order' clause | :part:`partial` | D127855 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| memory management | alignment for allocate directive and clause | :good:`done` | D115683 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| memory management | 'allocator' modifier for allocate clause | :good:`done` | https://github.com/llvm/llvm-project/pull/114883 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| memory management | 'align' modifier for allocate clause | :good:`done` | https://github.com/llvm/llvm-project/pull/121814 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| memory management | new memory management routines | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| memory management | changes to omp_alloctrait_key enum | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| memory model | seq_cst clause on flush construct | :good:`done` | https://github.com/llvm/llvm-project/pull/114072 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | 'omp_all_memory' keyword and use in 'depend' clause | :good:`done` | D125828, D126321 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | error directive | :good:`done` | D139166 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | scope construct | :good:`done` | D157933, https://github.com/llvm/llvm-project/pull/109197 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | routines for controlling and querying team regions | :part:`partial` | D95003 (libomp only) | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | changes to ompt_scope_endpoint_t enum | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | omp_display_env routine | :good:`done` | D74956 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | extended OMP_PLACES syntax | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | OMP_NUM_TEAMS and OMP_TEAMS_THREAD_LIMIT env vars | :good:`done` | D138769 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | 'target_device' selector in context specifier | :none:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | begin/end declare variant | :good:`done` | D71179 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | dispatch construct and function variant argument adjustment | :part:`worked on` | D99537, D99679 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | assumes directives | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | assume directive | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | nothing directive | :good:`done` | D123286 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | masked construct and related combined constructs | :good:`done` | D99995, D100514, PR-121741(parallel_masked_taskloop) | +| | | | PR-121746(parallel_masked_task_loop_simd),PR-121914(masked_taskloop) | +| | | | PR-121916(masked_taskloop_simd) | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| misc | default(firstprivate) & default(private) | :good:`done` | D75591 (firstprivate), D125912 (private) | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| other | deprecating master construct | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| OMPT | new barrier types added to ompt_sync_region_t enum | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| OMPT | async data transfers added to ompt_target_data_op_t enum | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| OMPT | new barrier state values added to ompt_state_t enum | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| OMPT | new 'emi' callbacks for external monitoring interfaces | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| OMPT | device tracing interface | :none:`in progress` | jplehr | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | 'strict' modifier for taskloop construct | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | inoutset in depend clause | :good:`done` | D97085, D118383 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ +| task | nowait clause on taskwait | :part:`partial` | parsing/sema done: D131830, D141531 | ++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+ + + +.. _OpenMP 5.2 implementation details: + +OpenMP 5.2 Implementation Details +================================= + +The following table provides a quick overview of various OpenMP 5.2 features +and their implementation status. Please post on the +`Discourse forums (Runtimes - OpenMP category)`_ for more +information or if you want to help with the +implementation. + + + ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +|Feature | C/C++ Status | Fortran Status | Reviews | ++=============================================================+===========================+===========================+==========================================================================+ +| omp_in_explicit_task() | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| semantics of explicit_task_var and implicit_task_var | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| ompx sentinel for C/C++ directive extensions | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| ompx prefix for clause extensions | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| if clause on teams construct | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| step modifier added | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| declare mapper: Add iterator modifier on map clause | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| declare mapper: Add iterator modifier on map clause | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| memspace and traits modifiers to uses allocator i | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Add otherwise clause to metadirectives | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| doacross clause with support for omp_cur_iteration | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| position of interop_type in init clause on iterop | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| implicit map type for target enter/exit data | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| work OMPT type for work-sharing loop constructs | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| allocate and firstprivate on scope directive | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Change loop consistency for order clause | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Add memspace and traits modifiers to uses_allocators | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Keep original base pointer on map w/o matched candidate | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Pure procedure support for certain directives | :none:`N/A` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| ALLOCATE statement support for allocators | :none:`N/A` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| dispatch construct extension to support end directive | :none:`N/A` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ + + + +.. _OpenMP 5.2 Deprecations: + +OpenMP 5.2 Deprecations +======================= + + + ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| | C/C++ Status | Fortran Status | Reviews | ++=============================================================+===========================+===========================+==========================================================================+ +| Linear clause syntax | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| The minus operator | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Map clause modifiers without commas | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| The use of allocate directives with ALLOCATE statement | :good:`N/A` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| uses_allocators list syntax | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| The default clause on metadirectives | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| The delimited form of the declare target directive | :none:`unclaimed` | :good:`N/A` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| The use of the to clause on the declare target directive | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| The syntax of the destroy clause on the depobj construct | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| keyword source and sink as task-dependence modifiers | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| interop types in any position on init clause of interop | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| ompd prefix usage for some ICVs | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ + +.. _OpenMP 6.0 implementation details: + +OpenMP 6.0 Implementation Details +================================= + +The following table provides a quick overview of various OpenMP 6.0 features +and their implementation status. Please post on the +`Discourse forums (Runtimes - OpenMP category)`_ for more +information or if you want to help with the +implementation. + + ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +|Feature | C/C++ Status | Fortran Status | Reviews | ++=============================================================+===========================+===========================+==========================================================================+ +| free-agent threads | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| threadset clause | :part:`partial` | :none:`unclaimed` | Parse/Sema/Codegen : https://github.com/llvm/llvm-project/pull/13580 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Recording of task graphs | :part:`in progress` | :part:`in progress` | clang: jtb20, flang: kparzysz | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Parallel inductions | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| init_complete for scan directive | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| loop interchange transformation | :good:`done` | :none:`unclaimed` | Clang (interchange): https://github.com/llvm/llvm-project/pull/93022 | +| | | | Clang (permutation): https://github.com/llvm/llvm-project/pull/92030 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| loop reverse transformation | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/92916 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| loop stripe transformation | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/119891 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| loop fusion transformation | :part:`in progress` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/139293 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| loop index set splitting transformation | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| loop transformation apply clause | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| loop fuse transformation | :good:`done` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| workdistribute construct | | :none:`in progress` | @skc7, @mjklemm | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| task_iteration | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| memscope clause for atomic and flush | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| transparent clause (hull tasks) | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| rule-based compound directives | :part:`In Progress` | :part:`In Progress` | kparzysz | +| | | | Testing for Fortran missing | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| C23, C++23 | :none:`unclaimed` | | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Fortran 2023 | | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| decl attribute for declarative directives | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| C attribute syntax | :none:`unclaimed` | | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| pure directives in DO CONCURRENT | | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Optional argument for all clauses | :none:`partial` | :none:`In Progress` | Parse/Sema (nowait): https://github.com/llvm/llvm-project/pull/159628 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Function references for locator list items | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| All clauses accept directive name modifier | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Extensions to depobj construct | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Extensions to atomic construct | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Private reductions | :good:`mostly` | :none:`unclaimed` | Parse/Sema:https://github.com/llvm/llvm-project/pull/129938 | +| | | | Codegen: https://github.com/llvm/llvm-project/pull/134709 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Self maps | :part:`partial` | :none:`unclaimed` | parsing/sema done: https://github.com/llvm/llvm-project/pull/129888 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Release map type for declare mapper | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Extensions to interop construct | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| no_openmp_constructs | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/125933 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| safe_sync and progress with identifier and API | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| OpenMP directives in concurrent loop regions | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/125621 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| atomics constructs on concurrent loop regions | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/125621 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Loop construct with DO CONCURRENT | | :part:`In Progress` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| device_type clause for target construct | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| nowait for ancestor target directives | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| New API for devices' num_teams/thread_limit | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Host and device environment variables | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| num_threads ICV and clause accepts list | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Numeric names for environment variables | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Increment between places for OMP_PLACES | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| OMP_AVAILABLE_DEVICES envirable | :none:`unclaimed` | :none:`unclaimed` | (should wait for "Traits for default device envirable" being done) | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Traits for default device envirable | :part:`in progress` | :none:`unclaimed` | ro-i | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Optionally omit array length expression | :good:`done` | :none:`unclaimed` | (Parse) https://github.com/llvm/llvm-project/pull/148048, | +| | | | (Sema) https://github.com/llvm/llvm-project/pull/152786 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Canonical loop sequences | :part:`in progress` | :part:`in progress` | Clang: https://github.com/llvm/llvm-project/pull/139293 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Clarifications to Fortran map semantics | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| default clause at target construct | :part:`In Progress` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| ref count update use_device_{ptr, addr} | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Clarifications to implicit reductions | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| ref modifier for map clauses | :part:`In Progress` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| map-type modifiers in arbitrary position | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/90499 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Lift nesting restriction on concurrent loop | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/125621 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| priority clause for target constructs | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| changes to target_data construct | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Non-const do_not_sync for nowait/nogroup | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| need_device_addr modifier for adjust_args clause | :part:`partial` | :none:`unclaimed` | Parsing/Sema: https://github.com/llvm/llvm-project/pull/143442 | +| | | | https://github.com/llvm/llvm-project/pull/149586 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Prescriptive num_threads | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/160659 | +| | | | https://github.com/llvm/llvm-project/pull/146403 | +| | | | https://github.com/llvm/llvm-project/pull/146404 | +| | | | https://github.com/llvm/llvm-project/pull/146405 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Message and severity clauses | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/146093 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Local clause on declare target | :part:`In Progress` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| groupprivate directive | :part:`In Progress` | :part:`partial` | Flang: kparzysz, mjklemm | +| | | | | +| | | | Flang parser: https://github.com/llvm/llvm-project/pull/153807 | +| | | | Flang sema: https://github.com/llvm/llvm-project/pull/154779 | +| | | | Clang parse/sema: https://github.com/llvm/llvm-project/pull/158134 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| variable-category on default clause | :good:`done` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| Changes to omp_target_is_accessible | :part:`In Progress` | :part:`In Progress` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| defaultmap implicit-behavior 'storage' | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/158336 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| defaultmap implicit-behavior 'private' | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/158712 | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ + +.. _OpenMP 6.1 implementation details: + +OpenMP 6.1 Implementation Details (Experimental) +================================================ + +The following table provides a quick overview over various OpenMP 6.1 features +and their implementation status. Since OpenMP 6.1 has not yet been released, the +following features are experimental and are subject to change at any time. +Please post on the `Discourse forums (Runtimes - OpenMP category)`_ for more +information or if you want to help with the +implementation. + ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +|Feature | C/C++ Status | Fortran Status | Reviews | ++=============================================================+===========================+===========================+==========================================================================+ +| dyn_groupprivate clause | :part:`In Progress` | :part:`In Progress` | C/C++: kevinsala (https://github.com/llvm/llvm-project/pull/152651 | +| | | | https://github.com/llvm/llvm-project/pull/152830 | +| | | | https://github.com/llvm/llvm-project/pull/152831) | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| loop flatten transformation | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| loop grid/tile modifiers for sizes clause | :none:`unclaimed` | :none:`unclaimed` | | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ +| attach map-type modifier | :part:`In Progress` | :none:`unclaimed` | C/C++: @abhinavgaba; | +| | | | RT: @abhinavgaba (https://github.com/llvm/llvm-project/pull/149036, | +| | | | https://github.com/llvm/llvm-project/pull/158370) | ++-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+ + + +OpenMP Extensions +================= + +The following table provides a quick overview over various OpenMP +extensions and their implementation status. These extensions are not +currently defined by any standard, so links to associated LLVM +documentation are provided. As these extensions mature, they will be +considered for standardization. Please post on the +`Discourse forums (Runtimes - OpenMP category)`_ to provide feedback. + ++------------------------------+-----------------------------------------------------------------------------------+--------------------------+--------------------------------------------------------+ +|Category | Feature | Status | Reviews | ++==============================+===================================================================================+==========================+========================================================+ +| atomic extension | `'atomic' strictly nested within 'teams' | :good:`prototyped` | D126323 | +| | <https://openmp.llvm.org/docs/openacc/OpenMPExtensions.html#atomicWithinTeams>`_ | | | ++------------------------------+-----------------------------------------------------------------------------------+--------------------------+--------------------------------------------------------+ +| device extension | `'ompx_hold' map type modifier | :good:`prototyped` | D106509, D106510 | +| | <https://openmp.llvm.org/docs/openacc/OpenMPExtensions.html#ompx-hold>`_ | | | ++------------------------------+-----------------------------------------------------------------------------------+--------------------------+--------------------------------------------------------+ +| device extension | `'ompx_bare' clause on 'target teams' construct | :good:`prototyped` | #66844, #70612 | +| | <https://www.osti.gov/servlets/purl/2205717>`_ | | | ++------------------------------+-----------------------------------------------------------------------------------+--------------------------+--------------------------------------------------------+ +| device extension | Multi-dim 'num_teams' and 'thread_limit' clause on 'target teams ompx_bare' | :good:`partial` | #99732, #101407, #102715 | +| | construct | | | ++------------------------------+-----------------------------------------------------------------------------------+--------------------------+--------------------------------------------------------+ + +.. _Discourse forums (Runtimes - OpenMP category): https://discourse.llvm.org/c/runtimes/openmp/35 |