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-
- <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` |
|
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| 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
| :good:`done` |
|
-+------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| 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
| :part:`In Progress` |
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 6.0 implementation details:
-
-OpenMP 6.0 Implementation Details
-=================================
-
-The following table provides a quick overview over 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 | :`worked on`
| :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Recording of task graphs |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Parallel inductions |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| init_complete for scan directive |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Loop transformation constructs |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| loop stripe transformation | :good:`done`
| https://github.com/llvm/llvm-project/pull/119891
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| 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 |
:none:`unclaimed` | :part:`In Progress` | Testing for Fortran
missing |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| C23, C++23 |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Fortran 2023 |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| decl attribute for declarative directives |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| C attribute syntax |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| pure directives in DO CONCURRENT |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Optional argument for all clauses |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| 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 |
:none:`unclaimed` | :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` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Traits for default device envirable |
:none:`unclaimed` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Optionally omit array length expression | :good:`done`
| :none:`unclaimed` |
https://github.com/llvm/llvm-project/pull/148048 |
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Canonical loop sequences |
:none:`unclaimed` | :part:`In Progress` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| 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 | :part:`In
Progress` | :none:`unclaimed` | ro-i
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Message and severity clauses | :part:`In
Progress` | :none:`unclaimed` | ro-i
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Local clause on declare target | :part:`In
Progress` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| groupprivate directive | :part:`In
Progress` | :part:`In Progress` | Flang: kparzysz, mjklemm
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| variable-category on default clause | :part:`In
Progress` | :none:`unclaimed` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-| Changes to omp_target_is_accessible | :part:`In
Progress` | :part:`In Progress` |
|
-+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
-
-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
----------------
alexey-bataev wrote:
Restore original formatting
https://github.com/llvm/llvm-project/pull/135807
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