diff --git a/clang/docs/OpenMPSupport.rst b/clang/docs/OpenMPSupport.rst --- a/clang/docs/OpenMPSupport.rst +++ b/clang/docs/OpenMPSupport.rst @@ -2,12 +2,12 @@ .. role:: none -.. role:: partial +.. role:: part .. role:: good .. contents:: @@ -17,7 +17,7 @@ OpenMP Support ================== -Clang supports the following OpenMP 5.0 features +Clang supports the following OpenMP 5.0 features (see also `OpenMP implementation details`_): * The `reduction`-based clauses in the `task` and `target`-based directives. @@ -37,7 +37,7 @@ Clang fully supports OpenMP 4.5. Clang supports offloading to X86_64, AArch64, PPC64[LE] and has `basic support for Cuda devices`_. -* #pragma omp declare simd: :partial:`Partial`. We support parsing/semantic +* #pragma omp declare simd: :part:`Partial`. We support parsing/semantic analysis + generation of special attributes for X86 target, but still missing the LLVM pass for vectorization. @@ -129,3 +129,132 @@ 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 contact *openmp-dev* at +*lists.llvm.org* for more information or if you want to help with the +implementation. + ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +|Category | Feature | Status | Reviews | ++==============================+==============================================================+==========================+============================================+ +| loop extension | support != in the canonical loop form | :good:`done` | D54441 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| loop extension | #pragma omp loop (directive) | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| loop extension | collapse imperfectly nested loop | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| loop extension | collapse non-rectangular nested loop | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| loop extension | C++ range-base for loop | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| loop extension | clause: nosimd for SIMD directives | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| loop extension | inclusive scan extension (matching C++17 PSTL) | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| memory mangagement | memory allocators | :good:`done` | r341687,r357929 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| memory mangagement | allocate directive and allocate clause | :good:`done` | r355614,r335952 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| OMPD | OMPD interfaces | :part:`not upstream` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| OMPT | OMPT interfaces | :part:`mostly done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| thread affinity extension | thread affinity extension | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| task extension | taskloop reduction | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| task extension | task affinity | :part:`not upstream` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| task extension | clause: depend on the taskwait construct | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| task extension | depend objects and detachable tasks | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| task extension | mutexinoutset dependence-type for tasks | :good:`done` | D53380,D57576 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| task extension | combined taskloop constructs | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| task extension | master taskloop | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| task extension | parallel master taskloop | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| task extension | master taskloop simd | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| task extension | parallel master taskloop simd | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| SIMD extension | atomic and critical constructs inside SIMD code | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| SIMD extension | SIMD nontemporal | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | infer target functions from initializers | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | infer target variables from initializers | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | OMP_TARGET_OFFLOAD environment variable | :good:`done` | D50522 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | support full 'defaultmap' functionality | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | device specific functions | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | clause: device_type | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | clause: in_reduction | :none:`unclaimed` | r308768 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | omp_get_device_num() | :part:`worked on` | D54342 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | structure mapping of references | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | nested target declare | :good:`done` | D51378 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | implicitly map 'this' (this[:1]) | :good:`done` | D55982 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | allow access to the reference count (omp_target_is_present) | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | requires directive (unified shared memory) | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | clause: unified_address, unified_shared_memory | :part:`worked on` | D52625,D52359 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | clause: reverse_offload | :none:`unclaimed parts` | D52780 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | clause: atomic_default_mem_order | :none:`unclaimed parts` | D53513 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | clause: dynamic_allocators | :none:`unclaimed parts` | D53079 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | user-defined mappers | :part:`worked on` | D56326,D58638,D58523,D58074,D60972,D59474 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | mapping lambda expression | :good:`done` | D51107 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | clause: use_device_addr for target data | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | map(replicate) or map(local) when requires unified_shared_me | :part:`worked on` | D55719,D55892 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| device extension | teams construct on the host device | :part:`worked on` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| atomic extension | hints for the atomic construct | :part:`worked on` | D51233 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| base language | C11 support | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| base language | C++11/14/17 support | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| base language | lambda support | :good:`done` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| misc extension | array shaping | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| misc extension | library shutdown (omp_pause_resource[_all]) | :none:`unclaimed parts` | D55078 | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| misc extension | metadirectives | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| misc extension | conditional modifier for lastprivate clause | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| misc extension | user-defined function variants | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| misc extensions | pointer/reference to pointer based array reductions | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +| misc extensions | prevent new type definitions in clauses | :none:`unclaimed` | | ++------------------------------+--------------------------------------------------------------+--------------------------+--------------------------------------------+ +