Index: docs/OpenMPSupport.rst =================================================================== --- /dev/null +++ docs/OpenMPSupport.rst @@ -0,0 +1,74 @@ +.. raw:: html + + + +.. role:: none +.. role:: partial +.. role:: good + +================== +OpenMP Support +================== + +Clang fully supports OpenMP 3.1 + some elements of OpenMP 4.5. Clang supports offloading to X86_64, AArch64, PPC64[LE] and Cuda devices. +The status of major OpenMP 4.5 features support in Clang. + +Standalone directives +===================== + +* #pragma omp [for] simd: :good:`Complete`. + +* #pragma omp declare simd: :partial:`Partial`. We support parsing/semantic + analysis + generation of special attributes for X86 target, but still + missing the LLVM pass for vectorization. + +* #pragma omp taskloop [simd]: :good:`Complete`. + +* #pragma omp target [enter|exit] data: :good:`Mostly complete`. Some rework is + required for better stability. + +* #pragma omp target update: :good:`Mostly complete`. Some rework is + required for better stability. + +* #pragma omp target: :partial:`Partial`. No support for the `reduction`, + `nowait` and `depend` clauses. + +* #pragma omp declare target: :partial:`Partial`. No full codegen support. + +* #pragma omp teams: :good:`Complete`. + +* #pragma omp distribute [simd]: :good:`Complete`. + +* #pragma omp distribute parallel for [simd]: :good:`Complete`. + +Combined directives +=================== + +* #pragma omp parallel for simd: :good:`Complete`. + +* #pragma omp target parallel: :partial:`Partial`. No support for the `reduction`, + `nowait` and `depend` clauses. + +* #pragma omp target parallel for [simd]: :partial:`Partial`. No support for the `reduction`, + `nowait` and `depend` clauses. + +* #pragma omp target simd: :partial:`Partial`. No support for the `reduction`, + `nowait` and `depend` clauses. + +* #pragma omp target teams: :partial:`Partial`. No support for the `reduction`, + `nowait` and `depend` clauses. + +* #pragma omp teams distribute [simd]: :partial:`Partial`. No full codegen support. + +* #pragma omp target teams distribute [simd]: :partial:`Partial`. No full codegen support. + +* #pragma omp teams distribute parallel for [simd]: :partial:`Partial`. No full codegen support. + +* #pragma omp target teams distribute parallel for [simd]: :partial:`Partial`. No full codegen support. + +Clang does not support any constructs/updates from upcoming OpenMP 5.0 except for `reduction`-based clauses in the `task`-based directives. + Index: docs/index.rst =================================================================== --- docs/index.rst +++ docs/index.rst @@ -39,6 +39,7 @@ SourceBasedCodeCoverage Modules MSVCCompatibility + OpenMPSupport ThinLTO CommandGuide/index FAQ