Author: hans Date: Tue Jan 22 08:59:31 2019 New Revision: 351839 URL: http://llvm.org/viewvc/llvm-project?rev=351839&view=rev Log: Merging r351580: ------------------------------------------------------------------------ r351580 | kli | 2019-01-18 20:57:37 +0100 (Fri, 18 Jan 2019) | 4 lines
[OPENMP][DOCS] Release notes/OpenMP support updates, NFC. Differential Revision: https://reviews.llvm.org/D56733 ------------------------------------------------------------------------ Modified: cfe/branches/release_80/ (props changed) cfe/branches/release_80/docs/OpenMPSupport.rst cfe/branches/release_80/docs/ReleaseNotes.rst Propchange: cfe/branches/release_80/ ------------------------------------------------------------------------------ --- svn:mergeinfo (original) +++ svn:mergeinfo Tue Jan 22 08:59:31 2019 @@ -1,4 +1,4 @@ /cfe/branches/type-system-rewrite:134693-134817 -/cfe/trunk:351334,351340,351344,351360,351457,351459 +/cfe/trunk:351334,351340,351344,351360,351457,351459,351580 /cfe/trunk/test:170344 /cfe/trunk/test/SemaTemplate:126920 Modified: cfe/branches/release_80/docs/OpenMPSupport.rst URL: http://llvm.org/viewvc/llvm-project/cfe/branches/release_80/docs/OpenMPSupport.rst?rev=351839&r1=351838&r2=351839&view=diff ============================================================================== --- cfe/branches/release_80/docs/OpenMPSupport.rst (original) +++ cfe/branches/release_80/docs/OpenMPSupport.rst Tue Jan 22 08:59:31 2019 @@ -17,60 +17,50 @@ OpenMP Support ================== -Clang fully supports OpenMP 4.5. Clang supports offloading to X86_64, AArch64, -PPC64[LE] and has `basic support for Cuda devices`_. - -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:`Complete`. - -* #pragma omp target update: :good:`Complete`. - -* #pragma omp target: :good:`Complete`. +Clang supports the following OpenMP 5.0 features -* #pragma omp declare target: :good:`Complete`. +* The `reduction`-based clauses in the `task` and `target`-based directives. -* #pragma omp teams: :good:`Complete`. +* Support relational-op != (not-equal) as one of the canonical forms of random + access iterator. -* #pragma omp distribute [simd]: :good:`Complete`. +* Support for mapping of the lambdas in target regions. -* #pragma omp distribute parallel for [simd]: :good:`Complete`. +* Parsing/sema analysis for the requires directive. -Combined directives -=================== +* Nested declare target directives. -* #pragma omp parallel for simd: :good:`Complete`. +* Make the `this` pointer implicitly mapped as `map(this[:1])`. -* #pragma omp target parallel: :good:`Complete`. +* The `close` *map-type-modifier*. -* #pragma omp target parallel for [simd]: :good:`Complete`. - -* #pragma omp target simd: :good:`Complete`. - -* #pragma omp target teams: :good:`Complete`. - -* #pragma omp teams distribute [simd]: :good:`Complete`. - -* #pragma omp target teams distribute [simd]: :good:`Complete`. - -* #pragma omp teams distribute parallel for [simd]: :good:`Complete`. - -* #pragma omp target teams distribute parallel for [simd]: :good:`Complete`. +Clang fully supports OpenMP 4.5. Clang supports offloading to X86_64, AArch64, +PPC64[LE] and has `basic support for Cuda devices`_. -Clang does not support any constructs/updates from OpenMP 5.0 except -for `reduction`-based clauses in the `task` and `target`-based directives. +* #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. In addition, the LLVM OpenMP runtime `libomp` supports the OpenMP Tools -Interface (OMPT) on x86, x86_64, AArch64, and PPC64 on Linux, Windows, and mac OS. +Interface (OMPT) on x86, x86_64, AArch64, and PPC64 on Linux, Windows, and macOS. + +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. + +- The default schedules for the `distribute` and `for` constructs in a + parallel region and in SPMD mode have changed to ensure coalesced + accesses. For the `distribute` construct, a static schedule is used + with a chunk size equal to the number of threads per team (default + value of threads or as specified by the `thread_limit` clause if + present). For the `for` construct, the schedule is static with chunk + size of one. + +- Simplified SPMD code generation for `distribute parallel for` when + the new default schedules are applicable. .. _basic support for Cuda devices: Modified: cfe/branches/release_80/docs/ReleaseNotes.rst URL: http://llvm.org/viewvc/llvm-project/cfe/branches/release_80/docs/ReleaseNotes.rst?rev=351839&r1=351838&r2=351839&view=diff ============================================================================== --- cfe/branches/release_80/docs/ReleaseNotes.rst (original) +++ cfe/branches/release_80/docs/ReleaseNotes.rst Tue Jan 22 08:59:31 2019 @@ -233,12 +233,15 @@ ABI Changes in Clang OpenMP Support in Clang ---------------------------------- -- Support relational-op != (not-equal) as one of the canonical forms of random - access iterator. +- OpenMP 5.0 features -- Added support for mapping of the lambdas in target regions. - -- Added parsing/sema analysis for OpenMP 5.0 requires directive. + - Support relational-op != (not-equal) as one of the canonical forms of random + access iterator. + - Added support for mapping of the lambdas in target regions. + - Added parsing/sema analysis for the requires directive. + - Support nested declare target directives. + - Make the `this` pointer implicitly mapped as `map(this[:1])`. + - Added the `close` *map-type-modifier*. - Various bugfixes and improvements. @@ -250,6 +253,15 @@ New features supported for Cuda devices: - Fixed support for lastprivate/reduction variables in SPMD constructs. +- New collapse clause scheme to avoid expensive remainder operations. + +- New default schedule for distribute and parallel constructs. + +- Simplified code generation for distribute and parallel in SPMD mode. + +- Flag (``-fopenmp_optimistic_collapse``) for user to limit collapsed + loop counter width when safe to do so. + - General performance improvement. CUDA Support in Clang _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
