[all-commits] [llvm/llvm-project] 095cec: [OpenMP] `omp begin/end declare variant` - part 1, ...

[Johannes Doerfert via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 095cecbe0ded16f2e66435d938fdc3cb1869713f
      https://github.com/llvm/llvm-project/commit/095cecbe0ded16f2e66435d938fdc3cb1869713f
  Author: Johannes Doerfert <johannes at jdoerfert.de>
  Date:   2020-03-27 (Fri, 27 Mar 2020)

  Changed paths:
    M clang/include/clang/AST/OpenMPClause.h
    M clang/include/clang/Basic/DiagnosticParseKinds.td
    M clang/include/clang/Parse/Parser.h
    M clang/lib/AST/OpenMPClause.cpp
    M clang/lib/Basic/OpenMPKinds.cpp
    M clang/lib/CodeGen/CGOpenMPRuntime.cpp
    M clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
    M clang/lib/Parse/ParseOpenMP.cpp
    M clang/lib/Sema/SemaOpenMP.cpp
    A clang/test/AST/ast-dump-openmp-begin-declare-variant.c
    A clang/test/OpenMP/begin-declare-variant_no_end_for_matching_selector.c
    A clang/test/OpenMP/begin_declare_variant_messages.c
    M clang/test/OpenMP/declare_variant_messages.c
    M clang/test/OpenMP/declare_variant_messages.cpp
    M llvm/include/llvm/Frontend/OpenMP/OMPKinds.def
    M llvm/lib/Frontend/OpenMP/OMPContext.cpp

  Log Message:
  -----------
  [OpenMP] `omp begin/end declare variant` - part 1, parsing

This is the first part extracted from D71179 and cleaned up.

This patch provides parsing support for `omp begin/end declare variant`,
as defined in OpenMP technical report 8 (TR8) [0].

A major purpose of this patch is to provide proper math.h/cmath support
for OpenMP target offloading. See PR42061, PR42798, PR42799. The current
code was developed with this feature in mind, see [1].

[0] https://www.openmp.org/wp-content/uploads/openmp-TR8.pdf
[1] https://reviews.llvm.org/D61399#change-496lQkg0mhRN

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D74941