[PATCH] D67294: Register and parse a simplified version of '#pragma omp declare variant'

[Andrzej Warzynski via Phabricator via cfe-commits]

andwar created this revision.
andwar added a reviewer: ABataev.
Herald added a reviewer: jdoerfert.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

  This patch implements the basic parsing and semantic analysis of
  `#pragma omp declare variant`:
    * registers '#pragma omp declare variant' alongside other OpenMP
    pragmas
    * parses the 'variant(variant-func-id)' clause and verifies that
    'variant-func-id' corresponds to a previously declared function
    * template-is as 'variant-func-id' is not supported
    * '#pragma omp declare variant` is not allowed in front of template
    declarations.
  
  Note that this patch will only parse a subset of the required clauses,
  e.g. 'variant(variant-func-id)'. Any remaining tokens before
  'tok::annot_pragma_openmp_end' are ignored.  As per OpenMP 5 spec, this
  form of '#pragma omp declare variant' is incomplete and invalid and will
  be rejected with an error once the implementation is complete. In the
  meantime, this reduced form is treated as valid.


Repository:
  rC Clang

https://reviews.llvm.org/D67294

Files:
  include/clang/Basic/Attr.td
  include/clang/Basic/DiagnosticParseKinds.td
  include/clang/Basic/DiagnosticSemaKinds.td
  include/clang/Basic/OpenMPKinds.def
  include/clang/Parse/Parser.h
  include/clang/Sema/Sema.h
  lib/Basic/OpenMPKinds.cpp
  lib/CodeGen/CGOpenMPRuntime.cpp
  lib/Parse/ParseOpenMP.cpp
  lib/Sema/SemaOpenMP.cpp
  test/AST/dump.cpp
  test/OpenMP/declare_variant_ast_print.c
  test/OpenMP/declare_variant_messages.cpp

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