[PATCH] D85877: [OpenMP] Support nested OpenMP context selectors (declare variant)

[Johannes Doerfert via Phabricator via cfe-commits]

jdoerfert created this revision.
jdoerfert added reviewers: JonChesterfield, jhuber6, ABataev.
Herald added subscribers: guansong, bollu, yaxunl.
Herald added a project: clang.
jdoerfert requested review of this revision.
Herald added a subscriber: sstefan1.

Due to `omp begin/end declare variant`, OpenMP context selectors can be
nested. This patch adds initial support for this so we can use it for
target math variants. We should improve the detection of "equivalent"
scores and user conditions, we should also revisit the data structures
of the OMPTraitInfo object, however, both are not pressing issues right
now.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D85877

Files:
  clang/include/clang/Basic/DiagnosticParseKinds.td
  clang/include/clang/Basic/DiagnosticSemaKinds.td
  clang/include/clang/Parse/Parser.h
  clang/include/clang/Sema/Sema.h
  clang/lib/Parse/ParseOpenMP.cpp
  clang/lib/Sema/SemaOpenMP.cpp
  clang/test/AST/ast-dump-openmp-begin-declare-variant_nested.c
  clang/test/OpenMP/declare_variant_messages.c

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