[PATCH] D59603: [PR40707][PR41011][OpenCL] Allow addr space spelling without double underscore in C++ mode

[Anastasia Stulova via Phabricator via cfe-commits]

Anastasia created this revision.
Anastasia added reviewers: svenvh, rjmccall.
Herald added subscribers: jdoerfert, ebevhan, yaxunl.

For backwards compatibility we should allow alternative spelling of address spaces - `private`, `local`, `global`, `constant`, `generic`.

Note that in order to accept `private` correctly parsing has been changed to understand two different use cases - access specifier vs address space.

This fixes the issues reported in the bugs.

The header from libclc is compiled successfully.


https://reviews.llvm.org/D59603

Files:
  include/clang/Basic/TokenKinds.def
  lib/Parse/ParseDecl.cpp
  lib/Parse/ParseDeclCXX.cpp
  lib/Parse/ParseTentative.cpp
  test/Parser/opencl-cxx-keywords.cl

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