[PATCH] D119858: [OpenCL] Guard 64-bit atomic types

[Sven van Haastregt via Phabricator via cfe-commits]

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Until now, overloads with a 64-bit atomic type argument were always
made available with `-fdeclare-opencl-builtins`.  Ensure these
overloads are only available when both the `cl_khr_int64_base_atomics`
and `cl_khr_int64_extended_atomics` extensions have been enabled, as
required by the OpenCL specification.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D119858

Files:
  clang/lib/Sema/OpenCLBuiltins.td
  clang/test/SemaOpenCL/fdeclare-opencl-builtins.cl
  clang/utils/TableGen/ClangOpenCLBuiltinEmitter.cpp

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