[PATCH] D121765: [CUDA][HIP] Fix hostness check with -fopenmp

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl created this revision.
yaxunl added a reviewer: tra.
Herald added subscribers: carlosgalvezp, guansong.
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yaxunl requested review of this revision.
Herald added a reviewer: jdoerfert.
Herald added a subscriber: sstefan1.

CUDA/HIP determines whether a function can be called based on
the device/host attributes of callee and caller. Clang assumes the
caller is CurContext. This is correct in most cases, however, it is
not correct in OpenMP parallel region when CUDA/HIP program
is compiled with -fopenmp. This causes incorrect overloading
resolution and missed diagnostics.

To get the correct caller, clang needs to chase the parent chain
of DeclContext starting from CurContext until a function decl
or a lambda decl is reached. Sema API is adapted to achieve that
and used to determine the caller in hostness check.


https://reviews.llvm.org/D121765

Files:
  clang/include/clang/Sema/Sema.h
  clang/lib/Sema/Sema.cpp
  clang/lib/Sema/SemaCUDA.cpp
  clang/lib/Sema/SemaOverload.cpp
  clang/test/CodeGenCUDA/openmp-parallel.cu
  clang/test/SemaCUDA/openmp-parallel.cu

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