[PATCH] D102801: [CUDA][HIP] Fix implicit constant variable

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl created this revision.
yaxunl added a reviewer: tra.
Herald added a reviewer: aaron.ballman.
yaxunl requested review of this revision.

constexpr variables are implicit constant variables in device compilation.
Not all constexpr variables are valid to be emitted on device side, therefore
we should not force emit implicit constant variables even if they are
ODR-used by host code.

This fixes the regression caused by https://reviews.llvm.org/D102237


https://reviews.llvm.org/D102801

Files:
  clang/lib/CodeGen/CodeGenModule.cpp
  clang/lib/Sema/SemaCUDA.cpp
  clang/lib/Sema/SemaDeclAttr.cpp
  clang/test/AST/ast-dump-constant-var.cu
  clang/test/CodeGenCUDA/host-used-device-var.cu

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