[PATCH] D17779: [CUDA] Emit host-side 'shadows' for device-side global variables

[Artem Belevich via cfe-commits]

tra created this revision.
tra added reviewers: jlebar, jingyue.
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.. and register them with CUDA runtime.

This is needed for commonly used cudaMemcpy*() APIs that use address of host-side shadow to access their counterparts on device side.

Fixes PR26340.

http://reviews.llvm.org/D17779

Files:
  lib/CodeGen/CGCUDANV.cpp
  lib/CodeGen/CGCUDARuntime.h
  lib/CodeGen/CodeGenModule.cpp
  test/CodeGenCUDA/device-stub.cu
  test/CodeGenCUDA/filter-decl.cu

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