[PATCH] D23037: [CUDA] Fix libdevice selection.

[Artem Belevich via cfe-commits]

tra updated this revision to Diff 66579.
tra added a comment.

Now that https://reviews.llvm.org/D23042 / r277537 makes sure that CudaToolchain is only used on device side, we can 
remove defaults for -march and restore asserts() ensuring that -march is added by the driver.


https://reviews.llvm.org/D23037

Files:
  include/clang/Basic/DiagnosticDriverKinds.td
  lib/Driver/ToolChains.cpp
  test/Driver/Inputs/CUDA_80/usr/local/cuda/nvvm/libdevice/libdevice.compute_30.10.bc
  test/Driver/cuda-detect.cu

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