[PATCH] D16928: [OpenCL] Apply missing restrictions for Blocks in OpenCL v2.0

[Anastasia Stulova via cfe-commits]

Anastasia created this revision.
Anastasia added reviewers: pekka.jaaskelainen, pxli168.
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Applying the following restrictions for block variables in OpenCL (v2.0 s6.12.5):

- __block storage class is disallowed
- variadic arguments are disallowed
- every block declaration must be const qualified and initialized
- a block can't be used as a return type of a function
- extern speficier is disallowed

This adds diagnostics missing from http://reviews.llvm.org/D16047

Repository:
  rL LLVM

http://reviews.llvm.org/D16928

Files:
  include/clang/Basic/DiagnosticSemaKinds.td
  lib/Sema/SemaDecl.cpp
  lib/Sema/SemaType.cpp
  test/CodeGen/blocks-opencl.cl
  test/SemaOpenCL/event_t.cl
  test/SemaOpenCL/invalid-blocks-cl20.cl
  test/SemaOpenCL/invalid-func.cl
  test/SemaOpenCL/invalid-kernel-parameters.cl
  test/SemaOpenCL/sampler_t.cl

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