[PATCH] D21989: [OpenCL] Improve diagnostics of OpenCL types

[Anastasia Stulova via cfe-commits]

Anastasia created this revision.
Anastasia added reviewers: bader, yaxunl.
Anastasia added a subscriber: cfe-commits.

This change:
1. Changes diagnostics for Blocks to be implicitly const qualified OpenCL v2.0 s6.12.5.
2. Adds and unifies diagnostics of some OpenCL special types: blocks, images, samplers, pipes. These types are intended for use with the OpenCL builtin function only and, therefore, most regular uses are not allowed including assignments, arithmetic operations, pointer dereferencing, etc...

http://reviews.llvm.org/D21989

Files:
  include/clang/Basic/DiagnosticSemaKinds.td
  lib/Sema/SemaDecl.cpp
  lib/Sema/SemaExpr.cpp
  lib/Sema/SemaType.cpp
  test/SemaOpenCL/invalid-block.cl
  test/SemaOpenCL/invalid-image.cl
  test/SemaOpenCL/invalid-pipes-cl2.0.cl
  test/SemaOpenCL/sampler_t.cl

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