Applied restrictions from OpenCL v2.0 s6.13.11.8
that mainly disallow operations on atomic types (except for taking their address - &).
The patch is taken from SPIR2.0 provisional branch, contributed by Guy Benyei!
llvm-svn: 248896
OpenCL C Spec v2.0 Section 6.13.11
- Made c11 _Atomic being not accepted for OpenCL
- Implemented CL2.0 atomics by aliasing them to the corresponding c11 atomic types using implicit typedef
- Added diagnostics for atomics Khronos extension enabling
llvm-svn: 232631
OpenCL C Spec v2.0 Section 6.13.11
- Made c11 _Atomic being accepted only for c11 compilations
- Implemented CL2.0 atomics by aliasing them to the corresponding c11 atomic types using implicit typedef
- Added diagnostics for atomics Khronos extension enabling
llvm-svn: 231932