[PATCH] D46501: [OpenCL] Guard all half float usage based on cl_khr_fp16 extension

[Anastasia Stulova via Phabricator via cfe-commits]

Anastasia added a comment.

In https://reviews.llvm.org/D46501#1089777, @yaxunl wrote:

> Only halfn type requires cl_khr_fp16. These functions do not use halfn type, therefore cl_khr_fp16 is not required.


I think the extension is for all half https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/cl_khr_fp16.html

  This extension adds support for half scalar and vector types as built-in types that can be used for arithmetic operations, conversions, etc. An application that wants to use half and halfn types will need to include the directive shown above.
  
   


Repository:
  rC Clang

https://reviews.llvm.org/D46501