[cfe-dev] [OpenCL] RFC: let Clang generate llvm atomic instructions for OpenCL atomic builtin functions

[Bader, Alexey via cfe-dev]

Hi Sam,

Could you clarify your idea?
At the moment clang doesn't provide any OpenCL built-in functions - they are provided by OpenCL implementation.
Clang provides C11 atomic built-ins<http://clang.llvm.org/docs/LanguageExtensions.html#c11-atomic-builtins> which should produce desired llvm atomic instructions.
This should work for OpenCL v2.0 atomics since they are taken from C11.

Thanks,
Alexey

From: Liu, Yaxun (Sam) [mailto:Yaxun.Liu at amd.com]
Sent: Thursday, March 3, 2016 11:37 PM
To: Bader, Alexey; 'anastasia.stulova at arm.com'; Pan, Xiuli; cfe-dev at lists.llvm.org
Cc: Sumner, Brian
Subject: RE: [OpenCL] RFC: let Clang generate llvm atomic instructions for OpenCL atomic builtin functions

Hi,

OpenCL atomic builtin functions are similar to llvm atomic instructions. It seems natural to represent OpenCL atomic builtin functions by LLVM atomic instructions.

Doing this can simplify implementation of OpenCL builtin library and have a unified representation for OpenCL atomic builtin functions.

Any feedback? Thanks.

Sam

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