[PATCH] D120254: [OpenCL] Align subgroup builtin guards

[Sven van Haastregt via Phabricator via cfe-commits]

svenvh marked an inline comment as done.
svenvh added inline comments.


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Comment at: clang/lib/Headers/opencl-c-base.h:85
+// Internal feature macro to provide subgroup builtins.
+#define __opencl_subgroup_builtins 1
+#endif
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azabaznov wrote:
> svenvh wrote:
> > I'm in doubt whether we could just reuse `__opencl_c_subgroups` for this?
> I think we couldn't. Those subgroup features/extensions are different, as implementation may support the extension but not the feature. The difference is in subgroup independent forward progress: for example, it's required by the extension, but optional in OpenCL C 3.0 feature.
Thanks for confirming, I will keep the separate internal feature macro then.


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  https://reviews.llvm.org/D120254/new/

https://reviews.llvm.org/D120254