[PATCH] D156743: clang/OpenCL: Add inline implementations of sqrt in builtin header

[Matt Arsenault via Phabricator via cfe-commits]

arsenm added inline comments.


================
Comment at: clang/lib/Headers/opencl-c-base.h:832
+
+inline float __ovld __cnfn sqrt(float __x) {
+  return __builtin_elementwise_sqrt(__x);
----------------
svenvh wrote:
> Anastasia wrote:
> > Is this a generic implementation enough? Would some targets not need to do something different for this built-in?
> > 
> > Ideally this header is to be kept light so I am a bit worried about adding definitions of the functions here. Otherwise we will end up in the same situation as we one day were with opencl-c.h. So could these be left there instead? It might be good to check with @svenvh if TableGen header has already a way to do this function forwarding or can be extended to do such a thing. Then it would be implementable in the both header mechanisms. I don't know if Sven has some other ideas or opinions...
> We did already discuss this a bit on the GitHub issue: https://github.com/llvm/llvm-project/issues/64264
As I mentioned on the ticket, it's only this one case so I'm not worried about adding a lot more to the base header. I think we can start by assuming llvm.sqrt always works correctly, I don't want to add more complexity to handle this case without a specific reason


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https://reviews.llvm.org/D156743