llvm

9ad5e4b3 - [SYCL][NVPTX][AMDGPU] Use __builtin_nearbyint in cmath wrapper (#21971)

[SYCL][NVPTX][AMDGPU] Use __builtin_nearbyint in cmath wrapper (#21971) Instead of using `__nv_nearbyint` and `__ocml_nearbyint` from device libraries, use `__builtin_nearbyint` in the cmath wrapper. Both targets have native support for nearbyint so we don't need to call out to the device library. Both CUDA and HIP compilation already does this in `__clang_{cuda,hip}_math.h`. We can then also remove `SYCL_EXTERNAL` use from this header, to fix #21652. Fixes #21652.