Michael R. P. Ragazzon

OpenCL error with `CL_MISALIGNED_SUB_BUFFER_OFFSET`

4

Hello, and thanks for this amazing project. We are seeing Halide errors on some devices. They seem to originate from Halide's OpenCL call to `clCreateSubBuffer`: https://github.com/halide/Halide/blob/33d5ba9536f5aa6d3702c2c764b899a8f45b3b62/src/runtime/opencl.cpp#L1156 With `CL_MISALIGNED_SUB_BUFFER_OFFSET` being returned...

Add the parameter `intrinsics_source` to control how the intrinsics are determined. Add a new sample to demonstrate intrinsics and the new parameter. See README.md for more details.