Ye Luo ffd159d8e9 [OpenMP] cmake option LIBOMPTARGET_NVPTX_MAX_SM for nvptx device RTL
It allows customizing MAX_SM for non-flagship GPU and reduces graphic memory usage.

In addition, so far the size is hard-coded up to __CUDA_ARCH__ 700 and is already a hassle for 800.
Introduce MAX_SM for 800 and protect future arch

Reviewed By: JonChesterfield

Differential Revision: https://reviews.llvm.org/D88185
2020-09-24 12:39:59 -04:00
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