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* clang: Add -fconvergent-functions flagMatt Arsenault2019-11-191-0/+8
The CUDA builtin library is apparently compiled in C++ mode, so the assumption of convergent needs to be made in a typically non-SPMD language. The functions in the library should still be assumed convergent. Currently they are not, which is potentially incorrect and this happens to work after the library is linked.
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