correctness/atomics.cpp fails with CUDAVectorize engine

[alexreinking]

When running correctness/atomics.cpp with cuda enabled, llvm 9.0.1, and using the CMake build, the following happens:

alex@alex-ubuntu:~/Development/Halide/cmake-build-debug$ ./bin/correctness_atomics 
Error:
Line 244: Expected 77 instead of 76
Aborted (core dumped)

The CMake build is necessary because it defines LLVM_VERSION=90, whereas the Makefile doesn't.

HL_[JIT_]TARGET=x86-64-linux-cuda

[shoaibkamil]

Relatedly, this seems to be failing windows buildbots as well.

[alexreinking]

#4683 disabled these tests. Code comments suggest #4628 will provide a fix.

[alexreinking]

Since #4628 landed, I wonder if these tests work again?

Halide/test/correctness/atomics.cpp

Lines 1249 to 1255 in 26ebef3

	// TODO: Broken currently; commented out until https://github.com/halide/Halide/pull/4628 lands
	// test_all<uint32_t>(Backend::CUDAVectorize);
	// test_all<int32_t>(Backend::CUDAVectorize);
	// test_all<float>(Backend::CUDAVectorize);
	// test_all<uint64_t>(Backend::CUDAVectorize);
	// test_all<int64_t>(Backend::CUDAVectorize);
	// test_all<double>(Backend::CUDAVectorize);