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CUDA atomicrmw error on windows

See original GitHub issue

Reporting a bug

I am using the latest released version (0.50.0rc1) of Numba (most recent is visible in the change log (https://github.com/numba/numba/blob/master/CHANGE_LOG).
I have included below a minimal working reproducer (if you are unsure how to write one see http://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports).

@gmarkall

Looks the llvm patch did not fix the problem for windows.

======================================================================
ERROR: test_atomic_add_float (numba.cuda.tests.cudapy.test_atomics.TestCudaAtomics)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\path\lib\site-packages\numba\cuda\tests\cudapy\test_atomics.py", line 215, in test_atomic_add_float
    cuda_atomic_add_float = cuda.jit('void(float32[:])')(atomic_add_float)
  File "C:\path\lib\site-packages\numba\cuda\decorators.py", line 103, in kernel_jit
    kernel.bind()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 586, in bind
    self._func.get()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 462, in get
    ptx = self.ptx.get()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 433, in get
    **self._extra_options)
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 515, in llvm_to_ptx
    ptx = cu.compile(**opts)
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 232, in compile
    self._try_error(err, 'Failed to compile\n')
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 250, in _try_error
    self.driver.check_error(err, "%s\n%s" % (msg, self.get_log()))
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 140, in check_error
    raise exc
numba.cuda.cudadrv.error.NvvmError: Failed to compile

<unnamed> (50, 17): parse expected binary operation in atomicrmw
NVVM_ERROR_COMPILATION

======================================================================
ERROR: test_atomic_add_float_2 (numba.cuda.tests.cudapy.test_atomics.TestCudaAtomics)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\path\lib\site-packages\numba\cuda\tests\cudapy\test_atomics.py", line 227, in test_atomic_add_float_2
    cuda_atomic_add2 = cuda.jit('void(float32[:,:])')(atomic_add_float_2)
  File "C:\path\lib\site-packages\numba\cuda\decorators.py", line 103, in kernel_jit
    kernel.bind()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 586, in bind
    self._func.get()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 462, in get
    ptx = self.ptx.get()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 433, in get
    **self._extra_options)
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 515, in llvm_to_ptx
    ptx = cu.compile(**opts)
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 232, in compile
    self._try_error(err, 'Failed to compile\n')
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 250, in _try_error
    self.driver.check_error(err, "%s\n%s" % (msg, self.get_log()))
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 140, in check_error
    raise exc
numba.cuda.cudadrv.error.NvvmError: Failed to compile

<unnamed> (62, 18): parse expected binary operation in atomicrmw
NVVM_ERROR_COMPILATION

======================================================================
ERROR: test_atomic_add_float_3 (numba.cuda.tests.cudapy.test_atomics.TestCudaAtomics)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\path\lib\site-packages\numba\cuda\tests\cudapy\test_atomics.py", line 234, in test_atomic_add_float_3
    cuda_atomic_add3 = cuda.jit('void(float32[:,:])')(atomic_add_float_3)
  File "C:\path\lib\site-packages\numba\cuda\decorators.py", line 103, in kernel_jit
    kernel.bind()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 586, in bind
    self._func.get()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 462, in get
    ptx = self.ptx.get()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 433, in get
    **self._extra_options)
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 515, in llvm_to_ptx
    ptx = cu.compile(**opts)
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 232, in compile
    self._try_error(err, 'Failed to compile\n')
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 250, in _try_error
    self.driver.check_error(err, "%s\n%s" % (msg, self.get_log()))
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 140, in check_error
    raise exc
numba.cuda.cudadrv.error.NvvmError: Failed to compile

<unnamed> (62, 18): parse expected binary operation in atomicrmw
NVVM_ERROR_COMPILATION

======================================================================
ERROR: test_atomic_add_returns_old (numba.cuda.tests.cudapy.test_atomics.TestCudaAtomics)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\path\lib\site-packages\numba\cuda\tests\cudapy\test_atomics.py", line 489, in test_atomic_add_returns_old
    self._test_atomic_returns_old(kernel, 10)
  File "C:\path\lib\site-packages\numba\cuda\tests\cudapy\test_atomics.py", line 478, in _test_atomic_returns_old
    kernel[1, 1](x)
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 815, in __call__
    kernel = self.specialize(*args)
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 826, in specialize
    kernel = self.compile(argtypes)
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 845, in compile
    kernel.bind()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 586, in bind
    self._func.get()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 462, in get
    ptx = self.ptx.get()
  File "C:\path\lib\site-packages\numba\cuda\compiler.py", line 433, in get
    **self._extra_options)
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 515, in llvm_to_ptx
    ptx = cu.compile(**opts)
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 232, in compile
    self._try_error(err, 'Failed to compile\n')
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 250, in _try_error
    self.driver.check_error(err, "%s\n%s" % (msg, self.get_log()))
  File "C:\path\lib\site-packages\numba\cuda\cudadrv\nvvm.py", line 140, in check_error
    raise exc
numba.cuda.cudadrv.error.NvvmError: Failed to compile

<unnamed> (25, 17): parse expected binary operation in atomicrmw
NVVM_ERROR_COMPILATION

----------------------------------------------------------------------