55 lines
2.0 KiB
Python
55 lines
2.0 KiB
Python
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from numba.cuda.cudadrv import nvvm
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from numba.cuda.testing import skip_on_cudasim
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from numba.core import utils
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from llvmlite import ir
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from llvmlite import binding as llvm
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import unittest
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original = "call void @llvm.memset.p0i8.i64(" \
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"i8* align 4 %arg.x.41, i8 0, i64 %0, i1 false)"
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missing_align = "call void @llvm.memset.p0i8.i64(" \
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"i8* %arg.x.41, i8 0, i64 %0, i1 false)"
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@skip_on_cudasim('libNVVM not supported in simulator')
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@unittest.skipIf(utils.MACHINE_BITS == 32, "CUDA not support for 32-bit")
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@unittest.skipIf(not nvvm.is_available(), "No libNVVM")
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class TestNvvmWithoutCuda(unittest.TestCase):
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def test_nvvm_accepts_encoding(self):
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# Test that NVVM will accept a constant containing all possible 8-bit
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# characters. Taken from the test case added in llvmlite PR #53:
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#
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# https://github.com/numba/llvmlite/pull/53
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#
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# This test case is included in Numba to ensure that the encoding used
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# by llvmlite (e.g. utf-8, latin1, etc.) does not result in an input to
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# NVVM that it cannot parse correctly
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# Create a module with a constant containing all 8-bit characters
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c = ir.Constant(ir.ArrayType(ir.IntType(8), 256),
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bytearray(range(256)))
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m = ir.Module()
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m.triple = 'nvptx64-nvidia-cuda'
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nvvm.add_ir_version(m)
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gv = ir.GlobalVariable(m, c.type, "myconstant")
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gv.global_constant = True
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gv.initializer = c
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m.data_layout = nvvm.NVVM().data_layout
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# Parse with LLVM then dump the parsed module into NVVM
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parsed = llvm.parse_assembly(str(m))
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ptx = nvvm.llvm_to_ptx(str(parsed))
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# Ensure all characters appear in the generated constant array.
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elements = ", ".join([str(i) for i in range(256)])
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myconstant = f"myconstant[256] = {{{elements}}}".encode('utf-8')
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self.assertIn(myconstant, ptx)
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if __name__ == '__main__':
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unittest.main()
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