Relu() on integer Tensors gives incorrect results on macOS #15634
Description
Seems to only happen on macOS, not linux. Repro:
>>> import torch
>>> print(torch.__version__)
1.0.0.dev20181227
>>> x = (torch.randn(4,4) * 10).long()
>>> x
tensor([[ 4, -6, 7, -2],
[-10, -2, 13, 0],
[ 1, -4, -17, 3],
[ 4, 2, -10, -9]])
>>> torch.relu(x)
tensor([[ 0, -6, 0, -2],
[-10, -2, 0, 0],
[ 0, -4, -17, 0],
[ 0, 0, -10, -9]])
relu() works fine on 1d tensors but not 2d.
Initially reported here