fix GpuCoutiguous(add view_map member) and make its c_code cachable.

theano/sandbox/cuda/basic_ops.py

@@ -1895,13 +1895,19 @@ class GpuAlloc(Op):
 gpu_alloc = GpuAlloc()
 
 class GpuContiguous(Op):
-    def make_node(self, input):
-        input = as_cuda_ndarray_variable(input)
-        return Apply(self, [input], [input.type()])
+    view_map = {0: [0]}
 
+    def __eq__(self, other):
+        return type(self) == type(other)
+    def __hash__(self):
+        return hash(type(self))
     def __str__(self):
         return self.__class__.__name__
 
+    def make_node(self, input):
+        input = as_cuda_ndarray_variable(input)
+        return Apply(self, [input], [input.type()])
+
     def c_code(self, node, name, (input,), (z,), sub):
         fail = sub['fail']
         str = """
@@ -1929,6 +1935,9 @@ class GpuContiguous(Op):
         """%locals()
         return str
 
+    def c_code_cache_version(self):
+        return (1,)
+
 gpu_contiguous = GpuContiguous()
 
 # Those are predifined CudaNdarrayType as done in tensor.basic