Fix opt warning/not moving to GPU some node.

theano/sandbox/gpuarray/blas.py

@@ -8,8 +8,8 @@ from theano.tensor.basic import as_tensor_variable
 from theano.tensor.opt import in2out
 
 from .basic_ops import as_gpuarray_variable, infer_context_name
-
 from .opt_util import inplace_allocempty
+from .type import GpuArrayType
 
 try:
     import pygpu
@@ -281,7 +281,12 @@ class GpuDot22(BlasOp):
         assert x.ndim == 2
         assert y.ndim == 2
         assert x.dtype == y.dtype
-        return Apply(self, [x, y], [x.type()])
+        otype = GpuArrayType(
+            dtype=x.dtype,
+            broadcastable=(x.type.broadcastable[0], y.type.broadcastable[1]),
+            # Here I suppose both inputs are on the same context.
+            context_name=x.type.context_name)
+        return Apply(self, [x, y], [otype()])
 
     def perform(self, node, inputs, outputs):
         x, y = inputs