bugfix in Alloc.perform(). This bug happen if their was inplace modification to…

bugfix in Alloc.perform(). This bug happen if their was inplace modification to the output of Alloc. It was not reset. Check how and when to use destroy_map to don't copy to it too often.

bugfix in Alloc.perform(). This bug happen if their was inplace modification to…
e684f824 · Frederic Bastien · c2b33a27 · e684f824
--- a/theano/tensor/basic.py
+++ b/theano/tensor/basic.py
@@ -1787,8 +1787,9 @@ class Alloc(gof.Op):
        v = inputs[0]
        sh = tuple([int(i) for i in inputs[1:]])
        if out[0] is None or out[0].shape != sh:
+#            out[0] = numpy.empty(sh, dtype=v.dtype)
            out[0] = numpy.zeros(sh, dtype=v.dtype)
-            out[0][...] += v # broadcast v to fill us up
+        out[0][...] = v # broadcast v to fill us up

    def grad(self, inputs, (gout,)):
        return [None for i in inputs]