Markus Holzer
--- a/pystencils/transformations.py
+++ b/pystencils/transformations.py
    move_constants_before_loop(function_node.body)
    cleanup_blocks(function_node.body)

+def replace_data_type_of_typed_symbols(assignments, data_type):
+    """changes the data types of the lhs of assignments which are already specified as TypedSymbol. This is needed
+       if the Assignments are already typed to double but the kernel is created for single precision"""
+    for i, assignment in enumerate(assignments):
+        if type(assignment.lhs) is TypedSymbol and assignment.lhs.dtype != data_type:
+            assignments[i] = Assignment(TypedSymbol(assignments[i].lhs.name, data_type), assignments[i].rhs)