Add type conversion for SP types

If Assignments are already typed for double-precision but the kernel is created for single-precision the assignments should be adapted.

pystencils/kernelcreation.py

@@ -12,7 +12,8 @@ from pystencils.gpucuda.indexing import indexing_creator_from_params
 from pystencils.simp.assignment_collection import AssignmentCollection
 from pystencils.stencil import direction_string_to_offset, inverse_direction_string
 from pystencils.transformations import (
-    loop_blocking, move_constants_before_loop, remove_conditionals_in_staggered_kernel)
+    loop_blocking, move_constants_before_loop, remove_conditionals_in_staggered_kernel,
+    replace_data_type_of_typed_symbols)
 
 
 def create_kernel(assignments,
@@ -88,6 +89,8 @@ def create_kernel(assignments,
             split_groups = assignments.simplification_hints['split_groups']
         assignments = assignments.all_assignments
 
+    assignments = replace_data_type_of_typed_symbols(assignments, data_type)
+
     # ----  Creating ast
     if target == 'cpu':
         from pystencils.cpu import create_kernel