Added error message

pystencils/cpu/vectorization.py

@@ -178,6 +178,11 @@ def vectorize_inner_loops_and_adapt_load_stores(ast_node, assume_aligned, nontem
         for indexed in loop_node.atoms(sp.Indexed):
             base, index = indexed.args
             if loop_counter_symbol in index.atoms(sp.Symbol):
+                if not isinstance(vector_width, int):
+                    error_message = "NotImplemented: For instruction sets with variable vector size the aligned and " \
+                                    "unaligned load and strore instructions must match."
+                    assert ast_node.instruction_set['loadA'] == ast_node.instruction_set['loadU'], error_message
+                    assert ast_node.instruction_set['storeU'] == ast_node.instruction_set['storeA'], error_message
                 loop_counter_is_offset = loop_counter_symbol not in (index - loop_counter_symbol).atoms()
                 aligned_access = (index - loop_counter_symbol).subs(zero_loop_counters) % vector_width == 0
                 stride = sp.simplify(index.subs({loop_counter_symbol: loop_counter_symbol + 1}) - index)