oops, actually have to test the truth value of the predicates!

loopy/kernel/creation.py

@@ -858,7 +858,7 @@ def parse_instructions(instructions, defines):
             obj = insn_options_stack.pop()
             #if this object is the end of an if statement
             if obj['predicates'] == if_predicates_stack[-1]["insn_predicates"] and\
-                if_predicates_stack[-1]:
+                if_predicates_stack[-1]["insn_predicates"]:
                 if_predicates_stack.pop()
             continue