Tests for "while" and "do-while" loop generation

backend.native/tests/codegen/cycles/cycle_do-test.c

@@ -0,0 +1,11 @@
+extern void *resolve_symbol(const char*);
+
+int
+run_test() {
+  int (*cycle_do)(int) = resolve_symbol("kfun:cycle_do");
+
+  if (cycle_do(3) != 5) return 1;
+  if (cycle_do(0) != 3) return 1;
+
+  return 0;
+}