Test for cast added

backend.native/tests/build.gradle

@@ -179,6 +179,10 @@ task local_variable(type: UnitKonanTest) {
     source = "codegen/basics/local_variable.kt"
 }
 
+task cast_simple(type: UnitKonanTest) {
+    source = "codegen/basics/cast_simple.kt"
+}
+
 task hello0(type: RunKonanTest) {
     goldValue = "Hello, world!\n"
     source = "runtime/basic/hello0.kt"

backend.native/tests/codegen/basics/cast_simple-test.c

@@ -0,0 +1,10 @@
+extern void *resolve_symbol(const char*);
+
+int
+run_test() {
+  int (*castTest)() = resolve_symbol("kfun:castTest()");
+
+  if (!castTest()) return 1;
+
+  return 0;
+}

backend.native/tests/codegen/basics/cast_simple.kt

@@ -0,0 +1,10 @@
+open class A() {}
+class B(): A() {}
+
+fun castSimple(o: Any) : A = o as A
+
+fun castTest(): Boolean {
+  val b = B()
+  castSimple(b)
+  return true
+}