back end test for 'variable as function' call case

compiler/testData/codegen/functions/invoke.kt

@@ -0,0 +1,22 @@
+package invoke
+
+fun test1(predicate: (Int) -> Int, i: Int) = predicate(i)
+
+fun test2(predicate: (Int) -> Int, i: Int) = predicate.invoke(i)
+
+class Method {
+    fun invoke(i: Int) = i
+}
+
+fun test3(method: Method, i: Int) = method.invoke(i)
+
+//todo
+//fun test4(method: Method, i: Int) = method(i)
+
+fun box() : String {
+    if (test1({ it }, 1) != 1) return "fail 1"
+    if (test2({ it }, 2) != 2) return "fail 2"
+    if (test3(Method(), 3) != 3) return "fail 3"
+    //if (test4(Method(), 4) != 4) return "fail 4"
+    return "OK"
+}

compiler/tests/org/jetbrains/jet/codegen/FunctionGenTest.java

@@ -101,4 +101,8 @@ public class FunctionGenTest extends CodegenTestCase {
     public void testLocalFunction () throws InvocationTargetException, IllegalAccessException {
         blackBoxFile("functions/localFunction.kt");
     }
+
+    public void testInvoke() {
+        blackBoxFile("functions/invoke.kt");
+    }
 }