Replace is Array<T> with .isArrayOf<T>()

compiler/testData/codegen/box/arrays/kt602.kt

@@ -1,2 +0,0 @@
-fun box() = if(arrayOfNulls<Int>(10) is Array<java.lang.Integer>) "OK" else "fail"
-

compiler/testData/codegen/box/controlStructures/forInSmartCastToArray.kt

@@ -1,5 +1,5 @@
-fun f(x: Any?): String {
-    if (x is Array<String>) {
+fun f(x: Any?): Any? {
+    if (x is Array<*>) {
         for (i in x) {
             return i
         }
@@ -10,5 +10,5 @@ fun f(x: Any?): String {
 fun box(): String {
     val a = arrayOfNulls<String>(1) as Array<String>
     a[0] = "OK"
-    return f(a)
+    return f(a) as String
 }

compiler/testData/codegen/boxWithStdlib/arrays/kt602.kt

@@ -0,0 +1,2 @@
+fun box() = if(arrayOfNulls<Int>(10).isArrayOf<java.lang.Integer>()) "OK" else "fail"
+

compiler/testData/codegen/boxWithStdlib/arrays/kt7338.kt

@@ -1,5 +1,5 @@
 fun foo(x : Any): String {
-    return if(x is Array<String>) x[0] else "fail"
+    return if(x is Array<*> && x.isArrayOf<String>()) (x as Array<String>)[0] else "fail"
 }
 
 fun box(): String {

compiler/testData/codegen/boxWithStdlib/toArray/copyToArray.kt

@@ -2,7 +2,7 @@ import java.util.Arrays
 
 fun box(): String {
     val array = Arrays.asList(2, 3, 9).toTypedArray()
-    if (array !is Array<Int>) return array.javaClass.toString()
+    if (!array.isArrayOf<Int>()) return array.javaClass.toString()
 
     val str = Arrays.toString(array)
     if (str != "[2, 3, 9]") return str

compiler/testData/codegen/boxWithStdlib/toArray/toArray.kt

@@ -8,8 +8,8 @@ fun box(): String {
     val array1 = collection.toArray()
     val array2 = collection.toArray(arrayOfNulls<Int>(3) as Array<Int>)
 
-    if (array1 !is Array<Any>) return (array1 as Object).getClass().toString()
-    if (array2 !is Array<Int>) return (array2 as Object).getClass().toString()
+    if (!array1.isArrayOf<Any>()) return (array1 as Object).getClass().toString()
+    if (!array2.isArrayOf<Int>()) return (array2 as Object).getClass().toString()
 
     val s1 = Arrays.toString(array1)
     val s2 = Arrays.toString(array2)

compiler/testData/codegen/boxWithStdlib/toArray/toArrayAlreadyPresent.kt

@@ -23,8 +23,8 @@ fun box(): String {
     val array1 = collection.toArray()
     val array2 = collection.toArray(arrayOfNulls<Int>(3) as Array<Int>)
 
-    if (array1 !is Array<Any>) return (array1 as Object).getClass().toString()
-    if (array2 !is Array<Int>) return (array2 as Object).getClass().toString()
+    if (!array1.isArrayOf<Any>()) return (array1 as Object).getClass().toString()
+    if (!array2.isArrayOf<Int>()) return (array2 as Object).getClass().toString()
 
     val s1 = Arrays.toString(array1)
     val s2 = Arrays.toString(array2)

compiler/testData/codegen/bytecodeText/isArrayOf.kt

@@ -0,0 +1,3 @@
+fun f(x: Any): Boolean = x is Array<*> && x.isArrayOf<String>()
+
+// 2 INSTANCEOF