The Integer array allocation in the following test can be scalar replaced because the array is not escaping:

public class Test {

    public static Integer test() {
        Integer[] src = new Integer[10];
        src[0] = new Integer(42);
        Integer[] dst = (Integer[])src.clone();
        return dst[0];
    }

    public static void main(String[] args) {
        for (int i = 0; i < 100_000; ++i) {
            test();
        }
    }
}

Before JDK-8238759:
Scalar 351 CheckCastPP === 348 346 [[ 353 353 ]] #narrowoop: java/lang/Integer:exact *[int:10]:NotNull:exact *,iid=334 !jvms: Test::test @ bci:19
++++ Eliminated: 334 AllocateArray
Scalar 57 CheckCastPP === 54 52 [[ 161 161 63 63 ]] #narrowoop: java/lang/Integer:exact *[int:10]:NotNull:exact *,iid=40 !jvms: Test::test @ bci:2
++++ Eliminated: 40 AllocateArray

After JDK-8238759:
NotScalar (Object is passed as argument) 351 CheckCastPP === 348 346 [[ 358 370 370 ]] #narrowoop: java/lang/Integer:exact *[int:10]:NotNull:exact *,iid=334 !jvms: Test::test @ bci:19
  >>>> 358 ArrayCopy === 348 1 333 8 1 ( 57 61 351 61 357 _ _ _ _ ) [[ 359 361 ]] void ( java/lang/Object *, int, java/lang/Object *, int, int, int, int, BotPTR *+bot, BotPTR *+bot ) (oop array clone, tightly coupled allocation) !jvms: Test::test @ bci:19
NotScalar (Object is passed as argument) 57 CheckCastPP === 54 52 [[ 334 161 63 63 161 358 ]] #narrowoop: java/lang/Integer:exact *[int:10]:NotNull:exact *,iid=40 !jvms: Test::test @ bci:2
  >>>> 358 ArrayCopy === 348 1 333 8 1 ( 57 61 351 61 357 _ _ _ _ ) [[ 359 361 ]] void ( java/lang/Object *, int, java/lang/Object *, int, int, int, int, BotPTR *+bot, BotPTR *+bot ) (oop array clone, tightly coupled allocation) !jvms: Test::test @ bci:19
NotScalar (Object is passed as argument) 351 CheckCastPP === 348 346 [[ 358 370 370 ]] #narrowoop: java/lang/Integer:exact *[int:10]:NotNull:exact *,iid=334 !jvms: Test::test @ bci:19
  >>>> 358 ArrayCopy === 348 1 333 8 1 ( 57 61 351 61 357 _ _ _ _ ) [[ 359 361 ]] void ( java/lang/Object *, int, java/lang/Object *, int, int, int, int, BotPTR *+bot, BotPTR *+bot ) (oop array clone, tightly coupled allocation) !jvms: Test::test @ bci:19
NotScalar (Object is passed as argument) 57 CheckCastPP === 54 52 [[ 334 161 63 63 161 358 ]] #narrowoop: java/lang/Integer:exact *[int:10]:NotNull:exact *,iid=40 !jvms: Test::test @ bci:2
  >>>> 358 ArrayCopy === 348 1 333 8 1 ( 57 61 351 61 357 _ _ _ _ ) [[ 359 361 ]] void ( java/lang/Object *, int, java/lang/Object *, int, int, int, int, BotPTR *+bot, BotPTR *+bot ) (oop array clone, tightly coupled allocation) !jvms: Test::test @ bci:19