Intrinsify System.ArrayCopy for Primitive data types

This patch implements System.ArrayCopy intrinsic for
byte and int data types

14% improvement in microbench below:

public static void time_System_arrayCopy_byte(int reps) {
        byte[] src = new byte[8192];
        for (int rep = 0; rep < reps; ++rep) {
            byte[] dst = new byte[8192];
            System.arraycopy(src, 0, dst, 0, 8192);
        }
    }
public static void time_System_arrayCopy_byte(int reps) {
        int[] src = new int[8192];
        for (int rep = 0; rep < reps; ++rep) {
            int[] dst = new int[8192];
            System.arraycopy(src, 0, dst, 0, 8192);
        }
    }

Time for base version:      4057 ms
Time for intrinsic version: 3487 ms

Test: ./art/test/testrunner/testrunner.py --host --optimizing
Signed-off-by: Shalini Salomi Bodapati <shalini.salomi.bodapati@intel.com>
Change-Id: I87aced30330d031efea04554c6fa0c05f84e3bb9

1 files changed, 4 insertions, 4 deletions

diff --git a/test/641-checker-arraycopy/src/Main.java b/test/641-checker-arraycopy/src/Main.java
index 939fc00b12..bede9026f7 100644
--- a/test/641-checker-arraycopy/src/Main.java
+++ b/test/641-checker-arraycopy/src/Main.java
@@ -22,8 +22,8 @@ public class Main {
   /// CHECK-START-X86: void Main.typedCopy(java.lang.Object, byte[]) disassembly (after)
   /// CHECK: InvokeStaticOrDirect method_name:java.lang.System.arraycopy intrinsic:SystemArrayCopy
   /// CHECK-NOT:    call
-  /// CHECK: InvokeStaticOrDirect method_name:java.lang.System.arraycopy intrinsic:SystemArrayCopy
-  /// CHECK:        call
+  /// CHECK: InvokeStaticOrDirect method_name:java.lang.System.arraycopy intrinsic:SystemArrayCopyByte
+  /// CHECK-NOT:    call
   /// CHECK: ReturnVoid
   public static void typedCopy(Object o, byte[] foo) {
     System.arraycopy(o, 1, o, 0, 1);
@@ -40,8 +40,8 @@ public class Main {
   /// CHECK-START-X86: void Main.untypedCopyCaller(java.lang.Object, byte[]) disassembly (after)
   /// CHECK: InvokeStaticOrDirect method_name:java.lang.System.arraycopy intrinsic:SystemArrayCopy
   /// CHECK-NOT:    call
-  /// CHECK: InvokeStaticOrDirect method_name:java.lang.System.arraycopy intrinsic:SystemArrayCopy
-  /// CHECK:        call
+  /// CHECK: InvokeStaticOrDirect method_name:java.lang.System.arraycopy intrinsic:SystemArrayCopyByte
+  /// CHECK-NOT:    call
   /// CHECK: ReturnVoid
   public static void untypedCopyCaller(Object o, byte[] array) {
     untypedCopy(o, array);