ARM, ARM64: Optimize array copy

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index 830fc9152df8eb07031306fd4d354990012d5acb..a7b489474c753f230c7e40d1bda70d8bbcad73fe 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -2153,6 +2153,18 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoFillElements(HFillElements* instr) {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+LInstruction* LChunkBuilder::DoCopyElements(HCopyElements* instr) {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
   if (!instr->is_typed_elements()) {
     ASSERT(instr->elements()->representation().IsTagged());