ARM, ARM64: Optimize array copy

src/x87/lithium-x87.cc

Index: src/x87/lithium-x87.cc
diff --git a/src/x87/lithium-x87.cc b/src/x87/lithium-x87.cc
index 707783d7f6616743495084dbec401e57603525ae..d5909b017b127d01dc0229729e0c039b5139880d 100644
--- a/src/x87/lithium-x87.cc
+++ b/src/x87/lithium-x87.cc
@@ -2193,6 +2193,18 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoFillElements(HFillElements* instr) {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+LInstruction* LChunkBuilder::DoCopyElements(HCopyElements* instr) {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
 LOperand* LChunkBuilder::GetStoreKeyedValueOperand(HStoreKeyed* instr) {
   ElementsKind elements_kind = instr->elements_kind();