Allow HPushArgument to handle more than one argument.

src/arm64/lithium-arm64.cc

Index: src/arm64/lithium-arm64.cc
diff --git a/src/arm64/lithium-arm64.cc b/src/arm64/lithium-arm64.cc
index d6b4176e9f7a82e20e741b4ae7ccb20da04890a7..50e0f44cfefac8cdd185a552dfc5e8f5711bf2cd 100644
--- a/src/arm64/lithium-arm64.cc
+++ b/src/arm64/lithium-arm64.cc
@@ -1995,9 +1995,21 @@ LInstruction* LChunkBuilder::DoPower(HPower* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoPushArgument(HPushArgument* instr) {
-  LOperand* argument = UseRegister(instr->argument());
-  return new(zone()) LPushArgument(argument);
+LInstruction* LChunkBuilder::DoPushArguments(HPushArguments* instr) {
+  int argc = instr->OperandCount();
+  AddInstruction(new(zone()) LPreparePushArguments(argc), instr);
+
+  LPushArguments* push_args = new(zone()) LPushArguments(zone());
+
+  for (int i = 0; i < argc; ++i) {
+    if (push_args->ShouldSplitPush()) {
+      AddInstruction(push_args, instr);
+      push_args = new(zone()) LPushArguments(zone());
+    }
+    push_args->AddArgument(UseRegister(instr->argument(i)));
+  }
+
+  return push_args;
 }