Implement ES6 rest parameters

src/arm64/full-codegen-arm64.cc

Index: src/arm64/full-codegen-arm64.cc
diff --git a/src/arm64/full-codegen-arm64.cc b/src/arm64/full-codegen-arm64.cc
index dd47e0f1639d8d60957a4dbccc5673f1011cb09f..7342038af014df3c36ba379ec9ee3d83edc5fef3 100644
--- a/src/arm64/full-codegen-arm64.cc
+++ b/src/arm64/full-codegen-arm64.cc
@@ -241,6 +241,25 @@ void FullCodeGenerator::Generate() {
     }
   }
 
+  // Possibly allocate RestParameters
+  int rest_index;
+  Variable* rest_param = scope()->rest_parameter(&rest_index);
+  if (rest_param) {
+    Comment cmnt(masm_, "[ Allocate rest parameter array");
+
+    int num_parameters = info->scope()->num_parameters();
+    int offset = num_parameters * kPointerSize;
+    __ Add(x3, fp, StandardFrameConstants::kCallerSPOffset + offset);
+    __ Mov(x2, Smi::FromInt(num_parameters));
+    __ Mov(x1, Smi::FromInt(rest_index));
+    __ Push(x3, x2, x1);
+
+    RestParamAccessStub stub(isolate());
+    __ CallStub(&stub);
+
+    SetVar(rest_param, x0, x1, x2);
+  }
+
   Variable* arguments = scope()->arguments();
   if (arguments != NULL) {
     // Function uses arguments object.
@@ -267,7 +286,7 @@ void FullCodeGenerator::Generate() {
             ? ArgumentsAccessStub::HAS_NEW_TARGET
             : ArgumentsAccessStub::NO_NEW_TARGET;
     ArgumentsAccessStub::Type type;
-    if (is_strict(language_mode())) {
+    if (is_strict(language_mode()) || !is_simple_parameter_list()) {
       type = ArgumentsAccessStub::NEW_STRICT;
     } else if (function()->has_duplicate_parameters()) {
       type = ArgumentsAccessStub::NEW_SLOPPY_SLOW;