Implement ES6 rest parameters

src/mips64/full-codegen-mips64.cc

Index: src/mips64/full-codegen-mips64.cc
diff --git a/src/mips64/full-codegen-mips64.cc b/src/mips64/full-codegen-mips64.cc
index 035113a691946ca8057cc3bac6f63d8fd18666af..67e4aaed35202a8842bd5ee484ac51de72dfba56 100644
--- a/src/mips64/full-codegen-mips64.cc
+++ b/src/mips64/full-codegen-mips64.cc
@@ -245,6 +245,27 @@ 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;
+    __ Daddu(a3, fp,
+           Operand(StandardFrameConstants::kCallerSPOffset + offset));
+    __ li(a2, Operand(Smi::FromInt(num_parameters)));
+    __ li(a1, Operand(Smi::FromInt(rest_index)));
+    __ Push(a3, a2, a1);
+
+    RestParamAccessStub stub(isolate());
+    __ CallStub(&stub);
+
+    SetVar(rest_param, v0, a1, a2);
+  }
+
   Variable* arguments = scope()->arguments();
   if (arguments != NULL) {
     // Function uses arguments object.
@@ -272,7 +293,7 @@ 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;