Version 2.5.8...

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
===================================================================
--- src/arm/full-codegen-arm.cc	(revision 5873)
+++ src/arm/full-codegen-arm.cc	(working copy)
@@ -860,18 +860,23 @@
 }
 
 
-void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info) {
+void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
+                                       bool pretenure) {
   // Use the fast case closure allocation code that allocates in new
   // space for nested functions that don't need literals cloning.
-  if (scope()->is_function_scope() && info->num_literals() == 0) {
+  if (scope()->is_function_scope() &&
+      info->num_literals() == 0 &&
+      !pretenure) {
     FastNewClosureStub stub;
     __ mov(r0, Operand(info));
     __ push(r0);
     __ CallStub(&stub);
   } else {
     __ mov(r0, Operand(info));
-    __ Push(cp, r0);
-    __ CallRuntime(Runtime::kNewClosure, 2);
+    __ LoadRoot(r1, pretenure ? Heap::kTrueValueRootIndex
+                              : Heap::kFalseValueRootIndex);
+    __ Push(cp, r0, r1);
+    __ CallRuntime(Runtime::kNewClosure, 3);
   }
   context()->Plug(r0);
 }
@@ -2772,6 +2777,13 @@
 }
 
 
+void FullCodeGenerator::EmitFastAsciiArrayJoin(ZoneList<Expression*>* args) {
+  __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
+  context()->Plug(r0);
+  return;
+}
+
+
 void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
   Handle<String> name = expr->name();
   if (name->length() > 0 && name->Get(0) == '_') {