Make closures optimizable by Crankshaft compiler.

src/arm/lithium-codegen-arm.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1386 matching lines @@
 }
 
 
 void LCodeGen::DoStoreGlobal(LStoreGlobal* instr) {
   Register value = ToRegister(instr->input());
   __ mov(ip, Operand(Handle<Object>(instr->hydrogen()->cell())));
   __ str(value, FieldMemOperand(ip, JSGlobalPropertyCell::kValueOffset));
 }
 
 
+void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) {
+#if 0
+  // TODO(antonm): load a context with a separate instruction.
+  Register result = ToRegister(instr->result());
+  HLoadContextSlot* hinstr = instr->hydrogen();
+  Handle<Context> context = hinstr->context();
+  Comment(";;; Load context slot %d out of %p", hinstr->index(), *context);
+  if (Heap::InNewSpace(*context)) {
+    Handle<JSGlobalPropertyCell> cell =
+        Factory::NewJSGlobalPropertyCell(context);
+    __ mov(result, Operand::Cell(cell));
+  } else {
+    __ mov(result, context);
+  }
+  __ mov(result, Operand(result, Context::SlotOffset(hinstr->index())));
+#else
+  Abort("DoLoadContextSlot unimplemented");
+#endif
+}
+
+
 void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
   Abort("DoLoadNamedField unimplemented.");
 }
 
 
 void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) {
   ASSERT(ToRegister(instr->object()).is(r0));
   ASSERT(ToRegister(instr->result()).is(r0));
 
   // Name is always in r2.
@@ skipping 721 matching lines @@
 
 
 void LCodeGen::DoOsrEntry(LOsrEntry* instr) {
   Abort("DoOsrEntry unimplemented.");
 }
 
 
 #undef __
 
 } }  // namespace v8::internal