Pretenure call new support.

src/ia32/macro-assembler-ia32.cc

 // Copyright 2012 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 1019 matching lines @@
     Check(not_equal, kOperandIsASmiAndNotAName);
     push(object);
     mov(object, FieldOperand(object, HeapObject::kMapOffset));
     CmpInstanceType(object, LAST_NAME_TYPE);
     pop(object);
     Check(below_equal, kOperandIsNotAName);
   }
 }
 
 
+void MacroAssembler::AssertUndefinedOrAllocationSite(Register object) {
+  if (emit_debug_code()) {
+    Label done_checking;
+    AssertNotSmi(object);
+    cmp(object, isolate()->factory()->undefined_value());
+    j(equal, &done_checking);
+    cmp(FieldOperand(object, 0),
+        Immediate(isolate()->factory()->allocation_site_map()));
+    Assert(equal, kExpectedUndefinedOrCell);
+    bind(&done_checking);
+  }
+}
+
+
 void MacroAssembler::AssertNotSmi(Register object) {
   if (emit_debug_code()) {
     test(object, Immediate(kSmiTagMask));
     Check(not_equal, kOperandIsASmi);
   }
 }
 
 
 void MacroAssembler::Prologue(PrologueFrameMode frame_mode) {
   if (frame_mode == BUILD_STUB_FRAME) {
@@ skipping 2593 matching lines @@
   cmp(scratch1, Immediate(DICTIONARY_ELEMENTS));
   j(equal, found);
   mov(current, FieldOperand(current, Map::kPrototypeOffset));
   cmp(current, Immediate(factory->null_value()));
   j(not_equal, &loop_again);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32