Macro assembler functions for pretenure call new.

src/a64/macro-assembler-a64.cc

 // Copyright 2013 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 1510 matching lines @@
     UseScratchRegisterScope temps(this);
     Register temp = temps.AcquireX();
 
     Ldr(temp, FieldMemOperand(object, HeapObject::kMapOffset));
     CompareInstanceType(temp, temp, LAST_NAME_TYPE);
     Check(ls, kOperandIsNotAName);
   }
 }
 
 
+void MacroAssembler::AssertUndefinedOrAllocationSite(Register object,
+                                                     Register scratch) {
+  if (emit_debug_code()) {
+    Label done_checking;
+    AssertNotSmi(object);
+    JumpIfRoot(object, Heap::kUndefinedValueRootIndex, &done_checking);
+    Ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset));
+    CompareRoot(scratch, Heap::kAllocationSiteMapRootIndex);
+    Assert(eq, kExpectedUndefinedOrCell);
+    Bind(&done_checking);
+  }
+}
+
+
 void MacroAssembler::AssertString(Register object) {
   if (emit_debug_code()) {
     UseScratchRegisterScope temps(this);
     Register temp = temps.AcquireX();
     STATIC_ASSERT(kSmiTag == 0);
     Tst(object, kSmiTagMask);
     Check(ne, kOperandIsASmiAndNotAString);
     Ldr(temp, FieldMemOperand(object, HeapObject::kMapOffset));
     CompareInstanceType(temp, temp, FIRST_NONSTRING_TYPE);
     Check(lo, kOperandIsNotAString);
@@ skipping 3580 matching lines @@
   }
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64