Macro assembler functions for pretenure call new.

src/a64/macro-assembler-a64.h

Index: src/a64/macro-assembler-a64.h
diff --git a/src/a64/macro-assembler-a64.h b/src/a64/macro-assembler-a64.h
index 651be99a6fb6657ac7f55a2659e71a83cbbea7c1..2a21a7b385242fa549144e99fe823cd9f9ca6849 100644
--- a/src/a64/macro-assembler-a64.h
+++ b/src/a64/macro-assembler-a64.h
@@ -886,6 +886,10 @@ class MacroAssembler : public Assembler {
   // Abort execution if argument is not a name, enabled via --debug-code.
   void AssertName(Register object);
 
+  // Abort execution if argument is not undefined or an AllocationSite, enabled
+  // via --debug-code.
+  void AssertUndefinedOrAllocationSite(Register object, Register scratch);
+
   // Abort execution if argument is not a string, enabled via --debug-code.
   void AssertString(Register object);