Macro assembler functions for pretenure call new.

src/x64/macro-assembler-x64.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 3334 matching lines @@
     Check(not_equal, kOperandIsASmiAndNotAName);
     push(object);
     movp(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), isolate()->factory()->allocation_site_map());
+    Assert(equal, kExpectedUndefinedOrCell);
+    bind(&done_checking);
+  }
+}
+
+
 void MacroAssembler::AssertRootValue(Register src,
                                      Heap::RootListIndex root_value_index,
                                      BailoutReason reason) {
   if (emit_debug_code()) {
     ASSERT(!src.is(kScratchRegister));
     LoadRoot(kScratchRegister, root_value_index);
     cmpq(src, kScratchRegister);
     Check(equal, reason);
   }
 }
@@ skipping 1622 matching lines @@
   imull(dividend);
   if (divisor > 0 && ms.multiplier() < 0) addl(rdx, dividend);
   if (divisor < 0 && ms.multiplier() > 0) subl(rdx, dividend);
   if (ms.shift() > 0) sarl(rdx, Immediate(ms.shift()));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64