MIPS: Utility functions for pretenure call new.

src/mips/macro-assembler-mips.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 4799 matching lines @@
     Check(ne, kOperandIsASmiAndNotAName, t0, Operand(zero_reg));
     push(object);
     lw(object, FieldMemOperand(object, HeapObject::kMapOffset));
     lbu(object, FieldMemOperand(object, Map::kInstanceTypeOffset));
     Check(le, kOperandIsNotAName, object, Operand(LAST_NAME_TYPE));
     pop(object);
   }
 }
 
 
+void MacroAssembler::AssertUndefinedOrAllocationSite(Register object,
+                                                     Register scratch) {
+  if (emit_debug_code()) {
+    Label done_checking;
+    AssertNotSmi(object);
+    LoadRoot(scratch, Heap::kUndefinedValueRootIndex);
+    Branch(&done_checking, eq, object, Operand(scratch));
+    push(object);
+    lw(object, FieldMemOperand(object, HeapObject::kMapOffset));
+    LoadRoot(scratch, Heap::kAllocationSiteMapRootIndex);
+    Assert(eq, kExpectedUndefinedOrCell, object, Operand(scratch));
+    pop(object);
+    bind(&done_checking);
+  }
+}
+
+
 void MacroAssembler::AssertIsRoot(Register reg, Heap::RootListIndex index) {
   if (emit_debug_code()) {
     ASSERT(!reg.is(at));
     LoadRoot(at, index);
     Check(eq, kHeapNumberMapRegisterClobbered, reg, Operand(at));
   }
 }
 
 
 void MacroAssembler::JumpIfNotHeapNumber(Register object,
@@ skipping 894 matching lines @@
   }
   if (ms.shift() > 0) {
     sra(result, result, ms.shift());
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS