Provide baseline for experimental GC implementation.

src/ia32/stub-cache-ia32.cc

 // Copyright 2006-2009 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 800 matching lines @@
   // Adjust for the number of properties stored in the object. Even in the
   // face of a transition we can use the old map here because the size of the
   // object and the number of in-object properties is not going to change.
   index -= object->map()->inobject_properties();
 
   if (index < 0) {
     // Set the property straight into the object.
     int offset = object->map()->instance_size() + (index * kPointerSize);
     __ mov(FieldOperand(receiver_reg, offset), eax);
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
     // Update the write barrier for the array address.
     // Pass the value being stored in the now unused name_reg.
     __ mov(name_reg, Operand(eax));
     __ RecordWrite(receiver_reg, offset, name_reg, scratch);
+#endif
   } else {
     // Write to the properties array.
     int offset = index * kPointerSize + FixedArray::kHeaderSize;
     // Get the properties array (optimistically).
     __ mov(scratch, FieldOperand(receiver_reg, JSObject::kPropertiesOffset));
     __ mov(FieldOperand(scratch, offset), eax);
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
     // Update the write barrier for the array address.
     // Pass the value being stored in the now unused name_reg.
     __ mov(name_reg, Operand(eax));
     __ RecordWrite(scratch, offset, name_reg, receiver_reg);
+#endif
   }
 
   // Return the value (register eax).
   __ ret(0);
 }
 
 
 // Generate code to check that a global property cell is empty. Create
 // the property cell at compilation time if no cell exists for the
 // property.
@@ skipping 625 matching lines @@
 
     // Get the elements array of the object.
     __ mov(ebx, FieldOperand(edx, JSArray::kElementsOffset));
 
     // Check that the elements are in fast mode and writable.
     __ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
            Immediate(Factory::fixed_array_map()));
     __ j(not_equal, &call_builtin);
 
     if (argc == 1) {  // Otherwise fall through to call builtin.
-      Label exit, with_write_barrier, attempt_to_grow_elements;
+      Label exit, attempt_to_grow_elements;
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
+      Label with_write_barrier;
+#endif
 
       // Get the array's length into eax and calculate new length.
       __ mov(eax, FieldOperand(edx, JSArray::kLengthOffset));
       STATIC_ASSERT(kSmiTagSize == 1);
       STATIC_ASSERT(kSmiTag == 0);
       __ add(Operand(eax), Immediate(Smi::FromInt(argc)));
 
       // Get the element's length into ecx.
       __ mov(ecx, FieldOperand(ebx, FixedArray::kLengthOffset));
 
       // Check if we could survive without allocation.
       __ cmp(eax, Operand(ecx));
       __ j(greater, &attempt_to_grow_elements);
 
       // Save new length.
       __ mov(FieldOperand(edx, JSArray::kLengthOffset), eax);
 
       // Push the element.
       __ lea(edx, FieldOperand(ebx,
                                eax, times_half_pointer_size,
                                FixedArray::kHeaderSize - argc * kPointerSize));
       __ mov(ecx, Operand(esp, argc * kPointerSize));
       __ mov(Operand(edx, 0), ecx);
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
       // Check if value is a smi.
       __ test(ecx, Immediate(kSmiTagMask));
       __ j(not_zero, &with_write_barrier);
+#endif
 
       __ bind(&exit);
       __ ret((argc + 1) * kPointerSize);
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
       __ bind(&with_write_barrier);
 
       __ InNewSpace(ebx, ecx, equal, &exit);
 
       __ RecordWriteHelper(ebx, edx, ecx);
       __ ret((argc + 1) * kPointerSize);
+#endif
 
       __ bind(&attempt_to_grow_elements);
       if (!FLAG_inline_new) {
         __ jmp(&call_builtin);
       }
 
       ExternalReference new_space_allocation_top =
           ExternalReference::new_space_allocation_top_address();
       ExternalReference new_space_allocation_limit =
           ExternalReference::new_space_allocation_limit_address();
@@ skipping 1147 matching lines @@
     __ j(above_equal, &miss, not_taken);
   } else {
     __ cmp(ecx, FieldOperand(edi, FixedArray::kLengthOffset));  // Compare smis.
     __ j(above_equal, &miss, not_taken);
   }
 
   // Do the store and update the write barrier. Make sure to preserve
   // the value in register eax.
   __ mov(edx, Operand(eax));
   __ mov(FieldOperand(edi, ecx, times_2, FixedArray::kHeaderSize), eax);
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
   __ RecordWrite(edi, 0, edx, ecx);
+#endif
 
   // Done.
   __ ret(0);
 
   // Handle store cache miss.
   __ bind(&miss);
   Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Miss));
   __ jmp(ic, RelocInfo::CODE_TARGET);
 
   // Return the generated code.
@@ skipping 585 matching lines @@
   // Return the generated code.
   return GetCode();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32