Provide baseline for experimental GC implementation.

src/arm/stub-cache-arm.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 454 matching lines @@
 
   if (index < 0) {
     // Set the property straight into the object.
     int offset = object->map()->instance_size() + (index * kPointerSize);
     __ str(r0, FieldMemOperand(receiver_reg, offset));
 
     // Skip updating write barrier if storing a smi.
     __ tst(r0, Operand(kSmiTagMask));
     __ b(eq, &exit);
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
     // Update the write barrier for the array address.
     // Pass the now unused name_reg as a scratch register.
     __ RecordWrite(receiver_reg, Operand(offset), name_reg, scratch);
+#endif
   } else {
     // Write to the properties array.
     int offset = index * kPointerSize + FixedArray::kHeaderSize;
     // Get the properties array
     __ ldr(scratch, FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
     __ str(r0, FieldMemOperand(scratch, offset));
 
     // Skip updating write barrier if storing a smi.
     __ tst(r0, Operand(kSmiTagMask));
     __ b(eq, &exit);
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
     // Update the write barrier for the array address.
     // Ok to clobber receiver_reg and name_reg, since we return.
     __ RecordWrite(scratch, Operand(offset), name_reg, receiver_reg);
+#endif
   }
 
   // Return the value (register r0).
   __ bind(&exit);
   __ Ret();
 }
 
 
 void StubCompiler::GenerateLoadMiss(MacroAssembler* masm, Code::Kind kind) {
   ASSERT(kind == Code::LOAD_IC || kind == Code::KEYED_LOAD_IC);
@@ skipping 923 matching lines @@
     Register end_elements = r5;
 
     // Get the elements array of the object.
     __ ldr(elements, FieldMemOperand(receiver, JSArray::kElementsOffset));
 
     // Check that the elements are in fast mode and writable.
     __ CheckMap(elements, r0,
                 Heap::kFixedArrayMapRootIndex, &call_builtin, true);
 
     if (argc == 1) {  // Otherwise fall through to call the 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 r0 and calculate new length.
       __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
       STATIC_ASSERT(kSmiTagSize == 1);
       STATIC_ASSERT(kSmiTag == 0);
       __ add(r0, r0, Operand(Smi::FromInt(argc)));
 
       // Get the element's length.
       __ ldr(r4, FieldMemOperand(elements, FixedArray::kLengthOffset));
 
       // Check if we could survive without allocation.
       __ cmp(r0, r4);
       __ b(gt, &attempt_to_grow_elements);
 
       // Save new length.
       __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
 
       // Push the element.
       __ ldr(r4, MemOperand(sp, (argc - 1) * kPointerSize));
       // We may need a register containing the address end_elements below,
       // so write back the value in end_elements.
       __ add(end_elements, elements,
              Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize));
       const int kEndElementsOffset =
           FixedArray::kHeaderSize - kHeapObjectTag - argc * kPointerSize;
       __ str(r4, MemOperand(end_elements, kEndElementsOffset, PreIndex));
 
       // Check for a smi.
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
       __ BranchOnNotSmi(r4, &with_write_barrier);
+#endif
       __ bind(&exit);
       __ Drop(argc + 1);
       __ Ret();
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
       __ bind(&with_write_barrier);
       __ InNewSpace(elements, r4, eq, &exit);
       __ RecordWriteHelper(elements, end_elements, r4);
       __ Drop(argc + 1);
       __ Ret();
+#endif
 
       __ bind(&attempt_to_grow_elements);
       // r0: array's length + 1.
       // r4: elements' length.
 
       if (!FLAG_inline_new) {
         __ b(&call_builtin);
       }
 
       ExternalReference new_space_allocation_top =
@@ skipping 1550 matching lines @@
   }
   // Compare smis.
   __ cmp(key_reg, scratch);
   __ b(hs, &miss);
 
   __ add(scratch,
          elements_reg, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
   ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2);
   __ str(value_reg,
          MemOperand(scratch, key_reg, LSL, kPointerSizeLog2 - kSmiTagSize));
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
   __ RecordWrite(scratch,
                  Operand(key_reg, LSL, kPointerSizeLog2 - kSmiTagSize),
                  receiver_reg , elements_reg);
+#endif
 
   // value_reg (r0) is preserved.
   // Done.
   __ Ret();
 
   __ bind(&miss);
   Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Miss));
   __ Jump(ic, RelocInfo::CODE_TARGET);
 
   // Return the generated code.
@@ skipping 143 matching lines @@
   // Return the generated code.
   return GetCode();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM