Provide baseline for experimental GC implementation.

src/x64/stub-cache-x64.cc

 // Copyright 2010 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 364 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);
     __ movq(FieldOperand(receiver_reg, offset), rax);
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
     // Update the write barrier for the array address.
     // Pass the value being stored in the now unused name_reg.
     __ movq(name_reg, rax);
     __ 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).
     __ movq(scratch, FieldOperand(receiver_reg, JSObject::kPropertiesOffset));
     __ movq(FieldOperand(scratch, offset), rax);
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
     // Update the write barrier for the array address.
     // Pass the value being stored in the now unused name_reg.
     __ movq(name_reg, rax);
     __ RecordWrite(scratch, offset, name_reg, receiver_reg);
+#endif
   }
 
   // Return the value (register rax).
   __ ret(0);
 }
 
 
 void StubCompiler::GenerateLoadArrayLength(MacroAssembler* masm,
                                            Register receiver,
                                            Register scratch,
@@ skipping 795 matching lines @@
 
     // Get the elements array of the object.
     __ movq(rbx, FieldOperand(rdx, JSArray::kElementsOffset));
 
     // Check that the elements are in fast mode and writable.
     __ Cmp(FieldOperand(rbx, HeapObject::kMapOffset),
            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 rax and calculate new length.
       __ SmiToInteger32(rax, FieldOperand(rdx, JSArray::kLengthOffset));
       STATIC_ASSERT(FixedArray::kMaxLength < Smi::kMaxValue);
       __ addl(rax, Immediate(argc));
 
       // Get the element's length into rcx.
       __ SmiToInteger32(rcx, FieldOperand(rbx, FixedArray::kLengthOffset));
 
       // Check if we could survive without allocation.
       __ cmpl(rax, rcx);
       __ j(greater, &attempt_to_grow_elements);
 
       // Save new length.
       __ Integer32ToSmiField(FieldOperand(rdx, JSArray::kLengthOffset), rax);
 
       // Push the element.
       __ movq(rcx, Operand(rsp, argc * kPointerSize));
       __ lea(rdx, FieldOperand(rbx,
                                rax, times_pointer_size,
                                FixedArray::kHeaderSize - argc * kPointerSize));
       __ movq(Operand(rdx, 0), rcx);
 
       // Check if value is a smi.
       __ Integer32ToSmi(rax, rax);  // Return new length as smi.
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
       __ JumpIfNotSmi(rcx, &with_write_barrier);
+#endif
 
       __ bind(&exit);
       __ ret((argc + 1) * kPointerSize);
 
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
       __ bind(&with_write_barrier);
 
       __ InNewSpace(rbx, rcx, equal, &exit);
 
       RecordWriteStub stub(rbx, rdx, rcx);
       __ CallStub(&stub);
 
       __ 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 1291 matching lines @@
     __ SmiCompare(rcx, FieldOperand(rdi, FixedArray::kLengthOffset));
     __ j(above_equal, &miss);
   }
 
   // Do the store and update the write barrier. Make sure to preserve
   // the value in register eax.
   __ movq(rdx, rax);
   __ SmiToInteger32(rcx, rcx);
   __ movq(FieldOperand(rdi, rcx, times_pointer_size, FixedArray::kHeaderSize),
           rax);
+#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
   __ RecordWrite(rdi, 0, rdx, rcx);
+#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 541 matching lines @@
   // Return the generated code.
   return GetCode();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64