Provide baseline for new GC infrastructure.

src/ia32/ic-ia32.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 1729 matching lines @@
   // last 4 bytes of a six byte register-to-memory move instruction.
   Address offset_address =
       map_check_address + StoreIC::kOffsetToStoreInstruction + 2;
   // The offset should have initial value (kMaxInt - 1), cleared value
   // (-1) or we should be clearing the inlined version.
   ASSERT(*reinterpret_cast<int*>(offset_address) == kMaxInt - 1 ||
          *reinterpret_cast<int*>(offset_address) == -1 ||
          (offset == 0 && map == Heap::null_value()));
   *reinterpret_cast<int*>(offset_address) = offset - kHeapObjectTag;
 
-  // Patch the offset in the write-barrier code. The offset is the
-  // last 4 bytes of a six byte lea instruction.
-  offset_address = map_check_address + delta_to_record_write + 2;
-  // The offset should have initial value (kMaxInt), cleared value
-  // (-1) or we should be clearing the inlined version.
-  ASSERT(*reinterpret_cast<int*>(offset_address) == kMaxInt ||
-         *reinterpret_cast<int*>(offset_address) == -1 ||
-         (offset == 0 && map == Heap::null_value()));
-  *reinterpret_cast<int*>(offset_address) = offset - kHeapObjectTag;
+  if (!FLAG_new_gc) {
+    // Patch the offset in the write-barrier code. The offset is the
+    // last 4 bytes of a six byte lea instruction.
+    offset_address = map_check_address + delta_to_record_write + 2;
+    // The offset should have initial value (kMaxInt), cleared value
+    // (-1) or we should be clearing the inlined version.
+    ASSERT(*reinterpret_cast<int*>(offset_address) == kMaxInt ||
+           *reinterpret_cast<int*>(offset_address) == -1 ||
+           (offset == 0 && map == Heap::null_value()));
+    *reinterpret_cast<int*>(offset_address) = offset - kHeapObjectTag;
+  }
 
   return true;
 }
 
 
 static bool PatchInlinedMapCheck(Address address, Object* map) {
   if (V8::UseCrankshaft()) return false;
 
   Address test_instruction_address =
       address + Assembler::kCallTargetAddressOffset;
@@ skipping 347 matching lines @@
   // short jump at this position.
   Address jmp_address = test_instruction_address - delta;
   ASSERT(*jmp_address == Assembler::kJmpShortOpcode);
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | not_zero);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32