Track representations of fields

src/ia32/macro-assembler-ia32.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 2864 matching lines @@
          IsOnEvacuationCandidate(*map));
   if (mask < (1 << kBitsPerByte)) {
     test_b(Operand::StaticVariable(reference), static_cast<uint8_t>(mask));
   } else {
     test(Operand::StaticVariable(reference), Immediate(mask));
   }
   j(cc, condition_met, condition_met_distance);
 }
 
 
+void MacroAssembler::CheckMapDeprecated(Handle<Map> map,
+                                        Register scratch,
+                                        Label* if_deprecated) {
+  if (map->CanBeDeprecated()) {
+    mov(scratch, map);
+    mov(scratch, FieldOperand(scratch, Map::kBitField3Offset));
+    and_(scratch, Immediate(Smi::FromInt(Map::Deprecated::kMask)));
+    j(not_zero, if_deprecated);
+  }
+}
+
+
 void MacroAssembler::JumpIfBlack(Register object,
                                  Register scratch0,
                                  Register scratch1,
                                  Label* on_black,
                                  Label::Distance on_black_near) {
   HasColor(object, scratch0, scratch1,
            on_black, on_black_near,
            1, 0);  // kBlackBitPattern.
   ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0);
 }
@@ skipping 217 matching lines @@
   j(greater, &no_info_available);
   cmp(MemOperand(scratch_reg, -AllocationSiteInfo::kSize),
       Immediate(Handle<Map>(isolate()->heap()->allocation_site_info_map())));
   bind(&no_info_available);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32