Track representations of fields

src/x64/macro-assembler-x64.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 4392 matching lines @@
   if (mask < (1 << kBitsPerByte)) {
     testb(Operand(scratch, MemoryChunk::kFlagsOffset),
           Immediate(static_cast<uint8_t>(mask)));
   } else {
     testl(Operand(scratch, MemoryChunk::kFlagsOffset), Immediate(mask));
   }
   j(cc, condition_met, condition_met_distance);
 }
 
 
+void MacroAssembler::CheckMapDeprecated(Handle<Map> map,
+                                        Register scratch,
+                                        Label* if_deprecated) {
+  if (map->CanBeDeprecated()) {
+    Move(scratch, map);
+    movq(scratch, FieldOperand(scratch, Map::kBitField3Offset));
+    SmiToInteger32(scratch, scratch);
+    and_(scratch, Immediate(Map::Deprecated::kMask));
+    j(not_zero, if_deprecated);
+  }
+}
+
+
 void MacroAssembler::JumpIfBlack(Register object,
                                  Register bitmap_scratch,
                                  Register mask_scratch,
                                  Label* on_black,
                                  Label::Distance on_black_distance) {
   ASSERT(!AreAliased(object, bitmap_scratch, mask_scratch, rcx));
   GetMarkBits(object, bitmap_scratch, mask_scratch);
 
   ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0);
   // The mask_scratch register contains a 1 at the position of the first bit
@@ skipping 208 matching lines @@
   j(greater, &no_info_available);
   CompareRoot(MemOperand(scratch_reg, -AllocationSiteInfo::kSize),
               Heap::kAllocationSiteInfoMapRootIndex);
   bind(&no_info_available);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64