65   explicit BackReference(uint32_t bitfield) : bitfield_(bitfield) {}  in BackReference()
67   BackReference() : bitfield_(kInvalidValue) {}  in BackReference()
91   bool is_valid() const { return bitfield_ != kInvalidValue; }  in is_valid()
92   bool is_source() const { return bitfield_ == kSourceValue; }  in is_source()
93   bool is_global_proxy() const { return bitfield_ == kGlobalProxyValue; }  in is_global_proxy()
97     return SpaceBits::decode(bitfield_);  in space()
102     return ChunkOffsetBits::decode(bitfield_) << kObjectAlignmentBits;  in chunk_offset()
108     return ChunkOffsetBits::decode(bitfield_);  in large_object_index()
113     return ChunkIndexBits::decode(bitfield_);  in chunk_index()
118     return bitfield_ & (ChunkOffsetBits::kMask | ChunkIndexBits::kMask);  in reference()
121   uint32_t bitfield() const { return bitfield_; }  in bitfield()
142   uint32_t bitfield_;  variable