Method MatchTypeForwardPointersByTypeOp

source/diff/diff.cpp:1568–1594

}

void Differ::MatchTypeForwardPointersByTypeOp(const IdGroup& src,
                                              const IdGroup& dst) {
  // Given two sets of compatible groups of OpTypeForwardPointer instructions,
  // attempts to match them by type op.  Must be called after
  // MatchTypeForwardPointersByName to match as many as possible by debug info.

  // Remove ids that are matched with debug info in
  // MatchTypeForwardPointersByName.
  IdGroup src_unmatched_ids;
  IdGroup dst_unmatched_ids;

  std::copy_if(src.begin(), src.end(), std::back_inserter(src_unmatched_ids),
               [this](uint32_t id) { return !id_map_.IsSrcMapped(id); });
  std::copy_if(dst.begin(), dst.end(), std::back_inserter(dst_unmatched_ids),
               [this](uint32_t id) { return !id_map_.IsDstMapped(id); });

  // Match only if there's a unique forward declaration with this
  // storage class and type opcode.  If both have debug info, they
  // must not have been matchable.
  if (src_unmatched_ids.size() == 1 && dst_unmatched_ids.size() == 1) {
    uint32_t src_id = src_unmatched_ids[0];
    uint32_t dst_id = dst_unmatched_ids[0];
    if (!HasName(src_id_to_, src_id) || !HasName(dst_id_to_, dst_id)) {
      id_map_.MapIds(src_id, dst_id);
    }
  }
}

InstructionList Differ::GetFunctionBody(opt::IRContext* context,
                                        opt::Function& function) {