+instrprof_error InstrProfRecord::merge(InstrProfRecord &Other) {
+ // If the number of counters doesn't match we either have bad data
+ // or a hash collision.
+ if (Counts.size() != Other.Counts.size())
+ return instrprof_error::count_mismatch;
+
+ for (size_t I = 0, E = Other.Counts.size(); I < E; ++I) {
+ if (Counts[I] + Other.Counts[I] < Counts[I])
+ return instrprof_error::counter_overflow;
+ Counts[I] += Other.Counts[I];
+ }
+
+ for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind) {
+ instrprof_error result = mergeValueProfData(Kind, Other);
+ if (result != instrprof_error::success)
+ return result;
+ }
+
+ return instrprof_error::success;
+}
+