if (!CallValueId)
continue;
// The mapping from OriginalId to GUID may return a GUID
- // that corresponds to a static varible. Filter it out here.
+ // that corresponds to a static variable. Filter it out here.
+ // This can happen when
+ // 1) There is a call to a library function which does not have
+ // a CallValidId;
+ // 2) There is a static variable with the OriginalGUID identical
+ // to the GUID of the library function in 1);
+ // When this happens, the logic for SamplePGO kicks in and
+ // the static varible in 2) will be found, which needs to be
+ // filtered out.
auto *GVSum = Index.getGlobalValueSummary(GUID, false);
if (GVSum &&
GVSum->getSummaryKind() == GlobalValueSummary::GlobalVarKind)