1 files changed, 13 insertions, 0 deletions
diff --git a/llvm/lib/ProfileData/ProfileSummaryBuilder.cpp b/llvm/lib/ProfileData/ProfileSummaryBuilder.cpp
index 3299b5f920694..5d3a076409427 100644
--- a/llvm/lib/ProfileData/ProfileSummaryBuilder.cpp
+++ b/llvm/lib/ProfileData/ProfileSummaryBuilder.cpp
@@ -31,6 +31,19 @@ static const uint32_t DefaultCutoffsData[] = {
 const ArrayRef<uint32_t> ProfileSummaryBuilder::DefaultCutoffs =
     DefaultCutoffsData;
 
+const ProfileSummaryEntry &
+ProfileSummaryBuilder::getEntryForPercentile(SummaryEntryVector &DS,
+                                             uint64_t Percentile) {
+  auto It = partition_point(DS, [=](const ProfileSummaryEntry &Entry) {
+    return Entry.Cutoff < Percentile;
+  });
+  // The required percentile has to be <= one of the percentiles in the
+  // detailed summary.
+  if (It == DS.end())
+    report_fatal_error("Desired percentile exceeds the maximum cutoff");
+  return *It;
+}
+
 void InstrProfSummaryBuilder::addRecord(const InstrProfRecord &R) {
   // The first counter is not necessarily an entry count for IR
   // instrumentation profiles.