1 files changed, 32 insertions, 0 deletions
diff --git a/llvm/unittests/ProfileData/InstrProfTest.cpp b/llvm/unittests/ProfileData/InstrProfTest.cpp
index a9257fe316e..6891931e4d2 100644
--- a/llvm/unittests/ProfileData/InstrProfTest.cpp
+++ b/llvm/unittests/ProfileData/InstrProfTest.cpp
@@ -350,6 +350,38 @@ TEST_F(InstrProfTest, get_icall_data_merge1) {
   ASSERT_EQ(2U, VD_4[2].Count);
 }
 
+TEST_F(InstrProfTest, get_icall_data_merge1_saturation) {
+  const uint64_t Max = std::numeric_limits<uint64_t>::max();
+
+  InstrProfRecord Record1("caller", 0x1234, {1});
+  InstrProfRecord Record2("caller", 0x1234, {1});
+  InstrProfRecord Record3("callee1", 0x1235, {3, 4});
+
+  Record1.reserveSites(IPVK_IndirectCallTarget, 1);
+  InstrProfValueData VD1[] = {{(uint64_t) "callee1", 1}};
+  Record1.addValueData(IPVK_IndirectCallTarget, 0, VD1, 1, nullptr);
+
+  Record2.reserveSites(IPVK_IndirectCallTarget, 1);
+  InstrProfValueData VD2[] = {{(uint64_t) "callee1", Max}};
+  Record2.addValueData(IPVK_IndirectCallTarget, 0, VD2, 1, nullptr);
+
+  Writer.addRecord(std::move(Record1));
+  Writer.addRecord(std::move(Record2));
+  Writer.addRecord(std::move(Record3));
+
+  auto Profile = Writer.writeBuffer();
+  readProfile(std::move(Profile));
+
+  // Verify saturation of counts.
+  ErrorOr<InstrProfRecord> R = Reader->getInstrProfRecord("caller", 0x1234);
+  ASSERT_TRUE(NoError(R.getError()));
+  ASSERT_EQ(1U, R.get().getNumValueSites(IPVK_IndirectCallTarget));
+  std::unique_ptr<InstrProfValueData[]> VD =
+          R.get().getValueForSite(IPVK_IndirectCallTarget, 0);
+  ASSERT_EQ(StringRef("callee1"), StringRef((const char *)VD[0].Value, 7));
+  ASSERT_EQ(Max, VD[0].Count);
+}
+
 TEST_F(InstrProfTest, get_max_function_count) {
   InstrProfRecord Record1("foo", 0x1234, {1ULL << 31, 2});
   InstrProfRecord Record2("bar", 0, {1ULL << 63});