From 5dcdd411acb3ee7eecc76a22e2d2c2e49646149d Mon Sep 17 00:00:00 2001
From: Xinliang David Li <davidxl@google.com>
Date: Fri, 8 Jan 2016 06:54:27 +0000
Subject: [PATCH] Add value site truncation unit test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257153 91177308-0d34-0410-b5e6-96231b3b80d8
---
 unittests/ProfileData/InstrProfTest.cpp | 66 +++++++++++++++++++++----
 1 file changed, 56 insertions(+), 10 deletions(-)

diff --git a/unittests/ProfileData/InstrProfTest.cpp b/unittests/ProfileData/InstrProfTest.cpp
index b71712fba7d..2012e05e3b2 100644
--- a/unittests/ProfileData/InstrProfTest.cpp
+++ b/unittests/ProfileData/InstrProfTest.cpp
@@ -290,12 +290,11 @@ TEST_F(InstrProfTest, get_icall_data_merge1) {
                               {uint64_t(callee4), 4}};
   Record11.addValueData(IPVK_IndirectCallTarget, 0, VD0, 4, nullptr);
 
-  // No valeu profile data at the second site.
+  // No value profile data at the second site.
   Record11.addValueData(IPVK_IndirectCallTarget, 1, nullptr, 0, nullptr);
 
-  InstrProfValueData VD2[] = {{uint64_t(callee1), 1},
-                              {uint64_t(callee2), 2},
-                              {uint64_t(callee3), 3}};
+  InstrProfValueData VD2[] = {
+      {uint64_t(callee1), 1}, {uint64_t(callee2), 2}, {uint64_t(callee3), 3}};
   Record11.addValueData(IPVK_IndirectCallTarget, 2, VD2, 3, nullptr);
 
   InstrProfValueData VD3[] = {{uint64_t(callee1), 1}};
@@ -308,16 +307,14 @@ TEST_F(InstrProfTest, get_icall_data_merge1) {
 
   // A differnt record for the same caller.
   Record12.reserveSites(IPVK_IndirectCallTarget, 5);
-  InstrProfValueData VD02[] = {{uint64_t(callee2), 5},
-                               {uint64_t(callee3), 3}};
+  InstrProfValueData VD02[] = {{uint64_t(callee2), 5}, {uint64_t(callee3), 3}};
   Record12.addValueData(IPVK_IndirectCallTarget, 0, VD02, 2, nullptr);
 
-  // No valeu profile data at the second site.
+  // No value profile data at the second site.
   Record12.addValueData(IPVK_IndirectCallTarget, 1, nullptr, 0, nullptr);
 
-  InstrProfValueData VD22[] = {{uint64_t(callee2), 1},
-                               {uint64_t(callee3), 3},
-                               {uint64_t(callee4), 4}};
+  InstrProfValueData VD22[] = {
+      {uint64_t(callee2), 1}, {uint64_t(callee3), 3}, {uint64_t(callee4), 4}};
   Record12.addValueData(IPVK_IndirectCallTarget, 2, VD22, 3, nullptr);
 
   Record12.addValueData(IPVK_IndirectCallTarget, 3, nullptr, 0, nullptr);
@@ -436,6 +433,55 @@ TEST_F(InstrProfTest, get_icall_data_merge1_saturation) {
   ASSERT_EQ(Max, VD[0].Count);
 }
 
+// This test tests that when there are too many values
+// for a given site, the merged results are properly
+// truncated.
+TEST_F(InstrProfTest, get_icall_data_merge_site_trunc) {
+  static const char caller[] = "caller";
+
+  InstrProfRecord Record11(caller, 0x1234, {1, 2});
+  InstrProfRecord Record12(caller, 0x1234, {1, 2});
+
+  // 2 value sites.
+  Record11.reserveSites(IPVK_IndirectCallTarget, 2);
+  InstrProfValueData VD0[255];
+  for (int I = 0; I < 255; I++) {
+    VD0[I].Value = 2 * I;
+    VD0[I].Count = 2 * I + 1000;
+  }
+
+  Record11.addValueData(IPVK_IndirectCallTarget, 0, VD0, 255, nullptr);
+  Record11.addValueData(IPVK_IndirectCallTarget, 1, nullptr, 0, nullptr);
+
+  Record12.reserveSites(IPVK_IndirectCallTarget, 2);
+  InstrProfValueData VD1[255];
+  for (int I = 0; I < 255; I++) {
+    VD1[I].Value = 2 * I + 1;
+    VD1[I].Count = 2 * I + 1001;
+  }
+
+  Record12.addValueData(IPVK_IndirectCallTarget, 0, VD1, 255, nullptr);
+  Record12.addValueData(IPVK_IndirectCallTarget, 1, nullptr, 0, nullptr);
+
+  Writer.addRecord(std::move(Record11));
+  // Merge profile data.
+  Writer.addRecord(std::move(Record12));
+
+  auto Profile = Writer.writeBuffer();
+  readProfile(std::move(Profile));
+
+  ErrorOr<InstrProfRecord> R = Reader->getInstrProfRecord("caller", 0x1234);
+  ASSERT_TRUE(NoError(R.getError()));
+  std::unique_ptr<InstrProfValueData[]> VD(
+      R.get().getValueForSite(IPVK_IndirectCallTarget, 0));
+  ASSERT_EQ(2U, R.get().getNumValueSites(IPVK_IndirectCallTarget));
+  ASSERT_EQ(255U, R.get().getNumValueDataForSite(IPVK_IndirectCallTarget, 0));
+  for (int I = 0; I < 255; I++) {
+    ASSERT_EQ(VD[I].Value, 509 - I);
+    ASSERT_EQ(VD[I].Count, 1509 - I);
+  }
+}
+
 // Synthesize runtime value profile data.
 ValueProfNode Site1Values[5] = {{{uint64_t("callee1"), 400}, &Site1Values[1]},
                                 {{uint64_t("callee2"), 1000}, &Site1Values[2]},
-- 
2.34.1